WIP

* Recreate ApolloProvider whenever account switches

- It is a force-push of reload page whenever user switches account. It doesn't hurt

* Fix FE2 urls and streamWrapper flag argument

.circleci/config.yml

@@ -76,6 +76,99 @@ jobs:
           paths:
             - speckle-sharp-ci-tools/Installers
 
+  build-connector-mac:
+    macos:
+      xcode: 12.5.1
+    parameters:
+      projname:
+        type: string
+        default: ""
+      slug:
+        type: string
+        default: ""
+      installer:
+        type: boolean
+        default: false
+      converter-files:
+        type: string
+        default: ""
+      installername:
+        type: string
+        default: ""
+      build-config:
+        type: string
+        default: Release
+      bundlename:
+        type: string
+        default: ""
+    steps:
+      - checkout
+      - attach_workspace:
+          at: ./
+      - run:
+          name: Install dotnet
+          command: |
+            curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --channel Current
+
+            $HOME/.dotnet/dotnet --version
+            $HOME/.dotnet/dotnet --list-runtimes
+            $HOME/.dotnet/dotnet --list-sdks
+      - run:
+          name: Create installer target dir
+          command: |
+            mkdir -p speckle-sharp-ci-tools/Installers/<< parameters.slug >>
+      - run:
+          name: Set Environment Variable
+          command: |
+            TAG=$(if [ "${CIRCLE_TAG}" ]; then echo $CIRCLE_TAG; else echo "2.0.999"; fi;)
+            SEMVER=$(echo "$TAG" | sed -e 's/\/[a-zA-Z-]*//')
+            VER=$(echo "$SEMVER" | sed -e 's/-.*//')
+            VERSION=$(echo $VER.$WORKFLOW_NUM)
+            python3 patch_version.py $SEMVER
+          environment:
+            WORKFLOW_NUM: << pipeline.number >>
+      - run:
+          name: Zip Connector files
+          command: |
+            zip -r << parameters.slug >>-mac.zip "./speckle_connector" "./speckle_connector.rb"
+            # Copy installer files
+      - run:
+          name: Copy files to installer
+          command: |
+                  mkdir -p speckle-sharp-ci-tools/Mac/<< parameters.installername >>/.installationFiles/
+                  cp << parameters.slug >>-mac.zip speckle-sharp-ci-tools/Mac/<<parameters.installername>>/.installationFiles
+      # Create installer
+      - run:
+          name: Exit if External PR
+          command: if [ "$CIRCLE_PR_REPONAME" ]; then circleci-agent step halt; fi
+      - run:
+          name: Build Mac installer
+          command: ~/.dotnet/dotnet publish speckle-sharp-ci-tools/Mac/<<parameters.installername>>/<<parameters.installername>>.sln -r osx-x64 -c Release
+      - run:
+          name: Zip installer
+          command: |
+            cd speckle-sharp-ci-tools/Mac/<<parameters.installername>>/bin/Release/net6.0/osx-x64/publish/
+            zip -r <<parameters.slug>>.zip ./
+      - store_artifacts:
+          path: speckle-sharp-ci-tools/Mac/<<parameters.installername>>/bin/Release/net6.0/osx-x64/publish/<<parameters.slug>>.zip
+      - run:
+          name: Copy to installer location
+          command: |
+            TAG=$(if [ "${CIRCLE_TAG}" ]; then echo $CIRCLE_TAG; else echo "2.0.999"; fi;)
+            SEMVER=$(echo "$TAG" | sed -e 's/\/[a-zA-Z-]*//')
+            VER=$(echo "$SEMVER" | sed -e 's/-.*//')
+            VERSION=$(echo $VER.$WORKFLOW_NUM)
+            cp speckle-sharp-ci-tools/Mac/<<parameters.installername>>/bin/Release/net6.0/osx-x64/publish/<<parameters.slug>>.zip speckle-sharp-ci-tools/Installers/<< parameters.slug >>/<<parameters.slug>>-$SEMVER.zip
+          environment:
+            WORKFLOW_NUM: << pipeline.number >>
+      - when:
+          condition: << pipeline.git.tag >>
+          steps:
+            - persist_to_workspace:
+                root: ./
+                paths:
+                  - speckle-sharp-ci-tools/Installers
+  
   get-ci-tools: # Clones our ci tools and persists them to the workspace
     docker:
       - image: cimg/base:2021.01
@@ -99,6 +192,7 @@ jobs:
           root: ./
           paths:
             - speckle-sharp-ci-tools
+
   deploy-manager2:
     docker:
       - image: mcr.microsoft.com/dotnet/sdk:6.0
@@ -146,17 +240,37 @@ workflows:
               only: /.*/
           context: innosetup
 
+      - build-connector-mac:
+          slug: sketchup
+          requires:
+            - get-ci-tools
+            - build-ui
+          filters:
+            tags:
+              only: /.*/
+          installername: SpeckleSketchUpInstall
+
       - deploy-manager2:
           context: do-spaces-speckle-releases
           slug: sketchup
           os: Win
           extension: exe
           requires:
-            - get-ci-tools
-            - build-ui
             - build-connector
           filters:
             tags:
               only: /([0-9]+)\.([0-9]+)\.([0-9]+)(?:-\w+)?$/
             branches:
               ignore: /.*/ # For testing only! /ci\/.*/
+      - deploy-manager2:
+          context: do-spaces-speckle-releases
+          slug: sketchup
+          os: OSX
+          extension: zip
+          requires:
+            - build-connector-mac
+          filters:
+            tags:
+              only: /([0-9]+)\.([0-9]+)\.([0-9]+)(?:-\w+)?$/
+            branches:
+              ignore: /.*/ # For testing only! /ci\/.*/

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.1)
+    addressable (2.8.4)
       public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
     axiom-types (0.1.1)
@@ -26,7 +26,7 @@ GEM
       path_expander (~> 1.0)
       ruby_parser (~> 3.1, > 3.1.0)
       sexp_processor (~> 4.8)
-    git (1.12.0)
+    git (1.18.0)
       addressable (~> 2.8)
       rchardet (~> 1.8)
     ice_nine (0.11.2)
@@ -48,8 +48,7 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    psych (3.3.4)
-    public_suffix (5.0.0)
+    public_suffix (5.0.1)
     rainbow (3.1.1)
     rake (13.0.6)
     rchardet (1.8.0)

speckle_connector/bootstrap.rb

@@ -3,6 +3,7 @@
 require 'sketchup'
 require 'pathname'
 require 'speckle_connector/debug'
+require_relative 'src/log/log'
 require_relative 'src/ui/sketchup_ui'
 require_relative 'src/ui/ui_controller'
 require_relative 'src/commands/menu_command_handler'

speckle_connector/debug.rb

@@ -15,7 +15,9 @@ module SpeckleConnector
   def self.reload
     load(__FILE__)
     pattern = File.join(__dir__, '**/*.rb')
-    Dir.glob(pattern).each { |file| load(file) }
+    # TODO: Here is a opportunity to improve reloading process.
+    #  We can cache last edited time of the each file later to check which file need to be reloaded.
+    Dir.glob(pattern).each { |file| load(file) unless file.include?('bootstrap') }
        .size
   end
   # rubocop:enable SketchupSuggestions/FileEncoding

speckle_connector/src/actions/apply_mappings.rb

@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'mapped_entities_updated'
+require_relative 'events/selection_event_action'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Apply mappings for selected entities.
+    class ApplyMappings < Action
+      def initialize(entities_to_map, method, category, family,
+                     family_type, level, name, is_definition)
+        super()
+        @entities_to_map = entities_to_map
+        @method = method
+        @category = category
+        @name = name
+        @family = family
+        @family_type = family_type
+        @level = level
+        @is_definition = is_definition
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      # rubocop:disable Metrics/AbcSize
+      # rubocop:disable Metrics/CyclomaticComplexity
+      # rubocop:disable Metrics/PerceivedComplexity
+      # rubocop:disable Metrics/MethodLength
+      def update_state(state)
+        sketchup_model = state.sketchup_state.sketchup_model
+        entities = if sketchup_model.active_path.nil?
+                     sketchup_model.entities
+                   else
+                     sketchup_model.active_path.last.definition.entities
+                   end
+
+        # Collect entities from entity ids that comes from UI as list
+        entities_to_map = entities.select { |e| @entities_to_map.include?(e.persistent_id) }
+
+        # Switch to definitions if all entities are component instance and UI flag shows that
+        if entities_to_map.all? { |e| e.is_a?(Sketchup::ComponentInstance) } && @is_definition
+          entities_to_map = entities_to_map.collect(&:definition).uniq
+        end
+
+        # Store speckle state to update with mapped entities.
+        speckle_state = state.speckle_state
+        entities_to_map.each do |entity|
+          name = if @name == '<Mixed>'
+                   entity.respond_to?(:name) ? entity.name : ''
+                 else
+                   @name
+                 end
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.set_attribute(entity, :category, @category)
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.set_attribute(entity, :name, name)
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.set_attribute(entity, :method, @method)
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.set_attribute(entity, :family, @family)
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.set_attribute(entity, :family_type, @family_type)
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.set_attribute(entity, :level, @level)
+          speckle_state = speckle_state.with_mapped_entity(entity)
+        end
+
+        new_state = MappedEntitiesUpdated.update_state(state.with_speckle_state(speckle_state))
+        Events::SelectionEventAction.update_state(new_state, { apply: true })
+      end
+      # rubocop:enable Metrics/AbcSize
+      # rubocop:enable Metrics/CyclomaticComplexity
+      # rubocop:enable Metrics/PerceivedComplexity
+      # rubocop:enable Metrics/MethodLength
+    end
+  end
+end

speckle_connector/src/actions/clear_mapper_source.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Clear mapper source.
+    class ClearMapperSource < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data)
+        new_speckle_state = state.speckle_state.with_removed_mapper_source
+        erase_levels(state)
+        state.with_speckle_state(new_speckle_state)
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      def self.erase_levels(state)
+        levels = state.sketchup_state.sketchup_model.definitions.select do |definition|
+          SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.get_attribute(definition, :speckle_type) ==
+            OBJECTS_BUILTELEMENTS_REVIT_LEVEL
+        end
+        levels.each do |level|
+          level.entities.clear!
+          level.instances.each(&:erase!)
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/clear_mappings.rb

@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'mapped_entities_updated'
+require_relative 'events/selection_event_action'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Clear mappings for selected entities.
+    class ClearMappings < Action
+      def initialize(entities_to_map, is_definition)
+        super()
+        @entities_to_map = entities_to_map
+        @is_definition = is_definition
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      # rubocop:disable Metrics/CyclomaticComplexity
+      # rubocop:disable Metrics/PerceivedComplexity
+      def update_state(state)
+        sketchup_model = state.sketchup_state.sketchup_model
+        entities = if sketchup_model.active_path.nil?
+                     sketchup_model.entities
+                   else
+                     sketchup_model.active_path.last.definition.entities
+                   end
+
+        # Collect entities from entity ids that comes from UI as list
+        entities_to_map = entities.select { |e| @entities_to_map.include?(e.persistent_id) }
+
+        # Switch to definitions if all entities are component instance and UI flag shows that
+        if entities_to_map.all? { |e| e.is_a?(Sketchup::ComponentInstance) } && @is_definition
+          entities_to_map = entities_to_map.collect(&:definition).uniq
+        end
+
+        # Store speckle state to update with mapped entities.
+        speckle_state = state.speckle_state
+        entities_to_map.each do |entity|
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.remove_dictionary(entity)
+          speckle_state = speckle_state.with_removed_mapped_entity(entity)
+        end
+
+        new_state = MappedEntitiesUpdated.update_state(state.with_speckle_state(speckle_state))
+        Events::SelectionEventAction.update_state(new_state, { clear: true })
+      end
+      # rubocop:enable Metrics/CyclomaticComplexity
+      # rubocop:enable Metrics/PerceivedComplexity
+    end
+  end
+end

speckle_connector/src/actions/clear_mappings_from_table.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'mapped_entities_updated'
+require_relative 'events/selection_event_action'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Clear mappings for selected entities from mapped elements table.
+    class ClearMappingsFromTable < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, data)
+        # Flat entities to clear mappings
+        flat_entities = SketchupModel::Query::Entity.flat_entities(state.sketchup_state.sketchup_model.entities)
+
+        # Collect entity ids to clear mappings
+        entity_ids = data.collect { |_, entities| entities['selectedElements'].collect { |e| e['entityId'] } }.flatten
+        # Store speckle state to update with mapped entities.
+        speckle_state = state.speckle_state
+        flat_entities.each do |entity|
+          next unless entity_ids.include?(entity.persistent_id)
+
+          SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.remove_dictionary(entity)
+          speckle_state = speckle_state.with_removed_mapped_entity(entity)
+        end
+
+        new_state = MappedEntitiesUpdated.update_state(state.with_speckle_state(speckle_state))
+        Events::SelectionEventAction.update_state(new_state, { clear: true })
+      end
+    end
+  end
+end

speckle_connector/src/actions/events/app_event_action.rb

@@ -2,6 +2,7 @@
 
 require_relative 'event_action'
 require_relative '../load_sketchup_model'
+require_relative '../collect_preferences'
 
 module SpeckleConnector
   module Actions
@@ -18,7 +19,13 @@ module SpeckleConnector
             return state unless event_data&.any?
 
             model = event_data.flatten.first
-            Actions::LoadSketchupModel.update_state(state, model)
+            # LoadSketchupModel action should be responsible to update all model specific data for state and then
+            #  should notify the UI to update it's components.
+            new_state = Actions::LoadSketchupModel.update_state(state, model)
+            # Action to let UI to render itself with new preferences state
+            # TODO: Later UI should be updated if any stream is invalid after
+            #  we collected speckle_entities appropriately
+            CollectPreferences.update_state(new_state, {})
           end
         end
 

speckle_connector/src/actions/events/entities_event_action.rb

@@ -34,7 +34,10 @@ module SpeckleConnector
               ids_to_invalidate = modified_faces.collect(&:persistent_id) + parent_ids
               entities_to_invalidate = speckle_entities_to_invalidate(speckle_state, ids_to_invalidate)
               new_speckle_state = invalidate_speckle_entities(speckle_state, entities_to_invalidate)
-              return state.with_speckle_state(new_speckle_state.with_invalid_streams_queue)
+              # This is the place we can send information to UI for diffing check
+              diffing = state.user_state.preferences[:user][:diffing]
+              new_speckle_state = new_speckle_state.with_invalid_streams_queue if diffing
+              return state.with_speckle_state(new_speckle_state)
             end
 
             state

speckle_connector/src/actions/events/event_action.rb

@@ -12,8 +12,8 @@ module SpeckleConnector
 
         # Handle the events that were collected by the observer. In case of the selection observer,
         # we only need to handle the events once if any of the events actually happened.
-        # @param event_data [Hash{Symbol=>Array}] the event data grouped by the event name
         # @param state [States::State] the current state of the SpeckleConnector Application
+        # @param events [Hash{Symbol=>Array}] the event data grouped by the event name
         # @return [States::State] the transformed state
         def self.update_state(state, events)
           # Don't do anything if there are no events for this action

speckle_connector/src/actions/events/selection_event_action.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require_relative 'event_action'
+require_relative '../mapper_selection_changed'
+require_relative '../../mapper/category/revit_category'
+require_relative '../../sketchup_model/reader/speckle_entities_reader'
+require_relative '../../sketchup_model/reader/mapper_reader'
+require_relative '../../sketchup_model/query/entity'
+
+module SpeckleConnector
+  module Actions
+    module Events
+      # Update selected speckle objects when the selection changes for mapper tool.
+      class SelectionEventAction < EventAction
+        # @param state [States::State] the current state of Speckle application.
+        # @return [States::State] the new updated state object
+        def self.update_state(state, event_data)
+          return state unless event_data&.any?
+
+          # Get sketchup selection
+          sketchup_selection = state.sketchup_state.sketchup_model.selection
+
+          # Collect and return mapper selection info.
+          # Later we can add more selection info for different scopes.
+          MapperSelectionChanged.new(sketchup_selection).update_state(state)
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/hide_mappings_from_table.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'events/selection_event_action'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Hide entities that selected from mapped elements table.
+    class HideMappingsFromTable < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, data)
+        # Flat entities to clear mappings
+        flat_entities = SketchupModel::Query::Entity.flat_entities(state.sketchup_state.sketchup_model.entities)
+
+        # Collect entity ids to clear mappings
+        entity_ids = data.collect { |_, entities| entities['selectedElements'].collect { |e| e['entityId'] } }.flatten
+
+        # Store speckle state to update with mapped entities.
+        flat_entities.each do |entity|
+          next unless entity_ids.include?(entity.persistent_id)
+
+          if entity.is_a?(Sketchup::ComponentDefinition)
+            entity.instances.each do |instance|
+              instance.hidden = true
+            end
+          end
+          entity.hidden = true
+        end
+
+        Events::SelectionEventAction.update_state(state, { clear: true })
+      end
+    end
+  end
+end

speckle_connector/src/actions/initialize_speckle.rb

@@ -20,9 +20,10 @@ module SpeckleConnector
         speckle_state = States::SpeckleState.new(accounts, observers, {}, {})
         # This should be the only point that `Sketchup_active_model` passed to application state.
         sketchup_state = States::SketchupState.new(Sketchup.active_model)
-        preferences = Preferences.init_preferences(sketchup_state.sketchup_model)
+        preferences = Preferences.read_preferences(sketchup_state.sketchup_model)
         user_state_with_preferences = state.user_state.with_preferences(preferences)
         state = States::State.new(user_state_with_preferences, speckle_state, sketchup_state, false)
+        # This is where we attach observers to related model objects like selection, entities..
         Actions::LoadSketchupModel.update_state(state, sketchup_state.sketchup_model)
       end
 

speckle_connector/src/actions/isolate_mappings_from_table.rb

@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'events/selection_event_action'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Isolate entities that selected from mapped elements table.
+    class IsolateMappingsFromTable < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      # rubocop:disable Metrics/AbcSize
+      # rubocop:disable Metrics/MethodLength
+      # rubocop:disable Metrics/PerceivedComplexity
+      # rubocop:disable Metrics/CyclomaticComplexity
+      def self.update_state(state, data)
+        sketchup_model = state.sketchup_state.sketchup_model
+
+        # Hide all entities first
+        sketchup_model.entities.each do |ent|
+          ent.hidden = true
+        end
+
+        # Flat entities to isolate mappings
+        flat_entities = SketchupModel::Query::Entity.flat_entities(sketchup_model.entities)
+
+        comp_flat_entities = flat_entities.grep(Sketchup::ComponentInstance) + flat_entities.grep(Sketchup::Group) +
+                             flat_entities.grep(Sketchup::ComponentDefinition)
+        face_edge_flat_entities = flat_entities.grep(Sketchup::Face) + flat_entities.grep(Sketchup::Edge)
+
+        # Collect entity ids to clear mappings
+        selected_elements = data.collect { |_, entities| entities['selectedElements'] }.flatten
+
+        comps_or_groups, faces_or_edges = selected_elements.partition do |e|
+          e['entityType'] == 'Component' || e['entityType'] == 'Definition' || e['entityType'] == 'Group'
+        end
+
+        faces_or_edges_ids = faces_or_edges.collect { |e| e['entityId'] }
+
+        face_edge_flat_entities.select { |e| faces_or_edges_ids.include?(e.persistent_id) }.each do |entity|
+          entity.hidden = false
+        end
+
+        comps_or_groups_ids = comps_or_groups.collect { |e| e['entityId'] }
+
+        comp_flat_entities.select { |e| comps_or_groups_ids.include?(e.persistent_id) }.each do |entity|
+          if entity.is_a?(Sketchup::ComponentDefinition)
+            entity.instances.each do |instance|
+              instance.hidden = false
+            end
+          end
+          entity.hidden = false
+        end
+
+        Events::SelectionEventAction.update_state(state, { clear: true })
+      end
+      # rubocop:enable Metrics/AbcSize
+      # rubocop:enable Metrics/MethodLength
+      # rubocop:enable Metrics/PerceivedComplexity
+      # rubocop:enable Metrics/CyclomaticComplexity
+    end
+  end
+end

speckle_connector/src/actions/load_sketchup_model.rb

@@ -2,7 +2,11 @@
 
 require_relative 'action'
 require_relative 'initialize_materials'
+require_relative '../sketchup_model/reader/speckle_entities_reader'
+require_relative '../sketchup_model/reader/mapper_reader'
+require_relative '../preferences/preferences'
 require_relative '../states/state'
+require_relative '../states/sketchup_state'
 require_relative '../constants/observer_constants'
 
 module SpeckleConnector
@@ -15,11 +19,25 @@ module SpeckleConnector
       # @param additional_parameters [Array] parameters that the action takes
       # @return [States::State] the new updated state object
       def self.update_state(state, sketchup_model)
-        # new_model_state = SketchupModel::Readers::ModelReader.read_model(sketchup_model)
-        # new_model_state = InitializeMaterials.update_state(new_model_state)
-        new_sketchup_state = state.sketchup_state.with(:@sketchup_model => sketchup_model)
+        # Init sketchup state again with new model
+        new_sketchup_state = States::SketchupState.new(sketchup_model)
+        sketchup_model.rendering_options['DisplaySectionPlanes'] = true
         new_state = state.with(:@sketchup_state => new_sketchup_state)
+        # Init materials again
         new_state = InitializeMaterials.update_state(new_state)
+
+        # Read speckle entities
+        new_speckle_entities = SketchupModel::Reader::SpeckleEntitiesReader.read(sketchup_model.entities)
+        new_speckle_state = new_state.speckle_state.with_speckle_entities(Immutable::Hash.new(new_speckle_entities))
+        # Read mapped entities
+        new_mapped_entities = SketchupModel::Reader::MapperReader.read_mapped_entities(sketchup_model.entities)
+        new_speckle_state = new_speckle_state.with_mapped_entities(Immutable::Hash.new(new_mapped_entities))
+        new_state = new_state.with_speckle_state(new_speckle_state)
+
+        # Read preferences from database and model.
+        preferences = Preferences.read_preferences(new_state.sketchup_state.sketchup_model)
+        new_user_state = new_state.user_state.with_preferences(preferences)
+        new_state = new_state.with(:@user_state => new_user_state)
         attach_observers(sketchup_model, new_state.speckle_state.observers)
         new_state
       end
@@ -28,8 +46,8 @@ module SpeckleConnector
       # @param sketchup_model [Sketchup::Model] the model to attach observers to
       # @param observers [Hash{Class=>}] the observer objects indexed by their class that will be attached
       def self.attach_observers(sketchup_model, observers)
-        # selection = sketchup_model.selection
-        # selection.add_observer(observers[SELECTION_OBSERVER_NAME])
+        selection = sketchup_model.selection
+        selection.add_observer(observers[SELECTION_OBSERVER])
         # layers = sketchup_model.layers
         # layers.add_observer(observers[LAYERS_OBSERVER_NAME])
         entities = sketchup_model.entities

speckle_connector/src/actions/mapped_entities_updated.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../sketchup_model/reader/mapper_reader'
+
+module SpeckleConnector
+  module Actions
+    # Triggers when mapped entities updated.
+    class MappedEntitiesUpdated < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data = nil)
+        mapped_entities = SketchupModel::Reader::MapperReader
+                          .mapped_entity_details(state.speckle_state.speckle_mapper_state.mapped_entities.values.to_a)
+
+        state.with_mapped_entities_queue(mapped_entities)
+      end
+    end
+  end
+end

speckle_connector/src/actions/mapper_initialized.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../mapper/category/revit_category'
+require_relative '../mapper/category/revit_family_category'
+
+module SpeckleConnector
+  module Actions
+    # Collects mapper selection info.
+    class MapperInitialized < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data)
+        init_parameters = {
+          categories: Mapper::Category::RevitCategory.to_a,
+          familyCategories: Mapper::Category::RevitFamilyCategory.to_a
+        }.freeze
+        state.with_mapper_init_queue(init_parameters)
+      end
+    end
+  end
+end

speckle_connector/src/actions/mapper_selection_changed.rb

@@ -0,0 +1,200 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../mapper/category/revit_category'
+require_relative '../mapper/category/revit_family_category'
+require_relative '../sketchup_model/reader/mapper_reader'
+require_relative '../sketchup_model/reader/speckle_entities_reader'
+require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Collects mapper selection info.
+    class MapperSelectionChanged < Action
+      READER = SketchupModel::Reader
+      DICTIONARY = SketchupModel::Dictionary
+
+      def initialize(selection)
+        super()
+        @selection = selection
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def update_state(state)
+        # Get mapping info from selection.
+        mapping = get_mapping_info(state, @selection)
+
+        state.with_mapper_selection_queue(mapping)
+      end
+
+      def filter_out_levels(selection)
+        selection.reject do |e|
+          DICTIONARY::SpeckleEntityDictionaryHandler
+            .get_attribute(e, :speckle_type) == OBJECTS_BUILTELEMENTS_REVIT_LEVEL
+        end
+      end
+
+      def get_mapping_info(state, selection)
+        source_exist = !state.speckle_state.speckle_mapper_state.mapper_source.nil?
+        selection = filter_out_levels(selection)
+        grouped_by_type = group_by_type(selection)
+
+        supported_entity_count = grouped_by_type.length
+
+        # Return empty method list if there is no supported entity to map.
+        return EMPTY_SELECTION if supported_entity_count == 0
+
+        # Return Direct Shape itself if multiple kinds of element are selected like Edge and Face.
+        # OR single type is equal to only direct shape supports.
+        return multiple_supported_selection_info(selection) if supported_entity_count > 1
+
+        # FIXME: Distinguish selection info according to selection elegantly!!!
+        if grouped_by_type.keys.first == Sketchup::ComponentInstance
+          return component_selection_info(selection, source_exist)
+        end
+
+        return group_selection_info(selection) if grouped_by_type.keys.first == Sketchup::Group
+
+        if supported_entity_count > 1 ||
+           (supported_entity_count == 1 &&
+             MAPPER_DIRECT_SHAPE_SUPPORTED_ENTITY_TYPES.include?(grouped_by_type.keys.first))
+          if source_exist
+            return direct_shape_selection_info_with_source(selection, [])
+          else
+            return direct_shape_selection_info(selection, source_exist)
+          end
+        end
+
+        # Only single type selections remained after this point.
+        return face_selection_info(state, grouped_by_type.values.first) if grouped_by_type.keys.first == Sketchup::Face
+
+        return edge_selection_info(state, grouped_by_type.values.first) if grouped_by_type.keys.first == Sketchup::Edge
+
+        EMPTY_SELECTION
+      end
+
+      MAPPER_SUPPORTED_ENTITY_TYPES = [
+        Sketchup::ComponentInstance,
+        Sketchup::Group,
+        Sketchup::Face,
+        Sketchup::Edge
+      ].freeze
+
+      MAPPER_DIRECT_SHAPE_SUPPORTED_ENTITY_TYPES = [
+        Sketchup::ComponentInstance,
+        Sketchup::Group
+      ].freeze
+
+      EMPTY_SELECTION = {
+        selection: [],
+        mappingMethods: []
+      }.freeze
+
+      def multiple_supported_selection_info(selection)
+        {
+          selection: SketchupModel::Reader::MapperReader.entities_schema_details(selection),
+          mappingMethods: ['Direct Shape']
+        }.freeze
+      end
+
+      def component_selection_info(selection, source_exist)
+        if source_exist
+          {
+            selection: SketchupModel::Reader::MapperReader.entities_schema_details(selection),
+            mappingMethods: ['Direct Shape', 'New Revit Family', 'Family Instance']
+          }.freeze
+        else
+          {
+            selection: SketchupModel::Reader::MapperReader.entities_schema_details(selection),
+            mappingMethods: ['Direct Shape', 'New Revit Family']
+          }.freeze
+        end
+      end
+
+      def group_selection_info(selection)
+        {
+          selection: SketchupModel::Reader::MapperReader.entities_schema_details(selection),
+          mappingMethods: ['Direct Shape']
+        }.freeze
+      end
+
+      def direct_shape_selection_info(selection, source_exist)
+        methods = ['Direct Shape', 'New Revit Family']
+        methods.append('Family Instance') if source_exist
+        {
+          selection: SketchupModel::Reader::MapperReader.entities_schema_details(selection),
+          mappingMethods: methods
+        }.freeze
+      end
+
+      def direct_shape_selection_info_with_default(selection, methods)
+        {
+          selection: SketchupModel::Reader::MapperReader.entities_schema_details(selection),
+          mappingMethods: ['Direct Shape'] + methods
+        }.freeze
+      end
+
+      def direct_shape_selection_info_with_source(filtered_selection, methods)
+        instances = @selection.grep(Sketchup::ComponentInstance)
+        selected_level = instances.find do |i|
+          DICTIONARY::SpeckleEntityDictionaryHandler
+            .get_attribute(i, :speckle_type) == OBJECTS_BUILTELEMENTS_REVIT_LEVEL
+        end
+        selected_level_name = nil
+        if selected_level
+          selected_level_name = DICTIONARY::SpeckleEntityDictionaryHandler.get_attribute(selected_level, :name)
+        end
+        {
+          selection: READER::MapperReader.entities_schema_details(filtered_selection),
+          mappingMethods: ['Direct Shape'] + methods,
+          categories: Mapper::Category::RevitCategory.to_a,
+          selectedLevelName: selected_level_name
+        }.freeze
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      def face_selection_info(state, faces)
+        source_exist = !state.speckle_state.speckle_mapper_state.mapper_source.nil?
+        grouped_by_verticality = faces.group_by { |face| face.normal.perpendicular?(VECTOR_Z) }
+        return direct_shape_selection_info(faces, source_exist) if grouped_by_verticality.length == 2
+
+        if source_exist
+          if grouped_by_verticality.keys.first
+            direct_shape_selection_info_with_source(faces, ['Wall'])
+          else
+            direct_shape_selection_info_with_source(faces, ['Floor'])
+          end
+        else
+          if grouped_by_verticality.keys.first
+            direct_shape_selection_info_with_default(faces, ['Default Wall'])
+          else
+            direct_shape_selection_info_with_default(faces, ['Default Floor'])
+          end
+        end
+      end
+
+      def edge_selection_info(state, edges)
+        source_exist = !state.speckle_state.speckle_mapper_state.mapper_source.nil?
+
+        if source_exist
+          methods = ['Column', 'Beam', 'Pipe', 'Duct']
+          direct_shape_selection_info_with_source(edges, methods)
+        else
+          default_methods = ['Default Column', 'Default Beam', 'Default Pipe', 'Default Duct']
+          direct_shape_selection_info_with_default(edges, default_methods)
+        end
+      end
+
+      def group_by_type_old(selection)
+        selection.group_by(&:class).filter_map do |group|
+          [group.first, group] if MAPPER_SUPPORTED_ENTITY_TYPES.include?(group.first)
+        end.to_h
+      end
+
+      def group_by_type(selection)
+        selection.select { |s| MAPPER_SUPPORTED_ENTITY_TYPES.include?(s.class) }.group_by(&:class)
+      end
+    end
+  end
+end

speckle_connector/src/actions/mapper_source_updated.rb

@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../constants/type_constants'
+require_relative '../mapper/mapper_source'
+require_relative '../speckle_objects/built_elements/revit/revit_element_type'
+
+module SpeckleConnector
+  module Actions
+    # Action to update mapper source.
+    class MapperSourceUpdated < Action
+      def initialize(base, stream_id, commit_id)
+        super()
+        @base = base
+        @stream_id = stream_id
+        @commit_id = commit_id
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def update_state(state)
+        levels = convert_levels(state, @base['@Levels'])
+        types = convert_types(@base['@Types'])
+        family_instances = convert_family_instance_types(@base['@Types'])
+        mapper_source = Mapper::MapperSource.new(@stream_id, @commit_id, levels, types)
+        new_speckle_state = state.speckle_state.with_mapper_source(mapper_source)
+        state = state.with_speckle_state(new_speckle_state)
+
+        state.with_add_queue('mapperSourceUpdated', @stream_id, [
+                               { is_string: false, val: levels.to_json },
+                               { is_string: false, val: types.to_json },
+                               { is_string: false, val: family_instances.to_json }
+                             ])
+      end
+
+      def convert_types(types)
+        types.collect do |type, type_elements|
+          next if type_elements.nil? || !type_elements.is_a?(Array) || type == '__closure'
+
+          type = type[1..-1] if type[0] == '@'
+          elements = type_elements.map do |type_element|
+            SpeckleObjects::BuiltElements::Revit::RevitElementType.to_native(type_element)
+          end
+          elements = elements.group_by { |e| e[:family] }
+          [type, elements]
+        end.compact.to_h
+      end
+
+      def convert_family_instance_types(types)
+        family_instance_types = {}
+        types.each do |type, type_elements|
+          next if type_elements.nil? || !type_elements.is_a?(Array) || type == '__closure'
+
+          # skip type if there is no any revit symbol element type
+          symbol_element_types = type_elements.select do |t|
+            t['speckle_type'] == OBJECTS_BUILTELEMENTS_REVIT_REVITSYMBOLELEMENTTYPE &&
+              t['placementType'] == 'OneLevelBased'
+          end
+          next if symbol_element_types.empty?
+
+          elements = type_elements.map do |type_element|
+            SpeckleObjects::BuiltElements::Revit::RevitElementType.to_native(type_element)
+          end
+          elements = elements.group_by { |e| e[:family] }
+          family_instance_types.merge!(elements)
+        end
+        family_instance_types
+      end
+
+      def convert_levels(state, levels)
+        levels.collect do |level|
+          SpeckleObjects::BuiltElements::Level.to_native(state, level, @stream_id)
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/on_events_action.rb

