Update blender_commit_object_builder.py

Fixed issue with uint32 vertex colours not parsing

.circleci/config.yml

@@ -1,89 +1,110 @@
 version: 2.1
 
 orbs:
-  python: circleci/python@1.3.2
-  # Using windows for builds
-  win: circleci/windows@2.4.0
-  # Upload artifacts to s3
-  aws-s3: circleci/aws-s3@2.0.0
+  win: circleci/windows@5.0.0
 
 jobs:
-  build-connector: # Reusable job for basic connectors
-    executor:
-      name: win/default # comes with python 3.7.3
-      shell: cmd.exe
-    parameters:
-      slug:
-        type: string
-        default: ""
+  package-connector:
+    docker:
+      - image: cimg/python:3.11.0
     steps:
       - checkout
-      - attach_workspace:
-          at: ./
       - run:
-          name: Install specklepy with python 3.7 for Blender v2.93
-          shell: powershell.exe
+          name: Setup SEMVER value
           command: |
-            $pyarr=(python --version).split(' ')[1].split('.')
-            $pyver=($pyarr[0..1] -join '.')
-            echo "using python version:" $pyver
-            $specklepy=(python patch_version.py)
-            python -m pip install --target=./modules-$pyver specklepy==$specklepy
+            SEMVER=$(if [ "${CIRCLE_TAG}" ]; then echo $CIRCLE_TAG; else echo "0.0.0"; fi;)
+            echo $SEMVER > ./SEMVER
+            python3 patch_version.py $SEMVER
       - run:
-          name: Install python 3.9 and specklepy for Blender v3.0
-          shell: powershell.exe
-          command: |
-            choco upgrade python --version=3.9.7
-            refreshenv
-            $pyarr=(py --version).split(' ')[1].split('.')
-            $pyver=($pyarr[0..1] -join '.')
-            echo "using python version:" $pyver
-            $specklepy=(python patch_version.py)
-            py -m pip install --target=./modules-$pyver specklepy==$specklepy
+          name: install dependencies
+          command: poetry install --only main
       - run:
-          name: Install python 3.10 and specklepy for Blender v3.1
-          shell: powershell.exe
-          command: |
-            choco upgrade python --version=3.10.2
-            refreshenv
-            $pyarr=(py --version).split(' ')[1].split('.')
-            $pyver=($pyarr[0..1] -join '.')
-            echo "using python version:" $pyver
-            $specklepy=(python patch_version.py)
-            py -m pip install --target=./modules-$pyver specklepy==$specklepy
-      - run:
-          name: Patch
-          shell: powershell.exe
-          command:
-            | # If no tag, use 0.0.0.1 and don't make any YML (for testing only!)
-            $tag = if([string]::IsNullOrEmpty($env:CIRCLE_TAG)) { "0.0.0" } else { $env:CIRCLE_TAG }
-            $semver = if($tag.Contains('/')) {$tag.Split("/")[1] } else { $tag }
-            $ver = if($semver.Contains('-')) {$semver.Split("-")[0] } else { $semver }
-            $version = "$($ver).$($env:CIRCLE_BUILD_NUM)"
-            $channel = if($semver.Contains('-')) {$semver.Split("-")[1] } else { "latest" }
-            New-Item -Force "speckle-sharp-ci-tools/Installers/blender/$channel.yml" -ItemType File -Value "version: $semver"
-            echo $semver
-            echo $version
-            python patch_version.py $version
-            speckle-sharp-ci-tools\InnoSetup\ISCC.exe speckle-sharp-ci-tools\blender.iss
+          name: export package dependencies
+          command: ./export_dependencies.sh
       - persist_to_workspace:
           root: ./
           paths:
-            - speckle-sharp-ci-tools/Installers
+            - bpy_speckle
+            - patch_installer.py
+            - SEMVER
 
-  build-connector-mac:
+  build-connector-zip:
+    docker:
+      - image: cimg/python:3.11.0
+    steps:
+      - attach_workspace:
+          at: ./
+      - run: &restore_semver
+          name: Restore Semver
+          command: SEMVER=$(cat ./SEMVER) && echo $SEMVER
+      - run:
+          name: Package to Zip
+          command: zip -r bpy_speckle.zip bpy_speckle
+      - persist_to_workspace:
+          root: ./
+          paths:
+            - bpy_speckle.zip
+  
+  get-ci-tools: # Clones our ci tools and persists them to the workspace
+    docker:
+      - image: cimg/base:2021.01
+    steps:
+      - add_ssh_keys:
+          fingerprints:
+            - "77:64:03:93:c5:f3:1d:a6:fd:bd:fb:d1:05:56:ca:e9"
+      - run:
+          name: I know Github as a host
+          command: |
+            mkdir ~/.ssh
+            touch ~/.ssh/known_hosts
+            ssh-keyscan github.com >> ~/.ssh/known_hosts
+      - run:
+          name: Clone
+          command: git clone git@github.com:specklesystems/speckle-sharp-ci-tools.git speckle-sharp-ci-tools
+      - run:
+          command: cd speckle-sharp-ci-tools
+      - persist_to_workspace:
+          root: ./
+          paths:
+            - speckle-sharp-ci-tools
+
+  build-installer-win:
+    executor:
+      name: win/default
+      shell: cmd.exe
+    steps:
+      - attach_workspace:
+          at: ./
+      - run:
+          name: Patch installer
+          shell: powershell.exe
+          command: python patch_installer.py (Get-Content -Raw SEMVER)
+      - run:
+          name: Create Innosetup signing cert
+          shell: powershell.exe
+          command: |
+            echo $env:PFX_B64 > "speckle-sharp-ci-tools\SignTool\AEC Systems Ltd.txt"
+            certutil -decode "speckle-sharp-ci-tools\SignTool\AEC Systems Ltd.txt" "speckle-sharp-ci-tools\SignTool\AEC Systems Ltd.pfx"
+      - run:
+          name: Installer
+          shell: cmd.exe #does not work in powershell
+          command: speckle-sharp-ci-tools\InnoSetup\ISCC.exe speckle-sharp-ci-tools\blender.iss /Sbyparam=$p
+      - persist_to_workspace:
+          root: ./
+          paths:
+            - speckle-sharp-ci-tools/Installers/blender/blender-*.exe
+
+  build-installer-mac:
     macos:
       xcode: 12.5.1
     parameters:
-      build-config:
+      runtime:
         type: string
-        default: Release
       slug:
         type: string
-        default: "blender-mac"
-      installername:
+      installer_path:
         type: string
-        default: "SpeckleBlenderInstall"
+        default: speckle-sharp-ci-tools/Mac/SpeckleBlenderInstall
     steps:
       - checkout
       - attach_workspace:
@@ -96,149 +117,191 @@ jobs:
       - run:
           name: Install dotnet
           command: curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin
-      - run:
-          name: Install python 3.10
-          command: |
-            brew install python@3.10
-            brew link --overwrite python@3.10
-      - run:
-          name: Build & Patch Version
-          command: |
-            TAG=$(if [ "${CIRCLE_TAG}" ]; then echo $CIRCLE_TAG; else echo "0.0.0"; fi;)
-            SEMVER=$(echo "$TAG" | sed -e 's/[a-zA-Z-]*\///')
-            VER=$(echo "$SEMVER" | sed -e 's/-beta//')
-            VERSION=$(echo $VER.$CIRCLE_BUILD_NUM)
-            CHANNEL=$(if [[ "$VERSION" == *"-"* ]]; then echo $(cut -d "-" -f2 \<\<\< $VERSION); else echo latest; fi)
-            mkdir -p speckle-sharp-ci-tools/Installers/<< parameters.slug >>
-            if [ "${CIRCLE_TAG}" ]; then echo "version: $SEMVER" > "speckle-sharp-ci-tools/Installers/<< parameters.slug >>/$CHANNEL.yml"; fi
-            python3 patch_version.py $VERSION
-      - run:
-          name: Zip Connector files
-          command: |
-            zip -r << parameters.slug >>.zip bpy_speckle/
+      - run: *restore_semver
       - run:
           name: Copy connector files to installer
           command: |
-            mkdir -p speckle-sharp-ci-tools/Mac/<<parameters.installername>>/.installationFiles/
-            cp << parameters.slug >>.zip speckle-sharp-ci-tools/Mac/<<parameters.installername>>/.installationFiles
-            python3 patch_version.py > speckle-sharp-ci-tools/Mac/<<parameters.installername>>/.installationFiles/specklepy_ver.yml
-      - run:
-          name: Package specklepy dependencies for blender 3.1
-          command: |
-            python3 --version
-            python3 -m pip install --target=./modules-intel-3.10 specklepy==$(python3 -m patch_version)
-            zip -r modules-intel-3.10.zip modules-intel-3.10/
-            cp modules-intel-3.10.zip speckle-sharp-ci-tools/Mac/<<parameters.installername>>/.installationFiles/blender-3.1
+            mkdir -p <<parameters.installer_path >>/.installationFiles/
+            cp bpy_speckle.zip << parameters.installer_path >>/.installationFiles
       - run:
           name: Build Mac installer
-          command: ~/.dotnet/dotnet publish speckle-sharp-ci-tools/Mac/<<parameters.installername>>/<<parameters.installername>>.sln -r osx-x64 -c Release
+          command: ~/.dotnet/dotnet publish << parameters.installer_path >>/SpeckleBlenderInstall.sln -r << parameters.runtime >> -c Release
       - run:
           name: Zip installer
           command: |
-            cd speckle-sharp-ci-tools/Mac/<<parameters.installername>>/bin/Release/net6.0/osx-x64/
-            zip -r << parameters.slug >>.zip ./
-      - store_artifacts:
-          path: speckle-sharp-ci-tools/Mac/<<parameters.installername>>/bin/Release/net6.0/osx-x64/<< parameters.slug >>.zip
-      - run:
-          name: Copy to installer location
-          command: |
-            TAG=$(if [ "${CIRCLE_TAG}" ]; then echo $CIRCLE_TAG; else echo "0.0.0"; fi;)
-            SEMVER=$(echo "$TAG" | sed -e 's/[a-zA-Z-]*\///')
-            cp speckle-sharp-ci-tools/Mac/<<parameters.installername>>/bin/Release/net6.0/osx-x64/<< parameters.slug >>.zip speckle-sharp-ci-tools/Installers/<< parameters.slug >>/<< parameters.slug >>-$SEMVER.zip
+            SEMVER=$(cat ./SEMVER)
+            echo $SEMVER
+            mkdir -p speckle-sharp-ci-tools/Installers/blender
+            (cd <<parameters.installer_path>>/bin/Release/net6.0/<< parameters.runtime >>/publish/ && zip -r - ./) > << parameters.slug >>-${SEMVER}.zip
+            cp << parameters.slug >>-${SEMVER}.zip speckle-sharp-ci-tools/Installers/blender/
+
       - persist_to_workspace:
           root: ./
           paths:
-            - speckle-sharp-ci-tools/Installers
+            - speckle-sharp-ci-tools/Installers/blender/<< parameters.slug >>*.zip
 
-  install-specklepy: # due to ujson dep, we need to match the py version to the install
+  build-installer-manual:
     docker:
-      - image: "cimg/python:<<parameters.tag>>"
+      - image: cimg/base:2021.01
     parameters:
-      tag:
-        default: "3.9"
+      slug:
         type: string
-    steps:
-      - checkout
-      - run:
-          name: upgrade pip and install specklepy
-          command: |
-            specklepyver=$(python patch_version.py)
-            echo installing specklepy $specklepyver
-            python -m pip install --target=./modules-<<parameters.tag>> specklepy==$specklepyver
-      - persist_to_workspace:
-          root: ./
-          paths:
-            - modules-*
-
-  get-ci-tools: # Clones our ci tools and persists them to the workspace
-    docker:
-      - image: cimg/base:2021.01
-    steps:
-      - run: # Could not get ssh to work, so using a personal token
-          name: Clone
-          command: git clone https://$GITHUB_TOKEN@github.com/specklesystems/speckle-sharp-ci-tools.git speckle-sharp-ci-tools
-      - persist_to_workspace:
-          root: ./
-          paths:
-            - speckle-sharp-ci-tools
-
-  deploy: # Uploads all installers found to S3
-    docker:
-      - image: cimg/base:2021.01
+        default: bpy_speckle
     steps:
       - attach_workspace:
           at: ./
+      - run: *restore_semver
       - run:
-          name: List contents
-          command: ls -R speckle-sharp-ci-tools/Installers
-      - aws-s3/copy:
-          arguments: "--recursive --endpoint=https://$SPACES_REGION.digitaloceanspaces.com --acl public-read"
-          aws-access-key-id: SPACES_KEY
-          aws-region: SPACES_REGION
-          aws-secret-access-key: SPACES_SECRET
-          from: '"speckle-sharp-ci-tools/Installers/"'
-          to: s3://speckle-releases/installers/
+          name: Copy zip with semver
+          command: |
+            SEMVER=$(cat ./SEMVER)
+            mkdir -p speckle-sharp-ci-tools/Installers/blender
+            cp bpy_speckle.zip speckle-sharp-ci-tools/Installers/blender/<< parameters.slug >>-${SEMVER}.zip
+      - persist_to_workspace:
+          root: ./
+          paths:
+            - speckle-sharp-ci-tools/Installers/blender/<< parameters.slug >>*.zip
+
+  deploy-connector:
+    docker:
+      - image: mcr.microsoft.com/dotnet/sdk:6.0
+    parameters:
+      file_slug:
+        type: string
+      os:
+        type: string
+      extension:
+        type: string
+      arch:
+        type: string
+        default: Any
+    steps:
+      - checkout
+      - attach_workspace:
+          at: ./
+      - run:
+          name: Install Manager Feed CLI
+          command: dotnet tool install --global Speckle.Manager.Feed
+      - run: *restore_semver
+      - run:
+          name: Upload new version
+          # this is where the installer gets the semver baked into the file name
+          command: |
+            SEMVER=$(cat ./SEMVER)
+            echo $SEMVER
+            /root/.dotnet/tools/Speckle.Manager.Feed deploy \
+                -s blender \
+                -v ${SEMVER} \
+                -u https://releases.speckle.dev/installers/blender/<< parameters.file_slug >>-${SEMVER}.<< parameters.extension >> \
+                -o << parameters.os >> \
+                -a << parameters.arch >> \
+                -f speckle-sharp-ci-tools/Installers/blender/<< parameters.file_slug >>-${SEMVER}.<< parameters.extension >>
 
 workflows:
-  main:
+  build: # build the installers, but don't persist to workspace for deployment
     jobs:
+      - package-connector:
+          filters: &build_filters
+            tags:
+              only: /([0-9]+)\.([0-9]+)\.([0-9]+)(?:-\w+)?(?:\.[0-9]+)?/
+      
+      - build-connector-zip:
+          requires:
+            - package-connector
+          filters: *build_filters
+
       - get-ci-tools:
-          filters:
-            tags:
-              only: /.*/
+          filters: *build_filters
+
+      - build-installer-win:
+          context: innosetup
+          name: Windows Installer Build
+          requires:
+            - package-connector
+            - get-ci-tools
+          filters: *build_filters
+
+      - deploy-connector:
+          context: do-spaces-speckle-releases
+          name: deploy-windows
+          file_slug: blender
+          os: WIN
+          arch: Any
+          extension: exe
+          requires:
+            - Manual Installer Build
+            - Windows Installer Build
+            - Mac Intel Build
+            - Mac ARM Build
+          filters: &deploy_filters
             branches:
-              only:
-                - main
-                - /ci\/.*/
-      - build-connector:
-          slug: blender
+              ignore: /.*/
+            tags:
+              only: /([0-9]+)\.([0-9]+)\.([0-9]+)(?:-\w+)?(?:\.[0-9]+)?/
+
+      - build-installer-mac:
+          name: Mac ARM Build
+          slug: blender-mac-arm
+          runtime: osx-arm64
           requires:
             - get-ci-tools
-          filters:
-            tags:
-              only: /.*/
-            branches:
-              only:
-                - main
-                - /ci\/.*/
-      - build-connector-mac:
-          slug: blender-mac
+            - build-connector-zip
+          filters: *build_filters
+
+      - deploy-connector:
+          context: do-spaces-speckle-releases
+          name: deploy-mac-arm
+          file_slug: blender-mac-arm
+          os: OSX
+          arch: Arm
+          extension: zip
+          requires:
+            - Manual Installer Build
+            - Windows Installer Build
+            - Mac Intel Build
+            - Mac ARM Build
+          filters: *deploy_filters
+
+      - build-installer-mac:
+          name: Mac Intel Build
+          slug: blender-mac-intel
+          runtime: osx-x64
           requires:
             - get-ci-tools
-          filters:
-            tags:
-              only: /.*/
-            branches:
-              only:
-                - main
-                - /ci\/.*/
-      - deploy:
+            - build-connector-zip
+          filters: *build_filters
+
+      - deploy-connector:
+          context: do-spaces-speckle-releases
+          name: deploy-mac-intel
+          file_slug: blender-mac-intel
+          os: OSX
+          arch: Intel
+          extension: zip
+          requires:
+            - Manual Installer Build
+            - Windows Installer Build
+            - Mac Intel Build
+            - Mac ARM Build
+          filters: *deploy_filters
+
+      - build-installer-manual:
+          name: Manual Installer Build
           requires:
             - get-ci-tools
-            - build-connector
-            - build-connector-mac
-          filters:
-            tags:
-              only: /([0-9]+)\.([0-9]+)\.([0-9]+)(?:-\w+)?$/
-            branches:
-              ignore: /.*/ # For testing only! /ci\/.*/
+            - build-connector-zip
+          filters: *build_filters
+
+      - deploy-connector:
+          context: do-spaces-speckle-releases
+          name: deploy-manual
+          file_slug: bpy_speckle
+          os: Any
+          arch: Any
+          extension: zip
+          requires:
+            - Manual Installer Build
+            - Windows Installer Build
+            - Mac Intel Build
+            - Mac ARM Build
+          filters: *deploy_filters

.github/workflows/close-issue.yml

@@ -6,73 +6,7 @@ on:
 
 jobs:
   update_issue:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Get project data
-        env:
-          GITHUB_TOKEN: ${{secrets.GHPROJECT_TOKEN}}
-          ORGANIZATION: specklesystems
-          PROJECT_NUMBER: 9
-        run: |
-          gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
-            query($org: String!, $number: Int!) {
-              organization(login: $org){
-                projectNext(number: $number) {
-                  id
-                  fields(first:20) {
-                    nodes {
-                      id
-                      name
-                      settings
-                    }
-                  }
-                }
-              }
-            }' -f org=$ORGANIZATION -F number=$PROJECT_NUMBER > project_data.json
-
-          echo 'PROJECT_ID='$(jq '.data.organization.projectNext.id' project_data.json) >> $GITHUB_ENV
-          echo 'STATUS_FIELD_ID='$(jq '.data.organization.projectNext.fields.nodes[] | select(.name== "Status") | .id' project_data.json) >> $GITHUB_ENV
-          
-          echo "$PROJECT_ID"
-          echo "$STATUS_FIELD_ID"
-          
-          echo 'DONE_ID='$(jq '.data.organization.projectNext.fields.nodes[] | select(.name== "Status") | .settings | fromjson | .options[] | select(.name== "Done") | .id' project_data.json) >> $GITHUB_ENV
-          echo "$DONE_ID"
-
-      - name: Add Issue to project #it's already in the project, but we do this to get its node id!
-        env:
-          GITHUB_TOKEN: ${{secrets.GHPROJECT_TOKEN}}
-          ISSUE_ID: ${{ github.event.issue.node_id }}
-        run: |
-          item_id="$( gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
-            mutation($project:ID!, $id:ID!) {
-              addProjectNextItem(input: {projectId: $project, contentId: $id}) {
-                projectNextItem {
-                  id
-                }
-              }
-            }' -f project=$PROJECT_ID -f id=$ISSUE_ID --jq '.data.addProjectNextItem.projectNextItem.id')"
-          
-          echo 'ITEM_ID='$item_id >> $GITHUB_ENV
-          
-      - name: Update Status
-        env:
-          GITHUB_TOKEN: ${{secrets.GHPROJECT_TOKEN}}
-          ISSUE_ID: ${{ github.event.issue.node_id }}
-        run: |
-          gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
-            mutation($project:ID!, $status:ID!, $id:ID!, $value:String!) {
-              set_status: updateProjectNextItemField(
-                input: {
-                  projectId: $project
-                  itemId: $id
-                  fieldId: $status
-                  value: $value
-                }
-              ) {
-                projectNextItem {
-                  id
-                }
-              }
-            }' -f project=$PROJECT_ID -f status=$STATUS_FIELD_ID -f id=$ITEM_ID -f value=${{ env.DONE_ID }}
-          
+    uses: specklesystems/github-actions/.github/workflows/project-add-issue.yml@main
+    secrets: inherit
+    with:
+      issue-id: ${{ github.event.issue.node_id }}

.github/workflows/open-issue.yml

@@ -6,45 +6,7 @@ on:
 
 jobs:
   track_issue:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Get project data
-        env:
-          GITHUB_TOKEN: ${{secrets.GHPROJECT_TOKEN}}
-          ORGANIZATION: specklesystems
-          PROJECT_NUMBER: 9
-        run: |
-          gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
-            query($org: String!, $number: Int!) {
-              organization(login: $org){
-                projectNext(number: $number) {
-                  id
-                  fields(first:20) {
-                    nodes {
-                      id
-                      name
-                      settings
-                    }
-                  }
-                }
-              }
-            }' -f org=$ORGANIZATION -F number=$PROJECT_NUMBER > project_data.json
-
-          echo 'PROJECT_ID='$(jq '.data.organization.projectNext.id' project_data.json) >> $GITHUB_ENV
-          echo 'STATUS_FIELD_ID='$(jq '.data.organization.projectNext.fields.nodes[] | select(.name== "Status") | .id' project_data.json) >> $GITHUB_ENV
-     
-      - name: Add Issue to project
-        env:
-          GITHUB_TOKEN: ${{secrets.GHPROJECT_TOKEN}}
-          ISSUE_ID: ${{ github.event.issue.node_id }}
-        run: |
-          item_id="$( gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
-            mutation($project:ID!, $id:ID!) {
-              addProjectNextItem(input: {projectId: $project, contentId: $id}) {
-                projectNextItem {
-                  id
-                }
-              }
-            }' -f project=$PROJECT_ID -f id=$ISSUE_ID --jq '.data.addProjectNextItem.projectNextItem.id')"
-          
-          echo 'ITEM_ID='$item_id >> $GITHUB_ENV
+    uses: specklesystems/github-actions/.github/workflows/project-add-issue.yml@main
+    secrets: inherit
+    with:
+      issue-id: ${{ github.event.issue.node_id }}

.gitignore

@@ -10,4 +10,7 @@ __pycache__/
 # dev
 .venv
 Installers/
-modules/
+modules/
+.tool-versions
+requirements.txt
+SEMVER

README.md

@@ -3,7 +3,7 @@
   Speckle | Blender
 </h1>
 <h3 align="center">
-    Connector for Blender 2.92 & 2.93
+    Connector for Blender
 </h3>
 <p align="center"><b>Speckle</b> is the data infrastructure for the AEC industry.</p><br/>
 
@@ -91,4 +91,4 @@ The Speckle Community hangs out on [the forum](https://discourse.speckle.works),
 Unless otherwise described, the code in this repository is licensed under the Apache-2.0 License. Please note that some modules, extensions or code herein might be otherwise licensed. This is indicated either in the root of the containing folder under a different license file, or in the respective file's header. If you have any questions, don't hesitate to get in touch with us via [email](mailto:hello@speckle.systems).
 
 ## Notes
-SpeckleBlender is written and maintained by [Tom Svilans](http://tomsvilans.com) ([Github](https://github.com/tsvilans)).
+Thanks to [Tom Svilans](http://tomsvilans.com) ([Github](https://github.com/tsvilans)) for the original v1 contribution!

bpy_speckle/__init__.py

@@ -1,25 +1,15 @@
-# MIT License
+import bpy
+from bpy_speckle.installer import ensure_dependencies
 
-# Copyright (c) 2018-2021 Tom Svilans
+ensure_dependencies(f"Blender {bpy.app.version[0]}.{bpy.app.version[1]}")
 
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
+from specklepy.logging import metrics
 
+from bpy_speckle.ui import *
+from bpy_speckle.properties import *
+from bpy_speckle.operators import *
+from bpy_speckle.callbacks import *
+from bpy.app.handlers import persistent
 
 bl_info = {
     "name": "SpeckleBlender 2.0",
@@ -33,45 +23,26 @@ bl_info = {
     "category": "Scene",
 }
 
-import bpy
 
-"""
-Import PySpeckle and attempt install if not found
-"""
-
-try:
-    import specklepy
-except ModuleNotFoundError as error:
-    print("Speckle not found.")
-    # TODO: Implement automatic installation of speckle and dependencies
-    # to the local Blender module folder
-
-    # from .install_dependencies import install_dependencies
-    # install_dependencies()
 
 """
 Import SpeckleBlender classes
 """
 
-from specklepy.api.client import SpeckleClient  # , SpeckleCache
-from specklepy.logging import metrics
-
-from bpy_speckle.ui import *
-from bpy_speckle.properties import *
-from bpy_speckle.operators import *
-from bpy_speckle.callbacks import *
-from bpy.app.handlers import persistent
-
 """
 Add load handler to initialize Speckle when 
 loading a Blender file
 """
 
-
 @persistent
 def load_handler(dummy):
-    bpy.ops.speckle.users_load()
-
+    pass
+    # Calling users_load is an expensive operation, one that force users to wait a good 10s every time blender loads.
+    # Until we can do this non-blocking, we will make the user hit the refresh button each time.
+    #bpy.ops.speckle.users_load()
+    
+    # Instead, we shall just reset the user selection to an uninitiailised state
+    bpy.ops.speckle.users_reset()
 
 """
 Permanent handle on callbacks

bpy_speckle/blender_commit_object_builder.py

@@ -0,0 +1,120 @@
+from typing import Dict, Optional, Tuple, Union
+import bpy
+from bpy.types import Object, Collection, ID
+from specklepy.objects.base import Base
+from bpy_speckle.functions import _report
+from bpy_speckle.specklepy_extras.commit_object_builder import CommitObjectBuilder, ROOT
+from specklepy.objects import Base
+from specklepy.objects.other import Collection as SCollection
+from attrs import define
+
+ELEMENTS = "elements"
+
+def _id(natvive_object: ID) -> str:
+    #NOTE: to avoid naming collisions, we prefix collections and objects differently
+    return f"{type(natvive_object).__name__}:{natvive_object.name_full}" 
+
+def _try_id(natvive_object: Optional[Union[Collection, Object]]) -> Optional[str]:
+    return _id(natvive_object) if natvive_object else None
+
+def convert_collection_to_speckle(col: Collection) -> SCollection:
+    convered_collection = SCollection(name = col.name_full, collectionType = "Blender Collection", elements = [])
+    convered_collection.applicationId = _id(col)
+
+    color_tag = col.color_tag
+    if color_tag and color_tag != "NONE":
+        convered_collection["colorTag"] = col.color_tag
+
+    return convered_collection
+
+@define(slots=True)
+class BlenderCommitObjectBuilder(CommitObjectBuilder[Object]):
+
+    _collections: Dict[str, SCollection]
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._collections = {}
+
+    def include_object(self, conversion_result: Base, native_object: Object) -> None:
+
+        # Set the Child -> Parent relationships
+        parent = native_object.parent
+        
+        parent_collections: Tuple[Collection] = native_object.users_collection # type: ignore 
+        parent_collection = parent_collections[0] if len(parent_collections) > 0 else None #NOTE: we don't support objects appearing in more than one collection, for now, we will just take the zeroth one
+        
+        app_id = _id(native_object)
+        conversion_result.applicationId = app_id
+        self.converted[app_id] = conversion_result
+
+        # in order or priority, direct parent, direct parent collection, root
+        self.set_relationship(app_id, (_try_id(parent), ELEMENTS), (_try_id(parent_collection), ELEMENTS), (ROOT, ELEMENTS))
+        # if parent_collection:
+        #     self._include_collection(parent_collection)
+
+    def ensure_collection(self, col: Collection) -> SCollection:
+        id = _id(col)
+        if id in self._collections:
+            return self._collections[id] # collection already converted!
+
+         # Set the Parent -> Children relationships
+        for c in col.children:
+            #NOTE: There's no falling back to the grandparent, if the direct parent collection wasn't converted, then we we fallback to the root
+            self.set_relationship(_id(c), (id, ELEMENTS), (ROOT, ELEMENTS)) 
+
+        # Set Child -> Parent relationship
+        # parent = self.find_collection_parent(col)
+        # self.set_relationship(id, (_try_builder_id(parent), ELEMENTS), (ROOT, ELEMENTS)) 
+
+        convered_collection = convert_collection_to_speckle(col)
+        self.converted[id] = convered_collection
+        self._collections[id] = convered_collection
+
+        return convered_collection
+
+    def build_commit_object(self, root_commit_object: Base) -> None:
+        assert(root_commit_object.applicationId in self.converted)
+
+        # Create all collections
+        root_col = self.ensure_collection(bpy.context.scene.collection)
+        root_col.collectionType = "Scene Collection"
+        for col in bpy.context.scene.collection.children_recursive:
+            self.ensure_collection(col)
+
+        objects_to_build = set(self.converted.values())
+        objects_to_build.remove(root_commit_object)
+
+        self.apply_relationships(objects_to_build, root_commit_object)
+
+        assert(isinstance(root_commit_object, SCollection))
+        # Kill unused collections
+
+        def should_remove_unuseful_collection(col: SCollection) -> bool: #TODO: this maybe could be optimised
+            elements = col.elements
+            if not elements: return True
+
+            should_remove_this_col = True
+
+            i = 0
+            while i < len(elements):
+                c = elements[i]
+                if not isinstance(c, SCollection): 
+                    # col has objects (c)
+                    should_remove_this_col = False
+                    i += 1
+                    continue
+
+                if should_remove_unuseful_collection(c):
+                    # c is not useful, kill it
+                    del elements[i]
+                else:
+                    # col has a child (c) with objects
+                    should_remove_this_col = False
+                    i += 1
+                    continue
+        
+            return should_remove_this_col
+
+        if should_remove_unuseful_collection(root_commit_object):
+            _report("WARNING: Only empty collections have been converted!") #TODO: consider raising exception here, to halt the send operation

bpy_speckle/clients.py

@@ -1,4 +1,7 @@
 """
 Permanent handle on all user clients
 """
-speckle_clients = []
+from specklepy.api.client import SpeckleClient
+
+
+speckle_clients: list[SpeckleClient] = []

bpy_speckle/convert/__init__.py

@@ -1,28 +0,0 @@
-from bpy_speckle.convert.to_native import convert_to_native
-
-
-def get_speckle_subobjects(attr, scale, name):
-    subobjects = []
-    keys = attr.keys() if isinstance(attr, dict) else attr.get_dynamic_member_names()
-    for key in keys:
-        if isinstance(attr[key], dict):
-            subtype = attr[key].get("type", None)
-            if subtype:
-                name = f"{name}.{key}"
-                subobject = convert_to_native(attr[key], name)
-
-                subobjects.append(subobject)
-                props = attr[key].get("properties", None)
-                if props:
-                    subobjects.extend(get_speckle_subobjects(props, scale, name))
-        elif hasattr(attr[key], "type"):
-            subtype = attr[key].type
-            if subtype:
-                name = "{}.{}".format(name, key)
-                subobject = convert_to_native(attr[key], name)
-
-                subobjects.append(subobject)
-                props = attr[key].get("properties", None)
-                if props:
-                    subobjects.extend(get_speckle_subobjects(props, scale, name))
-    return subobjects

bpy_speckle/convert/constants.py

@@ -0,0 +1,21 @@
+IGNORED_PROPERTY_KEYS = {
+    "id",
+    "elements",
+    "displayMesh",
+    "displayValue",
+    "speckle_type",
+    "parameters",
+    "faces",
+    "colors",
+    "vertices",
+    "renderMaterial",
+    "textureCoordinates",
+    "totalChildrenCount"
+}
+
+DISPLAY_VALUE_PROPERTY_ALIASES = {"displayValue", "@displayValue"}
+ELEMENTS_PROPERTY_ALIASES = {"elements", "@elements"}
+
+OBJECT_NAME_MAX_LENGTH = 62
+SPECKLE_ID_LENGTH = 32
+OBJECT_NAME_SEPERATOR = " -- "

bpy_speckle/convert/to_native.py

@@ -1,11 +1,29 @@
 import math
-from bpy_speckle.functions import get_scale_length, _report
-import mathutils
-import bpy, bmesh, bpy_types
-from specklepy.objects.other import *
-from specklepy.objects.geometry import *
+from typing import Any, Dict, Iterable, List, Optional, Union, Collection, cast
+from bpy_speckle.convert.constants import DISPLAY_VALUE_PROPERTY_ALIASES, ELEMENTS_PROPERTY_ALIASES, OBJECT_NAME_MAX_LENGTH, OBJECT_NAME_SEPERATOR, SPECKLE_ID_LENGTH
+from bpy_speckle.functions import get_default_traversal_func, get_scale_length, _report
+from bpy_speckle.convert.util import ConversionSkippedException
+from mathutils import (
+    Matrix as MMatrix,
+    Vector as MVector,
+    Quaternion as MQuaternion,
+)
+import bpy, bmesh
+from specklepy.objects.other import (
+    Collection as SCollection,
+    Instance,
+    Transform,
+    BlockDefinition,
+)
+from specklepy.objects.base import Base
+from specklepy.objects.geometry import Mesh, Line, Polyline, Curve, Arc, Polycurve, Ellipse, Circle, Plane
+from bpy.types import Object, Collection as BCollection
+
 from .util import (
-    add_blender_material,
+    add_to_heirarchy,
+    get_render_material,
+    get_vertex_color_material,
+    render_material_to_native,
     add_custom_properties,
     add_vertices,
     add_faces,
@@ -13,134 +31,261 @@ from .util import (
     add_uv_coords,
 )
 
-SUPPORTED_CURVES = (Line, Polyline, Curve, Arc, Polycurve)
-
+SUPPORTED_CURVES = (Line, Polyline, Curve, Arc, Polycurve, Ellipse, Circle)
 CAN_CONVERT_TO_NATIVE = (
+
     Mesh,
     *SUPPORTED_CURVES,
-    Transform,
-    BlockDefinition,
-    BlockInstance,
+    Instance,
 )
 
 
-def can_convert_to_native(speckle_object):
-    if type(speckle_object) in CAN_CONVERT_TO_NATIVE:
-        return True
-    if getattr(
-        speckle_object, "displayValue", getattr(speckle_object, "displayMesh", None)
-    ):
-        return True
+def _has_native_convesion(speckle_object: Base) -> bool: 
+    return any(isinstance(speckle_object, t) for t in CAN_CONVERT_TO_NATIVE) or "View" in speckle_object.speckle_type #hack
 
-    _report(f"Could not convert unsupported Speckle object: {speckle_object}")
+def _has_fallback_conversion(speckle_object: Base) -> bool: 
+    return any(getattr(speckle_object, alias, None) for alias in DISPLAY_VALUE_PROPERTY_ALIASES)
+
+def can_convert_to_native(speckle_object: Base) -> bool:
+
+    if(_has_native_convesion(speckle_object) or _has_fallback_conversion(speckle_object)):
+        return True
     return False
 
+def create_new_object(obj_data: Optional[bpy.types.ID], desired_name: str, counter: int = 0) -> bpy.types.Object:
+    """
+    Creates a new blender object with a unique name,
+    if the desired_name is already taken
+    we'll append a number, with the format .xxx to the desired_name to ensure the name is unique.
+    """
+    name = desired_name if counter == 0 else f"{desired_name[:OBJECT_NAME_MAX_LENGTH - 4]}.{counter:03d}"  # format counter as name.xxx, truncate to ensure we don't exceed the object name max length
 
-def convert_to_native(speckle_object, name=None):
-    speckle_type = type(speckle_object)
-    speckle_name = (
-        name
-        or getattr(speckle_object, "name", None)
-        or f"{speckle_object.speckle_type} -- {speckle_object.id}"
-    )
-
-    if speckle_type not in CAN_CONVERT_TO_NATIVE:
-        elements = getattr(speckle_object, "elements", []) or []
-        display = getattr(
-            speckle_object, "displayValue", getattr(speckle_object, "displayMesh", None)
-        )
-        if not elements and not display:
-            _report(f"Could not convert unsupported Speckle object: {speckle_object}")
-            return
-        if isinstance(display, list):
-            elements.extend(display)
-        else:
-            elements.append(display)
-        # TODO: depreciate the parent type
-        # add parent type here so we can use it as a blender custom prop
-        # not making it hidden, so it will get added on send as i think it might be helpful? can reconsider
-        converted = []
-        for item in elements:
-            item.parent_speckle_type = speckle_object.speckle_type
-            blender_object = convert_to_native(item)
-            if isinstance(blender_object, list):
-                converted.extend(blender_object)
-            else:
-                add_custom_properties(speckle_object, blender_object)
-                converted.append(blender_object)
-        return converted
-
-    units = getattr(speckle_object, "units", None)
-    if units:
-        scale = get_scale_length(units) / bpy.context.scene.unit_settings.scale_length
-
-    try:
-        if speckle_type is Mesh:
-            obj_data = mesh_to_native(speckle_object, name=speckle_name, scale=scale)
-        elif speckle_type in SUPPORTED_CURVES:
-            obj_data = icurve_to_native(speckle_object, name=speckle_name, scale=scale)
-        elif speckle_type is Transform:
-            obj_data = transform_to_native(speckle_object, scale=scale)
-        elif speckle_type is BlockDefinition:
-            obj_data = block_def_to_native(speckle_object, scale=scale)
-        elif speckle_type is BlockInstance:
-            obj_data = block_instance_to_native(speckle_object, scale=scale)
-        else:
-            _report(f"Unsupported type {speckle_type}")
-            return None
-    except Exception as ex:  # conversion error
-        _report(f"Error converting {speckle_object} \n{ex}")
-        return None
-
-    if speckle_name in bpy.data.objects.keys():
-        blender_object = bpy.data.objects[speckle_name]
-        blender_object.data = (
-            obj_data.data if isinstance(obj_data, bpy_types.Object) else obj_data
-        )
-        blender_object.matrix_world = (
-            blender_object.matrix_world
-            if speckle_type is BlockInstance
-            else mathutils.Matrix()
-        )
-        if hasattr(obj_data, "materials"):
-            blender_object.data.materials.clear()
-    else:
-        blender_object = (
-            obj_data
-            if isinstance(obj_data, bpy_types.Object)
-            else bpy.data.objects.new(speckle_name, obj_data)
-        )
-
-    blender_object.speckle.object_id = str(speckle_object.id)
-    blender_object.speckle.enabled = True
-    add_custom_properties(speckle_object, blender_object)
-    add_blender_material(speckle_object, blender_object)
+    #TODO: This is very slow, and gets slower the more objects you receive with the same name...
+    # We could use a binary/galloping search, and/or cache the name -> index within a receive.
+    if name in bpy.data.objects.keys():
+        #Object already exists, increment counter and try again!
+        return create_new_object(obj_data, desired_name, counter + 1)
 
+    blender_object = bpy.data.objects.new(name, obj_data)
     return blender_object
 
+convert_instances_as: str #HACK: This is hacky, we need a better way to pass settings down to the converter
+def set_convert_instances_as(value: str):
+    global convert_instances_as
+    convert_instances_as = value
+    
+    #TODO: Check usages handle exceptions
 
-def mesh_to_native(speckle_mesh, name, scale=1.0):
+def convert_to_native(speckle_object: Base) -> Object:
 