@@ -4,6 +4,7 @@ require_relative 'action'
 require_relative 'events/app_event_action'
 require_relative 'events/entities_event_action'
 require_relative 'events/model_event_action'
+require_relative 'events/selection_event_action'
 require_relative '../constants/observer_constants'
 
 module SpeckleConnector
@@ -13,11 +14,11 @@ module SpeckleConnector
       RUN_ORDER = {
         APP_OBSERVER => Events::AppEventAction,
         ENTITIES_OBSERVER => Events::EntitiesEventAction,
-        MODEL_OBSERVER => Events::ModelEventAction
+        MODEL_OBSERVER => Events::ModelEventAction,
         # MATERIALS_OBSERVER => Events::MaterialsEventAction,
         # LAYERS_OBSERVER => Events::LayerEventAction,
         # PAGES_OBSERVER => Events::PagesEventAction,
-        # SELECTION_OBSERVER => Events::SelectionEventAction
+        SELECTION_OBSERVER => Events::SelectionEventAction
       }.freeze
 
       def self.update_state(state, events)

speckle_connector/src/actions/receive_objects.rb

@@ -3,29 +3,39 @@
 require_relative 'action'
 require_relative '../convertors/units'
 require_relative '../convertors/to_native'
+require_relative '../convertors/clean_up'
 
 module SpeckleConnector
   module Actions
     # Action to receive objects from Speckle Server.
     class ReceiveObjects < Action
-      def initialize(stream_id, base, stream_name, branch_name, branch_id)
+      # rubocop:disable Metrics/ParameterLists
+      def initialize(stream_id, base, stream_name, branch_name, branch_id, source_app)
         super()
         @stream_id = stream_id
         @base = base
         @stream_name = stream_name
         @branch_name = branch_name
         @branch_id = branch_id
+        @source_app = source_app
       end
+      # rubocop:enable Metrics/ParameterLists
 
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
       def update_state(state)
-        converter = Converters::ToNative.new(state)
+        converter = Converters::ToNative.new(state, @stream_id, @stream_name, @branch_name, @source_app)
         # Have side effects on the sketchup model. It effects directly on the entities by adding new objects.
         start_time = Time.now.to_f
-        converter.receive_commit_object(@base, state.user_state.preferences[:model])
+        state.sketchup_state.sketchup_model.start_operation('Receive Speckle Objects', true)
+        state = converter.receive_commit_object(@base)
+        if state.user_state.model_preferences[:merge_coplanar_faces]
+          Converters::CleanUp.merge_coplanar_faces(converter.converted_faces)
+        end
+        state.sketchup_state.sketchup_model.commit_operation
         elapsed_time = (Time.now.to_f - start_time).round(3)
         puts "==== Converting to Native executed in #{elapsed_time} sec ===="
+        puts "==== Source application is #{@source_app}. ===="
         state.with_add_queue('finishedReceiveInSketchup', @stream_id, [])
       end
     end

speckle_connector/src/actions/select_mappings_from_table.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'events/selection_event_action'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # Select entities that selected from mapped elements table.
+    class SelectMappingsFromTable < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, data)
+        # Clear first selection
+        state.sketchup_state.sketchup_model.selection.clear
+
+        # Flat entities to clear mappings
+        flat_entities = SketchupModel::Query::Entity.flat_entities(state.sketchup_state.sketchup_model.entities)
+
+        # Collect entity ids to clear mappings
+        entity_ids = data.collect { |_, entities| entities['selectedElements'].collect { |e| e['entityId'] } }.flatten
+
+        # Store speckle state to update with mapped entities.
+        flat_entities.each do |entity|
+          next unless entity_ids.include?(entity.persistent_id)
+
+          if entity.is_a?(Sketchup::ComponentDefinition)
+            state.sketchup_state.sketchup_model.selection.add(entity.instances)
+          end
+          state.sketchup_state.sketchup_model.selection.add(entity)
+        end
+
+        Events::SelectionEventAction.update_state(state, { clear: true })
+      end
+    end
+  end
+end

speckle_connector/src/actions/send_selection.rb

@@ -18,13 +18,17 @@ module SpeckleConnector
       # @return [States::State] the new updated state object
       def update_state(state)
         state = DeactivateDiffing.update_state(state, {})
-        converter = Converters::ToSpeckle.new(state)
+        converter = Converters::ToSpeckle.new(state, @stream_id)
         new_speckle_state, base = converter.convert_selection_to_base(state.user_state.preferences)
         id, total_children_count, batches, new_speckle_state = converter.serialize(base, new_speckle_state,
-                                                                                   state.user_state.preferences,
-                                                                                   @stream_id)
+                                                                                   state.user_state.preferences)
         puts("converted #{base.count} objects for stream #{@stream_id}")
-        new_state = state.with_speckle_state(new_speckle_state.with_invalid_streams_queue)
+
+        # This is the place we can send information to UI for diffing check
+        diffing = state.user_state.preferences[:user][:diffing]
+        new_speckle_state = new_speckle_state.with_invalid_streams_queue if diffing
+
+        new_state = state.with_speckle_state(new_speckle_state)
         new_state.with_add_queue('convertedFromSketchup', @stream_id, [
                                    { is_string: false, val: batches },
                                    { is_string: true, val: id },

speckle_connector/src/actions/show_all_entities.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+
+module SpeckleConnector
+  module Actions
+    # Show all entities on the model.
+    class ShowAllEntities < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data)
+        # Show all entities first
+        state.sketchup_state.sketchup_model.entities.each do |ent|
+          ent.hidden = false
+        end
+        state
+      end
+    end
+  end
+end

speckle_connector/src/actions/user_preferences_updated.rb

@@ -18,6 +18,8 @@ module SpeckleConnector
 
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
+      # rubocop:disable Metrics/AbcSize
+      # rubocop:disable Metrics/MethodLength
       def update_state(state)
         # Init sqlite database
         db = Sqlite3::Database.new(SPECKLE_CONFIG_DB_PATH)
@@ -46,8 +48,19 @@ module SpeckleConnector
         user[@preference.to_sym] = @value
         new_preferences = state.user_state.preferences.put(:user, user)
         new_user_state = state.user_state.with_preferences(new_preferences)
+        # This is the place we can send information to UI for diffing check. It is a technical depth!
+        if @preference == 'diffing'
+          new_speckle_state = if @value
+                                state.speckle_state.with_invalid_streams_queue
+                              else
+                                state.speckle_state.with_empty_invalid_streams_queue
+                              end
+          state = state.with_speckle_state(new_speckle_state)
+        end
         state.with_user_state(new_user_state)
       end
+      # rubocop:enable Metrics/AbcSize
+      # rubocop:enable Metrics/MethodLength
     end
   end
 end

speckle_connector/src/app/speckle_connector_app.rb

@@ -32,16 +32,20 @@ module SpeckleConnector
         ui_controller.update_ui(state)
       end
 
+      # Attach observers to application when speckle initialized via menu commands.
+      def add_observer_handler!(observer_handler)
+        @observer_handler = observer_handler
+      end
+
+      # Send messages to HtmlDialog if any.
       def send_messages!
         queue = @state.speckle_state.message_queue
         queue.each_value { |value| ui_controller.user_interfaces[Ui::SPECKLE_UI_ID].dialog.execute_script(value) }
         update_state!(Actions::ClearQueue)
       end
 
-      def add_observer_handler!(observer_handler)
-        @observer_handler = observer_handler
-      end
-
+      # This is the only function application state will be switched by calling upcoming action with it's parameters
+      #  if any.
       def update_state!(action, *parameters)
         old_state = @state
         @state = action.update_state(old_state, *parameters)

speckle_connector/src/commands/apply_mappings.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../actions/apply_mappings'
+
+module SpeckleConnector
+  module Commands
+    # Command to apply mapping for selected entities.
+    class ApplyMappings < Command
+      def _run(data)
+        entities_to_map = data['entitiesToMap']
+        method = data['method']
+        category = data['category']
+        family = data['family']
+        family_type = data['familyType']
+        level = data['level']
+        name = data['name']
+        is_definition = data['isDefinition']
+        action = Actions::ApplyMappings.new(entities_to_map, method, category, family,
+                                            family_type, level, name, is_definition)
+        app.update_state!(action)
+      end
+    end
+  end
+end

speckle_connector/src/commands/clear_mappings.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../actions/clear_mappings'
+
+module SpeckleConnector
+  module Commands
+    # Command to clear mapping for selected entities.
+    class ClearMappings < Command
+      def _run(data)
+        entities_to_map = data['entitiesToClearMap']
+        is_definition = data['isDefinition']
+        action = Actions::ClearMappings.new(entities_to_map, is_definition)
+        app.update_state!(action)
+      end
+    end
+  end
+end

speckle_connector/src/commands/mapper_source_updated.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../actions/mapper_source_updated'
+
+module SpeckleConnector
+  module Commands
+    # Command to update mapper source.
+    class MapperSourceUpdated < Command
+      def _run(data)
+        base = data['base']
+        stream_id = data['stream_id']
+        commit_id = data['commit_id']
+        action = Actions::MapperSourceUpdated.new(base, stream_id, commit_id)
+        app.update_state!(action)
+      end
+    end
+  end
+end

speckle_connector/src/commands/receive_objects.rb

@@ -13,7 +13,8 @@ module SpeckleConnector
         branch_name = data['branch_name']
         branch_id = data['branch_id']
         stream_name = data['stream_name']
-        action = Actions::ReceiveObjects.new(stream_id, base, stream_name, branch_name, branch_id)
+        source_app = data['source_app']
+        action = Actions::ReceiveObjects.new(stream_id, base, stream_name, branch_name, branch_id, source_app)
         app.update_state!(action)
       end
     end

speckle_connector/src/commands/reset_window_location.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../states/initial_state'
+require_relative '../ui/vue_view'
+require_relative '../actions/initialize_speckle'
+require_relative '../observers/factory'
+
+module SpeckleConnector
+  module Commands
+    # Command to reset Speckle UI window location onto center of SketchUp window.
+    class ResetWindowLocation < Command
+
+      private
+
+      def _run
+        app = self.app
+        vue_view = app.ui_controller.user_interfaces[Ui::SPECKLE_UI_ID]
+        if vue_view
+          vue_view.dialog.reset_dialog_location
+        else
+          puts "Speckle UI didn't initialized!"
+        end
+      end
+    end
+  end
+end

speckle_connector/src/commands/speckle_menu_commands.rb

@@ -3,6 +3,7 @@
 require_relative 'menu_command_handler'
 require_relative 'action_command'
 require_relative 'initialize_speckle'
+require_relative 'reset_window_location'
 require_relative '../actions/one_click_send'
 
 module SpeckleConnector
@@ -10,6 +11,7 @@ module SpeckleConnector
     # Speckle menu commands that adds them to Sketchup menu and toolbar.
     class SpeckleMenuCommands
       CMD_INITIALIZE_SPECKLE = :initialize_speckle
+      CMD_RESET_WINDOW_LOCATION_SPECKLE = :reset_window_location_speckle
       CMD_SEND_TO_SPECKLE = :send_to_speckle
       CMD_RECEIVE_FROM_SPECKLE = :receive_from_speckle
 
@@ -26,6 +28,9 @@ module SpeckleConnector
         commands.add_to_menu!(CMD_INITIALIZE_SPECKLE, speckle_menu)
         commands.add_to_toolbar!(CMD_INITIALIZE_SPECKLE, speckle_toolbar)
 
+        commands[CMD_RESET_WINDOW_LOCATION_SPECKLE] = reset_window_location_command(app)
+        commands.add_to_menu!(CMD_RESET_WINDOW_LOCATION_SPECKLE, speckle_menu)
+
         # commands[CMD_SEND_TO_SPECKLE] = send_command(app)
         # commands.add_to_menu!(CMD_SEND_TO_SPECKLE, speckle_menu)
         # commands.add_to_toolbar!(CMD_SEND_TO_SPECKLE, speckle_toolbar)
@@ -42,6 +47,17 @@ module SpeckleConnector
         cmd
       end
 
+      def self.reset_window_location_command(app)
+        cmd = MenuCommandHandler.sketchup_command(
+          ResetWindowLocation.new(app), 'Reset Window Location'
+        )
+        cmd.tooltip = 'Bring Speckle window onto center of SketchUp window'
+        cmd.status_bar_text = 'Bring Speckle window onto center of SketchUp window'
+        cmd.small_icon  = '../../img/s2logo.png'
+        cmd.large_icon  = '../../img/s2logo.png'
+        cmd
+      end
+
       def self.send_command(app)
         cmd = MenuCommandHandler.sketchup_command(
           ActionCommand.new(app, Actions::OneClickSend), 'Send to Speckle'

speckle_connector/src/constants/dict_constants.rb

@@ -2,10 +2,14 @@
 
 module SpeckleConnector
   SPECKLE_BASE_OBJECT = 'Speckle_Base_Object'
+  SPECKLE_MAPPING_TOOL_SCHEMA = 'Speckle_Mapping_Tool_Schema'
+  SPECKLE_SCHEMA = 'Speckle_Schema'
+
   SPECKLE_ID = 'speckle_id'
   SPECKLE_TYPE = 'speckle_type'
   APPLICATION_ID = 'application_id'
   TOTAL_CHILDREN_COUNT = 'total_children_count'
+  CHILDREN = 'children'
   PARENT = 'parent'
   VALID_STREAM_IDS = 'valid_stream_ids'
   INVALID_STREAM_IDS = 'invalid_stream_ids'

speckle_connector/src/constants/geo_constants.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  VECTOR_Z = Geom::Vector3d.new(0, 0, 1)
+end

speckle_connector/src/constants/observer_constants.rb

@@ -4,4 +4,5 @@ module SpeckleConnector
   APP_OBSERVER = 'SpeckleConnector::Observers::AppObserver'
   ENTITIES_OBSERVER = 'SpeckleConnector::Observers::EntitiesObserver'
   MODEL_OBSERVER = 'SpeckleConnector::Observers::ModelObserver'
+  SELECTION_OBSERVER = 'SpeckleConnector::Observers::SelectionObserver'
 end

speckle_connector/src/constants/path_constants.rb

@@ -14,7 +14,7 @@ module SpeckleConnector
                            path = ENV.fetch('APPDATA')
                            Pathname.new(File.join(path, 'Speckle')).cleanpath.to_s
                          when OS_MAC
-                           File.join(Dir.home, 'Library/Application Support/Speckle')
+                           File.join(Dir.home, '.config/Speckle')
                          else
                            raise 'Speckle could not determine your Appdata path'
                          end

speckle_connector/src/constants/pref_constants.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require_relative '../speckle_objects/geometry/length'
+
+module SpeckleConnector
+  COMBINE_FACES_BY_MATERIAL = :combine_faces_by_material
+  INCLUDE_ENTITY_ATTRIBUTES = :include_entity_attributes
+  INCLUDE_FACE_ENTITY_ATTRIBUTES = :include_face_entity_attributes
+  INCLUDE_EDGE_ENTITY_ATTRIBUTES = :include_edge_entity_attributes
+  INCLUDE_GROUP_ENTITY_ATTRIBUTES = :include_group_entity_attributes
+  INCLUDE_COMPONENT_ENTITY_ATTRIBUTES = :include_component_entity_attributes
+  MERGE_COPLANAR_FACES = :merge_coplanar_faces
+
+  ENTITY_KEYS_FOR_INCLUDING_ATTRIBUTES = {
+    Sketchup::ComponentInstance => INCLUDE_COMPONENT_ENTITY_ATTRIBUTES,
+    Sketchup::Group => INCLUDE_GROUP_ENTITY_ATTRIBUTES,
+    Sketchup::Face => INCLUDE_FACE_ENTITY_ATTRIBUTES,
+    Sketchup::Face => INCLUDE_EDGE_ENTITY_ATTRIBUTES
+  }.freeze
+
+  LEVEL_SHIFT_VALUE = SpeckleObjects::Geometry.length_to_native(1.5, 'm')
+
+  DEFAULT_MODEL_PREFERENCES = {
+    COMBINE_FACES_BY_MATERIAL => true,
+    INCLUDE_ENTITY_ATTRIBUTES => true,
+    INCLUDE_FACE_ENTITY_ATTRIBUTES => true,
+    INCLUDE_EDGE_ENTITY_ATTRIBUTES => true,
+    INCLUDE_GROUP_ENTITY_ATTRIBUTES => true,
+    INCLUDE_COMPONENT_ENTITY_ATTRIBUTES => true,
+    MERGE_COPLANAR_FACES => true
+  }.freeze
+end

speckle_connector/src/constants/type_constants.rb

@@ -2,4 +2,40 @@
 
 module SpeckleConnector
   BASE_OBJECT = 'Base'
+
+  OBJECTS_GIS_POLYGONELEMENT = 'Objects.GIS.PolygonElement'
+  OBJECTS_GIS_LINEELEMENT = 'Objects.GIS.LineElement'
+
+  OBJECTS_BUILTELEMENTS_VIEW3D = 'Objects.BuiltElements.View:Objects.BuiltElements.View3D'
+  OBJECTS_BUILTELEMENTS_NETWORK = 'Objects.BuiltElements.Network'
+  OBJECTS_BUILTELEMENTS_REVIT_LEVEL = 'Objects.BuiltElements.Level:Objects.BuiltElements.Revit.RevitLevel'
+  OBJECTS_BUILTELEMENTS_DEFAULT_FLOOR = 'Objects.BuiltElements.Floor'
+  OBJECTS_BUILTELEMENTS_REVIT_FLOOR = 'Objects.BuiltElements.Floor:Objects.BuiltElements.Revit.RevitFloor'
+  OBJECTS_BUILTELEMENTS_DEFAULT_WALL = 'Objects.BuiltElements.Wall'
+  OBJECTS_BUILTELEMENTS_REVIT_WALL = 'Objects.BuiltElements.Wall:Objects.BuiltElements.Revit.RevitWall'
+  OBJECTS_BUILTELEMENTS_REVIT_DIRECTSHAPE = 'Objects.BuiltElements.Revit.DirectShape'
+  OBJECTS_BUILTELEMENTS_REVIT_FAMILY_INSTANCE = 'Objects.BuiltElements.Revit.FamilyInstance'
+  OBJECTS_BUILTELEMENTS_REVIT_PARAMETER = 'Objects.BuiltElements.Revit.Parameter'
+  OBJECTS_BUILTELEMENTS_REVIT_REVITELEMENTTYPE = 'Objects.BuiltElements.Revit.RevitElementType'
+  OBJECTS_BUILTELEMENTS_REVIT_REVITSYMBOLELEMENTTYPE = 'Objects.BuiltElements.Revit.RevitElementType:Objects.BuiltElements.Revit.RevitSymbolElementType'
+
+  OBJECTS_GEOMETRY_LINE = 'Objects.Geometry.Line'
+  OBJECTS_GEOMETRY_POLYLINE = 'Objects.Geometry.Polyline'
+  OBJECTS_GEOMETRY_POLYCURVE = 'Objects.Geometry.Polycurve'
+  OBJECTS_GEOMETRY_ARC = 'Objects.Geometry.Arc'
+  OBJECTS_GEOMETRY_CIRCLE = 'Objects.Geometry.Circle'
+  OBJECTS_GEOMETRY_MESH = 'Objects.Geometry.Mesh'
+  OBJECTS_GEOMETRY_BREP = 'Objects.Geometry.Brep'
+
+  OBJECTS_OTHER_BLOCKINSTANCE = 'Objects.Other.BlockInstance'
+  OBJECTS_OTHER_BLOCKINSTANCE_FULL = 'Objects.Other.Instance:Objects.Other.BlockInstance'
+  OBJECTS_OTHER_INSTANCE = 'Objects.Other.Instance:Objects.Other.Instance'
+  OBJECTS_OTHER_REVIT_REVITINSTANCE = 'Objects.Other.Revit.RevitInstance'
+  OBJECTS_OTHER_BLOCKDEFINITION = 'Objects.Other.BlockDefinition'
+  OBJECTS_OTHER_RENDERMATERIAL = 'Objects.Other.RenderMaterial'
+  OBJECTS_OTHER_DISPLAYSTYLE = 'Objects.Other.DisplayStyle'
+
+  SPECKLE_CORE_MODELS_COLLECTION = 'Speckle.Core.Models.Collection'
+  SPECKLE_CORE_MODELS_COLLECTION_RASTER_LAYER = 'Speckle.Core.Models.Collection:Objects.GIS.RasterLayer'
+  SPECKLE_CORE_MODELS_COLLECTION_VECTOR_LAYER = 'Speckle.Core.Models.Collection:Objects.GIS.VectorLayer'
 end

speckle_connector/src/convertors/base_object_serializer.rb

@@ -5,6 +5,7 @@ require 'securerandom'
 # rubocop:enable SketchupPerformance/OpenSSL
 require 'digest'
 require_relative 'converter'
+require_relative '../speckle_entities/speckle_entity'
 require_relative '../relations/many_to_one_relation'
 
 module SpeckleConnector
@@ -115,13 +116,9 @@ module SpeckleConnector
         # 10. Save object string if detached
         @objects[id] = traversed_base if is_detached
 
-        if @preferences[:user][:diffing] && !entities.nil?
+        if @preferences[:user][:register_speckle_entity] && !entities.nil?
           entities.uniq.each do |entity|
-            speckle_entity = if speckle_state.speckle_entities.keys.include?(entity.persistent_id)
-                               speckle_state.speckle_entities[entity.persistent_id].with_valid_stream_id(stream_id)
-                             else
-                               SpeckleEntities.with_converted(entity, traversed_base, stream_id)
-                             end
+            speckle_entity = create_or_update_speckle_entity(entity, id, traversed_base)
             @speckle_state = speckle_state.with_speckle_entity(speckle_entity)
           end
         end
@@ -231,6 +228,8 @@ module SpeckleConnector
 
         return false unless is_array && value.length == 2
 
+        return false if value[1].nil?
+
         value[1].all? { |v| v.is_a?(Sketchup::Entity) }
       end
 
@@ -345,6 +344,23 @@ module SpeckleConnector
 
         speckle_state.speckle_entities[entity.persistent_id].valid_stream_ids.include?(stream_id)
       end
+
+      # Creates or updates speckle entity.
+      # If speckle entity exist in state, creates new one by updating old one.
+      # Else creates new one
+      # @return [SpeckleEntity] speckle entity that collects both speckle and sketchup information.
+      def create_or_update_speckle_entity(entity, id, traversed_base)
+        if speckle_state.speckle_entities.keys.include?(entity.persistent_id)
+          speckle_state.speckle_entities[entity.persistent_id].with_valid_stream_id(stream_id)
+        else
+          children = traversed_base[:__closure].nil? ? {} : traversed_base[:__closure]
+          speckle_entity = SpeckleEntities::SpeckleEntity.new(entity, id, entity.persistent_id,
+                                                              traversed_base[:speckle_type],
+                                                              children.keys, [stream_id])
+          speckle_entity.write_initial_base_data
+          speckle_entity
+        end
+      end
     end
   end
 end

speckle_connector/src/convertors/clean_up.rb

@@ -11,12 +11,36 @@ module SpeckleConnector
       # @param entities [Sketchup::Entities] entities to remove edges between that make entities coplanar.
       # @note Merging coplanar faces idea originated from [CleanUp](https://github.com/thomthom/cleanup) plugin
       # which is developed by [Thomas Thomassen](https://github.com/thomthom).
-      def self.merge_coplanar_faces(entities)
+      def self.merge_coplanar_entities(entities)
         edges = []
         faces = entities.collect { |entity| entity if entity.is_a? Sketchup::Face }.compact
+        faces = merged_faces(faces)
         faces.each { |face| face.edges.each { |edge| edges << edge } }
         edges.uniq!
         edges.each { |edge| remove_edge_have_coplanar_faces(edge, faces, false) }
+        # Remove remaining orphan edges
+        edges.reject(&:deleted?).select { |edge| edge.faces.empty? }.each(&:erase!)
+        merged_faces(faces)
+      end
+
+      def self.merge_coplanar_faces(faces)
+        edges = []
+        faces = faces.reject(&:deleted?)
+
+        faces.each { |face| face.edges.each { |edge| edges << edge } }
+
+        edges.uniq!
+
+        edges.each { |edge| remove_edge_have_coplanar_faces(edge) }
+
+        # Remove remaining orphan edges
+        # edges.reject(&:deleted?).select { |edge| edge.faces.empty? }.each(&:erase!)
+
+        merged_faces(faces)
+      end
+
+      def self.merged_faces(faces)
+        faces.reject(&:deleted?)
       end
 
       # Detect edges to remove by checking following controls respectively;
@@ -28,43 +52,34 @@ module SpeckleConnector
       #  - Whether UV texture map is aligned between faces or not.
       #  - Finally, if faces are coplanar by correcting these checks, then removes edge from Sketchup.active_model.
       # @param edge [Sketchup::Edge] edge to check.
-      # @param faces [Array<Sketchup::Face>] scoped faces to check 'edge.faces' both (first and second)
-      #  belongs to this faces or not. If any of this faces does not involve this scoped faces, then do not delete.
       # @param ignore_materials [Boolean] whether ignore materials or not.
       # Returns true if the given edge separating two coplanar faces.
       # Return false otherwise.
-      # rubocop:disable Metrics/AbcSize
-      def self.remove_edge_have_coplanar_faces(edge, faces, ignore_materials)
+      def self.remove_edge_have_coplanar_faces(edge)
         return false unless edge.valid? && edge.is_a?(Sketchup::Edge)
         return false unless edge.faces.size == 2
 
-        # Check scoped faces have this edges
-        if edge.faces.size == 2
-          is_first = faces.include?(edge.faces[0])
-          is_second = faces.include?(edge.faces[1])
-          return false unless is_first && is_second
-        end
-
         face_1, face_2 = edge.faces
 
-        return false if face_duplicate?(face_1, face_2)
-        # Check for troublesome faces which might lead to missing geometry if merged.
-        return false unless edge_safe_to_merge?(edge)
+        begin
+          return false unless face_1.normal.samedirection?(face_2.normal)
+
+          return false if face_duplicate?(face_1, face_2)
+          # Check for troublesome faces which might lead to missing geometry if merged.
+          return false unless edge_safe_to_merge?(edge)
 
-        # Check materials match.
-        unless ignore_materials
           return false unless (face_1.material == face_2.material) && (face_1.back_material == face_2.back_material)
 
-          # Verify UV mapping match.
-          return false if !face_1.material.nil? && !continuous_uv?(face_1, face_2, edge) && face_1.material.texture.nil?
-        end
-        # Check faces are coplanar or not.
-        return false unless faces_coplanar?(face_1, face_2)
+          # Check faces are coplanar or not.
+          return false unless faces_coplanar?(face_1, face_2)
 
-        edge.erase!
-        true
+          edge.erase!
+          true
+        rescue StandardError => e
+          puts "Failed to merge coplanar faces by removing edge with error: #{e}"
+          false
+        end
       end
-      # rubocop:enable Metrics/AbcSize
 
       # Determines if two faces are overlapped.
       def self.face_duplicate?(face_1, face_2, overlapping: false)

speckle_connector/src/convertors/converter.rb

@@ -4,18 +4,30 @@ module SpeckleConnector
   module Converters
     # Helper class to convert geometries between server and Sketchup.
     class Converter
+      # @return [States::State] the current state of the {SpeckleConnector::App}
+      attr_reader :state
+
+      # @return [States::SpeckleState] the current speckle state of the {States::State}
+      attr_reader :speckle_state
+
       # @return [Sketchup::Model] active sketchup model.
       attr_reader :sketchup_model
 
+      # @return [String] stream id that conversion happening with it
+      attr_reader :stream_id
+
       # @return [String] speckle units
       attr_reader :units
 
       attr_accessor :definitions
 
-      # @param sketchup_state [States::SketchupState] the current sketchup state of the {States::State}
-      def initialize(sketchup_state)
-        @sketchup_model = sketchup_state.sketchup_model
-        su_unit = sketchup_state.length_units
+      # @param state [States::State] the current state of the {SpeckleConnector::App}
+      def initialize(state, stream_id)
+        @state = state
+        @speckle_state = state.speckle_state
+        @sketchup_model = state.sketchup_state.sketchup_model
+        @stream_id = stream_id
+        su_unit = state.sketchup_state.length_units
         @units =  Converters::SKETCHUP_UNITS[su_unit]
         @definitions = {}
       end

speckle_connector/src/convertors/to_native.rb

@@ -1,45 +1,252 @@
 # frozen_string_literal: true
 
 require_relative 'converter'
+require_relative '../constants/type_constants'
+require_relative '../speckle_entities/speckle_entity'
+require_relative '../speckle_objects/gis/polygon_element'
+require_relative '../speckle_objects/gis/line_element'
 require_relative '../speckle_objects/other/transform'
 require_relative '../speckle_objects/other/render_material'
 require_relative '../speckle_objects/other/block_definition'
 require_relative '../speckle_objects/other/block_instance'
+require_relative '../speckle_objects/other/display_value'
+require_relative '../speckle_objects/revit/revit_instance'
 require_relative '../speckle_objects/geometry/point'
 require_relative '../speckle_objects/geometry/line'
+require_relative '../speckle_objects/geometry/polycurve'
+require_relative '../speckle_objects/geometry/arc'
+require_relative '../speckle_objects/geometry/circle'
 require_relative '../speckle_objects/geometry/mesh'
+require_relative '../speckle_objects/built_elements/view3d'
+require_relative '../speckle_objects/built_elements/network'
+require_relative '../speckle_objects/speckle/core/models/collection'
+require_relative '../speckle_objects/speckle/core/models/gis_layer_collection'
+require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
 
 module SpeckleConnector
   module Converters
     # Converts sketchup entities to speckle objects.
+    # rubocop:disable Metrics/ClassLength
     class ToNative < Converter
+      # @return [States::SpeckleState] the current speckle state of the {States::State}
+      attr_accessor :speckle_state
+
+      # @return [String] source application of received object that will be converted to native
+      attr_reader :source_app
+
+      attr_reader :converted_faces
+
+      def initialize(state, stream_id, stream_name, branch_name, source_app)
+        super(state, stream_id)
+        @stream_name = stream_name
+        @branch_name = branch_name
+        @source_app = source_app.downcase
+        @converted_faces = []
+      end
+
       # Module aliases
       GEOMETRY = SpeckleObjects::Geometry
       OTHER = SpeckleObjects::Other
+      REVIT = SpeckleObjects::Revit
+      BUILTELEMENTS = SpeckleObjects::BuiltElements
+      GIS = SpeckleObjects::GIS
 