-    if name in bpy.data.meshes.keys():
-        blender_mesh = bpy.data.meshes[name]
+    speckle_type = type(speckle_object)
+
+    object_name = _generate_object_name(speckle_object)
+    scale = get_scale_factor(speckle_object)
+
+    converted: Union[bpy.types.ID, bpy.types.Object, None] = None
+    children: list[Object] = []
+
+    # convert elements/breps
+    if not _has_native_convesion(speckle_object):
+        (converted, children) = display_value_to_native(speckle_object, object_name, scale)
+        if not converted and not children:
+            raise Exception(f"Zero geometry converted from displayValues for {speckle_object}")
+
+    # convert supported geometry
+    elif isinstance(speckle_object, Mesh):
+        converted = mesh_to_native(speckle_object, object_name, scale)
+    elif speckle_type in SUPPORTED_CURVES:
+        converted = icurve_to_native(speckle_object, object_name, scale)
+    elif "View" in speckle_object.speckle_type:
+         return view_to_native(speckle_object, object_name, scale)
+    elif isinstance(speckle_object, Instance):
+        if convert_instances_as == "linked_duplicates":
+           converted = instance_to_native_object(speckle_object, scale)
+        elif convert_instances_as == "collection_instance":
+            converted = instance_to_native_collection_instance(speckle_object, scale)
+        else:
+            _report(f"convert_instances_as = '{convert_instances_as}' is not implemented, Instances will be converted as collection instances!")
+            converted = instance_to_native_collection_instance(speckle_object, scale)
     else:
-        blender_mesh = bpy.data.meshes.new(name=name)
+        raise Exception(f"Unsupported type {speckle_type}")
+
+
+    if not isinstance(converted, Object):
+        converted = create_new_object(converted, object_name)
+    
+    converted.speckle.object_id = str(speckle_object.id) # type: ignore
+    converted.speckle.enabled = True # type: ignore
+    add_custom_properties(speckle_object, converted)
+
+    for c in children:
+        c.parent = converted
+
+    return converted
+
+
+
+def display_value_to_native(speckle_object: Base, name: str, scale: float) -> tuple[Optional[bpy.types.Mesh], list[bpy.types.Object]]:
+    return _members_to_native(speckle_object, name, scale, DISPLAY_VALUE_PROPERTY_ALIASES, True)
+
+def elements_to_native(speckle_object: Base, name: str, scale: float) -> list[bpy.types.Object]:
+    (_, elements) = _members_to_native(speckle_object, name, scale, ELEMENTS_PROPERTY_ALIASES, False)
+    return elements
+
+def _members_to_native(speckle_object: Base, name: str, scale: float, members: Iterable[str], combineMeshes: bool) -> tuple[Optional[bpy.types.Mesh], list[bpy.types.Object]]:
+    """
+    Converts a given speckle_object by converting specified members
+
+    if combineMeshes == True
+        Converts mesh members as one mesh
+        Converts non-mesh members as child Objects
+    if combineMeshes == False
+        Converts all members as child objects (first item of the returned tuple will be None)
+    :returns: converted mesh, and any other converted child objects (may happen if members contained non-meshes)
+    """
+    meshes: list[Mesh] = []
+    others: list[Base] = []
+
+    for alias in members:
+        display = getattr(speckle_object, alias, None)
+
+        count = 0
+        MAX_DEPTH = 255 # some large value, to prevent infinite reccursion
+        def seperate(value: Any) -> bool:
+            nonlocal meshes, others, count, MAX_DEPTH
+
+            if combineMeshes and isinstance(value, Mesh):
+                meshes.append(value)
+            elif isinstance(value, Base):
+                others.append(value)
+            elif isinstance(value, list):
+                count += 1
+                if(count > MAX_DEPTH):
+                    return True
+                for x in value:
+                    seperate(x) 
+
+            return False
+
+        did_halt = seperate(display)
+
+        if did_halt:
+            _report(f"Traversal of {speckle_object.speckle_type} {speckle_object.id} halted after traversal depth exceeds MAX_DEPTH={MAX_DEPTH}. Are there circular references object structure?")
+
+
+    children: list[Object] = []
+    mesh = None
+
+    if meshes:
+        mesh = meshes_to_native(speckle_object, meshes, name, scale) #TODO: reconsider passing scale around...
+
+    for item in others:
+        try:
+            blender_object = convert_to_native(item)
+            children.append(blender_object)
+        except Exception as ex:
+            _report(f"Failed to convert display value {item}: {ex}")
+
+    return (mesh, children)
+
+
+
+def view_to_native(speckle_view, name: str, scale: float) -> bpy.types.Object:
+    native_cam: bpy.types.Camera
+    if name in bpy.data.cameras.keys():
+         native_cam = bpy.data.cameras[name]
+    else:
+        native_cam = bpy.data.cameras.new(name=name)
+        native_cam.lens = 18 # 90° horizontal fov
+
+    cam_obj = create_new_object(native_cam, name)
+
+    scale_factor = get_scale_factor(speckle_view, scale)
+    tx = (speckle_view.origin.x * scale_factor)
+    ty = (speckle_view.origin.y * scale_factor)
+    tz = (speckle_view.origin.z * scale_factor) #TODO: do these need to be scaled?
+
+    forward = MVector((speckle_view.forwardDirection.x, speckle_view.forwardDirection.y, speckle_view.forwardDirection.z))
+    up = MVector((speckle_view.upDirection.x, speckle_view.upDirection.y, speckle_view.upDirection.z))
+    right = forward.cross(up).normalized()
+
+    cam_obj.matrix_world = MMatrix((
+        (right.x,  up.x,  -forward.x, tx),
+        (right.y,  up.y,  -forward.y, ty),
+        (right.z,  up.z,  -forward.z, tz),
+        (0,          0,     0,       1 )
+    ))
+    return cam_obj
+
+def mesh_to_native(speckle_mesh: Mesh, name: str, scale: float) -> bpy.types.Mesh:
+    return meshes_to_native(speckle_mesh, [speckle_mesh], name, scale)
+
+
+
+def meshes_to_native(element: Base, meshes: Collection[Mesh], name: str, scale: float) -> bpy.types.Mesh:
+    if name in bpy.data.meshes.keys():
+        return bpy.data.meshes[name]
+    blender_mesh = bpy.data.meshes.new(name=name)
+
+    fallback_material = get_render_material(element)
 
     bm = bmesh.new()
 
-    add_vertices(speckle_mesh, bm, scale)
-    add_faces(speckle_mesh, bm)
-    add_colors(speckle_mesh, bm)
-    add_uv_coords(speckle_mesh, bm)
+    # First pass, add vertex data
+    for mesh in meshes:
+        scale = get_scale_factor(mesh, scale)
+        add_vertices(mesh, bm, scale)
+
+    bm.verts.ensure_lookup_table()
+
+    # Second pass, add face data
+    offset = 0
+    for i, mesh in enumerate(meshes):
+        if not mesh.vertices: continue
+
+        add_faces(mesh, bm, offset, i)
+
+        try:
+            render_material = get_render_material(mesh) or fallback_material
+            if render_material is not None:
+                native_material = render_material_to_native(render_material)
+                blender_mesh.materials.append(native_material)
+            elif mesh.colors:
+                native_material = get_vertex_color_material()
+                blender_mesh.materials.append(native_material)
+        except Exception as ex:
+            _report(f"Failed converting render material for {name}: {ex}")
+
+        offset += len(mesh.vertices) // 3
+
+    bm.faces.ensure_lookup_table()
+    bm.verts.index_update()
+
+    # Third pass, add vertex instance data
+    for mesh in meshes:
+        try:
+            add_colors(mesh, bm)
+        except Exception as ex:
+            _report(f"Skipping converting vertex colors for {name}: {ex}")
+            
+        try:
+            add_uv_coords(mesh, bm)
+        except Exception as ex:
+            _report(f"Skipping converting uv coordinates for {name}: {ex}")
 
-    bmesh.ops.recalc_face_normals(bm, faces=bm.faces)
     bm.to_mesh(blender_mesh)
-    bm.free()
+    bm.free()  
 
     return blender_mesh
 
 
-def line_to_native(speckle_curve, blender_curve, scale):
+"""
+Curves
+"""
+
+def line_to_native(speckle_curve: Line, blender_curve: bpy.types.Curve, scale: float) -> List[bpy.types.Spline]:
+    if not speckle_curve.end: return []
+
     line = blender_curve.splines.new("POLY")
     line.points.add(1)
 
@@ -151,103 +296,95 @@ def line_to_native(speckle_curve, blender_curve, scale):
         1,
     )
 
-    if speckle_curve.end:
+    line.points[1].co = (
+        float(speckle_curve.end.x) * scale,
+        float(speckle_curve.end.y) * scale,
+        float(speckle_curve.end.z) * scale,
+        1,
+    )
 
-        line.points[1].co = (
-            float(speckle_curve.end.x) * scale,
-            float(speckle_curve.end.y) * scale,
-            float(speckle_curve.end.z) * scale,
+    return [line]
+
+
+def polyline_to_native(scurve: Polyline, bcurve: bpy.types.Curve, scale: float) -> List[bpy.types.Spline]:
+    if not (value := scurve.value): return []
+    N = len(value) // 3
+
+    polyline = bcurve.splines.new("POLY")
+
+    if hasattr(scurve, "closed"):
+        polyline.use_cyclic_u = scurve.closed or False
+
+    polyline.points.add(N - 1)
+    for i in range(N):
+        polyline.points[i].co = (
+            float(value[i * 3]) * scale,
+            float(value[i * 3 + 1]) * scale,
+            float(value[i * 3 + 2]) * scale,
             1,
         )
 
-        return line
+    return [polyline]
+    
 
 
-def polyline_to_native(scurve, bcurve, scale):
+def nurbs_to_native(scurve: Curve, bcurve: bpy.types.Curve, scale: float) -> List[bpy.types.Spline]:
+    if not (points := scurve.points): return []
+    if not scurve.degree: raise Exception("curve is missing degree")
+    if not scurve.weights: raise Exception("curve is missing weights")
 
-    # value = find_key_case_insensitive(scurve, "value")
-    value = scurve.value
+    # Closed curves from rhino will have n + degree points. We ignore the extras
+    num_points = len(points) // 3 - scurve.degree if (scurve.closed) else (
+        len(points) // 3)   
+    
+    nurbs = bcurve.splines.new("NURBS")
+    nurbs.use_cyclic_u = scurve.closed or False
+    nurbs.use_endpoint_u = not scurve.periodic
+    
+    nurbs.points.add(num_points - 1)
+    use_weights = len(scurve.weights) >= num_points
+    for i in range(num_points):
+        nurbs.points[i].co = (
+            float(points[i * 3]) * scale,
+            float(points[i * 3 + 1]) * scale,
+            float(points[i * 3 + 2]) * scale,
+            1,
+        )
+        
+        nurbs.points[i].weight = scurve.weights[i] if use_weights else 1
 
-    if value:
-        N = len(value) // 3
+    nurbs.order_u = scurve.degree + 1
 
-        polyline = bcurve.splines.new("POLY")
-
-        if hasattr(scurve, "closed"):
-            polyline.use_cyclic_u = scurve.closed
-
-        # if "closed" in scurve.keys():
-        #    polyline.use_cyclic_u = scurve["closed"]
-
-        polyline.points.add(N - 1)
-        for i in range(N):
-            polyline.points[i].co = (
-                float(value[i * 3]) * scale,
-                float(value[i * 3 + 1]) * scale,
-                float(value[i * 3 + 2]) * scale,
-                1,
-            )
-
-        return polyline
+    return [nurbs]
 
 
-def nurbs_to_native(scurve, bcurve, scale):
-
-    # points = find_key_case_insensitive(scurve, "points")
-    points = scurve.points
-
-    if points:
-        N = len(points) // 3
-
-        nurbs = bcurve.splines.new("NURBS")
-
-        if hasattr(scurve, "closed"):
-            nurbs.use_cyclic_u = scurve.closed != 0
-
-        nurbs.points.add(N - 1)
-        for i in range(N):
-            nurbs.points[i].co = (
-                float(points[i * 3]) * scale,
-                float(points[i * 3 + 1]) * scale,
-                float(points[i * 3 + 2]) * scale,
-                1,
-            )
-
-        if len(scurve.weights) == len(nurbs.points):
-            for i, w in enumerate(scurve.weights):
-                nurbs.points[i].weight = w
-
-        # TODO: anaylize curve knots to decide if use_endpoint_u or use_bezier_u should be enabled
-        # nurbs.use_endpoint_u = True
-        nurbs.order_u = scurve.degree + 1
-
-        return nurbs
-
-
-def arc_to_native(rcurve, bcurve, scale):
-    # TODO: improve Blender representation of arc
+def arc_to_native(rcurve: Arc, bcurve: bpy.types.Curve, scale: float) -> Optional[bpy.types.Spline]:
+    # TODO: improve Blender representation of arc - check autocad test stream
+    if not rcurve.radius: raise Exception("curve is missing radius")
+    if not rcurve.startAngle: raise Exception("curve is missing startAngle")
+    if not rcurve.endAngle: raise Exception("curve is missing endAngle")
 
     plane = rcurve.plane
     if not plane:
-        return
+        return None
 
-    normal = mathutils.Vector([plane.normal.x, plane.normal.y, plane.normal.z])
+    normal = MVector([plane.normal.x, plane.normal.y, plane.normal.z])
 
     radius = rcurve.radius * scale
     startAngle = rcurve.startAngle
     endAngle = rcurve.endAngle
 
-    startQuat = mathutils.Quaternion(normal, startAngle)
-    endQuat = mathutils.Quaternion(normal, endAngle)
+    startQuat = MQuaternion(normal, startAngle) # type: ignore
+    endQuat = MQuaternion(normal, endAngle) # type: ignore
 
     # Get start and end vectors, centre point, angles, etc.
-    r1 = mathutils.Vector([plane.xdir.x, plane.xdir.y, plane.xdir.z])
+    r1 = MVector([plane.xdir.x, plane.xdir.y, plane.xdir.z])
     r1.rotate(startQuat)
 
-    r2 = mathutils.Vector([plane.xdir.x, plane.xdir.y, plane.xdir.z])
+    r2 = MVector([plane.xdir.x, plane.xdir.y, plane.xdir.z])
     r2.rotate(endQuat)
 
-    c = mathutils.Vector([plane.origin.x, plane.origin.y, plane.origin.z]) * scale
+    c = MVector([plane.origin.x, plane.origin.y, plane.origin.z]) * scale
 
     spt = c + r1 * radius
     ept = c + r2 * radius
@@ -263,7 +400,7 @@ def arc_to_native(rcurve, bcurve, scale):
 
     Ndiv = max(int(math.floor(angle / 0.3)), 2)
     step = angle / float(Ndiv)
-    stepQuat = mathutils.Quaternion(normal, step)
+    stepQuat = MQuaternion(normal, step) # type: ignore
     tan = math.tan(step / 2) * radius
 
     arc.points.add(Ndiv + 1)
@@ -286,60 +423,128 @@ def arc_to_native(rcurve, bcurve, scale):
     return arc
 
 
-def polycurve_to_native(scurve, bcurve, scale):
+def polycurve_to_native(scurve: Polycurve, bcurve: bpy.types.Curve, scale: float) -> list[bpy.types.Spline]:
     """
     Convert Polycurve object
     """
-    segments = scurve.segments
+    if not scurve.segments: raise Exception("curve is missing segments")
 
     curves = []
 
-    for seg in segments:
+    for seg in scurve.segments:
         speckle_type = type(seg)
 
         if speckle_type in SUPPORTED_CURVES:
-            curves.append(icurve_to_native_spline(seg, bcurve, scale=scale))
+            curves.append(icurve_to_native_spline(seg, bcurve, scale))
         else:
             _report(f"Unsupported curve type: {speckle_type}")
 
     return curves
+ 
+def ellipse_to_native(ellipse: Union[Ellipse, Circle], bcurve: bpy.types.Curve, units_scale: float) -> List[bpy.types.Spline]:
+    if not ellipse.plane: raise Exception("curve is missing plane")
+
+    radX: float
+    radY: float
+    if isinstance(ellipse, Ellipse):
+        if not ellipse.firstRadius: raise Exception("curve is missing firstRadius")
+        if not ellipse.secondRadius: raise Exception("curve is missing secondRadius")
+
+        radX = ellipse.firstRadius * units_scale
+        radY = ellipse.secondRadius * units_scale
+    else:
+        if not ellipse.radius: raise Exception("curve is missing radius")
+
+        radX = ellipse.radius * units_scale
+        radY = ellipse.radius * units_scale
+
+    
+    D = 0.5522847498307936 # (4/3)*tan(pi/8)
+
+    right_handles = [
+        (+radX,     +radY * D,  0.0),
+        (-radX * D, +radY,      0.0),
+        (-radX,     -radY * D,  0.0),
+        (+radX * D, -radY,      0.0),
+    ]
+
+    left_handles = [
+        (+radX,     -radY * D,  0.0),
+        (+radX * D, +radY,      0.0),
+        (-radX,     +radY * D,  0.0),
+        (-radX * D, -radY,      0.0),
+    ]
+
+    points = [
+        (+radX, 0.0,   0.0),
+        (0.0,   +radY, 0.0),
+        (-radX, 0.0,   0.0),
+        (0.0,   -radY, 0.0),
+    ]
+    transform = plane_to_native_transform(ellipse.plane, units_scale)
+
+    spline = bcurve.splines.new("BEZIER")
+    spline.bezier_points.add(len(points) - 1)
+
+    for i in range(len(points)):
+        spline.bezier_points[i].co = transform @ MVector(points[i]) # type: ignore
+        spline.bezier_points[i].handle_left = transform @ MVector(left_handles[i]) # type: ignore
+        spline.bezier_points[i].handle_right = transform @ MVector(right_handles[i]) # type: ignore
+
+    spline.use_cyclic_u = True
+    
+    #TODO support trims?
+    return [spline]
 
 
-def icurve_to_native_spline(speckle_curve, blender_curve, scale=1.0):
-    curve_type = type(speckle_curve)
-    if curve_type is Line:
-        return line_to_native(speckle_curve, blender_curve, scale)
-    if curve_type is Polyline:
-        return polyline_to_native(speckle_curve, blender_curve, scale)
-    if curve_type is Curve:
-        return nurbs_to_native(speckle_curve, blender_curve, scale)
-    if curve_type is Polycurve:
+def icurve_to_native_spline(speckle_curve: Base, blender_curve: bpy.types.Curve, scale: float) -> List[bpy.types.Spline]:
+    # polycurves
+    if isinstance(speckle_curve, Polycurve):
         return polycurve_to_native(speckle_curve, blender_curve, scale)
-    if curve_type is Arc:
-        return arc_to_native(speckle_curve, blender_curve, scale)
+
+    splines: List[bpy.types.Spline]
+    # single curves
+    if isinstance(speckle_curve, Line):
+        splines = line_to_native(speckle_curve, blender_curve, scale)
+    elif isinstance(speckle_curve, Curve):
+        splines = nurbs_to_native(speckle_curve, blender_curve, scale)
+    elif isinstance(speckle_curve, Polyline):
+        splines = polyline_to_native(speckle_curve, blender_curve, scale)
+    elif isinstance(speckle_curve, Arc):
+        spline = arc_to_native(speckle_curve, blender_curve, scale)
+        splines = [spline] if spline else []
+    elif isinstance(speckle_curve, Ellipse) or isinstance(speckle_curve, Circle):
+        splines = ellipse_to_native(speckle_curve, blender_curve, scale)
+    else:
+        raise TypeError(f"{speckle_curve} is not a supported curve type. Supported types: {SUPPORTED_CURVES}")
+
+    return splines
 
 
-def icurve_to_native(speckle_curve, name=None, scale=1.0):
+def icurve_to_native(speckle_curve: Base, name: str, scale: float) -> bpy.types.Curve:
     curve_type = type(speckle_curve)
     if curve_type not in SUPPORTED_CURVES:
-        _report(f"Unsupported curve type: {curve_type}")
-        return None
-    name = name or f"{curve_type} -- {speckle_curve.id}"
+        raise Exception(f"Unsupported curve type: {curve_type}")
+
     blender_curve = (
         bpy.data.curves[name]
         if name in bpy.data.curves.keys()
         else bpy.data.curves.new(name, type="CURVE")
     )
     blender_curve.dimensions = "3D"
-    blender_curve.resolution_u = 12
+    blender_curve.resolution_u = 12 #TODO: We could maybe decern the resolution from the ployline displayValue
 
     icurve_to_native_spline(speckle_curve, blender_curve, scale)
 
     return blender_curve
 
 
-def transform_to_native(transform: Transform, scale=1.0):
-    mat = mathutils.Matrix(
+"""
+Transforms and Intances
+"""
+
+def transform_to_native(transform: Transform, scale: float) -> MMatrix:
+    mat = MMatrix(
         [
             transform.value[:4],
             transform.value[4:8],
@@ -349,42 +554,234 @@ def transform_to_native(transform: Transform, scale=1.0):
     )
     # scale the translation
     for i in range(3):
-        mat[i][3] *= scale
+        mat[i][3] *= scale # type: ignore
     return mat
 
+def plane_to_native_transform(plane: Plane, fallback_scale:float = 1) -> MMatrix:
+    scale_factor = get_scale_factor(plane, fallback_scale)
+    tx = (plane.origin.x * scale_factor)
+    ty = (plane.origin.y * scale_factor)
+    tz = (plane.origin.z * scale_factor)
 
-def block_def_to_native(definition: BlockDefinition, scale=1.0):
-    native_def = bpy.data.collections.get(definition.name)
+
+    return MMatrix((
+        (plane.xdir.x,  plane.ydir.x,  plane.normal.x, tx),
+        (plane.xdir.y,  plane.ydir.y,  plane.normal.y, ty),
+        (plane.xdir.z,  plane.ydir.z,  plane.normal.z, tz),
+        (0,             0,             0,              1 )
+    ))
+
+
+"""
+Instances / Blocks
+"""
+
+def _get_instance_name(instance: Instance) -> str:
+    if not instance.definition: raise Exception("Instance is missing a definition")
+    name_prefix = (
+        _get_friendly_object_name(instance) 
+        or _get_friendly_object_name(instance.definition) 
+        or _simplified_speckle_type(instance.speckle_type)
+    )
+    return f"{name_prefix}{OBJECT_NAME_SEPERATOR}{instance.id}"
+
+
+def instance_to_native_object(instance: Instance, scale: float) -> Object:
+    """
+    Converts Instance to a unique object with (potentially) shared data (linked duplicate)
+    """
+    if not instance.definition: raise Exception("Instance is missing a definition")
+    if not instance.transform: raise Exception("Instance is missing a transform")
+    definition = instance.definition
+    if not definition.id: raise Exception("Instance is missing a valid definition")
+
+    name = _get_instance_name(instance)
+
+    native_instance: Optional[Object] = None
+    converted_objects: Dict[str, Union[Object, BCollection]] = {}
+    traversal_root: Base = definition
+    
+    if not can_convert_to_native(definition):
+        # Non-convertable (like all blocks, and some revit instances) will not be converted as part of the deep_traversal.
+        # so we explicitly convert them as empties.
+        native_instance = create_new_object(None, name) 
+        native_instance.empty_display_size = 0
+
+        converted_objects["__ROOT"] = native_instance # we create a dummy root to avoid id conflicts, since revit definitions have displayValues, they are convertable
+        traversal_root = Base(elements=definition, id="__ROOT")
+
+    #Convert definition + "elements" on definition
+    _deep_conversion(traversal_root, converted_objects, False)
+
+    if not native_instance:
+        assert(can_convert_to_native(definition))
+
+        if not definition.id in converted_objects:
+            raise Exception("Definition was not converted")
+
+        converted = converted_objects[definition.id]
+
+        if not isinstance(converted, Object):
+            raise Exception("Definition was not converted to an Object")
+        
+        native_instance = converted
+
+    instance_transform = transform_to_native(instance.transform, scale)
+    native_instance.matrix_world = instance_transform
+
+    return native_instance
+
+def instance_to_native_collection_instance(instance: Instance, scale: float) -> bpy.types.Object:
+    """
+    Convert an Instance as a transformed Object with the `instance_collection` property
+    set to be the `instance.Definition` converted as a collection
+
+    The definition collection won't be linked to the current scene
+    Any Elements on the instance object will also be converted (and spacially transformed)
+    """
+    if not instance.definition: raise Exception("Instance is missing a definition")
+    if not instance.transform: raise Exception("Instance is missing a transform")
+
+    name = _get_instance_name(instance)
+
+    # Get/Convert definition collection
+    collection_def = _instance_definition_to_native(instance.definition)
+
+    instance_transform = transform_to_native(instance.transform, scale)
+
+    native_instance = bpy.data.objects.new(name, None)
+
+    #add_custom_properties(instance, native_instance)
+    # hide the instance axes so they don't clutter the viewport
+    native_instance.empty_display_size = 0
+    native_instance.instance_collection = collection_def
+    native_instance.instance_type = "COLLECTION"
+    native_instance.matrix_world = instance_transform
+        
+    return native_instance 
+
+def _instance_definition_to_native(definition: Union[Base, BlockDefinition]) -> bpy.types.Collection:
+    """
+    Converts a geometry carrying Base as a collection (does not link it to the scene)
+    """
+    name = _generate_object_name(definition)
+    native_def = bpy.data.collections.get(name)
     if native_def:
         return native_def
 
-    native_def = bpy.data.collections.new(definition.name)
+    native_def = bpy.data.collections.new(name)
     native_def["applicationId"] = definition.applicationId
-    for geo in definition.geometry:
-        b_obj = convert_to_native(geo)
-        if b_obj:
-            native_def.objects.link(
-                b_obj
-                if isinstance(b_obj, bpy_types.Object)
-                else bpy.data.objects.new(b_obj.name, b_obj)
-            )
+
+    converted_objects = {}
+    converted_objects["__ROOT"] = native_def # we create a dummy root to avoid id conflicts, since revit definitions have displayValues, they are convertable
+    dummyRoot = Base(elements=definition, id="__ROOT")
+
+    _deep_conversion(dummyRoot, converted_objects, True)
 
     return native_def
 
+def _deep_conversion(root: Base, converted_objects: Dict[str, Union[Object, BCollection]], preserve_transform: bool):
+    traversal_func = get_default_traversal_func(can_convert_to_native)
 
-def block_instance_to_native(instance: BlockInstance, scale=1.0):
-    """
-    Convert BlockInstance to native
-    """
-    name = f"{getattr(instance, 'name', None) or instance.blockDefinition.name} -- {instance.id}"
-    native_def = block_def_to_native(instance.blockDefinition, scale)
+    for item in traversal_func.traverse(root):
+        
+        current: Base = item.current
+        if can_convert_to_native(current) or isinstance(current, SCollection):
+            try:
+                if not current or not current.id: raise Exception(f"{current} was an invalid speckle object")
 
-    native_instance = bpy.data.objects.new(name, None)
-    add_custom_properties(instance, native_instance)
-    native_instance["name"] = getattr(instance, 'name', None) or instance.blockDefinition.name
-    # hide the instance axes so they don't clutter the viewport
-    native_instance.empty_display_size = 0
-    native_instance.instance_collection = native_def
-    native_instance.instance_type = "COLLECTION"
-    native_instance.matrix_world = transform_to_native(instance.transform, scale)
-    return native_instance
+                #Convert the object!
+                converted_data_type: str
+                converted: Union[Object, BCollection, None]
+                if isinstance(current, SCollection):
+                    if(current.collectionType == "Scene Collection"): raise ConversionSkippedException()
+                    converted = collection_to_native(current)
+                    converted_data_type = "COLLECTION"
+                else:
+                    converted = convert_to_native(current)
+                    converted_data_type = "COLLECTION_INSTANCE" if converted.instance_collection else str(converted.type)
+                
+                if converted is None:
+                    raise Exception("Conversion returned None")
+                    
+                converted_objects[current.id] = converted
+
+                add_to_heirarchy(converted, item, converted_objects, preserve_transform)
+
+                _report(f"Successfully converted {type(current).__name__} {current.id} as '{converted_data_type}'")
+            except ConversionSkippedException as ex:
+                _report(f"Skipped converting {type(current).__name__} {current.id}: {ex}")
+            except Exception as ex:
+                _report(f"Failed to converted {type(current).__name__} {current.id}: {ex}")
+
+def collection_to_native(collection: SCollection) -> BCollection: 
+    name = collection.name or f"{collection.collectionType} -- {collection.applicationId or collection.id}"  #TODO: consider consolidating name formatting with Rhino
+    ret =  get_or_create_collection(name)
+
+    color = getattr(collection, "colorTag", None)
+    if color:
+        ret.color_tag = color
+
+    return ret
+
+def get_or_create_collection(name: str, clear_collection: bool = True) -> BCollection:
+    existing = cast(BCollection, bpy.data.collections.get(name))
+    if existing:
+        if clear_collection:
+            for obj in existing.objects:
+                existing.objects.unlink(obj)
+        return existing
+    else:
+        new_collection = bpy.data.collections.new(name)
+
+        #NOTE: We want to not render revit "Rooms" collections by default.
+        if name == "Rooms":
+            new_collection.hide_viewport = True
+            new_collection.hide_render = True
+
+        return new_collection
+    
+    
+
+"""
+Object Naming
+"""
+
+def _get_friendly_object_name(speckle_object: Base) -> Optional[str]:
+    return (getattr(speckle_object, "name", None)
+        or getattr(speckle_object, "Name", None)
+        or getattr(speckle_object, "family", None)
+        )
+
+
+# Blender object names must not exceed 62 characters
+# We need to ensure the complete ID is included in the name (to prevent identity collisions)
+# So we if the name is too long, we need to truncate
+
+
+def _truncate_object_name(name: str) -> str:
+
+    MAX_NAME_LENGTH = OBJECT_NAME_MAX_LENGTH - SPECKLE_ID_LENGTH - len(OBJECT_NAME_SEPERATOR)
+
+    return name[:MAX_NAME_LENGTH]
+    
+
+def _simplified_speckle_type(speckle_type: str) -> str:
+    return(speckle_type.rsplit('.')[-1]) #Take only the most specific object type name (without namespace)
+
+def _generate_object_name(speckle_object: Base) -> str:
+    prefix: str
+    name = _get_friendly_object_name(speckle_object)
+    if name:
+        prefix = _truncate_object_name(name)
+    else:
+        prefix = _simplified_speckle_type(speckle_object.speckle_type)
+
+    return f"{prefix}{OBJECT_NAME_SEPERATOR}{speckle_object.id}"
+
+
+def get_scale_factor(speckle_object: Base, fallback: float = 1.0) -> float:
+    scale = fallback
+    if units := getattr(speckle_object, "units", None):
+        scale = get_scale_length(units) / bpy.context.scene.unit_settings.scale_length
+    return scale

bpy_speckle/convert/to_speckle.py

@@ -1,118 +1,184 @@
+from typing import Dict, Iterable, List, Optional, Tuple, Union, cast
 import bpy
-from specklepy.objects.geometry import Mesh, Curve, Interval, Box, Point, Polyline
-from specklepy.objects.other import *
-from bpy_speckle.functions import _report
+from bpy.types import (
+    Depsgraph, 
+    MeshPolygon, 
+    Object, 
+    Curve as NCurve,
+    Mesh as NMesh,
+    Camera as NCamera,
+)
+from deprecated import deprecated
+from mathutils.geometry import interpolate_bezier
+from mathutils import (
+    Matrix as MMatrix,
+    Vector as MVector,
+)
+from specklepy.objects import Base
+from specklepy.objects.other import BlockInstance, BlockDefinition, RenderMaterial, Transform
+from specklepy.objects.geometry import (
+     Mesh, Curve, Interval, Box, Point, Vector, Polyline,
+)
+from bpy_speckle.blender_commit_object_builder import BlenderCommitObjectBuilder
+from bpy_speckle.convert.constants import OBJECT_NAME_SEPERATOR, SPECKLE_ID_LENGTH
 from bpy_speckle.convert.util import (
+    ConversionSkippedException,
     get_blender_custom_properties,
     make_knots,
+    nurb_make_curve,
     to_argb_int,
 )
-
-UNITS = "m"
-
-CAN_CONVERT_TO_SPECKLE = ("MESH", "CURVE", "EMPTY")
+from bpy_speckle.functions import _report
 
 
-def convert_to_speckle(blender_object, scale, desgraph=None):
-    blender_type = blender_object.type
+Units: str = "m" # The desired final units to send
+UnitsScale: float = 1 # The scale factor conversions need to apply to position data to get to the desired units
+
+CAN_CONVERT_TO_SPECKLE = ("MESH", "CURVE", "EMPTY", "CAMERA")
+
+
+def convert_to_speckle(raw_blender_object: Object, units_scale: float, units: str, depsgraph: Optional[Depsgraph]) -> Base:
+    """
+    Converts supported 1 blender objects to 1 speckle object (potentially with children)
+    :param raw_blender_object: the blender object (unevaluated by a Depsgraph) to convert
+    :param units_scale: The scale factor conversions need to apply to position data to get to the desired units
+    :param units: The desired final units to send
+    :param depsgraph: Optional depsgraph if provided will evaluate modifiers on geometry data
+    :return: The Converted blender object
+    """
+    global Units, UnitsScale
+    Units = units
+    UnitsScale = units_scale
+    
+    blender_type = raw_blender_object.type
     if blender_type not in CAN_CONVERT_TO_SPECKLE:
-        return
+        raise ConversionSkippedException(f"Objects of type {blender_type} are not supported")
 
-    speckle_objects = []
-    speckle_material = material_to_speckle(blender_object)
-    if desgraph:
-        blender_object = blender_object.evaluated_get(desgraph)
-    converted = None
+    blender_object = cast(Object, (
+        raw_blender_object.evaluated_get(depsgraph)
+        if depsgraph
+        else raw_blender_object
+        ))
+
+    converted: Optional[Base] = None
     if blender_type == "MESH":
-        converted = mesh_to_speckle(blender_object, blender_object.data, scale)
+        converted = mesh_to_speckle(blender_object, cast(NMesh, blender_object.data))
     elif blender_type == "CURVE":
-        converted = icurve_to_speckle(blender_object, blender_object.data, scale)
+        converted = curve_to_speckle(blender_object, cast(NCurve, blender_object.data))
     elif blender_type == "EMPTY":
-        converted = empty_to_speckle(blender_object, scale)
+        converted = empty_to_speckle(blender_object)
+    elif blender_type == "CAMERA":
+        converted = camera_to_speckle_view(blender_object, cast(NCamera, blender_object.data))
     if not converted:
-        return None
+        raise Exception("Conversion returned None")
 
-    if isinstance(converted, list):
-        speckle_objects.extend([c for c in converted if c != None])
-    else:
-        speckle_objects.append(converted)
-    for so in speckle_objects:
-        so.properties = get_blender_custom_properties(blender_object)
-        so.applicationId = so.properties.pop("applicationId", None)
+    converted["properties"] = get_blender_custom_properties(raw_blender_object) #NOTE: Depsgraph copies don't have custom properties so we use the raw version
 
-        if speckle_material:
-            so["renderMaterial"] = speckle_material
+    # Set object transform #TODO: this could be deprecated once we add proper geometry instancing support
+    if blender_type != "EMPTY": 
+        converted["properties"]["transform"] = transform_to_speckle(
+            blender_object.matrix_world
+        )
 
-        # Set object transform
-        if blender_type != "EMPTY":
-            so.properties["transform"] = transform_to_speckle(
-                blender_object.matrix_world
-            )
+    return converted
 
-    return speckle_objects
+def mesh_to_speckle(blender_object: Object, data: bpy.types.Mesh) -> Base:
+    b = Base()
+    b["name"] = to_speckle_name(blender_object)
+    b["@displayValue"] = mesh_to_speckle_meshes(blender_object, data)
+    return b
+
+def mesh_to_speckle_meshes(blender_object: Object, data: bpy.types.Mesh) -> List[Mesh]:
+
+    # Categorise polygons by material index
+    submesh_data: Dict[int, List[MeshPolygon]] = {}
+
+    for p in data.polygons:
+        if p.material_index not in submesh_data:
+            submesh_data[p.material_index] = []
+        submesh_data[p.material_index].append(p)
+
+    transform = cast(MMatrix, blender_object.matrix_world)
+    scaled_vertices = [tuple(transform @ x.co * UnitsScale) for x in data.vertices] # type: ignore
+
+    # Create Speckle meshes for each material
+    submeshes = []
+    index_counter = 0
+    for i in submesh_data:
+        index_mapping: Dict[int, int] = {}
+
+        #Loop through each polygon, and map indicies to their new index in m_verts
+    
+        mesh_area = 0
+        m_verts: List[float] = []
+        m_faces: List[int] = []
+        m_texcoords: List[float] = []
+        for face in submesh_data[i]:
+            u_indices = face.vertices
+            m_faces.append(len(u_indices))
+
+            mesh_area += face.area
+            for u_index in u_indices:
+                if u_index not in index_mapping:
+                    # Create mapping between index in blender mesh, and new index in speckle submesh
+                    index_mapping[u_index] = len(m_verts) // 3
+                    vert = scaled_vertices[u_index]
+                    m_verts.append(vert[0])
+                    m_verts.append(vert[1])
+                    m_verts.append(vert[2])
+                
+                if data.uv_layers.active:
+                    vt = data.uv_layers.active.data[index_counter]
+                    uv = cast(MVector, vt.uv)
+                    m_texcoords.extend([uv.x, uv.y])
+
+                m_faces.append(index_mapping[u_index])
+                index_counter += 1
+
+        speckle_mesh = Mesh(
+            vertices=m_verts,
+            faces=m_faces,
+            colors=[],
+            textureCoordinates=m_texcoords,
+            units=Units,
+            area = mesh_area,
+            bbox=Box(area=0.0, volume=0.0),
+        )
+        
+        if i < len(data.materials):
+            material = data.materials[i]
+            if material is not None:
+                speckle_mesh["renderMaterial"] = material_to_speckle(material)
+        submeshes.append(speckle_mesh)           
+
+    return submeshes
 
 
-def mesh_to_speckle(blender_object, data, scale=1.0):
-    if data.loop_triangles is None or len(data.loop_triangles) < 1:
-        data.calc_loop_triangles()
-
-    mat = blender_object.matrix_world
-
-    verts = [tuple(mat @ x.co * scale) for x in data.vertices]
-
-    faces = [p.vertices for p in data.polygons]
-    unit_system = bpy.context.scene.unit_settings.system
-
-    sm = Mesh(
-        name=blender_object.name,
-        vertices=list(sum(verts, ())),
-        faces=[],
-        colors=[],
-        textureCoordinates=[],
-        units="m" if unit_system == "METRIC" else "ft",
-        bbox=Box(area=0.0, volume=0.0),
-    )
-
-    if data.uv_layers.active:
-        for vt in data.uv_layers.active.data:
-            sm.textureCoordinates.extend([vt.uv.x, vt.uv.y])
-
-    for f in faces:
-        n = len(f)
-        if n == 3:
-            sm.faces.append(0)
-        elif n == 4:
-            sm.faces.append(1)
-        else:
-            sm.faces.append(n)
-        sm.faces.extend(f)
-
-    return [sm]
-
-
-def bezier_to_speckle(matrix, spline, scale, name=None):
+def bezier_to_speckle(matrix: MMatrix, spline: bpy.types.Spline, name: Optional[str] = None) -> Curve:
     degree = 3
     closed = spline.use_cyclic_u
-
-    points = []
+    points: List[Tuple[MVector]] = []
     for i, bp in enumerate(spline.bezier_points):
         if i > 0:
-            points.append(tuple(matrix @ bp.handle_left * scale))
-        points.append(tuple(matrix @ bp.co * scale))
+            points.append(tuple(matrix @ bp.handle_left * UnitsScale)) # type: ignore
+        points.append(tuple(matrix @ bp.co * UnitsScale)) # type: ignore
         if i < len(spline.bezier_points) - 1:
-            points.append(tuple(matrix @ bp.handle_right * scale))
+            points.append(tuple(matrix @ bp.handle_right * UnitsScale)) # type: ignore
 
     if closed:
         points.extend(
             (
-                tuple(matrix @ spline.bezier_points[-1].handle_right * scale),
-                tuple(matrix @ spline.bezier_points[0].handle_left * scale),
-                tuple(matrix @ spline.bezier_points[0].co * scale),
+                tuple(matrix @ spline.bezier_points[-1].handle_right * UnitsScale), # type: ignore
+                tuple(matrix @ spline.bezier_points[0].handle_left * UnitsScale), # type: ignore
+                tuple(matrix @ spline.bezier_points[0].co * UnitsScale), # type: ignore
             )
         )
-
+    
     num_points = len(points)
 