       # Class aliases
       POINT = GEOMETRY::Point
       LINE = GEOMETRY::Line
+      POLYCURVE = GEOMETRY::Polycurve
+      ARC = GEOMETRY::Arc
+      CIRCLE = GEOMETRY::Circle
       MESH = GEOMETRY::Mesh
       BLOCK_DEFINITION = OTHER::BlockDefinition
       BLOCK_INSTANCE = OTHER::BlockInstance
+      REVIT_INSTANCE = REVIT::Other::RevitInstance
+      REVIT_WALL = BUILTELEMENTS::RevitWall
+      RENDER_MATERIAL = OTHER::RenderMaterial
+      DISPLAY_VALUE = OTHER::DisplayValue
+      VIEW3D = BUILTELEMENTS::View3d
+      POLYGON_ELEMENT = GIS::PolygonElement
+      LINE_ELEMENT = GIS::LineElement
+      COLLECTION = SpeckleObjects::Speckle::Core::Models::Collection
+      GIS_LAYER_COLLECTION = SpeckleObjects::Speckle::Core::Models::GisLayerCollection
 
       BASE_OBJECT_PROPS = %w[applicationId id speckle_type totalChildrenCount].freeze
       CONVERTABLE_SPECKLE_TYPES = %w[
         Objects.Geometry.Line
         Objects.Geometry.Polyline
+        Objects.Geometry.Polycurve
+        Objects.Geometry.Arc
+        Objects.Geometry.Circle
         Objects.Geometry.Mesh
         Objects.Geometry.Brep
         Objects.Other.BlockInstance
+        Objects.Other.Revit.RevitInstance
         Objects.Other.BlockDefinition
         Objects.Other.RenderMaterial
+        Objects.Other.Instance:Objects.Other.BlockInstance
+        Objects.BuiltElements.View:Objects.BuiltElements.View3D
+        Objects.BuiltElements.Wall:Objects.BuiltElements.Revit.RevitWall
+        Objects.BuiltElements.Network
+        Objects.GIS.PolygonElement
+        Objects.GIS.LineElement
+        Speckle.Core.Models.Collection
+        Speckle.Core.Models.Collection:Objects.GIS.RasterLayer
+        Speckle.Core.Models.Collection:Objects.GIS.VectorLayer
       ].freeze
 
-      def initialize(state)
-        super(state.sketchup_state)
+      def from_revit
+        @from_revit ||= source_app.include?('revit')
       end
 
-      def can_convert_to_native(obj)
+      def from_rhino
+        @from_rhino ||= source_app.include?('rhino')
+      end
+
+      def from_sketchup
+        @from_sketchup ||= source_app.include?('sketchup')
+      end
+
+      def from_qgis
+        @from_qgis ||= source_app.include?('qgis')
+      end
+
+      # ReceiveObjects action call this method by giving everything that comes from server.
+      # Upcoming object is a referencedObject of selected commit to receive.
+      # UI is responsible currently to fetch objects from ObjectLoader module by calling getAndConstruct method.
+      # @param obj [Object] speckle commit object.
+      def receive_commit_object(obj)
+        unless from_revit
+          # Create layers and it's folders from layers relation on the model collection.
+          SpeckleObjects::Relations::Layers.to_native(obj, source_app, sketchup_model)
+        end
+
+        # By default entities to fill is sketchup model's entities.
+        @entities_to_fill = sketchup_model.entities
+
+        # Navigate to branch entities if commit doesn't come from sketchup
+        unless from_sketchup
+          @branch_definition = branch_definition
+          @entities_to_fill = @branch_definition.entities
+        end
+
+        default_commit_layer = sketchup_model.layers.layers.find { |layer| layer.display_name == '@Untagged' }
+
+        traverse_commit_object(obj, default_commit_layer, @entities_to_fill)
+        create_levels_from_section_planes
+        check_hiding_layers_needed
+        try_create_instance
+        @state
+      end
+
+      # Creating instance from @branch_definition only available for non-sketchup commits since we wrap commits
+      # under instance.
+      # There is also another use case that maybe definition is exist in file but user might be deleted it before.
+      # If this is the case we can add instance by checking number of instances.
+      # rubocop:disable Style/GuardClause
+      def try_create_instance
+        if !from_sketchup && (!@is_update_commit || @branch_definition.instances.empty?)
+          instance = sketchup_model.entities.add_instance(@branch_definition, Geom::Transformation.new)
+          BLOCK_INSTANCE.align_instance_axes(instance) if from_qgis
+        end
+      end
+      # rubocop:enable Style/GuardClause
+
+      def levels_layer
+        @levels_layer ||= sketchup_model.layers.add('Levels')
+      end
+
+      def clear_levels
+        instances = @entities_to_fill.grep(Sketchup::ComponentInstance)
+        instances.each do |instance|
+          speckle_type = instance.get_attribute(SPECKLE_BASE_OBJECT, 'speckle_type')
+          next if speckle_type.nil?
+
+          sketchup_model.definitions.remove(instance.definition) if speckle_type == OBJECTS_BUILTELEMENTS_REVIT_LEVEL
+        end
+      end
+
+      # Create levels from section planes that already created for this commit object.
+      # rubocop:disable Metrics/AbcSize
+      # rubocop:disable Metrics/MethodLength
+      def create_levels_from_section_planes
+        clear_levels if @is_update_commit
+        return unless from_revit
+
+        section_planes = @entities_to_fill.grep(Sketchup::SectionPlane)
+        bbox = @entities_to_fill.parent.bounds
+        c_1 = bbox.corner(0)
+        c_2 = bbox.corner(1)
+        c_3 = bbox.corner(3)
+        c_4 = bbox.corner(2)
+        section_planes.each do |section_plane|
+          level_name = "#{@definition_name}-#{section_plane.name}"
+          definition = sketchup_model.definitions.add(level_name)
+          instance = @entities_to_fill.add_instance(definition, Geom::Transformation.new)
+          att = section_plane.attribute_dictionary(SPECKLE_BASE_OBJECT).to_h
+          SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.set_hash(instance, att)
+          elevation = section_plane.bounds.center.z
+          c1_e = Geom::Point3d.new(c_1.x, c_1.y, elevation - LEVEL_SHIFT_VALUE)
+          c2_e = Geom::Point3d.new(c_2.x, c_2.y, elevation - LEVEL_SHIFT_VALUE)
+          c3_e = Geom::Point3d.new(c_3.x, c_3.y, elevation - LEVEL_SHIFT_VALUE)
+          c4_e = Geom::Point3d.new(c_4.x, c_4.y, elevation - LEVEL_SHIFT_VALUE)
+          cline_1 = definition.entities.add_cline(c1_e, c2_e)
+          cline_2 = definition.entities.add_cline(c2_e, c3_e)
+          cline_3 = definition.entities.add_cline(c3_e, c4_e)
+          cline_4 = definition.entities.add_cline(c4_e, c1_e)
+          text = definition.entities.add_text(" #{section_plane.name}", c1_e)
+          [cline_1, cline_2, cline_3, cline_4, text, definition].each { |o| o.layer = levels_layer }
+        end
+      end
+      # rubocop:enable Metrics/AbcSize
+      # rubocop:enable Metrics/MethodLength
+
+      # @return [Sketchup::ComponentDefinition] branch definition to fill objects in it.
+      def branch_definition
+        @definition_name = "#{@branch_name}-#{@stream_name}"
+        definition = sketchup_model.definitions.find { |d| d.name == @definition_name }
+        @is_update_commit = !definition.nil?
+        definition = sketchup_model.definitions.add(@definition_name) if definition.nil?
+        definition
+      end
+
+      def entities_to_fill(_obj)
+        return sketchup_model.entities unless from_revit
+
+        @definition_name = "#{@branch_name}-#{@stream_name}"
+        definition = sketchup_model.definitions.find { |d| d.name == @definition_name }
+        if definition.nil?
+          definition = sketchup_model.definitions.add(@definition_name)
+          sketchup_model.entities.add_instance(definition, Geom::Transformation.new)
+        end
+        definition
+      end
+
+      LAYERS_WILL_BE_HIDDEN = [
+        'Rooms',
+        'Mass',
+        'Mass Floor',
+        'Grid',
+        'Shaft Openings'
+      ].freeze
+
+      def check_hiding_layers_needed
+        return unless from_revit
+
+        sketchup_model.layers.each do |layer|
+          if LAYERS_WILL_BE_HIDDEN.any? { |layer_name| layer.display_name.include?(layer_name) }
+            layer.visible = false
+            sketchup_model.pages.each { |page| page.update(PAGE_USE_LAYER_VISIBILITY) }
+          end
+        end
+      end
+
+      # Conditions for converting speckle object to native sketchup entity:
+      #  1- `obj` is a hash
+      #  2- `obj` has a property as 'speckle_type'
+      #  3- `obj` is a convertable 'speckle_type' which sketchup supports
+      # @param obj [Object] candidate object to convert from speckle to sketchup.
+      # @return [Boolean] whether object is convertable or not.
+      def convertible_to_native?(obj)
         return false unless obj.is_a?(Hash) && obj.key?('speckle_type')
 
         CONVERTABLE_SPECKLE_TYPES.include?(obj['speckle_type'])
@@ -49,115 +256,14 @@ module SpeckleConnector
         ['Objects.BuiltElements.Revit.Parameter'].include?(obj['speckle_type'])
       end
 
-      # @param obj [Object] speckle commit object.
-      def receive_commit_object(obj, model_preferences)
-        # First create layers on the sketchup before starting traversing
-        filtered_layer_containers = obj.keys.filter_map { |key| key if key.start_with?('@') && key != '@Named Views' }
-        create_layers(filtered_layer_containers, sketchup_model.layers)
-        create_views(obj.filter_map { |key, value| value if key == '@Named Views' }, sketchup_model)
-        # Define default commit layer which is the fallback
-        default_commit_layer = sketchup_model.layers.layers.find { |layer| layer.display_name == '@Untagged' }
-        traverse_commit_object(obj, sketchup_model.layers, default_commit_layer, model_preferences)
-      end
-
-      # Create actual Sketchup layers from layer_paths that taken from Speckle base object.
-      # @param layer_paths [Array<String>] layer paths to decompose it to folders and it's layers.
-      # @param folder [Sketchup::Layers, Sketchup::LayerFolder] folder to create folders and layers under it.
-      def create_layers(layer_paths, folder)
-        # Strip leading '@'
-        layers_with_folders = layer_paths.map { |layer| layer[1..-1] }
-        # Split layer_paths according to having parent folder or not.
-        layers_with_head_folder, headless_layers = layers_with_folders.partition { |layer| layer.include?('::') }
-        # Create array of array that split with '::'
-        folder_layer_arrays = layers_with_head_folder.collect { |folder_layer| folder_layer.split('::') }
-        # Add headless layers into `Sketchup.active_model.layers`
-        create_headless_layers(headless_layers, folder)
-        # Create layers that have parent folder(s)- this method is recursive until all tree is created.
-        create_folder_layers(folder_layer_arrays, folder)
-      end
-
-      # @param views [Array] views.
-      # @param sketchup_model [Sketchup::Model] active sketchup model.
-      # rubocop:disable Metrics/AbcSize
-      def create_views(views, sketchup_model)
-        return if views.empty?
-
-        views.first.each do |view|
-          origin = view['origin']
-          target = view['target']
-          origin = SpeckleObjects::Geometry::Point.to_native(origin['x'], origin['y'], origin['z'], origin['units'])
-          target = SpeckleObjects::Geometry::Point.to_native(target['x'], target['y'], target['z'], target['units'])
-          # Set camera position before creating scene on it.
-          my_camera = Sketchup::Camera.new(origin, target, [0, 0, 1], !view['isOrthogonal'], view['lens'])
-          sketchup_model.active_view.camera = my_camera
-          sketchup_model.pages.add(view['name'])
-          page = sketchup_model.pages[view['name']]
-          set_page_update_properties(page, view['update_properties'])
-          set_rendering_options(page.rendering_options, view['rendering_options'])
-        end
-      end
-      # rubocop:enable Metrics/AbcSize
-
-      # @param page [Sketchup::Page] scene to update -update properties-
-      def set_page_update_properties(page, update_properties)
-        update_properties.each do |prop, value|
-          page.instance_variable_set(:"@#{prop}", value)
-        end
-      end
-
-      # @param rendering_options [Sketchup::RenderingOptions] rendering options of scene (page)
-      def set_rendering_options(rendering_options, speckle_rendering_options)
-        speckle_rendering_options.each do |prop, value|
-          next if rendering_options[prop].nil?
-
-          rendering_options[prop] = if value.is_a?(Hash)
-                                      SpeckleObjects::Others::Color.to_native(value)
-                                    else
-                                      value
-                                    end
-        end
-      end
-
-      # @param headless_layers [Array<String>] headless layer names.
-      # @param folder [Sketchup::Layers, Sketchup::LayerFolder] layer folder to create commit layers under it.
-      def create_headless_layers(headless_layers, folder)
-        headless_layers.each do |layer_name|
-          # Add layer first to the layers object of sketchup model.
-          layer = sketchup_model.layers.add(layer_name)
-          folder.add_layer(layer) unless folder.layers.any? { |l| l.display_name == layer_name }
-        end
-      end
-
-      # Create layers with it's parent folders.
-      # @param folder [Sketchup::LayerFolder] layer folder to create commit layers under it.
-      def create_folder_layers(folder_layer_arrays, folder)
-        folder_layer_arrays.each do |folder_layer_array|
-          create_folder_layer(folder_layer_array, folder)
-        end
-      end
-
-      # Create layers that have parent folder(s)- this method is recursive (self-caller) until all tree is created.
-      def create_folder_layer(folder_array, folder)
-        if folder_array.length > 1
-          # add folder if it is not exist.
-          folder.add_folder(folder_array[0]) unless folder.folders.any? { |f| f.display_name == folder_array[0] }
-          new_folder = folder.folders.find { |f| f.display_name == folder_array[0] }
-          create_folder_layer(folder_array[1..-1], new_folder)
-        else
-          # Add layer first to the layers object of sketchup model.
-          layer = sketchup_model.layers.add(folder_array[0])
-          folder.add_layer(layer) unless folder.layers.any? { |l| l.display_name == layer }
-        end
-      end
-
       # Traversal method to create Sketchup objects from upcoming base object.
       # @param obj [Hash, Array] object might be source base object or it's sub objects, because this method is a
       #   self-caller method means that call itself according to conditions inside of it.
       # rubocop:disable Metrics/CyclomaticComplexity
       # rubocop:disable Metrics/PerceivedComplexity
-      def traverse_commit_object(obj, commit_folder, layer, model_preferences)
-        if can_convert_to_native(obj)
-          convert_to_native(obj, layer, model_preferences)
+      def traverse_commit_object(obj, layer, entities)
+        if convertible_to_native?(obj)
+          @state, _converted_entities = convert_to_native(@state, obj, layer, entities)
         elsif obj.is_a?(Hash) && obj.key?('speckle_type')
           return if ignored_speckle_type?(obj)
 
@@ -165,131 +271,122 @@ module SpeckleConnector
             # puts(">>> Found #{obj['speckle_type']}: #{obj['id']}. Continuing traversal.")
             props = obj.keys.filter_map { |key| key unless key.start_with?('_') }
             props.each do |prop|
-              layer_path = prop if prop.start_with?('@') && obj[prop].is_a?(Array)
-              layer = find_layer(layer_path, commit_folder, layer)
-              traverse_commit_object(obj[prop], commit_folder, layer, model_preferences)
+              traverse_commit_object(obj[prop], layer, entities)
             end
           else
             # puts(">>> Found #{obj['speckle_type']}: #{obj['id']} with displayValue.")
-            convert_to_native(obj, layer, model_preferences)
+            @state, _converted_entities = convert_to_native(@state, obj, layer, entities)
           end
         elsif obj.is_a?(Hash)
-          obj.each_value { |value| traverse_commit_object(value, commit_folder, layer, model_preferences) }
+          obj.each_value { |value| traverse_commit_object(value, layer, entities) }
         elsif obj.is_a?(Array)
-          obj.each { |value| traverse_commit_object(value, commit_folder, layer, model_preferences) }
+          obj.each { |value| traverse_commit_object(value, layer, entities) }
         end
       end
       # rubocop:enable Metrics/CyclomaticComplexity
       # rubocop:enable Metrics/PerceivedComplexity
 
-      # Find layer of the Speckle object by checking iteratively into folder.
-      # @param layer_path [String] complete layer_path to retrieve
-      # @param folder [Sketchup::LayerFolder, Sketchup::Layers] entry folder to search layer
-      # @param fallback_layer [Sketchup::Layer] fallback layer to assign object later if any error occur.
-      # @return [Sketchup::Layer] layer according to path
-      # @example
-      #   "@folder_1::folder_2::layer_1"
-      #   # it will return the layer object which has display name as `layer_1`.
-      def find_layer(layer_path, folder, fallback_layer)
-        begin
-          # Split folders and it's tail layer (last one is layer, others are folders.)
-          layer_path_array = layer_path[1..-1].split('::')
-          # Get sub folders as array, might be empty if `layer_path_array` has only 1 entry
-          sub_folders = layer_path_array.length > 1 ? layer_path_array[0..-2] : []
-          # Get exact layer name from last entry
-          layer_name = layer_path_array.last
-          # Iterate sub folders to find new sub folder to switch it.
-          # It help to search in the tree by switching the target search folder.
-          # Finally we can reach the layer name.
-          sub_folders.each do |sub_folder|
-            # Try to find sub folder into source folder passes by argument
-            s_f = folder.folders.find { |f| f.display_name == sub_folder }
-            # Switch source folder if any exist
-            folder = s_f unless s_f.nil?
-          end
-          # Find finally the layer into related folder
-          folder.layers.find { |l| l.display_name == layer_name }
-        rescue StandardError
-          return fallback_layer
-        end
+      def speckle_object_to_native(obj)
+        return DISPLAY_VALUE.method(:to_native) unless obj['displayValue'].nil? && obj['@displayValue'].nil?
+
+        SPECKLE_OBJECT_TO_NATIVE[obj['speckle_type']]
       end
 
-      # rubocop:disable Metrics/CyclomaticComplexity
-      # rubocop:disable Metrics/MethodLength
-      def convert_to_native(obj, layer, model_preferences, entities = sketchup_model.entities)
-        convert = method(:convert_to_native)
-        unless obj['displayValue'].nil?
-          return display_value_to_native_component(obj, layer, entities, model_preferences, &convert)
-        end
+      SPECKLE_OBJECT_TO_NATIVE = {
+        OBJECTS_GEOMETRY_LINE => LINE.method(:to_native),
+        OBJECTS_GEOMETRY_POLYLINE => LINE.method(:to_native),
+        OBJECTS_GEOMETRY_POLYCURVE => POLYCURVE.method(:to_native),
+        OBJECTS_GEOMETRY_ARC => ARC.method(:to_native),
+        OBJECTS_GEOMETRY_CIRCLE => CIRCLE.method(:to_native),
+        OBJECTS_GEOMETRY_MESH => MESH.method(:to_native),
+        OBJECTS_GEOMETRY_BREP => MESH.method(:to_native),
+        OBJECTS_OTHER_BLOCKDEFINITION => BLOCK_DEFINITION.method(:to_native),
+        OBJECTS_OTHER_BLOCKINSTANCE => BLOCK_INSTANCE.method(:to_native),
+        OBJECTS_OTHER_BLOCKINSTANCE_FULL => BLOCK_INSTANCE.method(:to_native),
+        OBJECTS_OTHER_REVIT_REVITINSTANCE => REVIT_INSTANCE.method(:to_native),
+        OBJECTS_OTHER_RENDERMATERIAL => RENDER_MATERIAL.method(:to_native),
+        OBJECTS_BUILTELEMENTS_VIEW3D => VIEW3D.method(:to_native),
+        OBJECTS_BUILTELEMENTS_REVIT_WALL => REVIT_WALL.method(:to_native),
+        OBJECTS_BUILTELEMENTS_REVIT_DIRECTSHAPE => BUILTELEMENTS::Revit::DirectShape.method(:to_native),
+        OBJECTS_BUILTELEMENTS_NETWORK => BUILTELEMENTS::Network.method(:to_native),
+        OBJECTS_GIS_POLYGONELEMENT => POLYGON_ELEMENT.method(:to_native),
+        OBJECTS_GIS_LINEELEMENT => LINE_ELEMENT.method(:to_native),
+        SPECKLE_CORE_MODELS_COLLECTION => COLLECTION.method(:to_native),
+        SPECKLE_CORE_MODELS_COLLECTION_RASTER_LAYER => GIS_LAYER_COLLECTION.method(:to_native),
+        SPECKLE_CORE_MODELS_COLLECTION_VECTOR_LAYER => GIS_LAYER_COLLECTION.method(:to_native)
+      }.freeze
 
-        case obj['speckle_type']
-        when 'Objects.Geometry.Line', 'Objects.Geometry.Polyline' then LINE.to_native(obj, layer, entities)
-        when 'Objects.Other.BlockInstance' then BLOCK_INSTANCE.to_native(sketchup_model, obj, layer, entities,
-                                                                         model_preferences, &convert)
-        when 'Objects.Other.BlockDefinition' then BLOCK_DEFINITION.to_native(sketchup_model, obj, layer,
-                                                                             obj['name'],
-                                                                             obj['always_face_camera'],
-                                                                             model_preferences,
-                                                                             obj['sketchup_attributes'],
-                                                                             obj['applicationId'],
-                                                                             &convert)
-        when 'Objects.Geometry.Mesh' then MESH.to_native(sketchup_model, obj, layer, entities, model_preferences)
-        when 'Objects.Geometry.Brep' then MESH.to_native(sketchup_model, obj['displayValue'], layer, entities,
-                                                         model_preferences)
+      # @param state [States::State] state of the speckle application
+      def convert_to_native(state, obj, layer, entities = sketchup_model.entities)
+        # store this method as parameter to re-call it inner callstack
+        convert_to_native = method(:convert_to_native)
+        # Get 'to_native' method to convert upcoming speckle object to native sketchup entity
+        to_native_method = speckle_object_to_native(obj)
+        # Call 'to_native' method by passing this method itself to handle nested 'to_native' conversions.
+        # It returns updated state and converted entities.
+        state, converted_entities = to_native_method.call(state, obj, layer, entities, &convert_to_native)
+        faces = converted_entities.select { |e| e.is_a?(Sketchup::Face) }
+        @converted_faces += faces if faces.any?
+        if from_revit
+          # Create levels as section planes if they exists
+          create_levels(state, obj)
+          # Create layers from category of object and place object in it
+          create_layers_from_categories(state, obj, converted_entities)
         end
+        # Create speckle entities from sketchup entities to achieve continuous traversal.
+        SpeckleEntities::SpeckleEntity.from_speckle_object(state, obj, converted_entities, stream_id)
       rescue StandardError => e
         puts("Failed to convert #{obj['speckle_type']} (id: #{obj['id']})")
         puts(e)
-        nil
+        return state, []
       end
-      # rubocop:enable Metrics/CyclomaticComplexity
-      # rubocop:enable Metrics/MethodLength
 
-      # Creates a component definition and instance from a speckle object with a display value
-      # rubocop:disable Metrics/PerceivedComplexity
       # rubocop:disable Metrics/CyclomaticComplexity
-      # rubocop:disable Metrics/MethodLength
-      def display_value_to_native_component(obj, layer, entities, model_preferences, &convert)
-        obj_id = obj['applicationId'].to_s.empty? ? obj['id'] : obj['applicationId']
+      # rubocop:disable Metrics/PerceivedComplexity
+      def create_layers_from_categories(state, speckle_object, entities)
+        return state if speckle_object['category'].nil?
 
-        block_definition = obj['@blockDefinition'] || obj['blockDefinition']
+        layer = sketchup_model.layers.find { |l| l.display_name == speckle_object['category'] }
+        unless layer.nil?
+          entities.each { |entity| entity.layer = layer if entity.respond_to?(:layer) } if layer
+          return state
+        end
 
-        definition = BLOCK_DEFINITION.to_native(
-          sketchup_model,
-          obj['displayValue'],
-          layer,
-          "def::#{obj_id}",
-          if block_definition.nil?
-            false
-          else
-            block_definition['always_face_camera'].nil? ? false : block_definition['always_face_camera']
-          end,
-          model_preferences,
-          if block_definition.nil?
-            nil
-          else
-            block_definition['sketchup_attributes'].nil? ? nil : block_definition['sketchup_attributes']
-          end,
-          obj_id,
-          &convert
-        )
-
-        find_and_erase_existing_instance(definition, obj_id)
-        t_arr = obj['transform']
-        transform = t_arr.nil? ? Geom::Transformation.new : OTHER::Transform.to_native(t_arr, units)
-        instance = entities.add_instance(definition, transform)
-        instance.name = obj_id
-        instance
+        layer = sketchup_model.layers.add(speckle_object['category'])
+        unless layer.nil?
+          entities.each { |entity| entity.layer = layer if entity.respond_to?(:layer) } if layer
+          state
+        end
+        state
       end
-      # rubocop:enable Metrics/PerceivedComplexity
       # rubocop:enable Metrics/CyclomaticComplexity
-      # rubocop:enable Metrics/MethodLength
+      # rubocop:enable Metrics/PerceivedComplexity
 
-      # Takes a component definition and finds and erases the first instance with the matching name
-      # (and optionally the applicationId)
-      def find_and_erase_existing_instance(definition, name, app_id = '')
-        definition.instances.find { |ins| ins.name == name || ins.guid == app_id }&.erase!
+      # @param state [States::State] state of the speckle application
+      def create_levels(state, speckle_object)
+        level = speckle_object['level']
+        return state if level.nil?
+        return state unless level['speckle_type'].include?('Objects.BuiltElements.Level')
+
+        level_name = level['name'] || level['id']
+        is_exist = @entities_to_fill.grep(Sketchup::SectionPlane).any? { |sp| sp.name == level_name }
+        return state if is_exist
+
+        elevation = SpeckleObjects::Geometry.length_to_native(level['elevation'], level['units'])
+
+        section_plane = @entities_to_fill.add_section_plane([0, 0, elevation + LEVEL_SHIFT_VALUE], [0, 0, -1])
+        section_plane.name = level_name
+        SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.write_initial_base_data(
+          section_plane, level['applicationId'], level['id'], level['speckle_type'], [], @stream_id
+        )
+        state
+      end
+
+      # @param state [States::State] state of the application
+      def convert_to_speckle_entities(state, speckle_objects_with_entities)
+        return state if speckle_objects_with_entities.empty?
       end
     end
+    # rubocop:enable Metrics/ClassLength
   end
 end

speckle_connector/src/convertors/to_speckle.rb

@@ -2,8 +2,6 @@
 
 require_relative 'converter'
 require_relative 'base_object_serializer'
-require_relative '../relations/many_to_one_relation'
-require_relative '../speckle_entities/speckle_entities'
 require_relative '../speckle_objects/base'
 require_relative '../speckle_objects/geometry/line'
 require_relative '../speckle_objects/geometry/length'
@@ -12,89 +10,37 @@ require_relative '../speckle_objects/other/block_instance'
 require_relative '../speckle_objects/other/block_definition'
 require_relative '../speckle_objects/other/rendering_options'
 require_relative '../speckle_objects/built_elements/view3d'
+require_relative '../speckle_objects/built_elements/revit/direct_shape'
+require_relative '../speckle_objects/relations/layers'
+require_relative '../speckle_objects/speckle/core/models/model_collection'
 require_relative '../constants/path_constants'
+require_relative '../sketchup_model/reader/speckle_entities_reader'
+require_relative '../sketchup_model/reader/mapper_reader'
+require_relative '../sketchup_model/query/entity'
 
 module SpeckleConnector
   module Converters
     # Converts sketchup entities to speckle objects.
     class ToSpeckle < Converter
-      # @return [Hash{Symbol=>Array}] layers to hold it's objects under the base object.
-      attr_reader :layers
-
-      # @return [States::State] the current speckle state of the {States::State}
-      attr_reader :state
-
-      # @return [States::SpeckleState] the current speckle state of the {States::State}
-      attr_reader :speckle_state
-
-      # @return [Relations::ManyToOneRelation] relations between objects.
-      attr_accessor :relation
-
-      def initialize(state)
-        super(state.sketchup_state)
-        @state = state
-        @speckle_state = @state.speckle_state
-        @layers = add_all_layers
-        @relation = Relations::ManyToOneRelation.new
-      end
+      MODEL_COLLECTION = SpeckleObjects::Speckle::Core::Models::ModelCollection
+      DIRECT_SHAPE = SpeckleObjects::BuiltElements::Revit::DirectShape
+      SPECKLE_ENTITIES_READER = SketchupModel::Reader::SpeckleEntitiesReader
+      VIEW3D = SpeckleObjects::BuiltElements::View3d
 
       # Convert selected objects by putting them into related array that grouped by layer.
       # @return [Hash{Symbol=>Array}] layers -which only have objects- to hold it's objects under the base object.
       def convert_selection_to_base(preferences)
-        state = speckle_state
-        sketchup_model.selection.each do |entity|
-          new_speckle_state, converted_object_with_entity = convert(entity, preferences, state)
-          state = new_speckle_state
-          layer_name = entity_layer_path(entity)
-          layers[layer_name].push(converted_object_with_entity)
-        end
-        # send only+ layers that have any object
-        base_object_properties = layers.reject { |_layer_name, objects| objects.empty? }
-        add_views(base_object_properties) if sketchup_model.pages.any?
-        return state, SpeckleObjects::Base.with_detached_layers(base_object_properties)
-      end
+        convert = method(:convert)
+        new_speckle_state, model_collection = MODEL_COLLECTION.from_sketchup_model(sketchup_model, speckle_state,
+                                                                                   @units, preferences, &convert)
 
-      # Add views from pages.
-      # @param base_object_properties [Hash] dynamically attached base object properties.
-      def add_views(base_object_properties)
-        views = []
-        sketchup_model.pages.each do |page|
-          cam = page.camera
-          origin = get_camera_origin(cam)
-          target = get_camera_target(cam)
-          direction = get_camera_direction(cam)
-          update_properties = get_scene_update_properties(page)
-          rendering_options = SpeckleObjects::Others::RenderingOptions.to_speckle(page.rendering_options)
-          view = SpeckleObjects::BuiltElements::View3d.new(
-            page.name, origin, target, direction, SpeckleObjects::Geometry::Vector.new(0, 0, 1, @units),
-            cam.perspective?, cam.fov, @units, page.name, update_properties, rendering_options
-          )
-          views.append(view)
-        end
-        base_object_properties['@Named Views'] = views
-      end
-
-      # Get scene properties
-      # @param page [Sketchup::Page] page on sketchup.
-      def get_scene_update_properties(page)
-        {
-          use_axes: page.use_axes?,
-          use_camera: page.use_camera?,
-          use_hidden_geometry: page.use_hidden_geometry?,
-          use_hidden_layers: page.use_hidden_layers?,
-          use_hidden_objects: page.use_hidden_objects?,
-          use_rendering_options: page.use_rendering_options?,
-          use_section_planes: page.use_section_planes?,
-          use_shadow_info: page.use_shadow_info?,
-          use_style: page.use_style?
-        }
+        return new_speckle_state, model_collection
       end
 