+    flattend_points = []
+    for row in points: flattend_points.extend(row)
+
     knot_count = num_points + degree - 1
     knots = [0] * knot_count
 
@@ -125,93 +191,187 @@ def bezier_to_speckle(matrix, spline, scale, name=None):
         name=name,
         degree=degree,
         closed=spline.use_cyclic_u,
-        periodic=spline.use_cyclic_u,
-        points=list(sum(points, ())),  # magic (flatten list of tuples)
+        periodic= not spline.use_endpoint_u,
+        points=flattend_points,
         weights=[1] * num_points,
         knots=knots,
-        rational=False,
+        rational=True,
         area=0,
         volume=0,
         length=length,
         domain=domain,
-        units=UNITS,
+        units=Units,
         bbox=Box(area=0.0, volume=0.0),
+        displayValue = bezier_to_speckle_polyline(matrix, spline, length),
     )
 
 
-def nurbs_to_speckle(matrix, spline, scale, name=None):
-    knots = make_knots(spline)
-    points = [tuple(matrix @ pt.co.xyz * scale) for pt in spline.points]
+def nurbs_to_speckle(matrix: MMatrix, spline: bpy.types.Spline, name: Optional[str] = None) -> Curve:
+
     degree = spline.order_u - 1
+    knots = make_knots(spline)
 
     length = spline.calc_length()
     domain = Interval(start=0, end=length, totalChildrenCount=0)
 
+    weights = [pt.weight for pt in spline.points]
+    is_rational = all(w == weights[0] for w in weights)
+
+    points = [tuple(matrix @ pt.co.xyz * UnitsScale) for pt in spline.points] # type: ignore
+
+    flattend_points = []
+    for row in points: flattend_points.extend(row)
+
+    if spline.use_cyclic_u:
+        for i in range(0, degree * 3, 3):
+            # Rhino expects n + degree number of points (for closed curves). So we need to add an extra point for each degree
+            flattend_points.append(flattend_points[i + 0])
+            flattend_points.append(flattend_points[i + 1])
+            flattend_points.append(flattend_points[i + 2])
+        
+        for i in range(0, degree):
+            weights.append(weights[i])
+
     return Curve(
         name=name,
         degree=degree,
         closed=spline.use_cyclic_u,
-        periodic=spline.use_cyclic_u,
-        points=list(sum(points, ())),  # magic (flatten list of tuples)
-        weights=[pt.weight for pt in spline.points],
+        periodic= not spline.use_endpoint_u,
+        points=flattend_points,
+        weights=weights,
         knots=knots,
-        rational=False,
+        rational=is_rational, 
         area=0,
         volume=0,
         length=length,
         domain=domain,
-        units=UNITS,
+        units=Units,
         bbox=Box(area=0.0, volume=0.0),
+        displayValue=nurbs_to_speckle_polyline(matrix, spline, length),
     )
 
+def nurbs_to_speckle_polyline(matrix: MMatrix, spline: bpy.types.Spline, length: Optional[float] = None) -> Polyline:
+    """
+    Samples a nurbs curve with resolution_u creating a polyline
+    """
+    points: List[float] = []
+    sampled_points = nurb_make_curve(spline, spline.resolution_u, 3)
+    for i in range(0, len(sampled_points), 3):
+        scaled_point = cast(Vector, matrix @ MVector((
+        sampled_points[i + 0],
+        sampled_points[i + 1],
+        sampled_points[i + 2])) * UnitsScale)
 
-def poly_to_speckle(matrix, spline, scale, name=None):
-    points = [tuple(matrix @ pt.co.xyz * scale) for pt in spline.points]
+        points.append(scaled_point.x)
+        points.append(scaled_point.y)
+        points.append(scaled_point.z)
+        
+    length = length or spline.calc_length()
+    domain = Interval(start=0, end=length, totalChildrenCount=0)
+    return Polyline(value=points, closed = spline.use_cyclic_u, domain=domain, area=0, len=length)
+
+
+#Inspired by https://blender.stackexchange.com/a/689 (CC BY-SA 3.0) 
+def bezier_to_speckle_polyline(matrix: MMatrix, spline: bpy.types.Spline, length: Optional[float] = None) -> Optional[Polyline]:
+    """
+    Samples a Bézier curve with resolution_u creating a polyline
+    """
+    segments = len(spline.bezier_points)
+    if segments < 2: return None
+
+    R = spline.resolution_u + 1
+
+    points = []
+    if not spline.use_cyclic_u:
+        segments -= 1
+    
+    points: List[float] = []
+    for i in range(segments):
+        inext = (i + 1) % len(spline.bezier_points)
+
+        knot1 = spline.bezier_points[i].co
+        handle1 = spline.bezier_points[i].handle_right
+        handle2 = spline.bezier_points[inext].handle_left
+        knot2 = spline.bezier_points[inext].co
+
+        _points = interpolate_bezier(knot1, handle1, handle2, knot2, R)
+        for p in _points:
+            scaled_point = matrix @ p * UnitsScale
+            points.append(scaled_point.x)
+            points.append(scaled_point.y)
+            points.append(scaled_point.z)
+
+    length = length or spline.calc_length()
+    domain = Interval(start=0, end=length, totalChildrenCount=0)
+    return Polyline(value=points, closed = spline.use_cyclic_u, domain=domain, area=0, len=length)
+
+_QUICK_TEST_NAME_LENGTH = SPECKLE_ID_LENGTH + len(OBJECT_NAME_SEPERATOR)
+
+def to_speckle_name(blender_object: bpy.types.ID) -> str:
+    does_name_contain_id = len(blender_object.name) > _QUICK_TEST_NAME_LENGTH and OBJECT_NAME_SEPERATOR in blender_object.name
+    if does_name_contain_id:
+        return blender_object.name.rsplit(OBJECT_NAME_SEPERATOR, 1)[0]
+    else:
+        return blender_object.name
+
+def poly_to_speckle(matrix: MMatrix, spline: bpy.types.Spline, name: Optional[str] = None) -> Polyline:
+    points = [tuple(matrix @ pt.co.xyz * UnitsScale) for pt in spline.points] # type: ignore
+
+    flattend_points = []
+    for row in points: flattend_points.extend(row)
 
     length = spline.calc_length()
     domain = Interval(start=0, end=length, totalChildrenCount=0)
     return Polyline(
         name=name,
         closed=bool(spline.use_cyclic_u),
-        value=list(sum(points, ())),  # magic (flatten list of tuples)
+        value=list(flattend_points),
         length=length,
         domain=domain,
         bbox=Box(area=0.0, volume=0.0),
         area=0,
-        units=UNITS,
+        units=Units,
     )
 
 
-def icurve_to_speckle(blender_object, data, scale=1.0):
-    UNITS = "m" if bpy.context.scene.unit_settings.system == "METRIC" else "ft"
+def curve_to_speckle(blender_object: Object, data: bpy.types.Curve) -> Base:
+    b = Base()
+    (meshes, curves) = curve_to_speckle_geometry(blender_object, data)
+    if meshes:
+        b["@displayValue"] = meshes
 
-    if blender_object.type != "CURVE":
-        return None
+    b["name"] = to_speckle_name(blender_object)
+    b["@elements"] = curves
+    return b
 
-    blender_object = blender_object.evaluated_get(bpy.context.view_layer.depsgraph)
+def curve_to_speckle_geometry(blender_object: Object, data: bpy.types.Curve) -> Tuple[List[Mesh], List[Base]]:
+    assert(blender_object.type == "CURVE")
 
-    mat = blender_object.matrix_world
+    blender_object = cast(Object, blender_object.evaluated_get(bpy.context.view_layer.depsgraph))
 
-    curves = []
+    matrix = cast(MMatrix, blender_object.matrix_world)
 
+    meshes: List[Mesh] = []
+    curves: List[Base] = []
+
+    #TODO: Could we support this better?
     if data.bevel_mode == "OBJECT" and data.bevel_object != None:
-        mesh = mesh_to_speckle(blender_object, blender_object.to_mesh(), scale)
-        curves.extend(mesh)
+        meshes = mesh_to_speckle_meshes(blender_object, blender_object.to_mesh())
 
     for spline in data.splines:
         if spline.type == "BEZIER":
-            curves.append(bezier_to_speckle(mat, spline, scale, blender_object.name))
+            curves.append(bezier_to_speckle(matrix, spline, to_speckle_name(blender_object)))
 
         elif spline.type == "NURBS":
-            curves.append(nurbs_to_speckle(mat, spline, scale, blender_object.name))
+            curves.append(nurbs_to_speckle(matrix, spline, to_speckle_name(blender_object)))
 
         elif spline.type == "POLY":
-            curves.append(poly_to_speckle(mat, spline, scale, blender_object.name))
+            curves.append(poly_to_speckle(matrix, spline, to_speckle_name(blender_object)))
 
-    return curves
+    return (meshes, curves)
 
-
-def ngons_to_speckle_polylines(blender_object, data, scale=1.0):
+@deprecated
+def ngons_to_speckle_polylines(blender_object: Object, data: bpy.types.Mesh) -> Optional[List[Polyline]]:
     UNITS = "m" if bpy.context.scene.unit_settings.system == "METRIC" else "ft"
 
     if blender_object.type != "MESH":
@@ -224,13 +384,13 @@ def ngons_to_speckle_polylines(blender_object, data, scale=1.0):
     for i, poly in enumerate(data.polygons):
         value = []
         for v in poly.vertices:
-            value.extend(mat @ verts[v].co * scale)
+            value.extend(mat @ verts[v].co * UnitsScale) # type: ignore
 
         domain = Interval(start=0, end=1)
         poly = Polyline(
             name="{}_{}".format(blender_object.name, i),
             closed=True,
-            value=value,  # magic (flatten list of tuples)
+            value=value,
             length=0,
             domain=domain,
             bbox=Box(area=0.0, volume=0.0),
@@ -243,79 +403,130 @@ def ngons_to_speckle_polylines(blender_object, data, scale=1.0):
     return polylines
 
 
-def material_to_speckle(blender_object) -> RenderMaterial:
-    """Create and return a render material from a blender object"""
-    if not getattr(blender_object.data, "materials", None):
-        return
-
-    blender_mat = blender_object.data.materials[0]
-    if not blender_mat:
-        return
-
+def material_to_speckle(blender_mat: bpy.types.Material) -> RenderMaterial:
     speckle_mat = RenderMaterial()
     speckle_mat.name = blender_mat.name
 
-    if blender_mat.use_nodes is True and blender_mat.node_tree.nodes.get(
-        "Principled BSDF"
-    ):
-        inputs = blender_mat.node_tree.nodes["Principled BSDF"].inputs
-        speckle_mat.diffuse = to_argb_int(inputs["Base Color"].default_value)
-        speckle_mat.emissive = to_argb_int(inputs["Emission"].default_value)
-        speckle_mat.roughness = inputs["Roughness"].default_value
-        speckle_mat.metalness = inputs["Metallic"].default_value
-        speckle_mat.opacity = inputs["Alpha"].default_value
+    if blender_mat.use_nodes:
+        if blender_mat.node_tree.nodes.get("Principled BSDF"):
+            inputs = blender_mat.node_tree.nodes["Principled BSDF"].inputs
+            speckle_mat.diffuse = to_argb_int(inputs["Base Color"].default_value) # type: ignore
+            speckle_mat.emissive = to_argb_int(inputs["Emission"].default_value) # type: ignore
+            speckle_mat.roughness = inputs["Roughness"].default_value # type: ignore
+            speckle_mat.metalness = inputs["Metallic"].default_value # type: ignore
+            speckle_mat.opacity = inputs["Alpha"].default_value # type: ignore
+            return speckle_mat
+        elif blender_mat.node_tree.nodes.get("Diffuse BSDF"):
+            inputs = blender_mat.node_tree.nodes["Diffuse BSDF"].inputs
+            speckle_mat.diffuse = to_argb_int(inputs["Color"].default_value) # type: ignore
+            speckle_mat.roughness = inputs["Roughness"].default_value # type: ignore
+            return speckle_mat
+        #TODO: Support more shaders
 
-    else:
-        speckle_mat.diffuse = to_argb_int(blender_mat.diffuse_color)
-        speckle_mat.metalness = blender_mat.metallic
-        speckle_mat.roughness = blender_mat.roughness
+    # fallback to standard material props
+    speckle_mat.diffuse = to_argb_int(blender_mat.diffuse_color) # type: ignore
+    speckle_mat.metalness = blender_mat.metallic
+    speckle_mat.roughness = blender_mat.roughness
 
     return speckle_mat
 
+def camera_to_speckle_view(blender_object: Object, data: NCamera) -> Base:
+    if data.type != 'PERSP':
+        raise Exception(f"Cameras of type {data.type} are not currently supported")
+    
+    matrix = cast(MMatrix, blender_object.matrix_world)
+    up = matrix.col[1].xyz # type: ignore
+    forwards = -matrix.col[2].xyz # type: ignore
+    translation = matrix.translation
 
-def transform_to_speckle(blender_transform, scale=1.0):
-    units = "m" if bpy.context.scene.unit_settings.system == "METRIC" else "ft"
-    value = [y for x in blender_transform for y in x]
+    view = Base.of_type("Objects.BuiltElements.View:Objects.BuiltElements.View3D") #HACK: views are not in specklepy yet!
+    view.name = to_speckle_name(blender_object)
+    view.origin = vector_to_speckle_point(translation)
+    view.upDirection = vector_to_speckle(up)
+    view.forwardDirection = vector_to_speckle(forwards)
+    view.target = vector_to_speckle_point(forwards) #TODO: do these need to be scaled?
+    view.units = Units
+    view.isOrthogonal = False
+    return view
+
+def vector_to_speckle_point(xyz: MVector) -> Point:
+    return Point(
+        x = xyz.x * UnitsScale,
+        y = xyz.y * UnitsScale,
+        z = xyz.z * UnitsScale,
+        units = Units,
+        )
+
+def vector_to_speckle(xyz: MVector) -> Vector:
+    return Vector(
+        x = xyz.x * UnitsScale,
+        y = xyz.y * UnitsScale,
+        z = xyz.z * UnitsScale,
+        units = Units,
+        )
+
+def transform_to_speckle(blender_transform: Union[Iterable[Iterable[float]], MMatrix]) -> Transform:
+    iterable_transform = cast(Iterable[Iterable[float]], blender_transform) #NOTE: Matrix are itterable, even if type hinting says they are not
+    value = [y for x in iterable_transform for y in x]
     # scale the translation
     for i in (3, 7, 11):
-        value[i] *= scale
+        value[i] *= UnitsScale
 
-    return Transform(value=value, units=units)
+    return Transform(value=value, units=Units)
 
 
-def block_def_to_speckle(blender_definition, scale=1.0):
-    geometry = []
+def block_def_to_speckle(blender_definition: bpy.types.Collection) -> BlockDefinition:
+    geometryBuilder = BlenderCommitObjectBuilder()
     for geo in blender_definition.objects:
-        geometry.extend(convert_to_speckle(geo, scale))
+        try:
+            c = convert_to_speckle(geo, UnitsScale, Units, None)
+            geometryBuilder.include_object(c, geo)
+        except ConversionSkippedException as ex:
+            _report(f"Skipped converting '{geo.name_full}' inside collection instance: '{ex}")
+        except Exception as ex:
+            _report(f"Failed to converted '{geo.name_full}' inside collection instance: '{ex}'")
+
+    dummyRoot = Base()
+    geometryBuilder.apply_relationships(geometryBuilder.converted.values(), dummyRoot)
+
     block_def = BlockDefinition(
-        units=UNITS,
-        name=blender_definition.name,
-        geometry=geometry,
-        basePoint=Point(units=UNITS),
+        units=Units,
+        name=to_speckle_name(blender_definition),
+        geometry=dummyRoot["@elements"],
+        basePoint=Point(units=Units),
     )
-    blender_props = get_blender_custom_properties(blender_definition)
-    block_def.applicationId = blender_props.pop("applicationId", None)
+    # blender_props = get_blender_custom_properties(blender_definition)
+    # block_def.applicationId = blender_props.pop("applicationId", None) #TODO: remove?
     return block_def
 
 
-def block_instance_to_speckle(blender_instance, scale=1.0):
+def block_instance_to_speckle(blender_instance: Object) -> BlockInstance:
     return BlockInstance(
         blockDefinition=block_def_to_speckle(
-            blender_instance.instance_collection, scale
+            blender_instance.instance_collection
         ),
         transform=transform_to_speckle(blender_instance.matrix_world),
-        name=blender_instance.name,
-        units=UNITS,
+        name=to_speckle_name(blender_instance),
+        units=Units,
     )
 
 
-def empty_to_speckle(blender_object, scale=1.0):
+def empty_to_speckle(blender_object: Object) -> Union[BlockInstance, Base]:
     # probably an instance collection (block) so let's try it
-    try:
-        geo = blender_object.instance_collection.objects.items()
-        return block_instance_to_speckle(blender_object, scale)
-    except AttributeError as err:
-        _report(
-            f"No instance collection found in empty. Skipping object {blender_object.name}"
-        )
-        return None
+
+    if blender_object.instance_collection and blender_object.instance_type == "COLLECTION":
+        return block_instance_to_speckle(blender_object)
+    else:
+        #raise ConversionSkippedException("Sending non-collection instance empties are not currently supported")
+        wrapper = Base()
+        wrapper["@displayValue"] = matrix_to_speckle_point(cast(MMatrix, blender_object.matrix_world))
+        return wrapper
+        #TODO: we could do a Empty -> Point conversion here. However, the viewer (and likly  other apps) don't support a pont with "elements"
+        #return matrix_to_speckle_point(cast(MMatrix, blender_object.matrix_world))
+
+
+def matrix_to_speckle_point(matrix: MMatrix, units_scale: float = 1.0) -> Point:
+    transformed_pos = cast(MVector, matrix @ MVector((0,0,0)) * units_scale)
+    return Point(x = transformed_pos.x,
+                 y = transformed_pos.y, 
+                 z = transformed_pos.z)

bpy_speckle/convert/util.py

@@ -1,27 +1,21 @@
-from typing import Tuple
-import bpy, struct, idprop
+import math
+from typing import Any, Dict, Optional, Tuple, Union, cast
+from bmesh.types import BMesh
+import bpy, idprop
 
 from specklepy.objects.base import Base
-from specklepy.serialization.base_object_serializer import BaseObjectSerializer
+from specklepy.objects.geometry import Mesh
+from specklepy.objects.other import RenderMaterial
+from bpy_speckle.convert.constants import IGNORED_PROPERTY_KEYS
 from bpy_speckle.functions import _report
+from bpy.types import Material, Object, Collection as BCollection, Node, ShaderNodeVertexColor
 
-IGNORED_PROPERTY_KEYS = {
-    "id",
-    "elements",
-    "displayMesh",
-    "displayValue",
-    "speckle_type",
-    "parameters",
-    "faces",
-    "colors",
-    "vertices",
-    "renderMaterial",
-    "textureCoordinates",
-    "totalChildrenCount"
-}
+from bpy_speckle.specklepy_extras.traversal import TraversalContext
 
+class ConversionSkippedException(Exception):
+    pass
 
-def to_rgba(argb_int: int) -> Tuple[float]:
+def to_rgba(argb_int: int) -> Tuple[float, float, float, float]:
     """Converts the int representation of a colour into a percent RGBA tuple"""
     alpha = ((argb_int >> 24) & 255) / 255
     red = ((argb_int >> 16) & 255) / 255
@@ -31,18 +25,27 @@ def to_rgba(argb_int: int) -> Tuple[float]:
     return (red, green, blue, alpha)
 
 
-def to_argb_int(diffuse_colour) -> int:
+def to_argb_int(rgba_color: list[float]) -> int:
     """Converts an RGBA array to an ARGB integer"""
-    diffuse_colour = diffuse_colour[-1:] + diffuse_colour[:3]
-    diffuse_colour = [int(val * 255) for val in diffuse_colour]
+    argb_color = rgba_color[-1:] + rgba_color[:3]
+    int_color = [int(val * 255) for val in argb_color]
 
-    return int.from_bytes(diffuse_colour, byteorder="big", signed=True)
+    return int.from_bytes(int_color, byteorder="big", signed=True)
 