       # Serialized and traversed information to send batches.
       # @param base_and_entity [SpeckleObjects::Base] base object to serialize.
-      # @param stream_id [String] stream id to send conversion
       # @return [String, Integer, Array<Object>] base id, total_children_count of base and batches
-      def serialize(base_and_entity, speckle_state, preferences, stream_id)
+      def serialize(base_and_entity, speckle_state, preferences)
         serializer = SpeckleConnector::Converters::BaseObjectSerializer.new(speckle_state, stream_id, preferences)
         t = Time.now.to_f
         id = serializer.serialize(base_and_entity)
@@ -115,17 +61,27 @@ module SpeckleConnector
       # @param entity [Sketchup::Entity] sketchup entity to convert Speckle.
       # @param speckle_state [States::SpeckleState] the current speckle state of the {States::State}
       # @param parent [Symbol, String] parent of the Sketchup Entity to be converted.
-      # rubocop:disable Metrics/MethodLength
       def convert(entity, preferences, speckle_state, parent = :base)
         convert = method(:convert)
 
+        unless SketchupModel::Reader::MapperReader.mapped_with_schema?(entity) &&
+               !entity.is_a?(Sketchup::ComponentDefinition)
+          return from_native_to_speckle(entity, preferences, speckle_state, parent, &convert)
+        end
+
+        return speckle_state, nil
+      end
+
+      # rubocop:disable Metrics/MethodLength
+      def from_native_to_speckle(entity, preferences, speckle_state, parent, &convert)
         if entity.is_a?(Sketchup::Edge)
           line = SpeckleObjects::Geometry::Line.from_edge(entity, @units, preferences[:model]).to_h
           return speckle_state, [line, [entity]]
         end
 
         if entity.is_a?(Sketchup::Face)
-          mesh = SpeckleObjects::Geometry::Mesh.from_face(entity, @units, preferences[:model])
+          mesh = SpeckleObjects::Geometry::Mesh.from_face(speckle_state: speckle_state, face: entity, units: @units,
+                                                          model_preferences: preferences[:model])
           return speckle_state, [mesh, [entity]]
         end
 
@@ -146,9 +102,13 @@ module SpeckleConnector
         end
 
         if entity.is_a?(Sketchup::ComponentDefinition)
+          # Local caching
+          return speckle_state, [definitions[entity.guid], [entity]] if definitions.key?(entity.guid)
+
           new_speckle_state, block_definition = SpeckleObjects::Other::BlockDefinition.from_definition(
-            entity, @units, @definitions, preferences, speckle_state, parent, &convert
+            entity, @units, preferences, speckle_state, parent, &convert
           )
+          definitions[entity.guid] = block_definition
           speckle_state = new_speckle_state
           return speckle_state, [block_definition, [entity]]
         end
@@ -156,97 +116,6 @@ module SpeckleConnector
         return speckle_state, nil
       end
       # rubocop:enable Metrics/MethodLength
-
-      # Create layers -> {Hash{Symbol=>Array}} from sketchup model with empty array as hash entry values.
-      # This method add first headless layers (not belong to any folder),
-      # then goes through each folder, their sub-folders and their layers.
-      # @return [Hash{Symbol=>Array}] layers from sketchup model with empty array as hash entry values.
-      def add_all_layers
-        # add headless layers
-        layer_objects = add_layers(sketchup_model.layers.layers)
-        # add layers from folders
-        add_layers_from_folders(sketchup_model.layers.folders, layer_objects)
-        layer_objects
-      end
-
-      # @param layers [Array<Sketchup::Layer>] layers in sketchup model
-      # @return [Hash{Symbol=>Array}] layers with empty array value.
-      def add_layers(layers, layer_objects = {}, parent_name = '')
-        layers.each do |layer|
-          layer_name = parent_name.empty? ? "@#{layer.display_name}" : "#{parent_name}::#{layer.display_name}"
-          layer_objects[layer_name] = []
-        end
-        layer_objects
-      end
-
-      # @param folders [Array<Sketchup::LayerFolder>] layer folders in sketchup model.
-      # @param layer_objects [Hash{Symbol=>Array}] layer objects to fill in.
-      # @param parent_name [String] parent folder name to structure layer path before send to Speckle.
-      #  ex: "@#{parent_name}::#{layer_name}"
-      def add_layers_from_folders(folders, layer_objects, parent_name = '')
-        folders.each do |folder|
-          folder_name = parent_name.empty? ? "@#{folder.display_name}" : "#{parent_name}::#{folder.display_name}"
-          add_layers(folder.layers, layer_objects, folder_name)
-          add_layers_from_folders(folder.folders, layer_objects, folder_name) unless folder.folders.empty?
-        end
-      end
-
-      # Find layer path of given Sketchup entity.
-      # @param entity [Sketchup::Entity] entity to find root layer.
-      # @return [String] layer path of Sketchup entity.
-      def entity_layer_path(entity)
-        layer_name = entity.layer.display_name
-        if entity.layer.folder.nil?
-          "@#{layer_name}"
-        else
-          folders = folder_name(entity.layer.folder)
-          path = ''
-          folders.reverse.each do |folder|
-            path += "#{folder}::"
-          end
-          "@#{path}#{layer_name}"
-        end
-      end
-
-      # Nested method to retrieve sub-folders until nothing found.
-      # @return [Array<String>] folder names as list from bottom to top. Might need to be reversed if you want to see
-      #  from top to bottom.
-      def folder_name(folder, folders = [])
-        if folder.folder.nil?
-          folders.push(folder.display_name)
-        else
-          folder_name(folder.folder, folders.push(folder.display_name))
-        end
-      end
-
-      private
-
-      def get_camera_direction(cam)
-        SpeckleObjects::Geometry::Vector.new(
-          SpeckleObjects::Geometry.length_to_speckle(cam.direction[0], @units),
-          SpeckleObjects::Geometry.length_to_speckle(cam.direction[1], @units),
-          SpeckleObjects::Geometry.length_to_speckle(cam.direction[2], @units),
-          @units
-        )
-      end
-
-      def get_camera_target(cam)
-        SpeckleObjects::Geometry::Point.new(
-          SpeckleObjects::Geometry.length_to_speckle(cam.target[0], @units),
-          SpeckleObjects::Geometry.length_to_speckle(cam.target[1], @units),
-          SpeckleObjects::Geometry.length_to_speckle(cam.target[2], @units),
-          @units
-        )
-      end
-
-      def get_camera_origin(camera)
-        SpeckleObjects::Geometry::Point.new(
-          SpeckleObjects::Geometry.length_to_speckle(camera.eye[0], @units),
-          SpeckleObjects::Geometry.length_to_speckle(camera.eye[1], @units),
-          SpeckleObjects::Geometry.length_to_speckle(camera.eye[2], @units),
-          @units
-        )
-      end
     end
   end
 end

speckle_connector/src/log/log.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  # Helper module for logging.
+  module Log
+    def self.write_to_file(text, file_name = 'log', path = "#{ENV['HOME']}/Desktop")
+      file_path = path + "/#{file_name}.json"
+      File.delete(file_path) if File.exist?(file_path)
+      File.write(file_path, text)
+    end
+  end
+end

speckle_connector/src/mapper/category/revit_category.rb

@@ -0,0 +1,142 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module Mapper
+    module Category
+      # Revit categories.
+      class RevitCategory < Hash
+        class << self
+          # rubocop:disable Metrics/MethodLength
+          def dictionary
+            {
+              AbutmentFoundations: 0,
+              AbutmentPiles: 1,
+              AbutmentWalls: 2,
+              BridgeAbutments: 3,
+              DuctTerminal: 4,
+              Alignments: 5,
+              StructConnectionAnchors: 6,
+              ApproachSlabs: 7,
+              BridgeArches: 8,
+              AudioVisualDevices: 9,
+              StairsRailingBaluster: 10,
+              BridgeBearings: 11,
+              StructConnectionBolts: 12,
+              BridgeCables: 13,
+              BridgeDecks: 14,
+              BridgeFraming: 15,
+              CableTrayFitting: 16,
+              CableTrayRun: 17,
+              CableTray: 18,
+              Casework: 19,
+              Ceilings: 20,
+              Columns: 21,
+              CommunicationDevices: 22,
+              ConduitFitting: 23,
+              Conduit: 24,
+              Coordination_Model: 25,
+              BridgeFramingCrossBracing: 26,
+              CurtainWallPanels: 27,
+              CurtaSystem: 28,
+              CurtainWallMullions: 29,
+              DataDevices: 30,
+              BridgeFramingDiaphragms: 31,
+              Doors: 32,
+              DuctAccessory: 33,
+              DuctFitting: 34,
+              PlaceHolderDucts: 35,
+              DuctSystem: 36,
+              DuctCurves: 37,
+              ElectricalEquipment: 38,
+              ElectricalFixtures: 39,
+              Entourage: 40,
+              ExpansionJoints: 41,
+              FireAlarmDevices: 42,
+              FireProtection: 43,
+              Floors: 44,
+              FoodServiceEquipment: 45,
+              Furniture: 46,
+              FurnitureSystems: 47,
+              GenericAnnotation: 48,
+              GenericModel: 49,
+              BridgeGirders: 50,
+              Hardscape: 51,
+              LightingDevices: 52,
+              LightingFixtures: 53,
+              Lines: 54,
+              Mass: 55,
+              MechanicalEquipment: 56,
+              MedicalEquipment: 57,
+              NurseCallDevices: 58,
+              Parking: 59,
+              Parts: 60,
+              PierCaps: 61,
+              PierColumns: 62,
+              BridgeFoundations: 63,
+              PierPiles: 64,
+              BridgeTowers: 65,
+              PierWalls: 66,
+              BridgePiers: 67,
+              PipeAccessory: 68,
+              PipeFitting: 69,
+              PlaceHolderPipes: 70,
+              PipeSegments: 71,
+              PipeCurves: 72,
+              PipingSystem: 73,
+              Planting: 74,
+              StructConnectionPlates: 75,
+              PlumbingFixtures: 76,
+              StructConnectionProfiles: 77,
+              StairsRailing: 78,
+              Ramps: 79,
+              Roads: 80,
+              Roofs: 81,
+              SecurityDevices: 82,
+              StructConnectionShearStuds: 83,
+              Signage: 84,
+              Site: 85,
+              SpecialityEquipment: 86,
+              Sprinklers: 87,
+              Stairs: 88,
+              StructuralFramingSystem: 89,
+              StructuralColumns: 90,
+              StructConnections: 91,
+              FabricAreas: 92,
+              StructuralFoundation: 93,
+              StructuralFraming: 94,
+              Rebar: 95,
+              Coupler: 96,
+              StructuralStiffener: 97,
+              StructuralTendons: 98,
+              StructuralTruss: 99,
+              TemporaryStructure: 100,
+              Topography: 101,
+              BridgeFramingTrusses: 102,
+              VerticalCirculation: 103,
+              VibrationDampers: 104,
+              VibrationIsolators: 105,
+              VibrationManagement: 106,
+              Walls: 107,
+              StructConnectionWelds: 108,
+              Windows: 109,
+              Railings: 110
+            }.freeze
+          end
+          # rubocop:enable Metrics/MethodLength
+
+          def reverse_dictionary
+            dictionary.collect { |k, v| [v, k] }.to_h
+          end
+
+          def to_a
+            dictionary.collect { |k, v| { key: k, value: v } }.to_a
+          end
+
+          def reverse_to_a
+            dictionary.collect { |k, v| { key: v, value: k } }.to_a
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/mapper/category/revit_family_category.rb

@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module Mapper
+    module Category
+      # Revit categories for families.
+      class RevitFamilyCategory < Hash
+        class << self
+          # rubocop:disable Metrics/MethodLength
+          def dictionary
+            {
+              AudioVisualDevices: 9,
+              CableTrayFitting: 16,
+              Casework: 19,
+              Columns: 21,
+              CommunicationDevices: 22,
+              ConduitFitting: 23,
+              DataDevices: 30,
+              Doors: 32,
+              DuctAccessory: 33,
+              ElectricalEquipment: 38,
+              ElectricalFixtures: 39,
+              Entourage: 40,
+              FireAlarmDevices: 42,
+              FireProtection: 43,
+              FoodServiceEquipment: 45,
+              Furniture: 46,
+              FurnitureSystems: 47,
+              GenericAnnotation: 48,
+              GenericModel: 49,
+              Hardscape: 51,
+              LightingDevices: 52,
+              LightingFixtures: 53,
+              Lines: 54,
+              Mass: 55,
+              MechanicalEquipment: 56,
+              MedicalEquipment: 57,
+              NurseCallDevices: 58,
+              Parking: 59,
+              PipeAccessory: 68,
+              PipeFitting: 69,
+              Planting: 74,
+              PlumbingFixtures: 76,
+              Roads: 80,
+              SecurityDevices: 82,
+              Signage: 84,
+              Site: 85,
+              SpecialityEquipment: 86,
+              Sprinklers: 87,
+              StructuralFramingSystem: 89,
+              StructuralColumns: 90,
+              StructConnections: 91,
+              StructuralFoundation: 93,
+              StructuralFraming: 94,
+              StructuralStiffener: 97,
+              TemporaryStructure: 100,
+              VerticalCirculation: 103,
+              Windows: 109,
+              Railings: 110
+            }.freeze
+          end
+          # rubocop:enable Metrics/MethodLength
+
+          def reverse_dictionary
+            dictionary.collect { |k, v| [v, k] }.to_h
+          end
+
+          def to_a
+            dictionary.collect { |k, v| { key: k, value: v } }.to_a
+          end
+
+          def reverse_to_a
+            dictionary.collect { |k, v| { key: v, value: k } }.to_a
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/mapper/mapper.rb

@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require_relative '../speckle_objects/built_elements/revit/revit_floor'
+require_relative '../speckle_objects/built_elements/revit/revit_wall'
+require_relative '../speckle_objects/built_elements/default_floor'
+require_relative '../speckle_objects/built_elements/default_wall'
+require_relative '../speckle_objects/other/mapped_block_wrapper'
+require_relative '../sketchup_model/query/entity'
+require_relative '../sketchup_model/reader/mapper_reader'
+require_relative '../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  # Mapper is a tool to convert SketchUp entities to other applications' native objects.
+  module Mapper
+    # Collects mapped entities on selection as flat list.
+    def self.mapped_entities_on_selection(sketchup_model)
+      flat_selection_with_path = SketchupModel::Query::Entity.flat_entities_with_path(
+        sketchup_model.selection,
+        [Sketchup::Face, Sketchup::ComponentInstance, Sketchup::Group], [sketchup_model]
+      )
+      mapped_selection = []
+      flat_selection_with_path.each do |entities|
+        entity = entities[0]
+        is_entity_mapped = SketchupModel::Reader::MapperReader.mapped_with_schema?(entity)
+        if entity.respond_to?(:definition)
+          is_definition_mapped = SketchupModel::Reader::MapperReader.mapped_with_schema?(entity.definition)
+          mapped_selection.append(entities) if is_entity_mapped || is_definition_mapped
+          next
+        end
+        mapped_selection.append(entities) if is_entity_mapped
+      end
+      mapped_selection
+    end
+
+    def self.to_speckle(speckle_state, entity, units, model_preferences, global_transformation: nil, path: nil)
+      speckle_schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.speckle_schema_to_speckle(entity)
+      return speckle_schema if speckle_schema.nil?
+
+      if speckle_schema['method'] == 'Default Floor'
+        return SpeckleObjects::BuiltElements::DefaultFloor
+               .to_speckle_schema(entity, units, global_transformation: global_transformation)
+      end
+
+      if speckle_schema['method'] == 'Floor'
+        return SpeckleObjects::BuiltElements::RevitFloor
+               .to_speckle_schema(speckle_state, entity, units, global_transformation: global_transformation)
+      end
+
+      if speckle_schema['method'] == 'Default Wall'
+        return SpeckleObjects::BuiltElements::DefaultWall
+               .to_speckle_schema(entity, units, global_transformation: global_transformation)
+      end
+
+      if speckle_schema['method'] == 'Wall'
+        return SpeckleObjects::BuiltElements::RevitWall
+               .to_speckle_schema(speckle_state, entity, units, global_transformation: global_transformation)
+      end
+
+      return speckle_schema
+    end
+  end
+end

speckle_connector/src/mapper/mapper_source.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require_relative '../immutable/immutable'
+require_relative '../speckle_objects/built_elements/level'
+require_relative '../speckle_objects/built_elements/revit/revit_element_type'
+
+module SpeckleConnector
+  # Mapper is a tool to convert SketchUp entities to other applications' native objects.
+  module Mapper
+    # Mapper source object that collects information about stream id and commit id to identify source in the branch,
+    # also contains levels and family types to be able to map objects with them.
+    class MapperSource
+      # @return [String] stream id of the mapper source.
+      attr_reader :stream_id
+
+      # @return [String] commit id of the mapper source.
+      attr_reader :commit_id
+
+      # @return [Array<SpeckleObjects::BuiltElements::Level>] levels in the source branch.
+      attr_reader :levels
+
+      # @return [ImmutableHash{String=>Array<SpeckleObjects::BuiltElements::Revit::RevitElementType>}] revit element
+      #  types.
+      attr_reader :types
+
+      def initialize(stream_id, commit_id, levels, types)
+        @stream_id = stream_id
+        @commit_id = commit_id
+        @levels = levels
+        @types = types
+      end
+    end
+  end
+end

speckle_connector/src/observers/factory.rb

@@ -5,6 +5,7 @@ require_relative 'entities_observer'
 require_relative 'observer_handler'
 require_relative 'model_observer'
 require_relative 'event_handler'
+require_relative 'selection_observer'
 require_relative '../constants/observer_constants'
 
 module SpeckleConnector
@@ -22,7 +23,8 @@ module SpeckleConnector
         {
           APP_OBSERVER => AppObserver.new(handler),
           ENTITIES_OBSERVER => EntitiesObserver.new(handler),
-          MODEL_OBSERVER => ModelObserver.new(handler)
+          MODEL_OBSERVER => ModelObserver.new(handler),
+          SELECTION_OBSERVER => SelectionObserver.new(handler)
         }.freeze
       end
     end

speckle_connector/src/observers/selection_observer.rb

@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+require_relative 'event_observer'
+
+module SpeckleConnector
+  module Observers
+    # @see https://ruby.sketchup.com/Sketchup/SelectionObserver.html
+    class SelectionObserver < Sketchup::SelectionObserver
+      include EventObserver
+
+      # rubocop:disable Naming/MethodName
+      # @param _selection (Sketchup::Selection)
+      # @param _entity (Sketchup::Entity)
+      def onSelectionAdded(_selection, _entity)
+        push_selection_event(:onSelectionAdded)
+      end
+
+      # @param _selection (Sketchup::Selection)
+      def onSelectionBulkChange(_selection)
+        push_selection_event(:onSelectionBulkChange)
+      end
+
+      # @param _selection (Sketchup::Selection)
+      def onSelectionCleared(_selection)
+        push_selection_event(:onSelectionCleared)
+      end
+
+      # @param _selection (Sketchup::Selection)
+      def onSelectionRemoved(_selection, _entity)
+        push_selection_event(:onSelectionRemoved)
+      end
+
+      # Due to a SketchUp bug, this method is called by the wrong name.
+      alias onSelectedRemoved onSelectionRemoved
+      # rubocop:enable Naming/MethodName
+
+      private
+
+      # Selection changes need to be registered only once
+      def push_selection_event(event_name)
+        # Don't push anything if the selection event was already registered
+        selection_events = observer_handler.events[self.class]
+        return if selection_events&.any?
+
+        push_event(event_name)
+      end
+    end
+  end
+end

speckle_connector/src/preferences/preferences.rb

@@ -3,6 +3,7 @@
 require_relative '../ext/sqlite3'
 require_relative '../immutable/immutable'
 require_relative '../constants/path_constants'
+require_relative '../constants/pref_constants'
 require_relative '../sketchup_model/dictionary/speckle_model_dictionary_handler'
 
 module SpeckleConnector
@@ -10,112 +11,96 @@ module SpeckleConnector
   module Preferences
     include Immutable::ImmutableUtils
     DICT_HANDLER = SketchupModel::Dictionary::SpeckleModelDictionaryHandler
-    DEFAULT_CONFIG = "('configSketchup', '{\"dark_theme\":false, \"diffing\":false}');"
-    DEFAULT_PREFERENCES = '{"dark_theme":false, "diffing":false}'
+    # rubocop:disable Layout/LineLength
+    DEFAULT_CONFIG = "('configSketchup', '{\"dark_theme\":false, \"diffing\":false, \"register_speckle_entity\":false, \"fe2\":false}');"
+    # rubocop:enable Layout/LineLength
+    DEFAULT_PREFERENCES = '{"dark_theme":false, "diffing":false, "register_speckle_entity": false, "fe2": false}'
 
     # @param sketchup_model [Sketchup::Model] active model.
-    # rubocop:disable Metrics/MethodLength
-    # rubocop:disable Metrics/AbcSize
-    def self.init_preferences(sketchup_model)
-      # Init sqlite database
+    def self.read_preferences(sketchup_model)
       db = Sqlite3::Database.new(SPECKLE_CONFIG_DB_PATH)
+      user_preferences = validate_user_preferences(db)
+      model_preferences = validate_model_preferences(sketchup_model)
+      Immutable::Hash.new(
+        {
+          user: user_preferences,
+          model: model_preferences
+        }
+      )
+    end
 
-      data = db.exec("SELECT content FROM 'objects' WHERE hash = 'configSketchup'")
-      is_data_empty = data.empty?
-      is_data_incomplete = !is_data_empty && !JSON.parse(data.first.first).to_h.length != 2
+    # Whether row data is complete with preference or not.
+    # It is useful for backward compatibility, when we add new preferences it should be reset when user initialize it.
+    def self.data_complete?(row_data)
+      return false if row_data.empty?
 
-      # Check configSketchup key is valid or not, otherwise init with default settings
-      if is_data_empty || is_data_incomplete
-        db.exec("INSERT INTO 'objects' VALUES #{DEFAULT_CONFIG}") if is_data_empty
-        if is_data_incomplete
-          db.exec("UPDATE 'objects' SET content = '#{DEFAULT_PREFERENCES}' WHERE hash = 'configSketchup'")
+      begin
+        data = JSON.parse(row_data.first.first)
+        if data['dark_theme'].nil? || data['fe2'].nil? || data['diffing'].nil? || data['register_speckle_entity'].nil?
+          return false
+        end
+
+        true
+      rescue StandardError
+        false
+      end
+    end
+
+    # Validates current preferences. If there are incomplete data then this method resets it with default preferences.
+    # @param database [Sqlite3::Database] database for queries.
+    # rubocop:disable Metrics/MethodLength
+    def self.validate_user_preferences(database)
+      row_data = database.exec("SELECT content FROM 'objects' WHERE hash = 'configSketchup'")
+      is_config_sketchup_exist = !row_data.empty?
+      is_data_complete = data_complete?(row_data)
+      if !is_config_sketchup_exist || !is_data_complete
+        if is_config_sketchup_exist
+          unless is_data_complete
+            # Update table with default preferences
+            database.exec("UPDATE 'objects' SET content = '#{DEFAULT_PREFERENCES}' WHERE hash = 'configSketchup'")
+          end
+        else
+          # Insert configSketchup completely to objects.
+          database.exec("INSERT INTO 'objects' VALUES #{DEFAULT_CONFIG}")
         end
       end
 
       # Select data
-      data = db.exec("SELECT content FROM 'objects' WHERE hash = 'configSketchup'").first.first
-
+      row_data = database.exec("SELECT content FROM 'objects' WHERE hash = 'configSketchup'").first.first
       # Parse string to hash
-      data_hash = JSON.parse(data).to_h
-
+      data_hash = JSON.parse(row_data).to_h
       # Get current theme value
       dark_theme = data_hash['dark_theme']
+      fe2 = data_hash['fe2']
       diffing = data_hash['diffing']
+      register_speckle_entity = data_hash['register_speckle_entity']
 
-      speckle_dictionary = sketchup_model.attribute_dictionary('Speckle')
-
-      if speckle_dictionary
-        Immutable::Hash.new(
-          {
-            user: {
-              dark_theme: dark_theme,
-              diffing: diffing
-            },
-            model: {
-              combine_faces_by_material: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :combine_faces_by_material,
-                'Speckle'
-              ),
-              include_entity_attributes: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :include_entity_attributes,
-                'Speckle'
-              ),
-              include_face_entity_attributes: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :include_face_entity_attributes,
-                'Speckle'
-              ),
-              include_edge_entity_attributes: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :include_edge_entity_attributes,
-                'Speckle'
-              ),
-              include_group_entity_attributes: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :include_group_entity_attributes,
-                'Speckle'
-              ),
-              include_component_entity_attributes: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :include_component_entity_attributes,
-                'Speckle'
-              ),
-              merge_coplanar_faces: DICT_HANDLER.get_attribute(
-                sketchup_model,
-                :merge_coplanar_faces,
-                'Speckle'
-              )
-            }
-          }
-        )
-      else
-        DICT_HANDLER.write_initial_model_data(sketchup_model, default_model_preferences)
-        Immutable::Hash.new(
-          {
-            user: {
-              dark_theme: dark_theme,
-              diffing: diffing
-            },
-            model: default_model_preferences
-          }
-        )
-      end
+      {
+        dark_theme: dark_theme,
+        fe2: fe2,
+        diffing: diffing,
+        register_speckle_entity: register_speckle_entity
+      }.freeze
     end
     # rubocop:enable Metrics/MethodLength
-    # rubocop:enable Metrics/AbcSize
 
-    def self.default_model_preferences
-      {
-        combine_faces_by_material: true,
-        include_entity_attributes: true,
-        include_face_entity_attributes: true,
-        include_edge_entity_attributes: true,
-        include_group_entity_attributes: true,
-        include_component_entity_attributes: true,
-        merge_coplanar_faces: true
-      }
+    # @param sketchup_model [Sketchup::Model] sketchup model to validate model preferences
+    def self.validate_model_preferences(sketchup_model)
+      speckle_dictionary = sketchup_model.attribute_dictionary('Speckle')
+      if speckle_dictionary.nil?
+        DICT_HANDLER.write_initial_model_data(sketchup_model, DEFAULT_MODEL_PREFERENCES)
+        return DEFAULT_MODEL_PREFERENCES
+      end
+
+      DEFAULT_MODEL_PREFERENCES.collect do |pref_key, default_value|
+        pref_value = DICT_HANDLER.get_attribute(
+          sketchup_model,
+          pref_key,
+          'Speckle'
+        )
+        DICT_HANDLER.set_attribute(sketchup_model, pref_key, default_value, 'Speckle') if pref_value.nil?
+        pref_value.nil? ? [pref_key, default_value] : [pref_key, pref_value]
+      end.to_h
     end
   end
 end

speckle_connector/src/sketchup_model/definitions/definitions.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Definitions to store for entities.
+    class Definitions
+      def self.from_sketchup_model(model)
+        definitions = model.definitions
+        definitions = definitions.select do |definition|
+          !definition.attribute_dictionaries.nil? &&
+            definition.attribute_dictionaries.any? { |dict| dict.name == SPECKLE_BASE_OBJECT }
+        end
+        Definitions.new(definitions)
+      end
+
+      def add_definition(definition)
+        old_definition = @definitions_by_guid[definition.guid]
+        return self if definition == old_definition
+
+        new_definitions = @definitions.append(definition)
+        Definitions.new(new_definitions)
+      end
+
+      def initialize(definitions = [])
+        @definitions = definitions
+        @definitions_by_name = definitions.collect do |definition|
+          [definition.name, definition]
+        end.to_h.freeze
+        @definitions_by_guid = definitions.collect do |definition|
+          [definition.guid, definition]
+        end.to_h.freeze
+        freeze
+      end
+
+      def by_guid(guid)
+        @definitions_by_guid[guid]
+      end
+
+      def by_name(name)
+        @definitions_by_name[name]
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/dictionary/base_dictionary_handler.rb

@@ -0,0 +1,89 @@
+# frozen_string_literal: true
+
+require 'delegate'
+require_relative 'dictionary_handler'
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  module SketchupModel
+    module Dictionary
+      # Read and write attributes for Speckle objects on SketchUp model.
+      class BaseDictionaryHandler < DictionaryHandler
+        IGNORED_DICTIONARY_NAMES = [
+          SPECKLE_BASE_OBJECT,
+          'IFC 4',
+          'IFC 2x3'
+        ].freeze
+
+        # @param entity [Sketchup::Entity] entity to get attribute dictionaries
+        def self.attribute_dictionaries_to_speckle(entity, model_preferences)
+          dictionaries = {}
+          return dictionaries unless model_preferences[INCLUDE_ENTITY_ATTRIBUTES]
+
+          klass = get_entity_setting_type(entity)
+          return dictionaries unless model_preferences[ENTITY_KEYS_FOR_INCLUDING_ATTRIBUTES[klass]]
+          return dictionaries if entity.attribute_dictionaries.nil?
+
+          entity.attribute_dictionaries.each do |att_dict|
+            dict_name = att_dict == '' ? 'empty_dictionary_name' : att_dict.name
+            dictionaries[dict_name] = att_dict.to_h unless IGNORED_DICTIONARY_NAMES.include?(att_dict.name)
+          end
+          dictionaries
+        end
+
+        # @param entity [Sketchup::Entity] entity to set attribute dictionaries
+        # rubocop:disable Metrics/CyclomaticComplexity
+        def self.attribute_dictionaries_to_native(entity, dictionaries)
+          return if dictionaries.nil?
+
+          classification_to_native(entity, dictionaries) if entity.is_a?(Sketchup::ComponentDefinition)
+
+          dictionaries.each do |dict_name, entries|
+            next unless entries.is_a?(Hash)
+
+            dict_name = dict_name == 'empty_dictionary_name' ? '' : dict_name
+            entries.each do |key, value|
+              set_attribute(entity, key, value, dict_name)
+            rescue StandardError => e
+              puts("Failed to write key: #{key} value: #{value} to dictionary #{dict_name}")
+              puts(e)
+            end
+          end
+        end
+        # rubocop:enable Metrics/CyclomaticComplexity
+
+        # Classification is ComponentDefinition specific, so they can be added only definition by add_classification
+        # method.
+        # @param definition_entity [Sketchup::ComponentDefinition] definition to add callback
+        def self.classification_to_native(definition_entity, dictionaries)
+          applied_schema_types = dictionaries['AppliedSchemaTypes']
+          return if applied_schema_types.nil?
+
+          applied_schema_types.each do |key, value|
+            definition_entity.add_classification(key, value)
+          end
+        end
+
+        # @return [String] the name of the dictionary to read from
+        def self.dictionary_name
+          SPECKLE_BASE_OBJECT
+        end
+
+        # Gets entity type for including entity attributes setting.
+        # @param entity [Sketchup::Entity] entity to find setting entity.
+        # @return [Sketchup::Face, Sketchup::Edge, Sketchup::Group, Sketchup::ComponentInstance]
+        def self.get_entity_setting_type(entity)
+          klass = entity.class
+          if entity.is_a?(Sketchup::ComponentDefinition)
+            klass = if entity.group?
+                      Sketchup::Group
+                    else
+                      Sketchup::ComponentInstance
+                    end
+          end
+          klass
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/dictionary/dictionary_handler.rb