-def add_custom_properties(speckle_object, blender_object):
+def set_custom_property(key: str, value: Any, blender_object: Object) -> None:
+    try:
+        #Expected c types: float, int, string, float[], int[]
+        blender_object[key] = value
+    except (OverflowError, TypeError) as ex:
+        print(f"Skipping setting property ({key}={value}) on {blender_object.name_full}, Reason: {ex}")
+    except Exception as ex:
+        #TODO: Log this as it's unexpected!!!
+        print(f"Skipping setting property ({key}={value}) on {blender_object.name_full}, Reason: {ex}")
+
+def add_custom_properties(speckle_object: Base, blender_object: Object):
     if blender_object is None:
         return
 
-    serializer = BaseObjectSerializer()
     blender_object["_speckle_type"] = type(speckle_object).__name__
 
     app_id = getattr(speckle_object, "applicationId", None)
@@ -55,39 +58,28 @@ def add_custom_properties(speckle_object, blender_object):
             continue
 
         if isinstance(val, (int, str, float)):
-            blender_object[key] = val
+            set_custom_property(key, val, blender_object)
         elif key == "properties" and isinstance(val, Base):
             val["applicationId"] = None
             add_custom_properties(val, blender_object)
         elif isinstance(val, list):
             items = [item for item in val if not isinstance(item, Base)]
             if items:
-                blender_object[key] = items
+                set_custom_property(key, items, blender_object)
         elif isinstance(val,dict):
             for (k,v) in val.items():
                 if not isinstance(v, Base):
-                    blender_object[k] = v            
+                    set_custom_property(k, v, blender_object)
 
 
-def add_blender_material(speckle_object, blender_object) -> None:
-    """Add material to a blender object if the corresponding speckle object has a render material"""
-    if blender_object.data is None:
-        return
-
-    speckle_mat = getattr(
-        speckle_object,
-        "renderMaterial",
-        getattr(speckle_object, "@renderMaterial", None),
-    )
-    if not speckle_mat:
-        return
-
-    mat_name = getattr(speckle_mat, "name", None) or speckle_mat.__dict__.get("@name")
+def render_material_to_native(speckle_mat: RenderMaterial) -> Material:
+    
+    mat_name = speckle_mat.name
     if not mat_name:
         mat_name = speckle_mat.applicationId or speckle_mat.id or speckle_mat.get_id()
 
     blender_mat = bpy.data.materials.get(mat_name)
-    if not blender_mat:
+    if blender_mat is None:
         blender_mat = bpy.data.materials.new(mat_name)
 
         # for now, we're not updating these materials. as per tom's suggestion, we should have a toggle
@@ -95,19 +87,57 @@ def add_blender_material(speckle_object, blender_object) -> None:
         blender_mat.use_nodes = True
         inputs = blender_mat.node_tree.nodes["Principled BSDF"].inputs
 
-        inputs["Base Color"].default_value = to_rgba(speckle_mat.diffuse)
-        inputs["Emission"].default_value = to_rgba(speckle_mat.emissive)
-        inputs["Roughness"].default_value = speckle_mat.roughness
-        inputs["Metallic"].default_value = speckle_mat.metalness
-        inputs["Alpha"].default_value = speckle_mat.opacity
+        inputs["Base Color"].default_value = to_rgba(speckle_mat.diffuse) # type: ignore
+        inputs["Emission"].default_value = to_rgba(speckle_mat.emissive) # type: ignore
+        inputs["Roughness"].default_value = speckle_mat.roughness # type: ignore
+        inputs["Metallic"].default_value = speckle_mat.metalness # type: ignore
+        inputs["Alpha"].default_value = speckle_mat.opacity # type: ignore
 
-    if speckle_mat.opacity < 1:
+    if speckle_mat.opacity < 1.0:
         blender_mat.blend_method = "BLEND"
 
-    blender_object.data.materials.append(blender_mat)
+    return blender_mat
+
+_vertex_color_material: Optional[Material] = None
+
+def get_vertex_color_material() -> Material:
+    global _vertex_color_material
+    
+    #see https://stackoverflow.com/a/69807985
+    if not _vertex_color_material:
+        _vertex_color_material = bpy.data.materials.new("Vertex Color Material")
+        _vertex_color_material.use_nodes = True
+        nodes = _vertex_color_material.node_tree.nodes
+        principled_bsdf_node = cast(Node, nodes.get("Principled BSDF"))
+    
+        if not "VERTEX_COLOR" in [node.type for node in nodes]:
+            vertex_color_node = cast(ShaderNodeVertexColor, nodes.new(type = "ShaderNodeVertexColor"))
+        else:
+            vertex_color_node = cast(ShaderNodeVertexColor, nodes.get("Vertex Color"))
+        vertex_color_node.layer_name = "Col"
+
+        links = _vertex_color_material.node_tree.links
+        link = links.new(vertex_color_node.outputs[0], principled_bsdf_node.inputs[0])
+
+    return _vertex_color_material
+
+def get_render_material(speckle_object: Base) -> Optional[RenderMaterial]:
+    """Trys to get a RenderMaterial on given speckle_object"""
+
+    speckle_mat = getattr(
+        speckle_object,
+        "renderMaterial",
+        getattr(speckle_object, "@renderMaterial", None),
+    )
+
+    if isinstance(speckle_mat, RenderMaterial):
+        return speckle_mat
+
+    return None
+    
 
 
-def add_vertices(speckle_mesh, blender_mesh, scale=1.0):
+def add_vertices(speckle_mesh: Mesh, blender_mesh: BMesh, scale=1.0):
     sverts = speckle_mesh.vertices
 
     if sverts and len(sverts) > 0:
@@ -120,12 +150,11 @@ def add_vertices(speckle_mesh, blender_mesh, scale=1.0):
                 )
             )
 
-    blender_mesh.verts.ensure_lookup_table()
 
 
-def add_faces(speckle_mesh, blender_mesh, smooth=False):
+def add_faces(speckle_mesh: Mesh, blender_mesh: BMesh, indexOffset: int, materialIndex: int = 0, smooth:bool = True):
     sfaces = speckle_mesh.faces
-
+    
     if sfaces and len(sfaces) > 0:
         i = 0
         while i < len(sfaces):
@@ -136,18 +165,16 @@ def add_faces(speckle_mesh, blender_mesh, smooth=False):
             i += 1
             try:
                 f = blender_mesh.faces.new(
-                    [blender_mesh.verts[int(x)] for x in sfaces[i : i + n]]
+                    [blender_mesh.verts[x + indexOffset] for x in sfaces[i : i + n]] # type: ignore
                 )
+                f.material_index = materialIndex
                 f.smooth = smooth
             except Exception as e:
                 _report(f"Failed to create face for mesh {speckle_mesh.id} \n{e}")
             i += n
 
-        blender_mesh.faces.ensure_lookup_table()
-        blender_mesh.verts.index_update()
 
-
-def add_colors(speckle_mesh, blender_mesh):
+def add_colors(speckle_mesh: Mesh, blender_mesh: BMesh):
 
     scolors = speckle_mesh.colors
 
@@ -156,10 +183,8 @@ def add_colors(speckle_mesh, blender_mesh):
         if len(scolors) > 0:
 
             for i in range(len(scolors)):
-                col = int(scolors[i])
-                (a, r, g, b) = [
-                    int(x) for x in struct.unpack("!BBBB", struct.pack("!i", col))
-                ]
+                argb = int(scolors[i])
+                (a, r, g, b) = argb_split(argb)
                 colors.append(
                     (
                         float(r) / 255.0,
@@ -170,36 +195,43 @@ def add_colors(speckle_mesh, blender_mesh):
                 )
 
         # Make vertex colors
-        if len(scolors) == len(blender_mesh.verts):
+        if len(scolors) == len(blender_mesh.verts): # type: ignore
             color_layer = blender_mesh.loops.layers.color.new("Col")
 
-            for face in blender_mesh.faces:
+            for face in blender_mesh.faces: # type: ignore
                 for loop in face.loops:
                     loop[color_layer] = colors[loop.vert.index]
 
+def argb_split(argb: int) -> Tuple[int, int, int, int]:
+    alpha = (argb >> 24) & 0xFF
+    red = (argb >> 16) & 0xFF
+    green = (argb >> 8) & 0xFF
+    blue = argb & 0xFF
 
-def add_uv_coords(speckle_mesh, blender_mesh):
+    return (alpha, red, green, blue)
+
+def add_uv_coords(speckle_mesh: Mesh, blender_mesh: BMesh):
     s_uvs = speckle_mesh.textureCoordinates
     if not s_uvs:
         return
     try:
         uv = []
 
-        if len(s_uvs) // 2 == len(blender_mesh.verts):
+        if len(s_uvs) // 2 == len(blender_mesh.verts): # type: ignore
             uv.extend(
                 (float(s_uvs[i]), float(s_uvs[i + 1]))
                 for i in range(0, len(s_uvs), 2)
             )
         else:
             _report(
-                f"Failed to match UV coordinates to vert data. Blender mesh verts: {len(blender_mesh.verts)}, Speckle UVs * 2: {len(s_uvs) * 2}"
+                f"Failed to match UV coordinates to vert data. Blender mesh verts: {len(blender_mesh.verts)}, Speckle UVs: {len(s_uvs) // 2}" # type: ignore
             )
             return
 
         # Make UVs
         uv_layer = blender_mesh.loops.layers.uv.verify()
 
-        for f in blender_mesh.faces:
+        for f in blender_mesh.faces: # type: ignore
             for l in f.loops:
                 luv = l[uv_layer]
                 luv.uv = uv[l.vert.index]
@@ -222,7 +254,7 @@ ignored_keys = {
     "_chunkable",
 }
 
-def get_blender_custom_properties(obj, max_depth=1000):
+def get_blender_custom_properties(obj, max_depth: int = 200):
     if max_depth < 0:
         return obj
 
@@ -235,45 +267,41 @@ def get_blender_custom_properties(obj, max_depth=1000):
         }
 
     if isinstance(obj, (list, tuple, idprop.types.IDPropertyArray)):
-        return [get_blender_custom_properties(o, max_depth - 1) for o in obj]
+        return [get_blender_custom_properties(o, max_depth - 1) for o in obj] # type: ignore
     
     return obj
 
-
 """
 Python implementation of Blender's NURBS curve generation for to Speckle conversion
 from: https://blender.stackexchange.com/a/34276
+based on https://projects.blender.org/blender/blender/src/branch/main/source/blender/blenkernel/intern/curve.cc (check old version)
 """
 
-
-def macro_knotsu(nu):
+def macro_knotsu(nu: bpy.types.Spline) -> int:
     return nu.order_u + nu.point_count_u + (nu.order_u - 1 if nu.use_cyclic_u else 0)
 
-
-def macro_segmentsu(nu):
+def macro_segmentsu(nu: bpy.types.Spline) -> int:
     return nu.point_count_u if nu.use_cyclic_u else nu.point_count_u - 1
 
-
-def make_knots(nu):
-    knots = [0.0] * (4 + macro_knotsu(nu))
+def make_knots(nu: bpy.types.Spline) -> list[float]:
+    knots = [0.0] * macro_knotsu(nu)
     flag = nu.use_endpoint_u + (nu.use_bezier_u << 1)
     if nu.use_cyclic_u:
         calc_knots(knots, nu.point_count_u, nu.order_u, 0)
-        makecyclicknots(knots, nu.point_count_u, nu.order_u)
     else:
         calc_knots(knots, nu.point_count_u, nu.order_u, flag)
     return knots
 
 
-def calc_knots(knots, point_count, order, flag):
+def calc_knots(knots: list[float], point_count: int, order: int, flag: int) -> None:
     pts_order = point_count + order
-    if flag == 1:
+    if flag == 1: # CU_NURB_ENDPOINT
         k = 0.0
         for a in range(1, pts_order + 1):
             knots[a - 1] = k
             if a >= order and a <= point_count:
                 k += 1.0
-    elif flag == 2:
+    elif flag == 2: # CU_NURB_BEZIER
         if order == 4:
             k = 0.34
             for a in range(pts_order):
@@ -286,24 +314,176 @@ def calc_knots(knots, point_count, order, flag):
                     k += 0.5
                     knots[a] = math.floor(k)
     else:
-        for a in range(pts_order):
-            knots[a] = a
+        for a in range(1, len(knots) - 1):
+            knots[a] = a - 1
 
+        knots[-1] = knots[-2]
 
-def makecyclicknots(knots, point_count, order):
-    order2 = order - 1
+def basis_nurb(t: float, order: int, point_count: int, knots: list[float], basis: list[float], start: int, end: int) -> Tuple[int, int]:
+    i1 = i2 = 0
+    orderpluspnts = order + point_count
+    opp2 = orderpluspnts - 1
+    
+    # this is for float inaccuracy
+    if t < knots[0]:
+        t = knots[0]
+    elif t > knots[opp2]:
+        t = knots[opp2]
 
-    if order > 2:
-        b = point_count + order2
-        for a in range(1, order2):
-            if knots[b] != knots[b - a]:
+    # this part is order '1'
+    o2 = order + 1
+    for i in range(opp2):
+        if knots[i] != knots[i + 1] and t >= knots[i] and t <= knots[i + 1]:
+            basis[i] = 1.0
+            i1 = i - o2
+            if i1 < 0:
+                i1 = 0
+            i2 = i
+            i += 1
+            while i < opp2:
+                basis[i] = 0.0
+                i += 1
+            break
+
+        else:
+            basis[i] = 0.0
+
+    basis[i] = 0.0 #type: ignore
+
+    # this is order 2, 3, ...
+    for j in range(2, order + 1):
+
+        if i2 + j >= orderpluspnts:
+            i2 = opp2 - j
+
+        for i in range(i1, i2 + 1):
+            if basis[i] != 0.0:
+                d = ((t - knots[i]) * basis[i]) / (knots[i + j - 1] - knots[i])
+            else:
+                d = 0.0
+
+            if basis[i + 1] != 0.0:
+                e = ((knots[i + j] - t) * basis[i + 1]) / (knots[i + j] - knots[i + 1])
+            else:
+                e = 0.0
+
+            basis[i] = d + e
+
+    start = 1000
+    end = 0
+
+    for i in range(i1, i2 + 1):
+        if basis[i] > 0.0:
+            end = i
+            if start == 1000:
+                start = i
+
+    return start, end
+
+def nurb_make_curve(nu: bpy.types.Spline, resolu: int, stride: int = 3) -> list[float]:
+    """"BKE_nurb_makeCurve"""
+    EPS = 1e-6
+    coord_index = istart = iend = 0
+
+    coord_array = [0.0] * (3 * nu.resolution_u * macro_segmentsu(nu))
+    sum_array = [0] * nu.point_count_u
+    basisu = [0.0] * macro_knotsu(nu)
+    knots = make_knots(nu)
+
+    resolu = resolu * macro_segmentsu(nu)
+    ustart = knots[nu.order_u - 1]
+    uend   = knots[nu.point_count_u + nu.order_u - 1] if nu.use_cyclic_u else \
+             knots[nu.point_count_u]
+    ustep  = (uend - ustart) / (resolu - (0 if nu.use_cyclic_u else 1))
+    cycl = nu.order_u - 1 if nu.use_cyclic_u else 0
+
+    u = ustart
+    while resolu:
+        resolu -= 1
+        istart, iend = basis_nurb(u, nu.order_u, nu.point_count_u + cycl, knots, basisu, istart, iend)
+
+        #/* calc sum */
+        sumdiv = 0.0
+        sum_index = 0
+        pt_index = istart - 1
+        for i in range(istart, iend + 1):
+            if i >= nu.point_count_u:
+                pt_index = i - nu.point_count_u
+            else:
+                pt_index += 1
+
+            sum_array[sum_index] = basisu[i] * nu.points[pt_index].co[3] #type: ignore
+            sumdiv += sum_array[sum_index]
+            sum_index += 1
+
+        if (sumdiv != 0.0) and (sumdiv < 1.0 - EPS or sumdiv > 1.0 + EPS):
+            sum_index = 0
+            for i in range(istart, iend + 1):
+                sum_array[sum_index] /= sumdiv #type: ignore
+                sum_index += 1
+
+        coord_array[coord_index: coord_index + 3] = (0.0, 0.0, 0.0)
+
+        sum_index = 0
+        pt_index = istart - 1
+        for i in range(istart, iend + 1):
+            if i >= nu.point_count_u:
+                pt_index = i - nu.point_count_u
+            else:
+                pt_index += 1
+
+            if sum_array[sum_index] != 0.0:
+                for j in range(3):
+                    coord_array[coord_index + j] += sum_array[sum_index] * nu.points[pt_index].co[j]
+            sum_index += 1
+
+        coord_index += stride
+        u += ustep
+
+    return coord_array
+
+def link_object_to_collection_nested(obj: Object, col: BCollection):
+    if obj.name not in col.objects: #type: ignore
+        col.objects.link(obj)
+
+    for child in obj.children: #type: ignore
+        link_object_to_collection_nested(child, col)
+
+def add_to_heirarchy(converted: Union[Object, BCollection], traversalContext : 'TraversalContext', converted_objects: Dict[str, Union[Object, BCollection]], preserve_transform: bool) -> None:
+    nextParent = traversalContext.parent
+
+    # Traverse up the tree to find a direct parent object, and a containing collection
+    parent_collection: Optional[BCollection] = None
+    parent_object: Optional[Object] = None
+
+    while nextParent:
+        if nextParent.current.id in converted_objects:
+            c = converted_objects[nextParent.current.id]
+
+            if isinstance(c, BCollection):
+                parent_collection = c
                 break
+            else: #isinstance(c, Object):
+                parent_object = parent_object or c
 
-            if a == order2:
-                knots[point_count + order - 2] += 1.0
+        nextParent = nextParent.parent
 
-    b = order
-    c = point_count + order + order2
-    for a in range(point_count + order2, c):
-        knots[a] = knots[a - 1] + (knots[b] - knots[b - 1])
-        b -= 1
+    # If no containing collection is found, fall back to the scene collection
+    if not parent_collection:
+        parent_collection = bpy.context.scene.collection
+
+    if isinstance(converted, Object):
+        if parent_object:
+            set_parent(converted, parent_object, preserve_transform)
+        link_object_to_collection_nested(converted, parent_collection)
+    elif converted.name not in parent_collection.children.keys():
+        parent_collection.children.link(converted)
+
+
+def set_parent(child: Object, parent: Object, preserve_transform: bool = False) -> None:
+    if preserve_transform :
+        previous = child.matrix_world.copy() # type: ignore
+        child.parent = parent
+        child.matrix_world = previous
+    else:
+        child.parent = parent

bpy_speckle/functions.py

@@ -1,10 +1,14 @@
-from bpy_speckle.clients import speckle_clients
+from typing import Callable
+from specklepy.objects.base import Base
+from bpy_speckle.convert.constants import ELEMENTS_PROPERTY_ALIASES
+
+from bpy_speckle.specklepy_extras.traversal import GraphTraversal, TraversalRule
 
 """
 Speckle functions
 """
 
-unit_scale = {
+UNIT_SCALE = {
     "meters": 1.0,
     "centimeters": 0.01,
     "millimeters": 0.001,
@@ -33,9 +37,9 @@ def _report(msg):
     print("SpeckleBlender: {}".format(msg))
 
 
-def get_scale_length(units):
-    if units.lower() in unit_scale.keys():
-        return unit_scale[units]
+def get_scale_length(units: str) -> float:
+    if units.lower() in UNIT_SCALE.keys():
+        return UNIT_SCALE[units]
     _report("Units <{}> are not supported.".format(units))
     return 1.0
 
@@ -45,28 +49,28 @@ Client, user, and stream functions
 """
 
 
-def _check_speckle_client_user_stream(scene):
+def get_default_traversal_func(can_convert_to_native: Callable[[Base], bool]) -> GraphTraversal:
     """
-    Verify that there is a valid user and stream
+    Traversal func for traversing a speckle commit object
     """
-    speckle = scene.speckle
-
-    user = (
-        speckle.users[int(speckle.active_user)]
-        if len(speckle.users) > int(speckle.active_user)
-        else None
+    
+    ignore_rule = TraversalRule(
+    [
+        lambda o: "Objects.Structural.Results" in o.speckle_type, #Sadly, this one is nessasary to avoid double conversion...
+        lambda o: "Objects.BuiltElements.Revit.Parameter" in o.speckle_type, #This one is just for traversal performance of revit commits
+    ], 
+    lambda _: [],
     )
 
-    if user is None:
-        print("No users loaded.")
-
-    stream = (
-        user.streams[user.active_stream]
-        if len(user.streams) > user.active_stream
-        else None
+    convertable_rule = TraversalRule(
+    [can_convert_to_native],
+    lambda _: ELEMENTS_PROPERTY_ALIASES,
     )
 
-    if stream is None:
-        print("Account contains no streams.")
 