@@ -1,61 +1,13 @@
 # frozen_string_literal: true
 
 require 'delegate'
+require_relative '../../constants/dict_constants'
 
 module SpeckleConnector
   module SketchupModel
     module Dictionary
       # Read and write attributes from the groups and other entities that represents Speckle objects on SketchUp model.
       class DictionaryHandler
-        DICTIONARY_NAME = 'Speckle_Base_Object'
-
-        IGNORED_DICTIONARY_NAMES = [
-          DICTIONARY_NAME,
-          'IFC 4',
-          'IFC 2x3'
-        ].freeze
-
-        # @param entity [Sketchup::Entity] entity to get attribute dictionaries
-        def self.attribute_dictionaries_to_speckle(entity)
-          dictionaries = {}
-          return dictionaries if entity.attribute_dictionaries.nil?
-
-          entity.attribute_dictionaries.each do |att_dict|
-            dict_name = att_dict == '' ? 'empty_dictionary_name' : att_dict.name
-            dictionaries[dict_name] = att_dict.to_h.to_json unless IGNORED_DICTIONARY_NAMES.include?(att_dict.name)
-          end
-          dictionaries
-        end
-
-        # @param entity [Sketchup::Entity] entity to set attribute dictionaries
-        def self.attribute_dictionaries_to_native(entity, dictionaries)
-          return if dictionaries.nil?
-
-          classification_to_native(entity, dictionaries) if entity.is_a?(Sketchup::ComponentDefinition)
-
-          dictionaries.each do |dict_name, entries|
-            dict_name = dict_name == 'empty_dictionary_name' ? '' : dict_name
-            JSON.parse(entries).each do |key, value|
-              set_attribute(entity, key, value, dict_name)
-            rescue StandardError => e
-              puts("Failed to write key: #{key} value: #{value} to dictionary #{dict_name}")
-              puts(e)
-            end
-          end
-        end
-
-        # Classification is ComponentDefinition specific, so they can be added only definition by add_classification
-        # method.
-        # @param definition_entity [Sketchup::ComponentDefinition] definition to add callback
-        def self.classification_to_native(definition_entity, dictionaries)
-          applied_schema_types = dictionaries['AppliedSchemaTypes']
-          return if applied_schema_types.nil?
-
-          JSON.parse(applied_schema_types).each do |key, value|
-            definition_entity.add_classification(key, value)
-          end
-        end
-
         # @param entity [Sketchup::Entity] the sketchup entity of Speckle object
         # @param key [Symbol] the name of the attribute
         # @param dictionary_name [String, Symbol] the name of the attribute dictionary
@@ -101,9 +53,15 @@ module SpeckleConnector
           dictionary.delete_key(key)
         end
 
+        # @param entity [Sketchup::Entity] the sketchup entity of Speckle object
+        # @param dictionary_name [String, Symbol] the name of the attribute dictionary to remove
+        def self.remove_dictionary(entity, dictionary_name = self.dictionary_name)
+          entity.attribute_dictionaries.delete(dictionary_name)
+        end
+
         # @return [String] the name of the dictionary to read from
         def self.dictionary_name
-          DICTIONARY_NAME
+          raise NotImplementedError 'Implement this in subclass'
         end
       end
     end

speckle_connector/src/sketchup_model/dictionary/speckle_entity_dictionary_handler.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require_relative 'dictionary_handler'
+require_relative 'base_dictionary_handler'
 require_relative '../../constants/dict_constants'
 require_relative '../../constants/type_constants'
 
@@ -9,22 +9,30 @@ module SpeckleConnector
     module Dictionary
       # Dictionary handler of the speckle entity.
       class SpeckleEntityDictionaryHandler < DictionaryHandler
+        DICTIONARY_NAME = SPECKLE_BASE_OBJECT
+
         # Writes initial data while speckle entity is creating first time.
         # @param sketchup_entity [Sketchup::Entity] Sketchup entity to write data into it's attribute dictionary.
         # rubocop:disable Metrics/ParameterLists
-        def self.write_initial_base_data(sketchup_entity, application_id, id, speckle_type, children_count, stream_id)
+        def self.write_initial_base_data(sketchup_entity, application_id, id, speckle_type, children, stream_id)
           initial_dict_data = {
             # Add here more if you want to write here initial data
             SPECKLE_ID => id,
             APPLICATION_ID => application_id,
             SPECKLE_TYPE => speckle_type,
-            TOTAL_CHILDREN_COUNT => children_count,
+            TOTAL_CHILDREN_COUNT => children.length,
+            CHILDREN => children,
             VALID_STREAM_IDS => [stream_id],
             INVALID_STREAM_IDS => []
           }
           set_hash(sketchup_entity, initial_dict_data)
         end
         # rubocop:enable Metrics/ParameterLists
+
+        # @return [String] the name of the dictionary to read from
+        def self.dictionary_name
+          DICTIONARY_NAME
+        end
       end
     end
   end

speckle_connector/src/sketchup_model/dictionary/speckle_model_dictionary_handler.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require_relative 'dictionary_handler'
+require_relative 'base_dictionary_handler'
 require_relative '../../constants/dict_constants'
 require_relative '../../constants/type_constants'
 
@@ -8,7 +8,7 @@ module SpeckleConnector
   module SketchupModel
     module Dictionary
       # Dictionary handler of the speckle model.
-      class SpeckleModelDictionaryHandler < DictionaryHandler
+      class SpeckleModelDictionaryHandler < BaseDictionaryHandler
         DICTIONARY_NAME = 'Speckle'
         # Writes initial data while speckle entity is creating first time.
         # @param sketchup_model [Sketchup::Model] Sketchup model to write data into it's attribute dictionary.

speckle_connector/src/sketchup_model/dictionary/speckle_schema_dictionary_handler.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'delegate'
+require_relative 'dictionary_handler'
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  module SketchupModel
+    module Dictionary
+      # Read and write attributes for Speckle objects' schema on SketchUp model.
+      class SpeckleSchemaDictionaryHandler < DictionaryHandler
+        def self.speckle_schema_to_speckle(entity)
+          schema = {}
+          return schema if entity.attribute_dictionaries.nil?
+
+          schema_dict = entity.attribute_dictionaries.find { |dict| dict.name == dictionary_name }
+          return schema if schema_dict.nil?
+
+          schema_dict.to_h
+        end
+
+        # @return [String] the name of the dictionary to read from
+        def self.dictionary_name
+          SPECKLE_MAPPING_TOOL_SCHEMA
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/materials/materials.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require_relative '../../constants/mat_constants'
+
 module SpeckleConnector
   # Operations related to {SketchupModel}.
   module SketchupModel
@@ -7,6 +9,10 @@ module SpeckleConnector
     class Materials
       def self.from_sketchup_model(model)
         materials = model.materials
+        materials = materials.select do |material|
+          !material.attribute_dictionaries.nil? &&
+            material.attribute_dictionaries.any? { |dict| dict.name == MAT_DICTIONARY }
+        end
         mat_hash = materials.collect { |material| [material.get_attribute(MAT_DICTIONARY, MAT_ID), material] }.to_h
         Materials.new(mat_hash)
       end

speckle_connector/src/sketchup_model/query/entity.rb

@@ -0,0 +1,113 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module SketchupModel
+    # Query operations in sketchup model.
+    module Query
+      # Queries for entity.
+      class Entity
+        class << self
+          # Creates flat list for entities that defined in classes property. It searches from top to bottom to collect
+          # entities.
+          # @param entities_to_flat [Sketchup::Entities] entities to flat their children, grandchildren and so on..
+          # @param classes [Array<Class>] objects types to collect as flat list.
+          def flat_entities(entities_to_flat,
+                            classes = [Sketchup::Edge, Sketchup::Face, Sketchup::ComponentInstance,
+                                       Sketchup::Group, Sketchup::ComponentDefinition])
+            entities = []
+            entities_to_flat.each do |entity|
+              entities.append(entity) if classes.include?(entity.class)
+              if entity.is_a?(Sketchup::Group) || entity.is_a?(Sketchup::ComponentInstance)
+                entities.append(entity.definition) if classes.include?(Sketchup::ComponentDefinition)
+                entities += flat_entities(entity.definition.entities, classes)
+              end
+            end
+            entities
+          end
+
+          # Create array for each entity with their path.
+          # @param entities_to_flat [Sketchup::Entities, Array<Sketchup::Entity>] entities to flat with their path.
+          # @param classes [Array<Class>] classes to flat. Put class into this array if you want to find their paths.
+          # @param path [Array<Object>] path for entity that we are in.
+          # @return [Array<Object>] entity with it's path as flat array. See example.
+          # @example
+          #   path[0] is entity itself
+          #   path[1..-1] rest as path from top to bottom
+          def flat_entities_with_path(entities_to_flat,
+                                      classes = [Sketchup::Edge, Sketchup::Face, Sketchup::ComponentInstance,
+                                                 Sketchup::Group, Sketchup::ComponentDefinition],
+                                      path = [])
+            entities = []
+            entities_to_flat.each do |entity|
+              # Collect object itself
+              entities.append([entity] + path) if classes.include?(entity.class)
+              # entities[entity] = path if classes.include?(entity.class) && entities[entity].nil?
+
+              # Skip unless entity is a container entity like group or component.
+              next unless entity.is_a?(Sketchup::Group) || entity.is_a?(Sketchup::ComponentInstance)
+
+              # Add entity definition also with it's path.
+              entities[entity.definition] = path if classes.include?(Sketchup::ComponentDefinition)
+              # Collect sub-objects if object is a container at the same time.
+              sub_entities = flat_entities_with_path(entity.definition.entities.to_a,
+                                                     classes, path + [entity])
+              entities += sub_entities
+            end
+            entities
+          end
+
+          # Calculates global transformation of entity by multiplying path entries from bottom to top by reversing path.
+          # @param entity [Sketchup::Entity] entity to find global transformation.
+          # @param path [Array<Object>] path that parents of entity that has transformation value to calculate global
+          #  transformation of the entity.
+          # @return [Geom::Transformation] global transformation of the entity.
+          def global_transformation(entity, path)
+            # If entity is face, use Identity
+            global = entity.respond_to?(:transformation) ? entity.transformation : Geom::Transformation.new
+            path.reverse.each do |local|
+              global = local.transformation * global if local.respond_to?(:transformation)
+            end
+            global
+          end
+
+          # Global transformation search for entity that lies on only one instance.
+          # @param entity [Sketchup::Entity] entity to find global transformation.
+          def global_transformation_from_bottom(entity)
+            # If entity is face, use Identity
+            transformation = entity.respond_to?(:transformation) ? entity.transformation : Geom::Transformation.new
+            parent = parent_or_model(entity)
+            until parent.is_a?(Sketchup::Model) || parent.nil?
+              transformation = parent.transformation * transformation
+              parent = parent_or_model(parent)
+            end
+            transformation
+          end
+
+          # Parent search for entity from bottom to top. It is not ideal if entity lives in different instances.
+          def parent_or_model(entity)
+            parent = entity.parent
+            return parent if parent.is_a?(Sketchup::Model)
+
+            instances = parent.instances
+            if instances.length > 1
+              puts 'Parent has more than one instance'
+              instances.each(&:make_unique)
+              instances = instances.select { |instance| instance.definition.entities.include?(entity) }
+            end
+            instances.first
+          end
+
+          # Finds first material of parents from bottom to top.
+          def parent_material(path)
+            material = nil
+            path.reverse.each do |local|
+              material = local.material if local.respond_to?(:material)
+              return material unless material.nil?
+            end
+            material
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/query/layer.rb

@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module SketchupModel
+    # Query operations in sketchup model.
+    module Query
+      # Queries for layer and it's parents.
+      class Layer
+        class << self
+          # @param layer [Sketchup::Layer] layer to get folder path of the layer
+          # @return [Array<Sketchup::Folder>] path of the layer
+          def path(layer)
+            parent_folders = []
+            folder = layer.folder
+            until folder.nil?
+              parent_folders.append(folder)
+              folder = folder.folder
+            end
+            parent_folders.reverse
+          end
+
+          # @param entity [Sketchup::Entity] entity to find path.
+          def entity_path(entity, separation = '::')
+            path = path(entity.layer)
+            full_path = path.append(entity.layer)
+            full_path_string = ''
+            full_path.each_with_index do |layer, i|
+              full_path_string += layer.display_name
+              full_path_string += separation unless i == full_path.length - 1
+            end
+            full_path_string
+          end
+
+          # @param string_layer_path [String] string layer path to split.
+          def entity_layer_from_path(string_layer_path, separation = '::')
+            return string_layer_path if string_layer_path.nil?
+
+            string_layer_path.split(separation).last
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/reader/mapper_reader.rb

@@ -0,0 +1,95 @@
+# frozen_string_literal: true
+
+require_relative '../dictionary/speckle_schema_dictionary_handler'
+require_relative '../../speckle_entities/speckle_entity'
+require_relative '../../mapper/category/revit_category'
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Reader model for sketchup model.
+    module Reader
+      # Reader module for mapper.
+      module MapperReader
+        # @param entities [Sketchup::Entities] entities to collect mapped entities.
+        # @return [Hash{String=>Sketchup::Entity}] mapped entities with persistent id.
+        def self.read_mapped_entities(entities)
+          mapped_entities = {}
+          Query::Entity.flat_entities(entities).each do |entity|
+            mapped_entities[entity.persistent_id] = entity if mapped_with_schema?(entity)
+          end
+          mapped_entities
+        end
+
+        # @param entity [Sketchup::Entity] sketchup entity to check whether mapped with speckle schema or not.
+        def self.mapped_with_schema?(entity)
+          is_entity_mapped = !Dictionary::SpeckleSchemaDictionaryHandler.attribute_dictionary(entity).nil?
+          return is_entity_mapped if is_entity_mapped
+          return is_entity_mapped unless entity.is_a?(Sketchup::ComponentInstance)
+
+          !Dictionary::SpeckleSchemaDictionaryHandler.attribute_dictionary(entity.definition).nil?
+        end
+
+        def self.get_schema(entity)
+          Dictionary::SpeckleSchemaDictionaryHandler.speckle_schema_to_speckle(entity)
+        end
+
+        def self.entities_schema_details(entities)
+          entities.collect do |entity|
+            entity_selection_details = entity_selection_details(entity)
+            if entity.is_a?(Sketchup::ComponentInstance)
+              entity_selection_details = entity_selection_details.merge(
+                { definition: entity_selection_details(entity.definition) }
+              )
+            end
+            entity_selection_details
+          end
+        end
+
+        def self.entity_selection_details(entity)
+          sanitized_type = entity.class.name.split('::').last.gsub(/(?<=[a-z])(?=[A-Z])/, ' ').split
+          is_definition = entity.is_a?(Sketchup::ComponentDefinition)
+          entity_type = is_definition ? sanitized_type.last : sanitized_type.first
+          speckle_schema = get_schema(entity)
+          {
+            name: speckle_schema['name'],
+            entityName: entity.respond_to?(:name) ? entity.name : '',
+            entityId: entity.persistent_id,
+            entityType: entity_type,
+            schema: speckle_schema,
+            numberOfInstances: is_definition ? entity.instances.length : 1
+          }
+        end
+
+        def self.mapped_entity_details(entities)
+          reverse_category_dictionary = Mapper::Category::RevitCategory.reverse_dictionary
+          entities.collect do |entity|
+            speckle_schema = get_schema(entity)
+            speckle_schema_definition = entity.respond_to?(:definition) ? get_schema(entity.definition) : nil
+            entity_type = entity.class.name.split('::').last.gsub(/(?<=[a-z])(?=[A-Z])/, ' ').split.first
+            category = get_map_attribute(speckle_schema, speckle_schema_definition, 'category')
+            {
+              name: get_map_attribute(speckle_schema, speckle_schema_definition, 'name'),
+              category: category,
+              categoryName: category.nil? ? '' : reverse_category_dictionary[category],
+              method: get_map_attribute(speckle_schema, speckle_schema_definition, 'method'),
+              entityName: entity.respond_to?(:name) ? entity.name : '',
+              entityId: entity.persistent_id,
+              entityType: entity.is_a?(Sketchup::ComponentDefinition) ? 'Definition' : entity_type,
+              schema: speckle_schema,
+              definitionSchema: speckle_schema_definition
+            }
+          end
+        end
+
+        def self.get_map_attribute(schema, definition_schema, attribute)
+          return schema[attribute] if schema[attribute]
+          return definition_schema[attribute] if !definition_schema.nil? && definition_schema[attribute]
+
+          nil
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/reader/speckle_entities_reader.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+require_relative '../dictionary/speckle_schema_dictionary_handler'
+require_relative '../../speckle_entities/speckle_entity'
+require_relative '../../mapper/category/revit_category'
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Reader model for sketchup model.
+    module Reader
+      # Reader module for speckle entities.
+      module SpeckleEntitiesReader
+        # @param entities [Sketchup::Entities] entities to collect speckle entities.
+        # @return [Hash{String=>Sketchup::Entity}] speckle entities with persistent id.
+        def self.read(entities)
+          speckle_entities = {}
+          entities.each do |entity|
+            speckle_entities[entity.persistent_id] = read_speckle_entity(entity) if speckle_entity?(entity)
+            next unless entity.is_a?(Sketchup::Group) || entity.is_a?(Sketchup::ComponentInstance)
+
+            if speckle_entity?(entity.definition)
+              speckle_entities[entity.definition.persistent_id] = read_speckle_entity(entity.definition)
+            end
+            definition_speckle_entities = read(entity.definition.entities)
+            speckle_entities = speckle_entities.merge(definition_speckle_entities)
+          end
+          speckle_entities
+        end
+
+        # @param entity [Sketchup::Entity] sketchup entity to read from attribute dictionary.
+        def self.read_speckle_entity(entity)
+          dict = entity.attribute_dictionaries.to_a.find { |d| d.name == SPECKLE_BASE_OBJECT }
+          speckle_id = dict[:speckle_id]
+          application_id = dict[:application_id]
+          speckle_type = dict[:speckle_type]
+          children = dict[:children]
+          valid_stream_ids = dict[:valid_stream_ids]
+          invalid_stream_ids = dict[:invalid_stream_ids]
+          SpeckleEntities::SpeckleEntity.new(entity, speckle_id, application_id, speckle_type, children,
+                                             valid_stream_ids, invalid_stream_ids)
+        end
+
+        # @param entity [Sketchup::Entity] sketchup entity to check if it was speckle entity once.
+        def self.speckle_entity?(entity)
+          return false if entity.attribute_dictionaries.nil?
+          return false if entity.attribute_dictionaries.to_a.empty?
+
+          entity.attribute_dictionaries.to_a.any? { |dict| dict.name == SPECKLE_BASE_OBJECT }
+        end
+
+
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/utils/face_utils.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require_relative '../../constants/geo_constants'
+
 module SpeckleConnector
   # Operations related to {SketchupModel}.
   module SketchupModel
@@ -24,6 +26,13 @@ module SpeckleConnector
           end
           adj_faces.uniq
         end
+
+        # @param face [Sketchup::Face] face to get max z distance for all vertices.
+        def self.max_z(face)
+          points = face.vertices.collect(&:position)
+          points_z_values = points.collect(&:z)
+          points_z_values.max - points_z_values.min
+        end
       end
     end
   end

speckle_connector/src/sketchup_model/utils/plane_utils.rb

@@ -0,0 +1,84 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Works directly with/on SketchUp Entities of different kinds (Groups, Faces, Edges, ...).
+    module Utils
+      # Static methods to do plane calculations with sketchup geom objects like Point3d and Vector3d.
+      class Plane
+        LENGTH_TOLERANCE = 1e-8
+
+        # Create plane from 3 points
+        # @param origin [Geom::Point3d] the point on the plane that wil become the origin of the local coordinate system
+        # @param point_1 [Geom::Point3d] the point that defines first direction
+        # @param point_2 [Geom::Point3d] the third point on the plane
+        # @return [Plane] the parametrization of the plane that goes through the given points
+        def self.from_points(origin, point_1, point_2)
+          direction_x = origin.vector_to(point_1).normalize
+          direction_x = direction_x.normalize
+          normal = direction_x.cross(origin.vector_to(point_2))
+          direction_y = direction_x.cross(normal.normalize)
+          new(origin: origin, direction_u: direction_x, direction_v: direction_y)
+        end
+
+        # @return [Geom::Vector3d] the direction of the u-axis on the plane
+        attr_reader :direction_u
+
+        # @return [Geom::Vector3d] the direction of the v-axis on the plane
+        attr_reader :direction_v
+
+        # @return [Geom::Point3d] the origin of the local coordinate system on the plane
+        attr_reader :origin
+
+        # @param origin [Geom::Point3d] the origin of the coordinate system on the plane
+        # @param direction_u [Geom::Vector3d] the direction of the x-axis
+        # @param direction_v [Geom::Vector3d] the direction of the y-axis
+        def initialize(origin:, direction_u:, direction_v:)
+          @origin = origin
+          @direction_u = direction_u
+          @direction_v = direction_v
+        end
+
+        # Get the point object in global coordinates for the point on the plane with local coordinates (u,v).
+        # @param coordinate_u [Float] the u-coordinate on the plane
+        # @param coordinate_v [Float] the v-coordinate on the plane
+        # @return [Geom::Point3d] the point in space that corresponds to the given (u, v) coordinates
+        def point_at(coordinate_u, coordinate_v)
+          scaled_direction_u = Geom::Vector3d.new(direction_u.x * coordinate_u,
+                                                  direction_u.y * coordinate_u,
+                                                  direction_u.z * coordinate_u)
+          scaled_direction_v = Geom::Vector3d.new(direction_v.x * coordinate_v,
+                                                  direction_v.y * coordinate_v,
+                                                  direction_v.z * coordinate_v)
+          origin + scaled_direction_u + scaled_direction_v
+        end
+
+        # Find local (u, v) coordinates of the projection of the given point to the plane
+        # @param point [Geom::Point3d] the point that will be projected to the plane
+        # @return [(Float, Float)] the local coordinates on the plane that correspond to the projected point
+        def plane_coordinates(point)
+          origin_to_point = origin.vector_to(point)
+          coordinate_u = origin_to_point.dot(direction_u)
+          coordinate_v = origin_to_point.dot(direction_v)
+          [coordinate_u, coordinate_v]
+        end
+
+        # Project a given point to the plane
+        # @param point [Geom::Point3d] the point that will be projected to the plane
+        # @return [Geom::Point3d] the projected point on the plane
+        def project_to_plane(point)
+          coordinate_u, coordinate_v = plane_coordinates(point)
+          point_at(coordinate_u, coordinate_v)
+        end
+
+        # Check if the given point lies on the plane
+        # @param point [Geom::Point3d] the point to check
+        # @return [Boolean] whether the point lies on the plane
+        def on_plane?(point)
+          point.distance(project_to_plane(point)).to_m < LENGTH_TOLERANCE
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_entities/speckle_block_definition_entity.rb

@@ -1,23 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'speckle_entity'
-require_relative '../immutable/immutable'
-
-module SpeckleConnector
-  module SpeckleEntities
-    # Speckle block definition entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    class SpeckleBlockDefinitionEntity < SpeckleEntities::SpeckleEntity
-      include Immutable::ImmutableUtils
-
-      # @return [Hash{String=>SpeckleObjects::Base}] speckle objects belongs to block instance
-      attr_reader :children
-
-      def initialize(sketchup_group_or_component_instance, traversed_speckle_object, stream_id)
-        @children = traversed_speckle_object[:__closure].nil? ? {} : traversed_speckle_object[:__closure]
-        super(sketchup_group_or_component_instance, traversed_speckle_object, children, stream_id)
-      end
-
-      alias sketchup_edge sketchup_entity
-    end
-  end
-end

speckle_connector/src/speckle_entities/speckle_block_instance_entity.rb

@@ -1,27 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'speckle_entity'
-require_relative '../immutable/immutable'
-
-module SpeckleConnector
-  module SpeckleEntities
-    # Speckle block instance entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    class SpeckleBlockInstanceEntity < SpeckleEntities::SpeckleEntity
-      include Immutable::ImmutableUtils
-
-      # @return [Hash{String=>SpeckleObjects::Base}] speckle objects belongs to block instance
-      attr_reader :children
-
-      # @return [Boolean] whether block instance represented as sketchup group or component instance
-      attr_reader :is_sketchup_group
-
-      def initialize(sketchup_group_or_component_instance, traversed_speckle_object, stream_id)
-        @children = traversed_speckle_object[:__closure].nil? ? {} : traversed_speckle_object[:__closure]
-        @is_sketchup_group = traversed_speckle_object[:is_sketchup_group]
-        super(sketchup_group_or_component_instance, traversed_speckle_object, children, stream_id)
-      end
-
-      alias sketchup_edge sketchup_entity
-    end
-  end
-end

speckle_connector/src/speckle_entities/speckle_entities.rb

@@ -1,36 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'speckle_entity'
-require_relative 'speckle_line_entity'
-require_relative 'speckle_mesh_entity'
-require_relative 'speckle_block_instance_entity'
-require_relative 'speckle_block_definition_entity'
-
-module SpeckleConnector
-  # Speckle entities are the state holder objects to achieve diffing, caching and updating.
-  # They are created whenever user send/receive objects between SketchUp and Speckle XYZ server.
-  # When Sketchup Entity is sent, by checking objects attributes, allow us to understand this object is sent previously?
-  #   If yes, then use it for caching purpose only if object hasn't changed since it's previous sent state.
-  #   If object has sent before but changed after, then update the SpeckleEntity with new traversed object.
-  #   If no, then create SpeckleEntity and add it to the SpeckleState to check later.
-  module SpeckleEntities
-    # Speckle entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    def self.with_converted(skp_entity, traversed, stream_id)
-      # return the same object if it is already SpeckleEntity
-      return skp_entity if skp_entity.is_a?(SpeckleEntity)
-      return SpeckleBlockInstanceEntity.new(skp_entity, traversed, stream_id) if skp_entity.is_a?(Sketchup::Group)
-
-      if skp_entity.is_a?(Sketchup::ComponentInstance)
-        return SpeckleBlockInstanceEntity.new(skp_entity, traversed,
-                                              stream_id)
-      end
-      if skp_entity.is_a?(Sketchup::ComponentDefinition)
-        return SpeckleBlockDefinitionEntity.new(skp_entity, traversed,
-                                                stream_id)
-      end
-      return SpeckleMeshEntity.new(skp_entity, traversed, stream_id) if skp_entity.is_a?(Sketchup::Face)
-
-      SpeckleLineEntity.new(skp_entity, traversed, stream_id) if skp_entity.is_a?(Sketchup::Edge)
-    end
-  end
-end

speckle_connector/src/speckle_entities/speckle_entity.rb

@@ -13,9 +13,6 @@ module SpeckleConnector
       # @return [Sketchup::Entity] Sketchup Entity represents {SpeckleEntity} on the model.
       attr_reader :sketchup_entity
 
-      # @return [SpeckleObjects::Base] Speckle object that represented on server.
-      attr_reader :speckle_object
-
       # @return [String] Speckle object type.
       attr_reader :speckle_type
 
@@ -43,27 +40,27 @@ module SpeckleConnector
       attr_reader :source_material, :active_diffing_stream_id
 
       # @param sketchup_entity [Sketchup::Entity] sketchup entity represents {SpeckleEntity} on the model.
-      def initialize(sketchup_entity, traversed_speckle_object, children, stream_id)
+      # rubocop:disable Metrics/ParameterLists
+      def initialize(sketchup_entity, speckle_id, application_id, speckle_type, children, valid_stream_ids,
+                     invalid_stream_ids = [])
         @status = SpeckleEntityStatus::UP_TO_DATE
         @source_material = sketchup_entity.material
         @active_diffing_stream_id = nil
-        @valid_stream_ids = [stream_id]
-        @invalid_stream_ids = []
+        @valid_stream_ids = valid_stream_ids
+        @invalid_stream_ids = invalid_stream_ids
         @sketchup_entity = sketchup_entity
-        @application_id = @sketchup_entity.persistent_id
-        @id = traversed_speckle_object[:id]
-        @total_children_count = traversed_speckle_object[:totalChildrenCount]
-        @speckle_object = traversed_speckle_object
-        @speckle_type = speckle_object[:speckle_type]
-        @speckle_children_objects = children
+        @application_id = application_id
+        @id = speckle_id
+        @total_children_count = children.nil? ? 0 : children.length
+        @speckle_type = speckle_type
+        @speckle_children_objects = children.nil? ? [] : children
+      end
+      # rubocop:enable Metrics/ParameterLists
+
+      def write_initial_base_data
         SketchupModel::Dictionary::SpeckleEntityDictionaryHandler
           .write_initial_base_data(@sketchup_entity, application_id, id, speckle_type,
-                                   @speckle_children_objects.length, stream_id)
-
-        # FIXME: Understand why below condition does not match for same cases. I guess it is a typo bug.
-        # unless total_children_count == speckle_children_objects.length
-        #   raise StandardError "total children count mismatch for #{application_id}"
-        # end
+                                   @speckle_children_objects, valid_stream_ids.first)
       end
 
       def with_up_to_date
@@ -122,6 +119,41 @@ module SpeckleConnector
       def valid?
         sketchup_entity.valid?
       end
+
+      # @param state [States::State] state of the application
+      # rubocop:disable Metrics/PerceivedComplexity
+      # rubocop:disable Metrics/CyclomaticComplexity
+      def self.from_speckle_object(state, speckle_object, entities, stream_id)
+        return state, [] if entities.empty?
+
+        speckle_id = speckle_object['id']
+        application_id = speckle_object['applicationId']
+        speckle_type = speckle_object['speckle_type']
+        children = speckle_object['__closure'].nil? ? [] : speckle_object['__closure']
+        speckle_state = state.speckle_state
+        entities.each do |entity|
+          next if entity.is_a?(Sketchup::Material) || entity.is_a?(Sketchup::Page)
+          next if (entity.is_a?(Sketchup::Face) || entity.is_a?(Sketchup::Edge)) &&
+                  !state.user_state.user_preferences[:register_speckle_entity]
+
+          if entity.is_a?(Sketchup::ComponentDefinition)
+            definition = speckle_object['definition'] || speckle_object['@block_definition'] ||
+              speckle_object['block_definition']
+            if definition
+              speckle_id = definition['id']
+              speckle_type = definition['speckle_type']
+            end
+          end
+
+          ent = SpeckleEntity.new(entity, speckle_id, application_id, speckle_type, children, [stream_id])
+          ent.write_initial_base_data
+          speckle_state = speckle_state.with_speckle_entity(ent)
+        end
+        new_state = state.with_speckle_state(speckle_state)
+        return new_state, entities
+      end
+      # rubocop:enable Metrics/PerceivedComplexity
+      # rubocop:enable Metrics/CyclomaticComplexity
     end
   end
 end

speckle_connector/src/speckle_entities/speckle_line_entity.rb

@@ -1,23 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'speckle_entity'
-require_relative '../immutable/immutable'
-
-module SpeckleConnector
-  module SpeckleEntities
-    # Speckle line entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    class SpeckleLineEntity < SpeckleEntities::SpeckleEntity
-      include Immutable::ImmutableUtils
-
-      # @return [Hash{String=>SpeckleObjects::Base}] speckle objects belongs to edge
-      attr_reader :children
-
-      def initialize(sketchup_edge, traversed_speckle_object, stream_id)
-        @children = traversed_speckle_object[:__closure].nil? ? {} : traversed_speckle_object[:__closure]
-        super(sketchup_edge, traversed_speckle_object, children, stream_id)
-      end
-
-      alias sketchup_edge sketchup_entity
-    end
-  end
-end

speckle_connector/src/speckle_entities/speckle_mesh_entity.rb

@@ -1,23 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'speckle_entity'
-require_relative '../immutable/immutable'
-
-module SpeckleConnector
-  module SpeckleEntities
-    # Speckle mesh entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    class SpeckleMeshEntity < SpeckleEntities::SpeckleEntity
-      include Immutable::ImmutableUtils
-
-      # @return [Hash{String=>SpeckleObjects::Base}] speckle objects belongs to edge
-      attr_reader :children
-
-      def initialize(sketchup_face, traversed_speckle_object, stream_id)
-        @children = traversed_speckle_object[:__closure].nil? ? {} : traversed_speckle_object[:__closure]
-        super(sketchup_face, traversed_speckle_object, children, stream_id)
-      end
-
-      alias sketchup_edge sketchup_entity
-    end
-  end
-end

speckle_connector/src/speckle_objects/built_elements/default_floor.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../built_elements/revit/parameter'
+require_relative '../other/render_material'
+require_relative '../geometry/line'
+require_relative '../geometry/polyline'
+require_relative '../../constants/type_constants'
+require_relative '../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # Default Floor object.
+      class DefaultFloor < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_DEFAULT_FLOOR
+
+        def initialize(outline:, voids:, units:, material:, application_id: nil)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: nil
+          )
+          self[:outline] = outline
+          self[:voids] = voids
+          self[:units] = units
+          self[:renderMaterial] = material
+        end
+
+        # @param face [Sketchup::Face] face to get speckle schema for floor.
+        def self.to_speckle_schema(face, units, global_transformation: nil)
+          outline = Geometry::Polyline.from_loop(face.loops.first, units, global_transformation: global_transformation)
+          voids = []
+          if face.loops.length > 1
+            voids = face.loops[1..face.loops.length - 1].collect do |loop|
+              Geometry::Polyline.from_loop(loop, units, global_transformation: global_transformation)
+            end
+          end
+          material = face.material || face.back_material
+
+          DefaultFloor.new(
+            outline: outline,
+            voids: voids,
+            units: units,
+            material: material.nil? ? nil : Other::RenderMaterial.from_material(face.material || face.back_material),
+            application_id: face.persistent_id
+          )
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/default_wall.rb

@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../built_elements/revit/parameter'
+require_relative '../other/render_material'
+require_relative '../geometry/length'
+require_relative '../geometry/line'
+require_relative '../geometry/polyline'
+require_relative '../../constants/type_constants'
+require_relative '../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+require_relative '../../sketchup_model/utils/face_utils'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # Default Wall object.
+      class DefaultWall < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_DEFAULT_WALL
+
+        def initialize(base_line:, height:, flipped:, units:, material:, application_id: nil)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: nil
+          )
+          self[:baseLine] = base_line
+          self[:height] = height
+          self[:flipped] = flipped
+          self[:units] = units
+          self[:renderMaterial] = material
+        end
+
+        # @param face [Sketchup::Face] face to get speckle schema for floor.
+        def self.to_speckle_schema(face, units, global_transformation: nil)
+          base_line = Geometry::Line.base_line_from_face(face, units, global_transformation: global_transformation)
+
+          material = face.material || face.back_material
+
+          DefaultWall.new(
+            base_line: base_line,
+            height: Geometry.length_to_speckle(SketchupModel::Utils::FaceUtils.max_z(face), units),
+            flipped: false,
+            units: units,
+            material: material.nil? ? nil : Other::RenderMaterial.from_material(face.material || face.back_material),
+            application_id: face.persistent_id
+          )
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/level.rb

@@ -0,0 +1,84 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../other/render_material'
+require_relative '../geometry/line'
+require_relative '../geometry/length'
+require_relative '../geometry/polyline'
+require_relative '../../constants/type_constants'
+require_relative '../../sketchup_model/dictionary/speckle_entity_dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # Level object.
+      class Level < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_LEVEL
+
+        def initialize(name:, elevation:, units:, element_id:, application_id: nil, id: nil)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: id
+          )
+          self[:name] = name
+          self[:elevation] = elevation
+          self[:units] = units
+          self[:elementId] = element_id
+          self[:referenceOnly] = true
+          self[:createView] = false
+        end
+
+        # @param state [States::State] state of the application.
+        def self.to_native(state, speckle_level, stream_id)
+          sketchup_model = state.sketchup_state.sketchup_model
+          levels_layer = sketchup_model.layers.layers.find { |layer| layer.display_name == 'Levels' }
+          levels_layer = sketchup_model.layers.add('Levels') if levels_layer.nil?
+
+          name = speckle_level['name']
+          elevation = speckle_level['elevation']
+          units = speckle_level['units']
+          element_id = speckle_level['elementId']
+          application_id = speckle_level['applicationId']
+          id = speckle_level['id']
+
+          skp_elevation = Geometry.length_to_native(elevation, units)
+
+          definition_name = "#{name}-#{application_id}"
+          definition = sketchup_model.definitions.find { |definition| definition.name == definition_name }
+          definition.entities.clear! unless definition.nil?
+          definition = sketchup_model.definitions.add(definition_name) if definition.nil?
+          instance = sketchup_model.entities.add_instance(definition, Geom::Transformation.new)
+          instance.locked = true
+          SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.write_initial_base_data(
+            instance, application_id, id, SPECKLE_TYPE, [], stream_id
+          )
+          SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.set_attribute(instance, :name, name)
+
+          SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.write_initial_base_data(
+            definition, application_id, id, SPECKLE_TYPE, [], stream_id
+          )
+          SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.set_attribute(definition, :name, name)
+
+          c1_e = Geom::Point3d.new(0, 10.m, skp_elevation)
+          c2_e = Geom::Point3d.new(0, 0, skp_elevation)
+          c3_e = Geom::Point3d.new(10.m, 0, skp_elevation)
+          cline_1 = definition.entities.add_cline(c1_e, c2_e)
+          cline_2 = definition.entities.add_cline(c2_e, c3_e)
+          text = definition.entities.add_text(" #{name}", c1_e)
+          [cline_1, cline_2, text, definition, instance].each { |o| o.layer = levels_layer }
+
+          Level.new(
+            name: name,
+            elevation: elevation,
+            units: units,
+            element_id: element_id,
+            application_id: application_id,
+            id: speckle_level['id']
+          )
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/network.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # Network object represents scenes on Sketchup.
+      class Network < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_NETWORK
+
+        def self.to_native(state, network, layer, entities, &convert_to_native)
+          network['elements'].each do |element|
+            state, _converted_entities = convert_to_native.call(state, element['elements'], layer, entities)
+          end
+
+          return state, []
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/revit/direct_shape.rb

@@ -0,0 +1,145 @@
+# frozen_string_literal: true
+
+require_relative '../../base'
+require_relative '../../other/render_material'
+require_relative '../../other/block_instance'
+require_relative '../../other/block_definition'
+require_relative '../../other/transform'
+require_relative '../../../constants/type_constants'
+require_relative '../../../sketchup_model/query/entity'
+require_relative '../../../sketchup_model/reader/mapper_reader'
+require_relative '../../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      module Revit
+        # Direct shape definition for Revit mappings.
+        class DirectShape < Base
+          SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_DIRECTSHAPE
+          READER = SketchupModel::Reader
+          QUERY = SketchupModel::Query
+          DICTIONARY = SketchupModel::Dictionary
+
+          def initialize(name:, category:, units:, base_geometries:, application_id: nil)
+            super(
+              speckle_type: SPECKLE_TYPE,
+              total_children_count: 0,
+              application_id: application_id,
+              id: nil
+            )
+            self[:name] = name
+            self[:category] = category
+            self[:units] = units
+            self[:baseGeometries] = base_geometries
+          end
+
+          def self.get_direct_shape_name(direct_shape)
+            if direct_shape['name'] == ''
+              direct_shape['applicationId'].to_s
+            else
+              "#{direct_shape['name']}::#{direct_shape['applicationId']}"
+            end
+          end
+
+          # @param state [States::State] state of the application.
+          def self.to_native(state, direct_shape, layer, entities, &convert_to_native)
+            direct_shape['geometry'] = direct_shape['baseGeometries']
+            direct_shape['name'] = get_direct_shape_name(direct_shape)
+
+            state, _definitions = Other::BlockDefinition.to_native(
+              state, direct_shape, layer, entities, &convert_to_native
+            )
+
+            definition = state.sketchup_state.sketchup_model
+                              .definitions[Other::BlockDefinition.get_definition_name(direct_shape)]
+
+            instance = entities.add_instance(definition, Geom::Transformation.new)
+            instance.name = direct_shape['name'] unless direct_shape['name'].nil?
+            DICTIONARY::SpeckleSchemaDictionaryHandler.set_hash(
+              instance,
+              {
+                name: direct_shape['name'], category: direct_shape['category'], method: 'Direct Shape'
+              }
+            )
+            new_speckle_state = state.speckle_state.with_mapped_entity(instance)
+            state = state.with_speckle_state(new_speckle_state)
+            instance.layer = layer unless layer.nil?
+
+            return state, [instance, definition]
+          end
+
+          # Collects direct shapes on selection as flat list.
+          def self.direct_shapes_on_selection(sketchup_model)
+            flat_selection_with_path = QUERY::Entity.flat_entities_with_path(
+              sketchup_model.selection,
+              [Sketchup::Face, Sketchup::ComponentInstance, Sketchup::Group], [sketchup_model]
+            )
+            mapped_selection = []
+            flat_selection_with_path.each do |entities|
+              entity = entities[0]
+              is_entity_mapped = READER::MapperReader.mapped_with_schema?(entity)
+              if entity.respond_to?(:definition)
+                is_definition_mapped = READER::MapperReader.mapped_with_schema?(entity.definition)
+                mapped_selection.append(entities) if is_entity_mapped || is_definition_mapped
+                next
+              end
+              mapped_selection.append(entities) if is_entity_mapped
+            end
+            mapped_selection
+          end
+
+          def self.from_entity(speckle_state, entity, path, units, model_preferences)
+            schema = DICTIONARY::SpeckleSchemaDictionaryHandler.attribute_dictionary(entity)
+            if schema.nil? && entity.respond_to?(:definition)
+              schema = DICTIONARY::SpeckleSchemaDictionaryHandler.attribute_dictionary(entity.definition)
+            end
+            entities_with_path = []
+            entities_with_path.append([entity] + path) if entity.is_a?(Sketchup::Face) || entity.is_a?(Sketchup::Edge)
+            # Collect here flat list
+            if entity.is_a?(Sketchup::ComponentInstance) || entity.is_a?(Sketchup::Group)
+              entities_with_path += QUERY::Entity
+                                    .flat_entities_with_path(
+                                      entity.definition.entities, [Sketchup::Face], path.append(entity)
+                                    )
+            end
+            base_geometries = group_faces_under_mesh_by_material(speckle_state, entities_with_path, units, model_preferences)
+            DirectShape.new(
+              name: schema[:name], category: schema[:category], units: units,
+              base_geometries: base_geometries, application_id: entity.persistent_id
+            )
+          end
+
+          # rubocop:disable Metrics/MethodLength
+          def self.group_faces_under_mesh_by_material(speckle_state, faces_with_path, units, model_preferences)
+            mesh_groups = {}
+            faces_with_path.each do |face_with_path|
+              face = face_with_path[0]
+              entity_path = face_with_path[1..-1]
+              parent_material = QUERY::Entity.parent_material(entity_path)
+              mesh_group_id = Geometry::Mesh.get_mesh_group_id(face, model_preferences, parent_material)
+
+              if mesh_groups.key?(mesh_group_id)
+                mesh_group = mesh_groups[mesh_group_id]
+                mesh_group[0].face_to_mesh(face, QUERY::Entity.global_transformation(face, entity_path))
+                mesh_group[1].append(face)
+              else
+                mesh = Geometry::Mesh.from_face(
+                  speckle_state: speckle_state,
+                  face: face, units: units, model_preferences: model_preferences,
+                  global_transform: QUERY::Entity.global_transformation(face, entity_path),
+                  parent_material: parent_material
+                )
+                mesh_groups[mesh_group_id] = [mesh, [face]]
+              end
+            end
+            # Update mesh overwrites points and polygons into base object.
+            mesh_groups.each { |_, mesh| mesh.first.update_mesh }
+            mesh_groups.values
+          end
+          # rubocop:enable Metrics/MethodLength
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/revit/family_instance.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require_relative '../../base'
+require_relative '../../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      module Revit
+        # Family instance for Revit mappings.
+        class FamilyInstance < Base
+          SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_FAMILY_INSTANCE
+          READER = SketchupModel::Reader
+          QUERY = SketchupModel::Query
+          DICTIONARY = SketchupModel::Dictionary
+
+          # rubocop:disable Metrics/ParameterLists
+          def initialize(family:, type:, level:, units:, base_point:, rotation:, application_id: nil)
+            super(
+              speckle_type: SPECKLE_TYPE,
+              total_children_count: 0,
+              application_id: application_id,
+              id: nil
+            )
+            self[:family] = family
+            self[:type] = type
+            self[:level] = level
+            self[:units] = units
+            self[:basePoint] = base_point
+            self[:rotation] = rotation
+          end
+          # rubocop:enable Metrics/ParameterLists
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/revit/parameter.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require_relative '../../base'
+require_relative '../../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      module Revit
+        # Revit parameter.
+        class Parameter < Base
+          SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_PARAMETER
+          def initialize(name:, application_id: nil)
+            super(
+              speckle_type: SPECKLE_TYPE,
+              total_children_count: 0,
+              application_id: application_id,
+              id: id
+            )
+            self[:name] = name
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/revit/revit_element_type.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require_relative '../../base'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      module Revit
+        # Revit element type.
+        class RevitElementType < Base
+          SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_REVITELEMENTTYPE
+
+          # rubocop:disable Metrics/ParameterLists
+          def initialize(category:, family:, type:, element_id:, application_id: nil, id: nil)
+            super(
+              speckle_type: SPECKLE_TYPE,
+              total_children_count: 0,
+              application_id: application_id,
+              id: id
+            )
+            self[:category] = category
+            self[:family] = family
+            self[:type] = type
+            self[:elementId] = element_id
+          end
+          # rubocop:enable Metrics/ParameterLists
+
+          def self.to_native(revit_element_type)
+            RevitElementType.new(
+              category: revit_element_type['category'],
+              family: revit_element_type['family'],
+              type: revit_element_type['type'],
+              element_id: revit_element_type['elementId'],
+              application_id: revit_element_type['applicationId'],
+              id: revit_element_type['id']
+            )
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/revit/revit_floor.rb

@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+require_relative '../../base'
+require_relative '../../built_elements/revit/parameter'
+require_relative '../../other/render_material'
+require_relative '../../geometry/line'
+require_relative '../../geometry/polyline'
+require_relative '../../../constants/type_constants'
+require_relative '../../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # Revit floor object.
+      class RevitFloor < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_FLOOR
+
+        # rubocop:disable Metrics/ParameterLists
+        def initialize(family:, type:, outline:, voids:, level:, units:, material:, parameters:nil, application_id: nil)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: nil
+          )
+          self[:family] = family
+          self[:type] = type
+          self[:level] = level
+          self[:outline] = outline
+          self[:voids] = voids
+          self[:units] = units
+          self[:parameters] = parameters
+          self[:renderMaterial] = material
+        end
+        # rubocop:enable Metrics/ParameterLists
+
+        # @param face [Sketchup::Face] face to get speckle schema for floor.
+        def self.to_speckle_schema(speckle_state, face, units, global_transformation: nil)
+          outline = Geometry::Polyline.from_loop(face.loops.first, units, global_transformation: global_transformation)
+          voids = []
+          if face.loops.length > 1
+            voids = face.loops[1..face.loops.length - 1].collect do |loop|
+              Geometry::Polyline.from_loop(loop, units, global_transformation: global_transformation)
+            end
+          end
+          material = face.material || face.back_material
+          schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.speckle_schema_to_speckle(face).to_h
+          source_exist = !speckle_state.speckle_mapper_state.mapper_source.nil?
+          level = nil
+          parameters = nil
+          if source_exist
+            level = speckle_state.speckle_mapper_state.mapper_source.levels.find { |l| l[:name] == schema['level'] }
+            parameters = Base.new
+            offset_parameter = BuiltElements::Revit::Parameter.new(name: 'Height Offset From Level')
+            level_z = Geometry.length_to_native(level[:elevation], level[:units])
+            min_z = face.vertices.collect(&:position).map(&:z).min
+            offset_parameter['value'] = Geometry.length_to_speckle(min_z - level_z, units)
+            offset_parameter['units'] = units
+            parameters['Height Offset From Level'] = offset_parameter
+          end
+
+          RevitFloor.new(
+            family: schema['family'],
+            type: schema['family_type'],
+            outline: outline,
+            voids: voids,
+            level: level,
+            units: units,
+            parameters: parameters,
+            material: material.nil? ? nil : Other::RenderMaterial.from_material(face.material || face.back_material),
+            application_id: face.persistent_id
+          )
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/revit/revit_wall.rb

@@ -0,0 +1,102 @@
+# frozen_string_literal: true
+
+require_relative '../../base'
+require_relative '../../built_elements/revit/parameter'
+require_relative '../../other/render_material'
+require_relative '../../geometry/line'
+require_relative '../../geometry/length'
+require_relative '../../../constants/type_constants'
+require_relative '../../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+require_relative '../../../sketchup_model/utils/face_utils'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # Revit wall object.
+      class RevitWall < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_REVIT_WALL
+
+        # rubocop:disable Metrics/ParameterLists
+        def initialize(family:, type:, base_line:, height:, flipped:, level:, units:, material:, parameters: nil, application_id: nil)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: nil
+          )
+          self[:family] = family
+          self[:type] = type
+          self[:height] = height
+          self[:flipped] = flipped
+          self[:level] = level
+          self[:baseLine] = base_line
+          self[:units] = units
+          self[:parameters] = parameters
+          self[:renderMaterial] = material
+        end
+        # rubocop:enable Metrics/ParameterLists
+
+        def self.to_native(state, wall, layer, entities, &convert_to_native)
+          obj = Other::DisplayValue.collect_definition_geometries(wall)
+          obj['name'] = Other::DisplayValue.get_definition_name(obj)
+
+          state, _definitions = Other::BlockDefinition.to_native(
+            state, obj, layer, entities, &convert_to_native
+          )
+
+          definition = state.sketchup_state.sketchup_model.definitions[Other::BlockDefinition.get_definition_name(obj)]
+
+          Other::BlockInstance.find_and_erase_existing_instance(definition, obj['id'], obj['applicationId'])
+          t_arr = obj['transform']
+          transform = t_arr.nil? ? Geom::Transformation.new : Other::Transform.to_native(t_arr, obj['units'])
+          instance = entities.add_instance(definition, transform)
+          instance.name = Other::DisplayValue.get_instance_name(obj['name']) unless obj['name'].nil?
+          instance.layer = layer unless layer.nil?
+          # Align instance axes that created from display value. (without any transform)
+          # BlockInstance.align_instance_axes(instance)
+          return state, [instance, definition]
+        end
+
+        # @param face [Sketchup::Face] face to get speckle schema for wall.
+        def self.to_speckle_schema(speckle_state, face, units, global_transformation: nil)
+          base_line = Geometry::Line.base_line_from_face(face, units, global_transformation: global_transformation)
+
+          material = face.material || face.back_material
+          schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.speckle_schema_to_speckle(face).to_h
+          source_exist = !speckle_state.speckle_mapper_state.mapper_source.nil?
+          level = nil
+          parameters = nil
+          if source_exist
+            level = speckle_state.speckle_mapper_state.mapper_source.levels.find { |l| l[:name] == schema['level'] }
+            parameters = Base.new
+            offset_parameter = BuiltElements::Revit::Parameter.new(name: 'Height Offset From Level')
+            level_z = Geometry.length_to_native(level[:elevation], level[:units])
+            min_z = face.vertices.collect(&:position).map(&:z).min
+            offset_parameter['value'] = Geometry.length_to_speckle(min_z - level_z, units)
+            offset_parameter['units'] = units
+            parameters['Height Offset From Level'] = offset_parameter
+          end
+
+          RevitWall.new(
+            family: schema['family'],
+            type: schema['family_type'],
+            base_line: base_line,
+            height: Geometry.length_to_speckle(SketchupModel::Utils::FaceUtils.max_z(face), units),
+            flipped: false,
+            level: level,
+            units: units,
+            parameters: parameters,
+            material: material.nil? ? nil : Other::RenderMaterial.from_material(face.material || face.back_material),
+            application_id: face.persistent_id
+          )
+        end
+
+        def self.get_wall_height(face, units)
+          points = face.vertices.collect(&:position)
+          points_z_values = points.collect(&:z)
+          Geometry.length_to_speckle(points_z_values.max - points_z_values.min, units)
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/built_elements/view3d.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 require_relative '../base'
+require_relative '../../constants/type_constants'
+require_relative '../../speckle_objects/geometry/length'
 require_relative '../../speckle_objects/geometry/point'
 require_relative '../../speckle_objects/geometry/vector'
 
@@ -9,7 +11,7 @@ module SpeckleConnector
     module BuiltElements
       # View3d object represents scenes on Sketchup.
       class View3d < Base
-        SPECKLE_TYPE = 'Objects.BuiltElements.View:Objects.BuiltElements.View3D'
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_VIEW3D
 
         # @param name [String] name of the scene
         # @param origin [SpeckleObjects::Geometry::Point] origin (eye) of the view.
@@ -17,7 +19,7 @@ module SpeckleConnector
         # @param direction [SpeckleObjects::Geometry::Vector] direction of the view from eye to target.
         # @param up_direction [SpeckleObjects::Geometry::Vector] up direction of the view.
         # @param is_perspective [Boolean] whether view is perspective or not.
-        # @param lens [Boolean] fov value of the view camera.
+        # @param lens [Numeric] focal length value of the view camera.
         # @param units [String] units of the camera.
         # @param application_id [String] application_id of the view.
         # @param update_properties [Hash{Symbol=>boolean}] properties of the view.
@@ -43,6 +45,125 @@ module SpeckleConnector
           self[:rendering_options] = rendering_options
         end
         # rubocop:enable Metrics/ParameterLists
+
+        # Collects scenes as views from sketchup model.
+        # @param sketchup_model [Sketchup::Model] sketchup model to collect views from pages.
+        # @param units [String] units of the model.
+        def self.from_model(sketchup_model, units)
+          sketchup_model.pages.collect { |page| from_page(page, units) }
+        end
+
+        # @param page [Sketchup::Page] page to convert speckle view.
+        def self.from_page(page, units)
+          cam = page.camera
+          origin = get_camera_origin(cam, units)
+          target = get_camera_target(cam, units)
+          direction = get_camera_direction(cam, units)
+          update_properties = get_scene_update_properties(page)
+          rendering_options = SpeckleObjects::Other::RenderingOptions.to_speckle(page.rendering_options)
+          View3d.new(
+            page.name, origin, target, direction, SpeckleObjects::Geometry::Vector.new(0, 0, 1, units),
+            cam.perspective?, cam.perspective? ? cam.focal_length : 35, units, page.name,
+            update_properties, rendering_options
+          )
+        end
+
+        # @param state [States::State] state of the speckle app.
+        # @param obj [Hash] commit object.
+        def self.to_native(state, view, _layer, _entities, &_convert_to_native)
+          sketchup_model = state.sketchup_state.sketchup_model
+          return state, [] unless view['speckle_type'] == 'Objects.BuiltElements.View:Objects.BuiltElements.View3D'
+
+          name = view['name'] || view['id']
+          return state, [] if sketchup_model.pages.any? { |page| page.name == name }
+
+          camera = create_camera(view)
+          sketchup_model.active_view.camera = camera
+          sketchup_model.pages.add(name)
+          page = sketchup_model.pages[name]
+          set_page_update_properties(page, view['update_properties']) if view['update_properties']
+          set_rendering_options(page.rendering_options, view['rendering_options']) if view['rendering_options']
+          return state, [page]
+        end
+
+        def self.create_camera(view)
+          origin = view['origin']
+          target = view['target']
+          focal_length = view['lens'] || 35
+          origin = SpeckleObjects::Geometry::Point.to_native(origin['x'], origin['y'], origin['z'], origin['units'])
+          target = SpeckleObjects::Geometry::Point.to_native(target['x'], target['y'], target['z'], target['units'])
+          view_direction = (origin - target).normalize
+          up = view_direction.parallel?([0, 0, 1]) ? [0, 1, 0] : [0, 0, 1]
+          # Set camera position before creating scene on it.
+          is_perspective = !view['isOrthogonal']
+          camera = Sketchup::Camera.new(origin, target, up, is_perspective)
+          camera.focal_length = focal_length if is_perspective
+          camera.height = (origin - target).length * 2 unless is_perspective
+          camera
+        end
+
+        # @param page [Sketchup::Page] scene to update -update properties-
+        def self.set_page_update_properties(page, update_properties)
+          update_properties.each do |prop, value|
+            page.instance_variable_set(:"@#{prop}", value)
+          end
+        end
+
+        # @param rendering_options [Sketchup::RenderingOptions] rendering options of scene (page)
+        def self.set_rendering_options(rendering_options, speckle_rendering_options)
+          speckle_rendering_options.each do |prop, value|
+            next if rendering_options[prop].nil?
+
+            rendering_options[prop] = if value.is_a?(Hash)
+                                        SpeckleObjects::Other::Color.to_native(value)
+                                      else
+                                        value
+                                      end
+          end
+        end
+
+        # Get scene properties
+        # @param page [Sketchup::Page] page on sketchup.
+        def self.get_scene_update_properties(page)
+          {
+            use_axes: page.use_axes?,
+            use_camera: page.use_camera?,
+            use_hidden_geometry: page.use_hidden_geometry?,
+            use_hidden_layers: page.use_hidden_layers?,
+            use_hidden_objects: page.use_hidden_objects?,
+            use_rendering_options: page.use_rendering_options?,
+            use_section_planes: page.use_section_planes?,
+            use_shadow_info: page.use_shadow_info?,
+            use_style: page.use_style?
+          }
+        end
+
+        def self.get_camera_direction(camera, units)
+          SpeckleObjects::Geometry::Vector.new(
+            SpeckleObjects::Geometry.length_to_speckle(camera.direction[0], units),
+            SpeckleObjects::Geometry.length_to_speckle(camera.direction[1], units),
+            SpeckleObjects::Geometry.length_to_speckle(camera.direction[2], units),
+            units
+          )
+        end
+
+        def self.get_camera_target(camera, units)
+          SpeckleObjects::Geometry::Point.new(
+            SpeckleObjects::Geometry.length_to_speckle(camera.target[0], units),
+            SpeckleObjects::Geometry.length_to_speckle(camera.target[1], units),
+            SpeckleObjects::Geometry.length_to_speckle(camera.target[2], units),
+            units
+          )
+        end
+
+        def self.get_camera_origin(camera, units)
+          SpeckleObjects::Geometry::Point.new(
+            SpeckleObjects::Geometry.length_to_speckle(camera.eye[0], units),
+            SpeckleObjects::Geometry.length_to_speckle(camera.eye[1], units),
+            SpeckleObjects::Geometry.length_to_speckle(camera.eye[2], units),
+            units
+          )
+        end
       end
     end
   end

speckle_connector/src/speckle_objects/geometry/arc.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Geometry
+      # Arc object definition for Speckle.
+      class Arc < Base
+        SPECKLE_TYPE = OBJECTS_GEOMETRY_ARC
+
+        # @param [States::State] state of the current application.
+        # @param arc [Object] object represents Speckle Arc.
+        # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
+        # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
+        def self.to_native(state, arc, layer, entities, &_convert_to_native)
+          plane = arc['plane']
+          units = arc['units']
+          origin = Point.to_native(plane['origin']['x'], plane['origin']['y'], plane['origin']['z'], units)
+          normal = Vector.to_native(plane['normal']['x'], plane['normal']['y'], plane['normal']['z'], units)
+          x_axis = Vector.to_native(plane['xdir']['x'], plane['xdir']['y'], plane['xdir']['z'], units)
+          radius = Geometry.length_to_native(arc['radius'], units)
+          edges = entities.add_arc(origin, x_axis, normal, radius, arc['startAngle'], arc['endAngle'])
+          edges.each { |edge| edge.layer = layer }
+          return state, edges
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/geometry/circle.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative 'point'
+require_relative 'vector'
+require_relative 'length'
+require_relative '../base'
+require_relative '../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Geometry
+      # Circle object definition for Speckle.
+      class Circle < Base
+        SPECKLE_TYPE = OBJECTS_GEOMETRY_CIRCLE
+
+        # @param [States::State] state of the current application.
+        # @param circle [Object] object represents Speckle Circle.
+        # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
+        # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
+        def self.to_native(state, circle, layer, entities, &_convert_to_native)
+          plane = circle['plane']
+          units = circle['units']
+          origin = Point.to_native(plane['origin']['x'], plane['origin']['y'], plane['origin']['z'], units)
+          normal = Vector.to_native(plane['normal']['x'], plane['normal']['y'], plane['normal']['z'], units)
+          radius = Geometry.length_to_native(circle['radius'], units)
+          edges = entities.add_circle(origin, normal, radius)
+          edges.each { |edge| edge.layer = layer }
+          return state, edges
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/geometry/length.rb

@@ -11,6 +11,10 @@ module SpeckleConnector
       end
 
       def self.length_to_native(length, units)
+        if units == 'none'
+          units = SpeckleConnector::Converters::
+              SKETCHUP_UNITS[Sketchup.active_model.options['UnitsOptions']['LengthUnit']]
+        end
         length.__send__(SpeckleConnector::Converters::SKETCHUP_UNIT_STRINGS[units])
       end
     end

speckle_connector/src/speckle_objects/geometry/line.rb

@@ -5,7 +5,8 @@ require_relative 'point'
 require_relative 'bounding_box'
 require_relative '../base'
 require_relative '../primitive/interval'
-require_relative '../../sketchup_model/dictionary/dictionary_handler'
+require_relative '../../sketchup_model/dictionary/base_dictionary_handler'
+require_relative '../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -17,11 +18,11 @@ module SpeckleConnector
         # @param start_pt [Geometry::Point] start point speckle object of the speckle line.
         # @param end_pt [Geometry::Point] end point speckle object of the speckle line.
         # @param domain [Primitive::Interval] interval speckle object of the speckle line -represents domain.
-        # @param bbox [Geometry::BoundingBox] bounding box speckle object of the speckle line.
         # @param units [String] units of the speckle line.
         # @param application_id [String, nil] entity id of the {Sketchup::Edge} that represents to the speckle line.
         # rubocop:disable Metrics/ParameterLists
-        def initialize(start_pt:, end_pt:, domain:, bbox:, units:, sketchup_attributes: {}, application_id: nil)
+        def initialize(start_pt:, end_pt:, domain:, units:, layer:,
+                       sketchup_attributes: {}, speckle_schema: {}, application_id: nil)
           super(
               speckle_type: 'Objects.Geometry.Line',
               total_children_count: 0,
@@ -31,39 +32,77 @@ module SpeckleConnector
           self[:start] = start_pt
           self[:end] = end_pt
           self[:domain] = domain
-          self[:bbox] = bbox
           self[:units] = units
+          self[:layer] = layer unless layer.nil?
+          self[:SpeckleSchema] = speckle_schema if speckle_schema.any?
           self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
         end
         # rubocop:enable Metrics/ParameterLists
 