-    return (user, stream)
+    default_rule = TraversalRule(
+    [lambda _: True],
+    lambda o: o.get_member_names(), #TODO: avoid deprecated members
+    )
+
+    return GraphTraversal([ignore_rule, convertable_rule, default_rule])

bpy_speckle/install_dependencies.py

@@ -1,104 +0,0 @@
-import os, sys, bpy
-import ctypes, sys
-
-import os, sys
-
-
-def modules_path():
-    # set up addons/modules under the user
-    # script path. Here we'll install the
-    # dependencies
-    modulespath = os.path.normpath(
-        os.path.join(bpy.utils.script_path_user(), "addons", "modules")
-    )
-    if not os.path.exists(modulespath):
-        os.makedirs(modulespath)
-
-    # set user modules path at beginning of paths for earlier hit
-    if sys.path[1] != modulespath:
-        sys.path.insert(1, modulespath)
-
-    return modulespath
-
-
-def install_dependencies():
-    import sys
-    import os
-
-    try:
-        try:
-            import pip
-        except:
-            print("Installing pip... "),
-            from subprocess import run as sprun
-
-            res = sprun([bpy.app.binary_path_python, "-m", "ensurepip"])
-
-            if res.returncode == 0:
-                import pip
-            else:
-                raise Exception("Failed to install pip.")
-
-        modulespath = modules_path()
-
-        if not os.path.exists(modulespath):
-            os.makedirs(modulespath)
-
-        print("Installing speckle to {}... ".format(modulespath)),
-        from subprocess import run as sprun
-
-        res = sprun(
-            [
-                bpy.app.binary_path_python,
-                "-m",
-                "pip",
-                "install",
-                "-q",
-                "-t",
-                "{}".format(modulespath),
-                "--no-deps",
-                "pydantic",
-            ]
-        )
-        res = sprun(
-            [
-                bpy.app.binary_path_python,
-                "-m",
-                "pip",
-                "install",
-                "-q",
-                "-t",
-                "{}".format(modulespath),
-                "specklepy",
-            ]
-        )
-
-    except:
-        raise Exception(
-            "Failed to install dependencies. Please make sure you have pip installed."
-        )
-
-
-if __name__ == "__main__":
-    try:
-        import specklepy
-    except:
-        print("Failed to load speckle.")
-        from sys import platform
-
-        if platform == "win32":
-            if ctypes.windll.shell32.IsUserAnAdmin():
-                install_dependencies()
-                import specklepy
-            else:
-                ctypes.windll.shell32.ShellExecuteW(
-                    None, "runas", sys.executable, __file__, None, 1
-                )
-
-        else:
-            print(
-                "Platform {} cannot automatically install dependencies.".format(
-                    platform
-                )
-            )
-            raise

bpy_speckle/installer.py

@@ -0,0 +1,207 @@
+"""
+Provides uniform and consistent path helpers for `specklepy`
+"""
+import os
+import sys
+from pathlib import Path
+from typing import Optional
+from importlib import import_module, invalidate_caches
+
+_user_data_env_var = "SPECKLE_USERDATA_PATH"
+
+
+def _path() -> Optional[Path]:
+    """Read the user data path override setting."""
+    path_override = os.environ.get(_user_data_env_var)
+    if path_override:
+        return Path(path_override)
+    return None
+
+
+_application_name = "Speckle"
+
+
+def override_application_name(application_name: str) -> None:
+    """Override the global Speckle application name."""
+    global _application_name
+    _application_name = application_name
+
+
+def override_application_data_path(path: Optional[str]) -> None:
+    """
+    Override the global Speckle application data path.
+
+    If the value of path is `None` the environment variable gets deleted.
+    """
+    if path:
+        os.environ[_user_data_env_var] = path
+    else:
+        os.environ.pop(_user_data_env_var, None)
+
+
+def _ensure_folder_exists(base_path: Path, folder_name: str) -> Path:
+    path = base_path.joinpath(folder_name)
+    path.mkdir(exist_ok=True, parents=True)
+    return path
+
+
+def user_application_data_path() -> Path:
+    """Get the platform specific user configuration folder path"""
+    path_override = _path()
+    if path_override:
+        return path_override
+
+    try:
+        if sys.platform.startswith("win"):
+            app_data_path = os.getenv("APPDATA")
+            if not app_data_path:
+                raise Exception(
+                    "Cannot get appdata path from environment."
+                )
+            return Path(app_data_path)
+        else:
+            # try getting the standard XDG_DATA_HOME value
+            # as that is used as an override
+            app_data_path = os.getenv("XDG_DATA_HOME")
+            if app_data_path:
+                return Path(app_data_path)
+            else:
+                return _ensure_folder_exists(Path.home(), ".config")
+    except Exception as ex:
+        raise Exception(
+            "Failed to initialize user application data path.", ex
+        )
+
+
+def user_speckle_folder_path() -> Path:
+    """Get the folder where the user's Speckle data should be stored."""
+    return _ensure_folder_exists(user_application_data_path(), _application_name)
+
+
+def user_speckle_connector_installation_path(host_application: str) -> Path:
+    """
+    Gets a connector specific installation folder.
+
+    In this folder we can put our connector installation and all python packages.
+    """
+    return _ensure_folder_exists(
+        _ensure_folder_exists(user_speckle_folder_path(), "connector_installations"),
+        host_application,
+    )
+
+
+
+
+
+
+print("Starting module dependency installation")
+print(sys.executable)
+
+PYTHON_PATH = sys.executable
+
+
+
+def connector_installation_path(host_application: str) -> Path:
+    connector_installation_path = user_speckle_connector_installation_path(host_application)
+    connector_installation_path.mkdir(exist_ok=True, parents=True)
+
+    # set user modules path at beginning of paths for earlier hit
+    if sys.path[0] != connector_installation_path:
+        sys.path.insert(0, str(connector_installation_path))
+
+    print(f"Using connector installation path {connector_installation_path}")
+    return connector_installation_path
+
+
+
+def is_pip_available() -> bool:
+    try:
+        import_module("pip")  # noqa F401
+        return True
+    except ImportError:
+        return False
+
+
+def ensure_pip() -> None:
+    print("Installing pip... ")
+
+    from subprocess import run
+
+    completed_process = run([PYTHON_PATH, "-m", "ensurepip"])
+
+    if completed_process.returncode == 0:
+        print("Successfully installed pip")
+    else:
+        raise Exception(f"Failed to install pip, got {completed_process.returncode} return code")
+
+
+def get_requirements_path() -> Path:
+    # we assume that a requirements.txt exists next to the __init__.py file
+    path = Path(Path(__file__).parent, "requirements.txt")
+    assert path.exists()
+    return path
+
+
+def install_requirements(host_application: str) -> None:
+    # set up addons/modules under the user
+    # script path. Here we'll install the
+    # dependencies
+    path = connector_installation_path(host_application)
+    print(f"Installing Speckle dependencies to {path}")
+
+    from subprocess import run
+
+    completed_process = run(
+        [
+            PYTHON_PATH,
+            "-m",
+            "pip",
+            "install",
+            "-t",
+            str(path),
+            "-r",
+            str(get_requirements_path()),
+        ],
+        capture_output=True,
+        text=True,
+    )
+
+    if completed_process.returncode != 0:
+        m = f"Failed to install dependenices through pip, got {completed_process.returncode} return code"
+        print(m)
+        raise Exception(m)
+
+
+def install_dependencies(host_application: str) -> None:
+    if not is_pip_available():
+        ensure_pip()
+
+    install_requirements(host_application)
+
+
+def _import_dependencies() -> None:
+    import_module("specklepy")
+    # the code above doesn't work for now, it fails on importing graphql-core
+    # despite that, the connector seams to be working as expected
+    # But it would be nice to make this solution work
+    # it would ensure that all dependencies are fully loaded  
+    # requirements = get_requirements_path().read_text()
+    # reqs = [
+    #     req.split(" ; ")[0].split("==")[0].split("[")[0].replace("-", "_")
+    #     for req in requirements.split("\n")
+    #     if req and not req.startswith(" ")
+    # ]
+    # for req in reqs:
+    #     print(req)
+    #     import_module("specklepy")
+
+def ensure_dependencies(host_application: str) -> None:
+    try:
+        install_dependencies(host_application)
+        invalidate_caches()
+        _import_dependencies()
+        print("Successfully found dependencies")
+    except ImportError:
+        raise Exception(f"Cannot automatically ensure Speckle dependencies. Please try restarting the host application {host_application}!")
+
+

bpy_speckle/operators/__init__.py

@@ -1,4 +1,4 @@
-from .users import LoadUsers, LoadUserStreams
+from .users import LoadUsers, LoadUserStreams, ResetUsers
 from .object import (
     UpdateObject,
     ResetObject,
@@ -15,7 +15,6 @@ from .streams import (
     SelectOrphanObjects,
 )
 from .streams import (
-    UpdateGlobal,
     AddStreamFromURL,
     CreateStream,
     CopyStreamId,
@@ -27,6 +26,7 @@ from .misc import OpenSpeckleGuide, OpenSpeckleTutorials, OpenSpeckleForum
 
 operator_classes = [
     LoadUsers,
+    ResetUsers,
     ReceiveStreamObjects,
     SendStreamObjects,
     LoadUserStreams,
@@ -53,7 +53,6 @@ operator_classes.extend(
         ViewStreamDataApi,
         DeleteStream,
         SelectOrphanObjects,
-        UpdateGlobal,
         AddStreamFromURL,
         CreateStream,
         OpenSpeckleGuide,

bpy_speckle/operators/commit.py

@@ -3,13 +3,14 @@ Commit operators
 """
 import bpy
 from bpy.props import BoolProperty
-from bpy_speckle.functions import _check_speckle_client_user_stream
 from bpy_speckle.clients import speckle_clients
+from bpy_speckle.properties.scene import get_speckle
 
 
 class DeleteCommit(bpy.types.Operator):
     """
-    Delete stream
+    Deletes the selected commit from the selected stream.
+    To execute from code, call: `bpy.ops.speckle.delete_commit(are_you_sure=True)`
     """
 
     bl_idname = "speckle.delete_commit"
@@ -28,36 +29,37 @@ class DeleteCommit(bpy.types.Operator):
         col.prop(self, "are_you_sure")
 
     def invoke(self, context, event):
+        speckle = get_speckle(context)
         wm = context.window_manager
-        if len(context.scene.speckle.users) > 0:
+        if len(speckle.users) > 0:
             return wm.invoke_props_dialog(self)
 
         return {"CANCELLED"}
 
     def execute(self, context):
+        try:
+            self.delete_commit(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            print(f"{self.bl_idname}: failed: {ex}")
+            return {"CANCELLED"}
+
+    def delete_commit(self, context: bpy.types.Context) -> None: 
 
         if not self.are_you_sure:
-            return {"CANCELLED"}
+            raise Exception("Cancelled by user")
 
         self.are_you_sure = False
 
-        speckle = context.scene.speckle
+        speckle = get_speckle(context)
 
-        check = _check_speckle_client_user_stream(context.scene)
-        if check is None:
-            return {"CANCELLED"}
+        (_, stream, _, commit) = speckle.validate_commit_selection()
 
-        user, stream = check
-        client = speckle_clients[int(context.scene.speckle.active_user)]
-
-        stream = user.streams[user.active_stream]
-        if len(stream.branches) < 1:
-            return {"CANCELLED"}
-        branch = stream.branches[int(stream.branch)]
-        if len(branch.commits) < 1:
-            return {"CANCELLED"}
-        commit = branch.commits[int(branch.commit)]
+        client = speckle_clients[int(speckle.active_user)]
 
         deleted = client.commit.delete(stream_id=stream.id, commit_id=commit.id)
+        if not deleted:
+            raise Exception("Delete operation failed")
+
+        print(f"{self.bl_idname}: succeeded - commit {commit.id} ({commit.message}) has been deleted from stream {stream.id}")
 
-        return {"FINISHED"}

bpy_speckle/operators/object.py

@@ -4,6 +4,7 @@ Object operators
 
 import bpy
 from bpy.props import BoolProperty, EnumProperty
+from deprecated import deprecated
 from bpy_speckle.convert.to_speckle import (
     convert_to_speckle,
     ngons_to_speckle_polylines,
@@ -28,7 +29,6 @@ class UpdateObject(bpy.types.Operator):
     def execute(self, context):
         user = context.scene.speckle.users[int(context.scene.speckle.active_user)]
         client = speckle_clients[int(context.scene.speckle.active_user)]
-        stream = user.streams[user.active_stream]
 
         active = context.active_object
         _report(active)
@@ -127,7 +127,7 @@ class DeleteObject(bpy.types.Operator):
 
         return {"FINISHED"}
 
-
+@deprecated
 class UploadNgonsAsPolylines(bpy.types.Operator):
     """
     Upload mesh ngon faces as polyline outlines
@@ -151,9 +151,10 @@ class UploadNgonsAsPolylines(bpy.types.Operator):
             client = speckle_clients[int(context.scene.speckle.active_user)]
             stream = user.streams[user.active_stream]
 
-            scale = context.scene.unit_settings.scale_length / get_scale_length(
-                stream.units
-            )
+            # scale = context.scene.unit_settings.scale_length / get_scale_length(
+            #     stream.units
+            # )
+            scale = 1.0
 
             sp = ngons_to_speckle_polylines(active, scale)
 

bpy_speckle/operators/streams.py

@@ -1,234 +1,82 @@
 """
 Stream operators
 """
-from itertools import chain
-from typing import Dict
-import bpy
-from specklepy.api.models import Commit
+from math import radians
+from typing import Callable, Dict, Optional, Union, cast
 import webbrowser
+import bpy
 from bpy.props import (
     StringProperty,
     BoolProperty,
+    EnumProperty,
+)
+from bpy.types import (
+    Context,
+    Object,
+    Collection
+)
+from bpy_speckle.blender_commit_object_builder import BlenderCommitObjectBuilder
+from bpy_speckle.convert.to_native import (
+    can_convert_to_native,
+    collection_to_native,
+    convert_to_native,
+    set_convert_instances_as,
 )
-from bpy_speckle.convert.to_native import can_convert_to_native, convert_to_native
 from bpy_speckle.convert.to_speckle import (
     convert_to_speckle,
-    ngons_to_speckle_polylines,
 )
 from bpy_speckle.functions import (
-    _check_speckle_client_user_stream,
-    get_scale_length,
+    get_default_traversal_func,
     _report,
+    get_scale_length,
 )
-from bpy_speckle.convert import get_speckle_subobjects
 from bpy_speckle.clients import speckle_clients
 from bpy_speckle.operators.users import add_user_stream
-
-from specklepy.api import operations
+from bpy_speckle.properties.scene import SpeckleSceneSettings, SpeckleUserObject, get_speckle
+from bpy_speckle.convert.util import ConversionSkippedException, add_to_heirarchy
+from specklepy.api.models import Commit
+from specklepy.api import operations, host_applications
 from specklepy.api.wrapper import StreamWrapper
 from specklepy.api.resources.stream import Stream
 from specklepy.transports.server import ServerTransport
-from specklepy.objects.geometry import *
+from specklepy.objects import Base
+from specklepy.objects.other import Collection as SCollection
 from specklepy.logging.exceptions import SpeckleException
+from specklepy.logging import metrics
 
+ObjectCallback = Optional[Callable[[bpy.types.Context, Object, Base], Object]]
+ReceiveCompleteCallback = Optional[Callable[[bpy.types.Context, Dict[str, Union[Object, Collection]]], None]]
 
-def get_objects_collections(base) -> Dict:
-    """Create collections based on the dynamic members on a root commit object"""
-    collections = {}
-    for name in base.get_dynamic_member_names():
-        value = base[name]
-        if isinstance(value, list):
-            col = create_collection(name)
-            collections[name] = get_objects_nested_lists(value, col)
-        if isinstance(value, Base):
-            col = create_collection(name)
-            collections[name] = get_objects_collections_recursive(value, col)
-
-    return collections
-
-
-def get_objects_nested_lists(items, parent_col=None) -> List:
-    """For handling the weird nested lists that come from Grasshopper"""
-    objects = []
-
-    if isinstance(items[0], list):
-        items = list(chain.from_iterable(items))
-        objects.extend(get_objects_nested_lists(items, parent_col))
-    else:
-        objects = [
-            get_objects_collections_recursive(item, parent_col)
-            for item in items
-            if isinstance(item, Base)
-        ]
-
-    return objects
-
-
-def get_objects_collections_recursive(base, parent_col=None) -> List:
-    """Recursively create collections based on the dynamic members on nested `Base` objects within the root commit object"""
-    # if it's a convertable (registered) class and not just a plain `Base`, return the object itself
-    if can_convert_to_native(base):
-        return [base]
-
-    # if it's an unknown type, try to drill further down to find convertable objects
-    objects = []
-
-    for name in base.get_dynamic_member_names():
-        value = base[name]
-        if name == "parameters" and "Revit" in base.speckle_type:
-            continue
-        if isinstance(value, list):
-            objects.extend(item for item in value if isinstance(item, Base))
-        if isinstance(value, Base):
-            col = parent_col.children.get(name)
-            if not col:
-                col = create_collection(name)
-                try:
-                    parent_col.children.link(col)
-                except:
-                    _report(
-                        f"Problem linking collection {col.name} to parent {parent_col.name}; skipping"
-                    )
-            objects.append({name: get_objects_collections_recursive(value, col)})
-
-    return objects
-
-
-def bases_to_native(context, collections, scale, stream_id, func=None):
-    for col_name, objects in collections.items():
-        col = bpy.data.collections[col_name]
-        existing = get_existing_collection_objs(col)
-        if isinstance(objects, dict):
-            bases_to_native(context, objects, scale, stream_id)
-        elif isinstance(objects, list):
-            for obj in objects:
-                if isinstance(obj, dict):
-                    bases_to_native(context, obj, scale, stream_id, func)
-                elif isinstance(obj, list):
-                    for item in obj:
-                        if isinstance(item, dict):
-                            bases_to_native(context, item, scale, stream_id, func)
-                        elif isinstance(item, Base):
-                            base_to_native(
-                                context, item, scale, stream_id, col, existing, func
-                            )
-                elif isinstance(obj, Base):
-                    base_to_native(context, obj, scale, stream_id, col, existing, func)
-
-                else:
-                    _report(
-                        f"Something went wrong when receiving collection: {col_name}"
-                    )
-
-            bpy.context.view_layer.update()
-
-            if context.area:
-                context.area.tag_redraw()
-
-
-def base_to_native(context, base, scale, stream_id, col, existing, func=None):
-    new_objects = convert_to_native(base)
-    if not isinstance(new_objects, list):
-        new_objects = [new_objects]
-
-    if hasattr(base, "properties") and base.properties is not None:
-        new_objects.extend(get_speckle_subobjects(base.properties, scale, base.id))
-    elif isinstance(base, dict) and "properties" in base.keys():
-        new_objects.extend(
-            get_speckle_subobjects(base["properties"], scale, base["id"])
-        )
-
+def get_receive_funcs(speckle: SpeckleSceneSettings) -> tuple[ObjectCallback, ReceiveCompleteCallback]:
     """
-    Set object Speckle settings
+    Fetches the injected callback functions from user specified "Receive Script"
     """
-    for new_object in new_objects:
-        if new_object is None:
-            continue
 
-        """
-        Run injected function
-        """
-        if func:
-            new_object = func(context.scene, new_object)
+    objectCallback: ObjectCallback = None
+    receiveCompleteCallback: ReceiveCompleteCallback = None
+    
+    if speckle.receive_script in bpy.data.texts:
+        mod = bpy.data.texts[speckle.receive_script].as_module()
+        if hasattr(mod, "execute_for_each"):
+            objectCallback = mod.execute_for_each #type: ignore
+        elif hasattr(mod, "execute"): 
+            objectCallback = lambda c, o, _ : mod.execute(c.scene, o) #type: ignore
 