         # @param edge [Sketchup::Edge] edge to convert line.
-        def self.from_edge(edge, units, model_preferences)
-          dictionaries = {}
-          if model_preferences[:include_entity_attributes] && model_preferences[:include_edge_entity_attributes]
-            dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(edge)
-          end
+        def self.from_edge(edge, units, model_preferences, global_transformation: nil)
+          dictionaries = SketchupModel::Dictionary::BaseDictionaryHandler
+                         .attribute_dictionaries_to_speckle(edge, model_preferences)
           att = dictionaries.any? ? { dictionaries: dictionaries } : {}
+          speckle_schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.speckle_schema_to_speckle(edge)
           start_pt = Geometry::Point.from_vertex(edge.start.position, units)
           end_pt = Geometry::Point.from_vertex(edge.end.position, units)
           domain = Primitive::Interval.from_numeric(0, Float(edge.length), units)
-          bbox = Geometry::BoundingBox.from_bounds(edge.bounds, units)
           Line.new(
             start_pt: start_pt,
             end_pt: end_pt,
             domain: domain,
-            bbox: bbox,
             units: units,
+            layer: SketchupModel::Query::Layer.entity_path(edge),
             sketchup_attributes: att,
+            speckle_schema: speckle_schema,
             application_id: edge.persistent_id.to_s
           )
         end
 
+        # @param edge [Sketchup::Face] face to get base line from face.
+        def self.base_line_from_face(face, units, global_transformation: nil)
+          points = face.vertices.collect(&:position)
+          points_z_values = points.collect(&:z)
+          height = Geometry.length_to_speckle(points_z_values.max - points_z_values.min, units)
+          min_z = points_z_values.min
+          projected_points = points.map { |p| Geom::Point3d.new(p.x, p.y, min_z) }
+          distance_with_points = Struct.new(:distance, :point_1, :point_2)
+          lines_with_distances = []
+          projected_points.each do |p|
+            projected_points.each do |p_other|
+              next if p_other == p
+
+              lines_with_distances.append(distance_with_points.new(p.distance(p_other), p, p_other))
+            end
+          end
+          lines_with_distances.sort_by!(&:distance).reverse!
+          p_1 = lines_with_distances.first.point_1
+          p_2 = lines_with_distances.first.point_2
+          unless global_transformation.nil?
+            p_1 = p_1.transform!(global_transformation)
+            p_2 = p_2.transform!(global_transformation)
+          end
+          Line.new(
+            start_pt: Geometry::Point.from_vertex(p_1, units),
+            end_pt: Geometry::Point.from_vertex(p_2, units),
+            domain: Primitive::Interval.from_numeric(0, Geometry.length_to_speckle(p_1.distance(p_2), units), units),
+            units: units,
+            layer: SketchupModel::Query::Layer.entity_path(face),
+            sketchup_attributes: {},
+            speckle_schema: {},
+            application_id: face.persistent_id.to_s
+          )
+        end
+
+        # @param state [States::State] state of the application.
         # @param line [Object] object represents Speckle line.
         # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
         # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
         # rubocop:disable Metrics/AbcSize
-        def self.to_native(line, layer, entities)
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/CyclomaticComplexity
+        def self.to_native(state, line, layer, entities, &_convert_to_native)
           if line.key?('value')
             values = line['value']
             points = values.each_slice(3).to_a.map { |pt| Point.to_native(pt[0], pt[1], pt[2], line['units']) }
@@ -74,24 +113,28 @@ module SpeckleConnector
             end_pt = Point.to_native(line['end']['x'], line['end']['y'], line['end']['z'], line['units'])
             edges = entities.add_edges(start_pt, end_pt)
           end
+          line_layer_name = SketchupModel::Query::Layer.entity_layer_from_path(line['layer'])
+          line_layer = state.sketchup_state.sketchup_model.layers.to_a.find { |l| l.display_name == line_layer_name }
           edges.each do |edge|
-            edge.layer = layer
+            edge.layer = line_layer.nil? ? layer : line_layer
             unless line['sketchup_attributes'].nil?
-              SketchupModel::Dictionary::DictionaryHandler
+              SketchupModel::Dictionary::BaseDictionaryHandler
                 .attribute_dictionaries_to_native(edge, line['sketchup_attributes']['dictionaries'])
             end
           end
+          return state, edges
         end
         # rubocop:enable Metrics/AbcSize
+        # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/CyclomaticComplexity
 
         def self.test_line(start_point, end_point, units)
           domain = Primitive::Interval.from_numeric(0, 5, units)
-          bbox = Geometry::BoundingBox.test_bounds(units)
           Line.new(
             start_pt: start_point,
             end_pt: end_point,
             domain: domain,
-            bbox: bbox,
+            layer: 'test',
             application_id: '',
             units: units
           )

speckle_connector/src/speckle_objects/geometry/mesh.rb

@@ -3,8 +3,14 @@
 require_relative '../base'
 require_relative '../geometry/bounding_box'
 require_relative '../other/render_material'
+require_relative '../../mapper/mapper'
+require_relative '../../sketchup_model/query/entity'
 require_relative '../../convertors/clean_up'
+require_relative '../../sketchup_model/dictionary/base_dictionary_handler'
+require_relative '../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
 require_relative '../../sketchup_model/dictionary/dictionary_handler'
+require_relative '../../sketchup_model/utils/plane_utils'
+require_relative '../../sketchup_model/query/layer'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -29,7 +35,8 @@ module SpeckleConnector
         # @param faces [Array] faces of the speckle mesh.
         # @param sketchup_attributes [Hash] additional information about speckle mesh.
         # rubocop:disable Metrics/ParameterLists
-        def initialize(units:, render_material:, vertices:, faces:, sketchup_attributes:, application_id: nil)
+        def initialize(units:, render_material:, vertices:, faces:,
+                       sketchup_attributes:, layer:, speckle_schema: {}, application_id: nil)
           super(
             speckle_type: SPECKLE_TYPE,
             total_children_count: 0,
@@ -40,84 +47,141 @@ module SpeckleConnector
           @polygons = []
           @units = units
           self[:units] = units
+          self[:layer] = layer
           self[:renderMaterial] = render_material
-          # self[:bbox] = bbox
           self[:'@(31250)vertices'] = vertices
           self[:'@(62500)faces'] = faces
           self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
+          self['@SpeckleSchema'] = speckle_schema if speckle_schema.any?
         end
         # rubocop:enable Metrics/ParameterLists
 
+        # Checks 4 points are planar or not.
+        def self.check_4_points_planar(points)
+          plane = SketchupModel::Utils::Plane.from_points(points[0], points[1], points[2])
+          plane.on_plane?(points[3])
+        end
+
+        # Add quad mesh to sketchup native mesh by checking planarity.
+        # @param native_mesh [Geom::Mesh] sketchup mesh to convert them later faces.
+        # @param polygon_points [Array<Geom::Point3d>] sketchup points to add them with polygon to mesh.
+        def self.add_quad_mesh(native_mesh, polygon_points)
+          is_planar = check_4_points_planar(polygon_points)
+          if is_planar
+            native_mesh.add_polygon(polygon_points)
+          else
+            native_mesh.add_polygon([polygon_points[0], polygon_points[1], polygon_points[2]])
+            native_mesh.add_polygon([polygon_points[0], polygon_points[2], polygon_points[3]])
+          end
+          is_planar
+        end
+
         # @param entities [Sketchup::Entities] entities to add
         # rubocop:disable Metrics/MethodLength
         # rubocop:disable Metrics/AbcSize
         # rubocop:disable Metrics/CyclomaticComplexity
-        def self.to_native(sketchup_model, mesh, layer, entities, model_preferences)
+        # rubocop:disable Metrics/PerceivedComplexity:
+        def self.to_native(state, mesh, layer, entities, &convert_to_native)
+          model_preferences = state.user_state.preferences[:model]
           # Get soft? flag of {Sketchup::Edge} object to understand smoothness of edge.
-          is_soften = get_soften_setting(mesh)
+          is_soften = get_soften_setting(mesh, entities)
           smooth_flags = is_soften ? 4 : 1
           # Get native points to add polygon into native mesh.
           points = get_native_points(mesh)
           # Initialize native PolygonMesh object later to add polygon inside it.
           native_mesh = Geom::PolygonMesh.new(mesh['vertices'].count / 3)
           faces = mesh['faces']
+          has_any_non_planar_quad_mesh = false
           while faces.count > 0
             num_pts = faces.shift
             # 0 -> 3, 1 -> 4 to preserve backwards compatibility
             num_pts += 3 if num_pts < 3
             indices = faces.shift(num_pts)
-            native_mesh.add_polygon(indices.map { |index| points[index] })
+            polygon_points = indices.map { |index| points[index] }
+            # Quad mesh
+            if num_pts == 4
+              is_planar = add_quad_mesh(native_mesh, polygon_points)
+              has_any_non_planar_quad_mesh = true unless is_planar
+            else
+              native_mesh.add_polygon(polygon_points)
+            end
           end
-          material = Other::RenderMaterial.to_native(sketchup_model, mesh['renderMaterial'])
-          entities.add_faces_from_mesh(native_mesh, smooth_flags, material)
+          state, _materials = Other::RenderMaterial.to_native(state, mesh['renderMaterial'], layer,
+                                                              entities, &convert_to_native)
+          # Find and assign material if exist
+          unless mesh['renderMaterial'].nil?
+            material_name = mesh['renderMaterial']['name'] || mesh['renderMaterial']['id']
+            # Retrieve material from state
+            material = state.sketchup_state.materials.by_id(material_name)
+          end
+
+          # Add faces from mesh with material and smooth setting
+          entities.add_faces_from_mesh(native_mesh, smooth_flags, material, material)
           added_faces = entities.grep(Sketchup::Face).last(native_mesh.polygons.length)
+          mesh_layer_name = SketchupModel::Query::Layer.entity_layer_from_path(mesh['layer'])
+          mesh_layer = state.sketchup_state.sketchup_model.layers.to_a.find { |l| l.display_name == mesh_layer_name }
+          # Merge only added faces in this scope
+          # if model_preferences[:merge_coplanar_faces]
+          #   added_faces = Converters::CleanUp.merge_coplanar_faces(added_faces)
+          # end
           added_faces.each do |face|
-            face.layer = layer
+            face.layer = mesh_layer unless mesh_layer.nil?
+            # Smooth edges if they already soft
+            # FIXME: Below line should be reconsidered. It might be a good to know here mesh comes from NURBS or not.
+            face.edges.each { |edge| edge.smooth = true if edge.soft? } if has_any_non_planar_quad_mesh
             unless mesh['sketchup_attributes'].nil?
-              SketchupModel::Dictionary::DictionaryHandler
+              SketchupModel::Dictionary::BaseDictionaryHandler
                 .attribute_dictionaries_to_native(face, mesh['sketchup_attributes']['dictionaries'])
             end
           end
-          # Merge only added faces in this scope
-          Converters::CleanUp.merge_coplanar_faces(added_faces) if model_preferences[:merge_coplanar_faces]
-          native_mesh
+
+          return state, added_faces
         end
         # rubocop:enable Metrics/MethodLength
         # rubocop:enable Metrics/AbcSize
         # rubocop:enable Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/PerceivedComplexity:
 
         # @param face [Sketchup::Face] face to convert mesh
+        # @param units [String] model units to send Speckle.
+        # @param model_preferences [Hash{Symbol=>Boolean}] model preferences to check include attributes or not.
+        # @param global_transform [Geom::Transformation, nil] global transformation value of face if it is not included
+        #  into any component.
         # rubocop:disable Style/MultilineTernaryOperator
-        # rubocop:disable Metrics/CyclomaticComplexity
-        def self.from_face(face, units, model_preferences)
-          dictionaries = {}
-          if model_preferences[:include_entity_attributes] && model_preferences[:include_face_entity_attributes]
-            dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(face)
-          end
+        def self.from_face(speckle_state:, face:, units:, model_preferences:, global_transform: nil, parent_material: nil)
+          dictionaries = SketchupModel::Dictionary::BaseDictionaryHandler
+                         .attribute_dictionaries_to_speckle(face, model_preferences)
           has_any_soften_edge = face.edges.any?(&:soft?)
           att = dictionaries.any? ? { is_soften: has_any_soften_edge, dictionaries: dictionaries }
                   : { is_soften: has_any_soften_edge }
+          speckle_schema = Mapper.to_speckle(speckle_state, face, units, model_preferences, global_transformation: global_transform)
+          material = face.material || face.back_material || parent_material
           speckle_mesh = Mesh.new(
             units: units,
-            render_material: face.material.nil? && face.back_material.nil? ? nil : Other::RenderMaterial
-                                                          .from_material(face.material || face.back_material),
-            # bbox: Geometry::BoundingBox.from_bounds(face.bounds, units),
-            vertices: [],
-            faces: [],
-            sketchup_attributes: att,
+            render_material: material.nil? ? nil : Other::RenderMaterial.from_material(material),
+            vertices: [], faces: [], sketchup_attributes: att,
+            layer: SketchupModel::Query::Layer.entity_path(face),
+            speckle_schema: speckle_schema,
             application_id: face.persistent_id
           )
-          speckle_mesh.face_to_mesh(face)
+          speckle_mesh.face_to_mesh(face, global_transform)
           speckle_mesh.update_mesh
           speckle_mesh
         end
         # rubocop:enable Style/MultilineTernaryOperator
-        # rubocop:enable Metrics/CyclomaticComplexity
 
-        def face_to_mesh(face)
+        # @param global_transform [Geom::Transformation, nil] global transformation value of face if it is not included
+        #  into any component. So it's mesh will be transformed into global coordinates to represent it correctly in
+        #  Speckle viewer or other connectors.
+        def face_to_mesh(face, global_transform = nil)
           mesh = face.loops.count > 1 ? face.mesh : nil
-          mesh.nil? ? face_vertices_to_array(face) : mesh_points_to_array(mesh)
-          mesh.nil? ? face_indices_to_array(face) : mesh_faces_to_array(mesh)
+          if global_transform.nil?
+            mesh.nil? ? face_vertices_to_array(face) : mesh_points_to_array(mesh)
+            mesh.nil? ? face_indices_to_array(face) : mesh_faces_to_array(mesh)
+          else
+            mesh_points_to_array(face.mesh, global_transform)
+            mesh_faces_to_array(face.mesh, global_transform)
+          end
         end
 
         # Collects indexed Sketchup vertices into flat array for Speckle use.
@@ -162,7 +226,8 @@ module SpeckleConnector
 
         # Get a flat array of vertices from a sketchup polygon mesh
         # @param mesh [Geom::PolygonMesh] mesh to get points.
-        def mesh_points_to_array(mesh)
+        def mesh_points_to_array(mesh, global_transform = nil)
+          mesh.transform!(global_transform) unless global_transform.nil?
           mesh.points.each do |pt|
             # FIXME: Enable previous line when viewer supports shared vertices
             # vertices.push(pt) unless vertices.any? { |point| point == pt }
@@ -172,7 +237,8 @@ module SpeckleConnector
 
         # Get an array of face indices from a sketchup polygon mesh
         # @param mesh [Geom::PolygonMesh] mesh to convert into polygons.
-        def mesh_faces_to_array(mesh)
+        def mesh_faces_to_array(mesh, global_transform = nil)
+          mesh.transform!(global_transform) unless global_transform.nil?
           mesh.polygons.each do |poly|
             global_polygon_array = [poly.count]
             poly.each do |index|
@@ -185,12 +251,23 @@ module SpeckleConnector
           end
         end
 
-        def self.get_soften_setting(mesh)
-          if mesh['sketchup_attributes'].nil?
-            true
-          else
-            mesh['sketchup_attributes']['is_soften'].nil? ? true : mesh['sketchup_attributes']['is_soften']
+        DEFINITIONS_WILL_BE_HARD_EDGE = %w[
+          Walls
+          Floors
+          Stairs
+          Structural Foundations
+          Doors
+          Windows
+        ].freeze
+
+        # @param mesh [Object] speckle mesh object
+        # @param entities [Sketchup::Entities] sketchup entities that mesh will be created in it as face.
+        def self.get_soften_setting(mesh, entities)
+          unless mesh['sketchup_attributes'].nil?
+            return mesh['sketchup_attributes']['is_soften'].nil? ? true : mesh['sketchup_attributes']['is_soften']
           end
+
+          return DEFINITIONS_WILL_BE_HARD_EDGE.none? { |def_name| entities.parent.name.include?(def_name) }
         end
 
         def self.get_native_points(mesh)
@@ -200,6 +277,39 @@ module SpeckleConnector
           end
           points
         end
+
+        # Mesh group id helps to determine how to group faces into meshes.
+        # @param face [Sketchup::Face] face to get mesh group id.
+        def self.get_mesh_group_id(face, model_preferences, parent_material = nil)
+          if model_preferences[:include_entity_attributes] &&
+             model_preferences[:include_face_entity_attributes] &&
+             attribute_dictionary?(face)
+            return face.persistent_id.to_s
+          end
+
+          material = face.material || face.back_material || parent_material
+          layer_name = face.layer.display_name
+          return layer_name if material.nil?
+
+          return material.entityID.to_s + layer_name
+        end
+
+        def self.attribute_dictionary?(face)
+          any_attribute_dictionary = !(face.attribute_dictionaries.nil? || face.attribute_dictionaries.first.nil?)
+          return any_attribute_dictionary unless any_attribute_dictionary
+
+          # If there are any attribute dictionary, then make sure that they are not ignored ones.
+          all_attribute_dictionary_ignored = face.attribute_dictionaries.all? do |dict|
+            ignored_dictionaries.include?(dict.name)
+          end
+          !all_attribute_dictionary_ignored
+        end
+
+        def self.ignored_dictionaries
+          [
+            'Speckle_Base_Object'
+          ]
+        end
       end
     end
   end

speckle_connector/src/speckle_objects/geometry/polycurve.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Geometry
+      # Polycurve object definition for Speckle.
+      # It basically groups the lines-curves under it's `segments` property.
+      class Polycurve < Base
+        SPECKLE_TYPE = OBJECTS_GEOMETRY_POLYCURVE
+
+        def self.to_native(state, polycurve, layer, entities, &convert_to_native)
+          polycurve['displayValue'] = polycurve['segments']
+          convert_to_native.call(state, polycurve, layer, entities)
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/geometry/polyline.rb

@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+require_relative 'length'
+require_relative 'point'
+require_relative 'bounding_box'
+require_relative '../base'
+require_relative '../primitive/interval'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Geometry
+      # Polyline object definition for Speckle.
+      class Polyline < Base
+        SPECKLE_TYPE = OBJECTS_GEOMETRY_POLYLINE
+
+        # @param value [Array<Numeric>] polygon vertex coordinates as flat list.
+        # @param domain [Primitive::Interval] domain of the polyline.
+        # @param length [Numeric] length of the polyline.
+        # @param closed [Boolean] whether polyline is closed or not.
+        # @param units [String] units of the polyline.
+        # @param application_id [String] application id of the polyline which corresponds to persistent_id of the Loop.
+        # rubocop:disable Metrics/ParameterLists
+        def initialize(value:, domain:, length:, closed:, units:, application_id: nil)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: nil
+          )
+          self[:value] = value
+          self[:domain] = domain
+          self[:length] = length
+          self[:closed] = closed
+          self[:units] = units
+        end
+        # rubocop:enable Metrics/ParameterLists
+
+        # @param loop [Sketchup::Loop] loop to convert closed speckle polyline.
+        def self.from_loop(loop, units, global_transformation: nil)
+          points = loop.vertices.collect do |vertex|
+            position = vertex.position
+            position = vertex.position.transform!(global_transformation) unless global_transformation.nil?
+            position
+          end
+          values = points.collect do |p|
+            [Geometry.length_to_speckle(p.x, units),
+             Geometry.length_to_speckle(p.y, units),
+             Geometry.length_to_speckle(p.z, units)]
+          end.flatten
+          loop_length = loop.edges.sum(&:length)
+          length = Geometry.length_to_speckle(loop_length, units)
+          domain = Primitive::Interval.from_lengths(0, loop_length, units)
+          Polyline.new(
+            value: values,
+            domain: domain,
+            length: length,
+            units: units,
+            closed: true,
+            application_id: loop.persistent_id.to_s
+          )
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/geometry/units.rb

@@ -0,0 +1,207 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Geometry
+      module Units
+        MILLIMETERS = 'mm'
+        CENTIMETERS = 'cm'
+        METERS = 'm'
+        KILOMETERS = 'km'
+        INCHES = 'in'
+        FEET = 'ft'
+        YARDS = 'yd'
+        MILES = 'mi'
+        NONE = 'none'
+
+        # USInches = "us_in" the smelliest ones, can add later if people scream "USA #1"
+        USFEET = 'us_ft' # it happened, absolutely gross
+
+        SUPPORTED_UNITS = [MILLIMETERS, CENTIMETERS, METERS, KILOMETERS,
+                           INCHES, FEET, USFEET, YARDS, MILES, NONE].freeze
+
+        CONVERSION_TABLE = {
+          MILLIMETERS => {
+            CENTIMETERS => 0.1,
+            METERS => 0.001,
+            KILOMETERS => 1e-6,
+            INCHES => 0.0393701,
+            FEET => 0.00328084,
+            USFEET => 0.0032808333,
+            YARDS => 0.00109361,
+            MILES => 6.21371e-7
+          },
+          CENTIMETERS => {
+            MILLIMETERS => 10,
+            METERS => 0.01,
+            KILOMETERS => 1e-5,
+            INCHES => 0.393701,
+            FEET => 0.0328084,
+            USFEET => 0.0328083333,
+            YARDS => 0.0109361,
+            MILES => 6.21371e-6
+          },
+          METERS => {
+            MILLIMETERS => 1000,
+            CENTIMETERS => 100,
+            KILOMETERS => 0.001,
+            INCHES => 39.3701,
+            FEET => 3.28084,
+            USFEET => 3.28083333,
+            YARDS => 1.09361,
+            MILES => 0.000621371
+          },
+          KILOMETERS => {
+            MILLIMETERS => 1e6,
+            CENTIMETERS => 100000,
+            METERS => 1000,
+            INCHES => 39370.1,
+            FEET => 3280.84,
+            USFEET => 3280.83333,
+            YARDS => 1093.61,
+            MILES => 0.621371
+          },
+          INCHES => {
+            MILLIMETERS => 25.4,
+            CENTIMETERS => 2.54,
+            METERS => 0.0254,
+            KILOMETERS => 2.54e-5,
+            FEET => 0.0833333,
+            USFEET => 0.0833331667,
+            YARDS => 0.027777694,
+            MILES => 1.57828e-5
+          },
+          FEET => {
+            MILLIMETERS => 304.8,
+            CENTIMETERS => 30.48,
+            METERS => 0.3048,
+            KILOMETERS => 0.0003048,
+            INCHES => 12,
+            USFEET => 0.999998,
+            YARDS => 0.333332328,
+            MILES => 0.000189394
+          },
+          USFEET => {
+            MILLIMETERS => 120000.0 / 3937.0,
+            CENTIMETERS => 12000.0 / 3937.0,
+            METERS => 1200.0 / 3937.0,
+            KILOMETERS => 1.2 / 3937.0,
+            INCHES => 12.000024,
+            FEET => 1.000002,
+            YARDS => 1.000002 / 3.0,
+            MILES => 1.000002 / 5280.0
+          },
+          YARDS => {
+            MILLIMETERS => 914.4,
+            CENTIMETERS => 91.44,
+            METERS => 0.9144,
+            KILOMETERS => 0.0009144,
+            INCHES => 36,
+            FEET => 3,
+            USFEET => 2.999994,
+            MILES => 1.0 / 1760.0
+          },
+          MILES => {
+            MILLIMETERS => 1.609e6,
+            CENTIMETERS => 160934,
+            METERS => 1609.34,
+            KILOMETERS => 1.60934,
+            INCHES => 63360,
+            FEET => 5280,
+            USFEET => 5279.98944002112,
+            YARDS => 1759.99469184
+          },
+          NONE => { NONE => 1 }
+        }.freeze
+
+        def self.unit_supported?(unit)
+          SUPPORTED_UNITS.include?(unit)
+        end
+
+        # USYards = "us_yd" the smelliest ones, can add later if people scream "USA #1"
+        # USMiles = "us_mi" the smelliest ones, can add later if people scream "USA #1"
+
+        def self.get_conversion_factor(from, to)
+          from = get_units_from_string(from)
+          to = get_units_from_string(to)
+          CONVERSION_TABLE[from][to] || 1
+        end
+
+        def self.get_units_from_string(unit)
+          return nil if unit.nil?
+
+          case unit.downcase
+          when 'mm', 'mil', 'millimeter', 'millimeters', 'millimetres'
+            MILLIMETERS
+          when 'cm', 'centimetre', 'centimeter', 'centimetres', 'centimeters'
+            CENTIMETERS
+          when 'm', 'meter', 'metre', 'meters', 'metres'
+            METERS
+          when 'inches', 'inch', 'in'
+            INCHES
+          when 'feet', 'foot', 'ft'
+            FEET
+          when 'ussurveyfeet'
+            USFEET
+          when 'yard', 'yards', 'yd'
+            YARDS
+          when 'miles', 'mile', 'mi'
+            MILES
+          when 'kilometers', 'kilometer', 'km'
+            KILOMETERS
+          when 'none'
+            NONE
+          else
+            raise "Cannot understand what unit #{unit} is."
+          end
+        end
+
+        def self.get_encoding_from_unit(unit)
+          case unit
+          when MILLIMETERS
+            1
+          when CENTIMETERS
+            2
+          when METERS
+            3
+          when KILOMETERS
+            4
+          when INCHES
+            5
+          when FEET
+            6
+          when YARDS
+            7
+          when MILES
+            8
+          else
+            0
+          end
+        end
+
+        def self.get_unit_from_encoding(unit)
+          case unit
+          when 1
+            MILLIMETERS
+          when 2
+            CENTIMETERS
+          when 3
+            METERS
+          when 4
+            KILOMETERS
+          when 5
+            INCHES
+          when 6
+            FEET
+          when 7
+            YARDS
+          when 8
+            MILES
+          else
+            NONE
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/geometry/vector.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require_relative 'length'
 require_relative '../base'
 
 module SpeckleConnector
@@ -25,6 +26,14 @@ module SpeckleConnector
           self[:z] = z
           self[:units] = units
         end
+
+        def self.to_native(x, y, z, units)
+          Geom::Vector3d.new(
+            Geometry.length_to_native(x, units),
+            Geometry.length_to_native(y, units),
+            Geometry.length_to_native(z, units)
+          )
+        end
       end
     end
   end

speckle_connector/src/speckle_objects/gis/line_element.rb

@@ -0,0 +1,68 @@
+# frozen_string_literal: true
+
+require_relative 'utils'
+require_relative '../base'
+require_relative '../other/transform'
+require_relative '../other/block_definition'
+require_relative '../other/block_instance'
+require_relative '../../constants/type_constants'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module GIS
+      # Line element in GIS tools.
+      class LineElement < Base
+        SPECKLE_TYPE = OBJECTS_GIS_LINEELEMENT
+
+        # Handles polygon element differently from display value.
+        def self.to_native(state, obj, layer, entities, &convert_to_native)
+          attributes = GIS.get_qgis_attributes(obj)
+          obj = collect_definition_geometries(obj)
+          obj['name'] = GIS.get_definition_name(obj, attributes)
+
+          state, _definitions = Other::BlockDefinition.to_native(
+            state, obj, layer, entities, &convert_to_native
+          )
+
+          definition = state.sketchup_state.sketchup_model
+                            .definitions[Other::BlockDefinition.get_definition_name(obj)]
+
+          Other::BlockInstance.find_and_erase_existing_instance(definition, obj['id'], obj['applicationId'])
+          t_arr = obj['transform']
+          transform = t_arr.nil? ? Geom::Transformation.new : Other::Transform.to_native(t_arr, obj['units'])
+          instance = entities.add_instance(definition, transform)
+          instance.name = obj['name'] unless obj['name'].nil?
+          SketchupModel::Dictionary::DictionaryHandler.set_hash(instance, attributes, 'qgis')
+          SketchupModel::Dictionary::DictionaryHandler.set_hash(definition, attributes, 'qgis')
+          # Align instance axes that created from display value. (without any transform)
+          Other::BlockInstance.align_instance_axes(instance)
+          return state, [instance, definition]
+        end
+
+        def self.collect_definition_geometries(obj)
+          geometries = []
+
+          # FIXME: This type check needed because of QGIS. It can send geometries both way, object or array..
+          #  This is something need to be fixed by QGIS.
+          if obj['geometry'].is_a?(Array)
+            obj['geometry'].each do |geometry|
+              geometries << geometry
+            end
+          else
+            geometries += obj['geometry']
+          end
+
+          geometries.each do |geo|
+            if geo['speckle_type'] && geo['speckle_type'] == OBJECTS_GEOMETRY_MESH
+              geo['sketchup_attributes'] = { 'is_soften' => false }
+            end
+          end
+
+          obj['geometry'] = geometries
+          obj
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/gis/polygon_element.rb

@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+require_relative 'utils'
+require_relative '../base'
+require_relative '../other/transform'
+require_relative '../other/block_definition'
+require_relative '../other/block_instance'
+require_relative '../../constants/type_constants'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module GIS
+      # BoundingBox object definition for Speckle.
+      class PolygonElement < Base
+        SPECKLE_TYPE = OBJECTS_GIS_POLYGONELEMENT
+
+        # Handles polygon element differently from display value.
+        def self.to_native(state, obj, layer, entities, &convert_to_native)
+          attributes = GIS.get_qgis_attributes(obj)
+          obj = collect_definition_geometries(obj)
+          obj['name'] = GIS.get_definition_name(obj, attributes)
+
+          state, _definitions = Other::BlockDefinition.to_native(
+            state, obj, layer, entities, &convert_to_native
+          )
+
+          definition = state.sketchup_state.sketchup_model
+                            .definitions[Other::BlockDefinition.get_definition_name(obj)]
+
+          Other::BlockInstance.find_and_erase_existing_instance(definition, obj['id'], obj['applicationId'])
+          t_arr = obj['transform']
+          transform = t_arr.nil? ? Geom::Transformation.new : Other::Transform.to_native(t_arr, obj['units'])
+          instance = entities.add_instance(definition, transform)
+          instance.name = obj['name'] unless obj['name'].nil?
+          SketchupModel::Dictionary::DictionaryHandler.set_hash(instance, attributes, 'qgis')
+          SketchupModel::Dictionary::DictionaryHandler.set_hash(definition, attributes, 'qgis')
+          # Align instance axes that created from display value. (without any transform)
+          Other::BlockInstance.align_instance_axes(instance)
+          return state, [instance, definition]
+        end
+
+        def self.collect_definition_geometries(obj)
+          geometries = []
+
+          # FIXME: This type check needed because of QGIS. It can send geometries both way, object or array..
+          #  This is something need to be fixed by QGIS.
+          if obj['geometry'].is_a?(Array)
+            obj['geometry'].each do |geometry|
+              display_value = geometry['displayValue']
+
+              geometries += display_value
+            end
+          else
+            geometries += obj['geometry']['displayValue']
+          end
+
+          geometries.each do |geo|
+            if geo['speckle_type'] && geo['speckle_type'] == OBJECTS_GEOMETRY_MESH
+              geo['sketchup_attributes'] = { 'is_soften' => false }
+            end
+          end
+
+          obj['geometry'] = geometries
+          obj
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/gis/utils.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../other/transform'
+require_relative '../other/block_definition'
+require_relative '../other/block_instance'
+require_relative '../../constants/type_constants'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module GIS
+      def self.get_definition_name(obj, attributes)
+        return obj['name'] unless obj['name'].nil?
+
+        return attributes['name'] unless attributes['name'].nil?
+
+        return "def::#{obj['id']}"
+      end
+
+      def self.get_qgis_attributes(obj)
+        attributes = obj['attributes'].to_h
+        speckle_properties = %w[id speckle_type totalChildrenCount units applicationId]
+        speckle_properties.each { |key| attributes.delete(key) }
+        attributes
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/block_definition.rb

@@ -7,7 +7,8 @@ require_relative '../base'
 require_relative '../geometry/point'
 require_relative '../geometry/mesh'
 require_relative '../geometry/bounding_box'
-require_relative '../../sketchup_model/dictionary/dictionary_handler'
+require_relative '../../sketchup_model/dictionary/base_dictionary_handler'
+require_relative '../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -22,7 +23,7 @@ module SpeckleConnector
         # @param application_id [String, NilClass] application id of the block definition.
         # rubocop:disable Metrics/ParameterLists
         def initialize(geometry:, name:, units:, always_face_camera:, sketchup_attributes: {},
-                       application_id: nil)
+                       speckle_schema: {}, application_id: nil)
           super(
             speckle_type: SPECKLE_TYPE,
             total_children_count: 0,
@@ -33,7 +34,8 @@ module SpeckleConnector
           self[:name] = name
           self[:always_face_camera] = always_face_camera
           self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
-          # FIXME: Since geometry sends with @ as detached, block basePlane renders on viewer.
+          self[:SpeckleSchema] = speckle_schema if speckle_schema.any?
+          # '@@' means that it is a detached property.
           self['@@geometry'] = geometry
         end
         # rubocop:enable Metrics/ParameterLists
@@ -42,32 +44,19 @@ module SpeckleConnector
         #  instance
         # @param units [String] units of the Sketchup model
         # @param definitions [Hash{String=>BlockDefinition}] all converted {BlockDefinition}s on the converter.
-        # rubocop:disable Metrics/CyclomaticComplexity
-        # rubocop:disable Metrics/PerceivedComplexity
         # rubocop:disable Metrics/MethodLength
-        # rubocop:disable Metrics/AbcSize
         # rubocop:disable Metrics/ParameterLists
-        def self.from_definition(definition, units, definitions, preferences, speckle_state, parent, &convert)
-          guid = definition.guid
-          return definitions[guid] if definitions.key?(guid)
-
-          dictionaries = {}
-          if preferences[:model][:include_entity_attributes]
-            if definition.group?
-              if preferences[:model][:include_group_entity_attributes]
-                dictionaries = SketchupModel::Dictionary::DictionaryHandler
-                               .attribute_dictionaries_to_speckle(definition)
-              end
-            elsif preferences[:model][:include_component_entity_attributes]
-              dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(definition)
-            end
-          end
+        def self.from_definition(definition, units, preferences, speckle_state, parent, &convert)
+          dictionaries = SketchupModel::Dictionary::BaseDictionaryHandler
+                         .attribute_dictionaries_to_speckle(definition, preferences[:model])
           att = dictionaries.any? ? { dictionaries: dictionaries } : {}
+          speckle_schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler
+                           .speckle_schema_to_speckle(definition)
 
           # TODO: Solve logic
           geometry = if definition.entities[0].is_a?(Sketchup::Edge) || definition.entities[0].is_a?(Sketchup::Face)
                        new_speckle_state, geo = group_entities_to_speckle(
-                         definition, preferences, speckle_state, parent, &convert
+                         definition.entities, preferences, speckle_state, parent, &convert
                        )
                        speckle_state = new_speckle_state
                        geo
@@ -83,74 +72,108 @@ module SpeckleConnector
                        end
                      end
 
-          # FIXME: Decide how to approach base point of the definition instead origin.
           block_definition = BlockDefinition.new(
             units: units,
             name: definition.name,
-            geometry: geometry,
+            geometry: geometry.compact,
             always_face_camera: definition.behavior.always_face_camera?,
             sketchup_attributes: att,
+            speckle_schema: speckle_schema,
             application_id: definition.persistent_id.to_s
           )
           return speckle_state, block_definition
         end
-        # rubocop:enable Metrics/CyclomaticComplexity
-        # rubocop:enable Metrics/PerceivedComplexity
         # rubocop:enable Metrics/MethodLength
-        # rubocop:enable Metrics/AbcSize
         # rubocop:enable Metrics/ParameterLists
 
+        def self.get_definition_name(def_obj)
+          return def_obj['name'] unless def_obj['name'].nil?
+
+          return "def::#{def_obj['applicationId']}"
+        end
+
         # Finds or creates a component definition from the geometry and the given name
-        # @param sketchup_model [Sketchup::Model] sketchup model to check block definitions.
+        # @param state [States::State] state of the application.
         # rubocop:disable Metrics/CyclomaticComplexity
         # rubocop:disable Metrics/PerceivedComplexity
-        # rubocop:disable Metrics/ParameterLists
-        def self.to_native(sketchup_model, geometry, layer, name, always_face_camera, model_preferences,
-                           sketchup_attributes, application_id = '', &convert)
-          definition = sketchup_model.definitions[name]
-          return definition if definition && (definition.name == name || definition.guid == application_id)
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/AbcSize
+        def self.to_native(state, definition_obj, layer, _entities, &convert_to_native)
+          sketchup_model = state.sketchup_state.sketchup_model
 
-          definition&.entities&.clear!
-          definition ||= sketchup_model.definitions.add(name)
-          definition.layer = layer
-          if geometry.is_a?(Array)
-            geometry.each { |obj| convert.call(obj, layer, model_preferences, definition.entities) }
+          # FIXME: Check later this is a valid check or not. Maybe unnecessary? If necessary document it!
+          # Check definitions from sketchup_model with name and application id
+          definition_name = get_definition_name(definition_obj)
+          application_id = definition_obj['applicationId']
+          definition = sketchup_model.definitions[definition_name]
+
+          # Check any entities of definition changed
+          entities_updated = entities_updated?(definition, definition_obj)
+
+          if definition && !entities_updated &&
+             (definition.name == definition_name || definition.guid == application_id)
+            return state, [definition]
           end
-          if geometry.is_a?(Hash) && !geometry['speckle_type'].nil?
-            convert.call(geometry, layer, model_preferences, definition.entities)
+
+          geometry = definition_obj['geometry'] || definition_obj['@geometry'] || definition_obj['displayValue']
+
+          always_face_camera = definition_obj['always_face_camera'].nil? ? false : definition_obj['always_face_camera']
+          sketchup_attributes = definition_obj['sketchup_attributes']
+          definition&.entities&.clear!
+          definition ||= sketchup_model.definitions.add(definition_name)
+
+          ngon_faces = []
+          if geometry.is_a?(Array)
+            geometry.each do |obj|
+              state, added_entities = convert_to_native.call(state, obj, layer, definition.entities)
+              if added_entities.length == 1 && added_entities.first.is_a?(Sketchup::Face)
+                ngon_faces.append(added_entities.first)
+              end
+            end
+          end
+          ngon_faces.each do |f|
+            f.edges.each do |e|
+              e.soft = false
+              e.smooth = false
+            end
+          end
+          if geometry.is_a?(Hash) && !definition_obj['speckle_type'].nil?
+            state, _converted_entities = convert_to_native.call(state, geometry, layer, definition.entities)
           end
           # puts("definition finished: #{name} (#{application_id})")
           # puts("    entity count: #{definition.entities.count}")
           definition.behavior.always_face_camera = always_face_camera
           unless sketchup_attributes.nil?
-            SketchupModel::Dictionary::DictionaryHandler
+            SketchupModel::Dictionary::BaseDictionaryHandler
               .attribute_dictionaries_to_native(definition, sketchup_attributes['dictionaries'])
           end
-          definition
+          return state, [definition]
         end
         # rubocop:enable Metrics/CyclomaticComplexity
         # rubocop:enable Metrics/PerceivedComplexity
-        # rubocop:enable Metrics/ParameterLists
+        # rubocop:enable Metrics/MethodLength
+        # rubocop:enable Metrics/AbcSize
 
         # rubocop:disable Metrics/AbcSize
         # rubocop:disable Metrics/MethodLength
         # rubocop:disable Metrics/CyclomaticComplexity
         # rubocop:disable Metrics/PerceivedComplexity
-        def self.group_entities_to_speckle(definition, preferences, speckle_state, parent, &convert)
-          orphan_edges = definition.entities.grep(Sketchup::Edge).filter { |edge| edge.faces.none? }
+        def self.group_entities_to_speckle(entities, preferences, speckle_state, parent, &convert)
+          entities = entities.reject(&:hidden?)
+          orphan_edges = entities.grep(Sketchup::Edge).filter { |edge| edge.faces.none? }
           lines = orphan_edges.collect do |orphan_edge|
             new_speckle_state, converted = convert.call(orphan_edge, preferences, speckle_state, parent)
             speckle_state = new_speckle_state
             converted
           end
 
-          nested_blocks = definition.entities.grep(Sketchup::ComponentInstance).collect do |component_instance|
+          nested_blocks = entities.grep(Sketchup::ComponentInstance).collect do |component_instance|
             new_speckle_state, converted = convert.call(component_instance, preferences, speckle_state, parent)
             speckle_state = new_speckle_state
             converted
           end
 
-          nested_groups = definition.entities.grep(Sketchup::Group).collect do |group|
+          nested_groups = entities.grep(Sketchup::Group).collect do |group|
             new_speckle_state, converted = convert.call(group, preferences, speckle_state, parent)
             speckle_state = new_speckle_state
             converted
@@ -158,7 +181,9 @@ module SpeckleConnector
 
           if preferences[:model][:combine_faces_by_material]
             mesh_groups = {}
-            definition.entities.grep(Sketchup::Face).collect do |face|
+            entities.grep(Sketchup::Face).collect do |face|
+              next unless SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.attribute_dictionary(face).nil?
+
               new_speckle_state = group_meshes_by_material(
                 face, mesh_groups, speckle_state, preferences, parent, &convert
               )
@@ -170,7 +195,7 @@ module SpeckleConnector
             return speckle_state, lines + nested_blocks + nested_groups + mesh_groups.values
           else
             meshes = []
-            definition.entities.grep(Sketchup::Face).collect do |face|
+            entities.grep(Sketchup::Face).collect do |face|
               new_speckle_state, converted = convert.call(face, preferences, speckle_state, parent)
               meshes.append(converted)
               speckle_state = new_speckle_state
@@ -187,7 +212,7 @@ module SpeckleConnector
         # rubocop:disable Metrics/ParameterLists
         def self.group_meshes_by_material(face, mesh_groups, speckle_state, preferences, parent, &convert)
           # convert material
-          mesh_group_id = get_mesh_group_id(face, preferences[:model])
+          mesh_group_id = Geometry::Mesh.get_mesh_group_id(face, preferences[:model])
           new_speckle_state, converted = convert.call(face, preferences, speckle_state, parent)
           mesh_groups[mesh_group_id] = converted unless mesh_groups.key?(mesh_group_id)
           mesh_group = mesh_groups[mesh_group_id]
@@ -197,36 +222,17 @@ module SpeckleConnector
         end
         # rubocop:enable Metrics/ParameterLists
 
-        # Mesh group id helps to determine how to group faces into meshes.
-        # @param face [Sketchup::Face] face to get mesh group id.
-        def self.get_mesh_group_id(face, model_preferences)
-          if model_preferences[:include_entity_attributes] &&
-             model_preferences[:include_face_entity_attributes] &&
-             attribute_dictionary?(face)
-            return face.persistent_id.to_s
+        # It is important check for hosted elements that wrapped into component in sketchup.
+        # Their definition name might be stay same but their speckle ids should be checked
+        # to compare they updated or not.
+        def self.entities_updated?(definition, speckle_definition)
+          children_changed = false
+          unless definition.nil?
+            # TODO: Here we need to check later if definition invalid or not.
+            previous_speckle_id = definition.get_attribute(SPECKLE_BASE_OBJECT, 'speckle_id')
+            children_changed = previous_speckle_id != speckle_definition['id']
           end
-
-          material = face.material || face.back_material
-          return 'none' if material.nil?
-
-          return material.entityID.to_s
-        end
-
-        def self.attribute_dictionary?(face)
-          any_attribute_dictionary = !(face.attribute_dictionaries.nil? || face.attribute_dictionaries.first.nil?)
-          return any_attribute_dictionary unless any_attribute_dictionary
-
-          # If there are any attribute dictionary, then make sure that they are not ignored ones.
-          all_attribute_dictionary_ignored = face.attribute_dictionaries.all? do |dict|
-            ignored_dictionaries.include?(dict.name)
-          end
-          !all_attribute_dictionary_ignored
-        end
-
-        def self.ignored_dictionaries
-          [
-            'Speckle_Base_Object'
-          ]
+          children_changed
         end
       end
     end

speckle_connector/src/speckle_objects/other/block_instance.rb

@@ -5,7 +5,11 @@ require_relative 'transform'
 require_relative 'block_definition'
 require_relative '../base'
 require_relative '../geometry/bounding_box'
-require_relative '../../sketchup_model/dictionary/dictionary_handler'
+require_relative '../other/mapped_block_wrapper'
+require_relative '../built_elements/revit/family_instance'
+require_relative '../../sketchup_model/dictionary/base_dictionary_handler'
+require_relative '../../sketchup_model/dictionary/speckle_schema_dictionary_handler'
+require_relative '../../sketchup_model/query/layer'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -23,8 +27,8 @@ module SpeckleConnector
         # @param sketchup_attributes [Hash{Symbol=>Object}] sketchup attributes of the block instance.
         # @param application_id [String] application id of the block instance.
         # rubocop:disable Metrics/ParameterLists
-        def initialize(units:, is_sketchup_group:, name:, render_material:, transform:, block_definition:,
-                       sketchup_attributes: {}, application_id: nil)
+        def initialize(units:, is_sketchup_group:, name:, render_material:, transform:, block_definition:, layer:,
+                       sketchup_attributes: {}, speckle_schema: {}, application_id: nil)
           super(
             speckle_type: SPECKLE_TYPE,
             total_children_count: 0,
@@ -33,10 +37,12 @@ module SpeckleConnector
           )
           self[:units] = units
           self[:name] = name
+          self[:layer] = layer
           self[:is_sketchup_group] = is_sketchup_group
           self[:renderMaterial] = render_material
           self[:transform] = transform
           self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
+          self[:speckle_schema] = speckle_schema if speckle_schema.any?
           # FIXME: Since blockDefinition sends with @ as detached, block basePlane renders on viewer.
           self['@@definition'] = block_definition
         end
@@ -47,12 +53,10 @@ module SpeckleConnector
           new_speckle_state, block_definition = convert.call(group.definition, preferences, speckle_state,
                                                              group.persistent_id)
           speckle_state = new_speckle_state
-          dictionaries = {}
-          if preferences[:model][:include_entity_attributes] && preferences[:model][:include_group_entity_attributes]
-            dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(group)
-          end
+          dictionaries = SketchupModel::Dictionary::BaseDictionaryHandler
+                         .attribute_dictionaries_to_speckle(group, preferences[:model])
           att = dictionaries.any? ? { dictionaries: dictionaries } : {}
-
+          speckle_schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler.speckle_schema_to_speckle(group)
           block_instance = BlockInstance.new(
             units: units,
             is_sketchup_group: true,
@@ -60,7 +64,9 @@ module SpeckleConnector
             render_material: group.material.nil? ? nil : RenderMaterial.from_material(group.material),
             transform: Other::Transform.from_transformation(group.transformation, units),
             block_definition: block_definition,
+            layer: SketchupModel::Query::Layer.entity_path(group),
             sketchup_attributes: att,
+            speckle_schema: speckle_schema,
             application_id: group.guid
           )
           return speckle_state, block_instance
@@ -68,7 +74,7 @@ module SpeckleConnector
 
         # @param component_instance [Sketchup::ComponentInstance] component instance to convert Speckle BlockInstance
         # rubocop:disable Metrics/MethodLength
-        def self.from_component_instance(component_instance, units, preferences, speckle_state, &convert)
+        def self.from_component_instance(component_instance, units, preferences, speckle_state, path: nil, &convert)
           new_speckle_state, block_definition = convert.call(
             component_instance.definition,
             preferences,
@@ -77,13 +83,20 @@ module SpeckleConnector
           )
           speckle_state = new_speckle_state
 
-          dictionaries = {}
-          if preferences[:model][:include_entity_attributes] &&
-             preferences[:model][:include_component_entity_attributes]
-            dictionaries = SketchupModel::Dictionary::DictionaryHandler
-                           .attribute_dictionaries_to_speckle(component_instance)
-          end
+          dictionaries = SketchupModel::Dictionary::BaseDictionaryHandler
+                         .attribute_dictionaries_to_speckle(component_instance, preferences)
           att = dictionaries.any? ? { dictionaries: dictionaries } : {}
+          speckle_schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler
+                           .speckle_schema_to_speckle(component_instance)
+
+          if speckle_schema.empty?
+            speckle_schema = SketchupModel::Dictionary::SpeckleSchemaDictionaryHandler
+                             .speckle_schema_to_speckle(component_instance.definition)
+          end
+
+          # transform into global if any path provided
+          transformation = component_instance.transformation
+          transformation = SketchupModel::Query::Entity.global_transformation(component_instance, path) if path
 
           block_instance = BlockInstance.new(
             units: units,
@@ -94,26 +107,55 @@ module SpeckleConnector
                              else
                                RenderMaterial.from_material(component_instance.material)
                              end,
-            transform: Other::Transform.from_transformation(component_instance.transformation, units),
+            transform: Other::Transform.from_transformation(transformation, units),
             block_definition: block_definition,
+            layer: SketchupModel::Query::Layer.entity_path(component_instance),
             sketchup_attributes: att,
+            speckle_schema: speckle_schema,
             application_id: component_instance.persistent_id.to_s
           )
+
+          if speckle_schema
+            case speckle_schema['method']
+            when 'New Revit Family'
+              # duplicate already converted one to attach without speckle schema into mapped block wrapper
+              copy_block_instance = block_instance.clone(freeze: true)
+              block_instance['@SpeckleSchema'] = SpeckleObjects::Other::MappedBlockWrapper.new(
+                category: speckle_schema['category'],
+                units: units,
+                instance: copy_block_instance,
+                application_id: component_instance.persistent_id.to_s
+              )
+            when 'Family Instance'
+              level = speckle_state.speckle_mapper_state.mapper_source
+                                   .levels.find { |l| l[:name] == speckle_schema['level'] }
+              family = speckle_schema['family']
+              type = speckle_schema['family_type']
+              block_instance['@SpeckleSchema'] = SpeckleObjects::BuiltElements::Revit::FamilyInstance.new(
+                family: family,
+                type: type,
+                level: level,
+                units: units,
+                base_point: SpeckleObjects::Geometry::Point.from_vertex(
+                  component_instance.definition.insertion_point.transform(transformation),
+                  units
+                ),
+                rotation: calculate_rotation(transformation.to_a),
+                application_id: component_instance.persistent_id.to_s
+              )
+            end
+          end
+
           return speckle_state, block_instance
         end
         # rubocop:enable Metrics/MethodLength
 
         # Creates a component instance from a block
-        # @param sketchup_model [Sketchup::Model] sketchup model to check block definitions.
+        # @param state [States::State] state of the application.
         # @param block [Object] block object that represents Speckle block.
         # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
         # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
-        # rubocop:disable Metrics/AbcSize
-        # rubocop:disable Metrics/MethodLength
-        # rubocop:disable Metrics/ParameterLists
-        # rubocop:disable Metrics/CyclomaticComplexity
-        # rubocop:disable Metrics/PerceivedComplexity
-        def self.to_native(sketchup_model, block, layer, entities, model_preferences, &convert)
+        def self.to_native(state, block, layer, entities, &convert_to_native)
           # is_group = block.key?("is_sketchup_group") && block["is_sketchup_group"]
           # something about this conversion is freaking out if nested block geo is a group
           # so this is set to false always until I can figure this out
@@ -121,57 +163,133 @@ module SpeckleConnector
           # is_group = block['is_sketchup_group']
           # NOTE: nil checks for backward compatibility
           block_definition = block['definition'] || block['blockDefinition'] || block['@blockDefinition']
-          geometry = block_definition['geometry'] || block_definition['@geometry']
-          definition = BlockDefinition.to_native(
-            sketchup_model,
-            geometry,
+
+          state, _definitions = BlockDefinition.to_native(
+            state,
+            block_definition,
             layer,
-            block_definition['name'],
-            block_definition['always_face_camera'].nil? ? false : block_definition['always_face_camera'],
-            model_preferences,
-            block_definition['sketchup_attributes'],
-            block_definition['applicationId'],
-            &convert
+            entities,
+            &convert_to_native
           )
 
-          instance_name = block['name'].nil? || block['name'].empty? ? block['id'] : block['name']
-          t_arr = block['transform'].is_a?(Hash) ? block['transform']['value'] : block['transform']
+          definition = state.sketchup_state.sketchup_model
+                            .definitions[BlockDefinition.get_definition_name(block_definition)]
+
+          block_layer_name = SketchupModel::Query::Layer.entity_layer_from_path(block['layer'])
+          block_layer = state.sketchup_state.sketchup_model.layers.to_a.find { |l| l.display_name == block_layer_name }
+          return add_instance_from_definition(state, block, block_layer, layer, entities, definition, is_group,
+                                              &convert_to_native)
+        end
+
+        def self.get_transform_matrix(block)
+          if block['transform'].is_a?(Hash)
+            block['transform']['matrix'] || block['transform']['value']
+          else
+            block['transform']
+          end
+        end
+
+        # takes a component definition and finds and erases the first instance with the matching name
+        # (and optionally the applicationId)
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/CyclomaticComplexity
+        def self.find_and_erase_existing_instance(definition, upcoming_speckle_id, upcoming_app_id = '')
+          definition.instances.find do |ins|
+            next if ins.attribute_dictionaries.nil?
+            next if ins.attribute_dictionaries.to_a.empty?
+            next if ins.attribute_dictionaries.to_a.none? { |dict| dict.name == SPECKLE_BASE_OBJECT }
+
+            dict = ins.attribute_dictionaries.to_a.find { |d| d.name == SPECKLE_BASE_OBJECT }
+            speckle_id = dict[:speckle_id]
+            application_id = dict[:application_id]
+            speckle_id == upcoming_speckle_id || application_id == upcoming_app_id
+          end&.erase!
+        end
+        # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/CyclomaticComplexity
+
+        # rubocop:disable Metrics/AbcSize
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/ParameterLists
+        def self.add_instance_from_definition(state, block, block_layer, layer, entities, definition, is_group,
+                                              &convert_to_native)
+          t_arr = get_transform_matrix(block)
           transform = Other::Transform.to_native(t_arr, block['units'])
           instance = if is_group
                        # rubocop:disable SketchupSuggestions/AddGroup
                        group = entities.add_group(definition.entities.to_a)
-                       group.layer = layer
+                       group.layer = block_layer.nil? ? layer : block_layer
                        group
                        # rubocop:enable SketchupSuggestions/AddGroup
                      else
                        instance = entities.add_instance(definition, transform)
-                       instance.layer = layer
+                       instance.layer = block_layer.nil? ? layer : block_layer
                        instance
                      end
 
           # erase existing instances after creation and before rename because you can't have definitions
           #  without instances
-          find_and_erase_existing_instance(definition, instance_name, block['applicationId'])
+          find_and_erase_existing_instance(definition, block['id'], block['applicationId'])
           puts("Failed to create instance for speckle block instance #{block['id']}") if instance.nil?
+          # Transform already applied to instance unless is group
           instance.transformation = transform if is_group
-          instance.material = Other::RenderMaterial.to_native(sketchup_model, block['renderMaterial'])
-          instance.name = instance_name
+          state, _materials = Other::RenderMaterial.to_native(state, block['renderMaterial'], layer,
+                                                              entities, &convert_to_native)
+
+          # Retrieve material from state
+          unless block['renderMaterial'].nil?
+            material_name = block['renderMaterial']['name'] || block['renderMaterial']['id']
+            material = state.sketchup_state.materials.by_id(material_name)
+            instance.material = material
+          end
+
+          instance.name = block['name'] unless block['name'].nil?
           unless block['sketchup_attributes'].nil?
-            SketchupModel::Dictionary::DictionaryHandler
+            SketchupModel::Dictionary::BaseDictionaryHandler
               .attribute_dictionaries_to_native(instance, block['sketchup_attributes']['dictionaries'])
           end
-          instance
+          return state, [instance, definition]
         end
         # rubocop:enable Metrics/AbcSize
         # rubocop:enable Metrics/MethodLength
-        # rubocop:enable Metrics/ParameterLists
         # rubocop:enable Metrics/CyclomaticComplexity
         # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/ParameterLists
 
-        # takes a component definition and finds and erases the first instance with the matching name
-        # (and optionally the applicationId)
-        def self.find_and_erase_existing_instance(definition, name, app_id = '')
-          definition.instances.find { |ins| ins.name == name || ins.guid == app_id }&.erase!
+        # Instances that created from display value that has no any transform value.
+        # Because of this reason their definition created with origin axis. We basically create transformation
+        # vector between bounds min to origin, to move definition axis to bounds min. Otherwise they looks weird in
+        # sketchup and might be cumbersome when we want to add new entities into definition.
+        # @param instance [Sketchup::ComponentInstance] instance to align axis to it's bounds
+        def self.align_instance_axes(instance)
+          bounds = instance.bounds
+          transform = Geom::Transformation.translation(bounds.min.vector_to(Geom::Point3d.new(0, 0, 0)))
+          entities = instance.definition.entities
+          entities.transform_entities(transform, entities.to_a)
+          instance_transform = instance.transformation
+          instance.transform!(instance_transform * transform.inverse * instance_transform.inverse)
+        end
+
+        def self.calculate_rotation(matrix)
+          # Ensure the matrix is a flat array with 16 elements
+          unless matrix.is_a?(Array) && matrix.size == 16
+            raise ArgumentError, 'Matrix must be an array with 16 elements'
+          end
+
+          # Extract the elements of the 2x2 rotation sub-matrix
+          cos_theta = matrix[0] # First column, first row
+          sin_theta = matrix[1] # Second column, first row
+
+          # Calculate the rotation angle in radians
+          theta = Math.atan2(sin_theta, cos_theta)
+
+          # Ensure the angle is between -π and π
+          theta -= 2 * Math::PI while theta > Math::PI
+          theta += 2 * Math::PI while theta < -Math::PI
+
+          theta
         end
       end
     end

speckle_connector/src/speckle_objects/other/color.rb

@@ -2,7 +2,7 @@
 
 module SpeckleConnector
   module SpeckleObjects
-    module Others
+    module Other
       # Color object transformations between sketchup and speckle.
       class Color
         # @param color [Sketchup::Color] color to convert speckle object
@@ -16,9 +16,24 @@ module SpeckleConnector
         end
 
         def self.to_native(speckle_color)
+          return from_int(speckle_color) if speckle_color.is_a?(Numeric)
+
           Sketchup::Color.new(speckle_color['red'], speckle_color['green'],
                               speckle_color['blue'], speckle_color['alpha'])
         end
+
+        # @param color [Sketchup::Color] color to convert speckle object
+        # @return [Numeric] int value of the color
+        def self.to_int(color)
+          rgba = color.to_a
+          [rgba[3] << 24 | rgba[0] << 16 | rgba[1] << 8 | rgba[2]].pack('l').unpack1('l').to_i
+        end
+
+        # @param argb [Numeric] int value of the corresponding color
+        # @return [Sketchup::Color] sketchup color
+        def self.from_int(argb)
+          Sketchup::Color.new((argb >> 16) & 255, (argb >> 8) & 255, argb & 255, (argb >> 24) & 255)
+        end
       end
     end
   end

speckle_connector/src/speckle_objects/other/display_style.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require_relative 'color'
+require_relative '../base'
+require_relative '../../constants/type_constants'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Other
+      # DisplayStyle object for layer.
+      class DisplayStyle < Base
+        def initialize(name:, color:, line_type:)
+          super(
+            speckle_type: OBJECTS_OTHER_DISPLAYSTYLE,
+            total_children_count: 0,
+            application_id: nil,
+            id: nil
+          )
+          self[:name] = name
+          self[:color] = color
+          self[:linetype] = line_type unless line_type.nil?
+        end
+
+        # @param layer [Sketchup::Layer] layer to get display style.
+        def self.from_layer(layer)
+          DisplayStyle.new(
+            name: '',
+            color: Color.to_int(layer.color),
+            line_type: layer.line_style.nil? ? nil : layer.line_style.name
+          )
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/display_value.rb

@@ -0,0 +1,107 @@
+# frozen_string_literal: true
+
+require_relative 'render_material'
+require_relative 'transform'
+require_relative 'block_definition'
+require_relative '../../immutable/immutable'
+require_relative '../../ext/immutable_ruby/hash'
+require_relative '../base'
+require_relative '../geometry/bounding_box'
+require_relative '../../sketchup_model/dictionary/base_dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Other
+      # DisplayValue object definition for Speckle that represents as BlockInstance in Sketchup.
+      class DisplayValue
+        def self.get_definition_name(def_obj)
+          family = def_obj['family']
+          type = def_obj['type']
+          category = def_obj['category']
+          element_id = def_obj['elementId']
+
+          return format_naming_convention([family, type, category, element_id]) unless element_id.nil?
+
+          name = def_obj['name']
+          return "#{name}::#{def_obj['applicationId']}" if !name.nil? && !def_obj['applicationId'].nil?
+
+          return "#{name}::#{def_obj['id']}" unless name.nil?
+
+          speckle_type = def_obj['speckle_type'].split('.').last
+          return "#{speckle_type}::#{def_obj['applicationId']}" unless def_obj['applicationId'].nil?
+
+          return "#{speckle_type}::#{def_obj['id']}"
+        end
+
+        def self.format_naming_convention(entries)
+          name = ''
+          entries.each_with_index do |entry, index|
+            next if entry.nil?
+
+            name += if index == entries.length - 1
+                      entry.to_s
+                    else
+                      "#{entry}-"
+                    end
+          end
+          name
+        end
+
+        # Get instance name as speckle_type if it is structured as `speckle_type::application_id`
+        def self.get_instance_name(definition_name)
+          return definition_name unless definition_name.include?('::')
+
+          definition_name.split('::').first
+        end
+
+        # Creates a component definition and instance from a speckle object with a display value
+        # @param state [States::State] state of the application.
+        def self.to_native(state, obj, layer, entities, &convert_to_native)
+          # Switch displayValue with geometry
+          obj = collect_definition_geometries(obj)
+          obj['name'] = get_definition_name(obj)
+
+          state, _definitions = BlockDefinition.to_native(
+            state, obj, layer, entities, &convert_to_native
+          )
+
+          definition = state.sketchup_state.sketchup_model.definitions[BlockDefinition.get_definition_name(obj)]
+
+          BlockInstance.find_and_erase_existing_instance(definition, obj['id'], obj['applicationId'])
+          t_arr = obj['transform']
+          transform = t_arr.nil? ? Geom::Transformation.new : Other::Transform.to_native(t_arr, obj['units'])
+          instance = entities.add_instance(definition, transform)
+          instance.name = get_instance_name(obj['name']) unless obj['name'].nil?
+          instance.layer = layer unless layer.nil?
+          # Align instance axes that created from display value. (without any transform)
+          # BlockInstance.align_instance_axes(instance)
+          return state, [instance, definition]
+        end
+
+        def self.collect_definition_geometries(obj)
+          obj['geometry'] = obj['displayValue'] || obj['@displayValue']
+
+          elements = obj['elements'] || obj['@elements']
+
+          # if only elements are there then assign only elements, there are some cases that RevitWalls can only
+          # have elements instead of display value
+          if obj['geometry'].nil? && !elements.nil?
+            obj['geometry'] = elements
+          else
+            if !elements.nil? && elements.is_a?(Array)
+              elements.each do |element|
+                # Mullions is a special case here, they are extracted as base object with @displayValue from revit..
+                if element['@displayValue'].nil?
+                  obj['geometry'].append(element)
+                else
+                  obj['geometry'] += element['@displayValue']
+                end
+              end
+            end
+          end
+          obj
+        end
+      end
+    end
+  end
+end