-        if (
-            new_object is None
-        ):  # Make sure that the injected function returned an object
-            _report(f"Script '{func.__module__}' returned None.")
-            continue
+        if hasattr(mod, "execute_for_all"):
+            receiveCompleteCallback = mod.execute_for_all #type: ignore
 
-        new_object.speckle.stream_id = stream_id
-        new_object.speckle.send_or_receive = "receive"
+    return (objectCallback, receiveCompleteCallback)
 
-        if new_object.speckle.object_id in existing.keys():
-            name = existing[new_object.speckle.object_id].name
-            existing[new_object.speckle.object_id].name = f"{name}__deleted"
-            new_object.name = name
-            col.objects.unlink(existing[new_object.speckle.object_id])
-
-        if new_object.name not in col.objects:
-            col.objects.link(new_object)
-
-
-def create_collection(name, clear_collection=True):
-    if name in bpy.data.collections:
-        col = bpy.data.collections[name]
-        if clear_collection:
-            for obj in col.objects:
-                col.objects.unlink(obj)
-    else:
-        col = bpy.data.collections.new(name)
-
-    return col
-
-
-def create_child_collections(parent_col, children_names):
-    for name in children_names:
-        col = create_collection(name)
-        parent_col.children.link(col)
-
-
-def get_existing_collection_objs(col):
-    return {
-        obj.speckle.object_id: obj for obj in col.objects if obj.speckle.object_id != ""
-    }
-
-
-def get_collection_parents(collection, names):
-    for parent in bpy.data.collections:
-        if collection.name in parent.children.keys():
-            # TODO: this should be rethought to make it clear when this is an IFC delim so we know to replace it
-            # with `/` again on receive
-            names.append(parent.name.replace("/", "::").replace(".", "::"))
-            get_collection_parents(parent, names)
-
-
-def get_collection_hierarchy(collection):
-    if not collection:
-        return []
-    names = [collection.name.replace("/", "::").replace(".", "::")]
-    get_collection_parents(collection, names)
-
-    return names
-
-
-def create_nested_hierarchy(base, hierarchy, objects):
-    child = base
-
-    while hierarchy:
-        name = hierarchy.pop()
-        if not hasattr(child, name):
-            child[name] = Base()
-            child.add_detachable_attrs({name})
-        child = child[name]
-
-    # TODO: what do we call this attribute?
-    if not hasattr(child, "@objects"):
-        child["@objects"] = []
-    child["@objects"].extend(objects)
-
-    return base
+#RECEIVE_MODES = [#TODO: modes
+#    ("create", "Create", "Add new geometry, without removing any existing objects"),
+#    ("replace", "Replace", "Replace objects from previous receive operations from the same stream"),
+#    #("update","Update", "") #TODO: update mode!
+#]
 
+INSTANCES_SETTINGS = [
+    ("collection_instance", "Collection Instace", "Receive Instances as Collection Instances"),
+    ("linked_duplicates", "Linked Duplicates", "Receive Instances as Linked Duplicates"),
+]
 
 class ReceiveStreamObjects(bpy.types.Operator):
     """
@@ -240,87 +88,160 @@ class ReceiveStreamObjects(bpy.types.Operator):
     bl_options = {"REGISTER", "UNDO"}
     bl_description = "Receive objects from active stream"
 
-    def execute(self, context):
+    
+    clean_meshes: BoolProperty(name="Clean Meshes", default=False)
+
+    #receive_mode: EnumProperty(items=RECEIVE_MODES, name="Receive Type", default="replace", description="The behaviour of the recieve operation")
+    receive_instances_as: EnumProperty(items=INSTANCES_SETTINGS, name="Receive Instances As", default="collection_instance", description="How to receive speckle Instances")
+    
+
+    def draw(self, context):
+        layout = self.layout
+        col = layout.column()
+        col.prop(self, "clean_meshes")
+        #col.prop(self, "receive_mode")
+        col.prop(self, "receive_instances_as")
+
+    def invoke(self, context, event):
+        return context.window_manager.invoke_props_dialog(self)
+
+    @staticmethod
+    def clean_converted_meshes(context: bpy.types.Context, convertedObjects: dict[str, Object]):
+        
+        bpy.ops.object.select_all(action='DESELECT')
+
+        active = None
+        for obj in convertedObjects.values():
+            if obj.type != 'MESH':
+                continue
+
+            obj.select_set(True, view_layer=context.scene.view_layers[0])
+            active = obj
+        
+
+        if active == None:
+            return
+        context.view_layer.objects.active = active
+
+        bpy.ops.object.mode_set(mode='EDIT')
+        bpy.ops.mesh.select_all(action='SELECT')
+        bpy.ops.mesh.dissolve_limited(angle_limit=radians(0.1))
+
+        # Reset state to previous (not quite sure if this is 100% necessary)
+        bpy.ops.object.mode_set(mode='OBJECT')
+        bpy.ops.object.select_all(action='DESELECT')
         bpy.context.view_layer.objects.active = None
 
-        check = _check_speckle_client_user_stream(context.scene)
-        if check is None:
+    def execute(self, context):
+        try:
+            self.receive(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"Failed to receive objects: {type(ex)} {ex}")
             return {"CANCELLED"}
 
-        user, bstream = check
+    def receive(self, context: Context) -> None:
+        bpy.context.view_layer.objects.active = None
 
-        client = speckle_clients[int(context.scene.speckle.active_user)]
+        speckle = get_speckle(context)
+        
+        (user, stream, branch, commit) = speckle.validate_commit_selection()
 
-        stream = client.stream.get(id=bstream.id, branch_limit=20)
-        if stream.branches.totalCount < 1:
-            return {"CANCELLED"}
-
-        if not stream.branches:
-            return {"CANCELLED"}
-
-        branch = stream.branches.items[int(bstream.branch)]
-
-        bbranch = bstream.branches[int(bstream.branch)]
-
-        if branch.commits.totalCount < 1:
-            _report("No commits found. Probably an empty stream.")
-            return {"CANCELLED"}
-
-        commit = branch.commits.items[int(bbranch.commit)]
+        client = speckle_clients[int(speckle.active_user)]
 
         transport = ServerTransport(stream.id, client)
-        stream_data = operations.receive(commit.referencedObject, transport)
+
+        metrics.track(
+            metrics.RECEIVE,
+            getattr(transport, "account", None), 
+            custom_props={
+                "sourceHostApp": host_applications.get_host_app_from_string(commit.source_application).slug,
+                "sourceHostAppVersion": commit.source_application,
+                "isMultiplayer": commit.author_id != user.id,
+            },
+        )
+
+        # Fetch commit data
+        commit_object = operations._untracked_receive(commit.referenced_object, transport)
         client.commit.received(
-            bstream.id,
+            stream.id,
             commit.id,
             source_application="blender",
             message="received commit from Speckle Blender",
         )
 
-        """
-        Create or get Collection for stream objects
-        """
-        collections = get_objects_collections(stream_data)
+        # Convert received data
+        context.window_manager.progress_begin(0, commit_object.totalChildrenCount or 1)
 
-        if not collections:
-            return {"CANCELLED"}
+        set_convert_instances_as(self.receive_instances_as) #HACK: we need a better way to pass settings down to the converter
 
-        name = "{} [ {} @ {} ]".format(stream.name, branch.name, commit.id)
-        col = create_collection(name)
-        col.speckle.stream_id = stream.id
-        col.speckle.name = stream.name
-        col.speckle.units = stream_data.units
-        if col.name not in bpy.context.scene.collection.children:
-            bpy.context.scene.collection.children.link(col)
+        traversalFunc = get_default_traversal_func(can_convert_to_native)
+        converted_objects: Dict[str, Union[Object, Collection]] = {}
+        converted_count: int = 0
+        (object_converted_callback, on_complete_callback) = get_receive_funcs(speckle)
 
-        for child_col in collections.keys():
-            try:
-                col.children.link(bpy.data.collections[child_col])
-            except:
-                pass
-        """
-        Set conversion scale from stream units
-        """
-        scale = (
-            get_scale_length(stream_data.units)
-            / context.scene.unit_settings.scale_length
-        )
+        # older commits will have a non-collection root object
+        # for the sake of consistant behaviour, we will wrap any non-collection commit objects in a collection
+        if not isinstance(commit_object, SCollection):
+            dummy_commit_object = SCollection()
+            dummy_commit_object.elements = [commit_object]
+            dummy_commit_object.name = getattr(commit_object, "name", None)
+            dummy_commit_object.id = dummy_commit_object.get_id()
+            commit_object = dummy_commit_object
 
-        """
-        Get script from text editor for injection
-        """
-        func = None
-        if context.scene.speckle.receive_script in bpy.data.texts:
-            mod = bpy.data.texts[context.scene.speckle.receive_script].as_module()
-            if hasattr(mod, "execute"):
-                func = mod.execute
+        # ensure commit object has a name if not already
+        if not commit_object.name:
+            commit_object.name = "{} [ {} @ {} ]".format(stream.name, branch.name, commit.id) # Matches Rhino "Create" naming
 
-        """
-        Iterate through retrieved resources
-        """
-        bases_to_native(context, collections, scale, stream.id, func)
+        for item in traversalFunc.traverse(commit_object):
+            
+            current: Base = item.current
+
+            if can_convert_to_native(current) or isinstance(current, SCollection):
+                try:
+                    if not current or not current.id: raise Exception(f"{current} was an invalid speckle object")
+
+                    #Convert the object!
+                    converted_data_type: str
+                    converted: Union[Object, Collection, None]
+                    if isinstance(current, SCollection):
+                        if(current.collectionType == "Scene Collection"): raise ConversionSkippedException()
+                        converted = collection_to_native(current)
+                        converted_data_type = "COLLECTION"
+                    else:
+                        converted = convert_to_native(current)
+                        converted_data_type = "COLLECTION_INSTANCE" if converted.instance_collection else str(converted.type)
+                        
+                        #Run the user specified callback function (AKA receive script)
+                        if object_converted_callback:
+                            converted = object_converted_callback(context, converted, current)
+                    
+                    if converted is None:
+                        raise Exception("Conversion returned None")
+                        
+                    converted_objects[current.id] = converted
+
+                    add_to_heirarchy(converted, item, converted_objects, True)
+
+                    _report(f"Successfully converted {type(current).__name__} {current.id} as '{converted_data_type}'")
+                except ConversionSkippedException as ex:
+                    _report(f"Skipped converting {type(current).__name__} {current.id}: {ex}")
+                except Exception as ex:
+                    _report(f"Failed to converted {type(current).__name__} {current.id}: {ex}")
+
+            converted_count += 1
+            context.window_manager.progress_update(converted_count) #NOTE: We don't expect to ever reach 100% since not every object will be traversed
+
+
+        context.window_manager.progress_end()
+
+        if self.clean_meshes:
+            objects = {k: v for k, v in converted_objects.items() if isinstance(v, Object)}
+            self.clean_converted_meshes(context, objects)
+
+        if on_complete_callback:
+            on_complete_callback(context, converted_objects)
 
-        return {"FINISHED"}
 
 
 class SendStreamObjects(bpy.types.Operator):
@@ -347,119 +268,110 @@ class SendStreamObjects(bpy.types.Operator):
 
     def invoke(self, context, event):
         wm = context.window_manager
-        if len(context.scene.speckle.users) > 0:
-            N = len(context.selected_objects)
-            if N == 1:
-                self.commit_message = "Pushed {} element from Blender.".format(N)
-            else:
-                self.commit_message = "Pushed {} elements from Blender.".format(N)
-            return wm.invoke_props_dialog(self)
+        if len(context.scene.speckle.users) <= 0: return {"CANCELLED"}
+
+        N = len(context.selected_objects)
+        if N == 1:
+            self.commit_message = f"Pushed {N} element from Blender."
+        else:
+            self.commit_message = f"Pushed {N} elements from Blender."
+        return wm.invoke_props_dialog(self)
 
-        return {"CANCELLED"}
 
     def execute(self, context):
+        try:
+            self.send(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"Send failed: {ex}")
+            return {"CANCELLED"} 
+
+    def send(self, context: Context) -> None:
 
         selected = context.selected_objects
-
         if len(selected) < 1:
-            return {"CANCELLED"}
+            raise Exception("No objects are selected, sending canceled")
 
-        check = _check_speckle_client_user_stream(context.scene)
-        if check is None:
-            return {"CANCELLED"}
+        speckle = get_speckle(context)
+        (user, stream, branch) = speckle.validate_branch_selection()
 
-        user, bstream = check
-        stream = user.streams[user.active_stream]
-        branch = stream.branches[int(stream.branch)]
+        client = speckle_clients[int(speckle.active_user)]
 
-        client = speckle_clients[int(context.scene.speckle.active_user)]
+        units = "m" if bpy.context.scene.unit_settings.system == "METRIC" else "ft"
 
-        scale = context.scene.unit_settings.scale_length / get_scale_length(
-            stream.units.lower()
-        )
+        units_scale = context.scene.unit_settings.scale_length / get_scale_length(units)
 
-        """
-        Get script from text editor for injection
-        """
+        # Get script from text editor for injection
         func = None
-        if context.scene.speckle.send_script in bpy.data.texts:
-            mod = bpy.data.texts[context.scene.speckle.send_script].as_module()
+        if speckle.send_script in bpy.data.texts:
+            mod = bpy.data.texts[speckle.send_script].as_module()
             if hasattr(mod, "execute"):
-                func = mod.execute
+                func = mod.execute #type: ignore
 
-        export = {}
+        num_converted = 0
+        context.window_manager.progress_begin(0, max(len(selected), 1))
 
+        depsgraph = bpy.context.evaluated_depsgraph_get() if self.apply_modifiers else None
+
+        commit_builder = BlenderCommitObjectBuilder()
         for obj in selected:
+            try:
+                # Run injected function
+                new_object = obj
+                if func:
+                    new_object = func(context.scene, obj)
 
-            # if obj.type != 'MESH':
-            #     continue
+                    if (new_object is None):
+                        raise ConversionSkippedException(f"Script '{func.__module__}' returned None.")
 
-            new_object = obj
-
-            """
-            Run injected function
-            """
-            if func:
-                new_object = func(context.scene, obj)
-
-                if (
-                    new_object is None
-                ):  # Make sure that the injected function returned an object
-                    new_obj = obj
-                    _report("Script '{}' returned None.".format(func.__module__))
-                    continue
-
-            _report("Converting {}".format(obj.name))
-
-            ngons = obj.get("speckle_ngons_as_polylines", False)
-
-            if ngons:
-                converted = ngons_to_speckle_polylines(obj, scale)
-            else:
                 converted = convert_to_speckle(
                     obj,
-                    scale,
-                    bpy.context.evaluated_depsgraph_get()
-                    if self.apply_modifiers
-                    else None,
+                    units_scale,
+                    units,
+                    depsgraph
                 )
 
-            if not converted:
-                continue
+                if not converted:
+                    raise Exception("Converter returned None")
 
-            collection_name = obj.users_collection[0].name
-            if not export.get(collection_name):
-                export[collection_name] = []
+                commit_builder.include_object(converted, obj)
 
-            export[collection_name].extend(converted)
+                _report(f"Successfully converted '{obj.name_full}' as '{converted.speckle_type}'")
+            except ConversionSkippedException as ex:
+                _report(f"Skipped converting '{obj.name_full}': '{ex}'")
+            except Exception as ex:
+                _report(f"Failed to converted '{obj.name_full}': '{ex}'")
+                
+            num_converted += 1
+            context.window_manager.progress_update(num_converted)
 
-        base = Base()
-        for name, objects in export.items():
-            collection = bpy.data.collections.get(name)
-            hierarchy = get_collection_hierarchy(collection)
-            create_nested_hierarchy(base, hierarchy, objects)
+        context.window_manager.progress_end()
 
+        commit_object = commit_builder.ensure_collection(context.scene.collection)
+        commit_builder.build_commit_object(commit_object)
+
+        _report(f"Sending data to {stream.name}")
         transport = ServerTransport(stream.id, client)
-
-        obj_id = operations.send(
-            base,
+        OBJECT_ID = operations.send(
+            commit_object,
             [transport],
         )
-        client.commit.create(
+
+        COMMIT_ID = client.commit.create(
             stream.id,
-            obj_id,
+            OBJECT_ID,
             branch.name,
             message=self.commit_message,
             source_application="blender",
         )
+        _report(f"Commit Created {user.server_url}/streams/{stream.id}/commits/{COMMIT_ID}")
 
-        bpy.ops.speckle.load_user_streams()
-
+        bpy.ops.speckle.load_user_streams() # refresh loaded commits
         context.view_layer.update()
 
         if context.area:
             context.area.tag_redraw()
-        return {"FINISHED"}
+
 
 
 class ViewStreamDataApi(bpy.types.Operator):
@@ -469,15 +381,20 @@ class ViewStreamDataApi(bpy.types.Operator):
     bl_description = "View the stream in the web browser"
 
     def execute(self, context):
+        try:
+            self.view_stream_data_api(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
 
-        if len(context.scene.speckle.users) > 0:
-            user = context.scene.speckle.users[int(context.scene.speckle.active_user)]
-            if len(user.streams) > 0:
-                stream = user.streams[user.active_stream]
+    def view_stream_data_api(self, context: Context) -> None:
+        speckle = get_speckle(context)
 
-                webbrowser.open("%s/streams/%s" % (user.server_url, stream.id), new=2)
-                return {"FINISHED"}
-        return {"CANCELLED"}
+        (user, stream) = speckle.validate_stream_selection()
+        
+        if not webbrowser.open("%s/streams/%s" % (user.server_url, stream.id), new=2):
+            raise Exception("Failed to open stream in browser")
 
 
 class AddStreamFromURL(bpy.types.Operator):
@@ -500,13 +417,22 @@ class AddStreamFromURL(bpy.types.Operator):
 
     def invoke(self, context, event):
         wm = context.window_manager
-        if len(context.scene.speckle.users) > 0:
+        speckle = get_speckle(context)
+        if len(speckle.users) > 0:
             return wm.invoke_props_dialog(self)
 
         return {"CANCELLED"}
 
     def execute(self, context):
-        speckle = context.scene.speckle
+        try:
+            self.add_stream_from_url(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
+        
+    def add_stream_from_url(self, context: Context) -> None:
+        speckle = get_speckle(context)
 
         wrapper = StreamWrapper(self.stream_url)
         user_index = next(
@@ -514,9 +440,10 @@ class AddStreamFromURL(bpy.types.Operator):
             None,
         )
         if user_index is None:
-            return {"CANCELLED"}
+            raise Exception("Unable to find user stream server")
+        
         speckle.active_user = str(user_index)
-        user = speckle.users[user_index]
+        user = cast(SpeckleUserObject, speckle.users[user_index])
 
         client = speckle_clients[user_index]
         stream = client.stream.get(wrapper.stream_id, branch_limit=20)
@@ -555,8 +482,6 @@ class AddStreamFromURL(bpy.types.Operator):
         if context.area:
             context.area.tag_redraw()
 
-        return {"FINISHED"}
-
 
 class CreateStream(bpy.types.Operator):
     """
@@ -581,23 +506,31 @@ class CreateStream(bpy.types.Operator):
 
     def invoke(self, context, event):
         wm = context.window_manager
-        if len(context.scene.speckle.users) > 0:
+        speckle = get_speckle(context)
+        if len(speckle.users) > 0:
             return wm.invoke_props_dialog(self)
 
         return {"CANCELLED"}
 
     def execute(self, context):
+        try:
+            self.create_stream(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
+        
+    def create_stream(self, context: Context) -> None:
+        speckle = get_speckle(context)
 
-        check = _check_speckle_client_user_stream(context.scene)
-        if check is None:
-            return {"CANCELLED"}
+        user = speckle.validate_user_selection()
 
-        user, bstream = check
-
-        client = speckle_clients[int(context.scene.speckle.active_user)]
+        client = speckle_clients[int(speckle.active_user)]
 
         client.stream.create(
-            name=self.stream_name, description=self.stream_description, is_public=True
+            name=self.stream_name, 
+            description=self.stream_description, 
+            is_public=True
         )
 
         bpy.ops.speckle.load_user_streams()
@@ -609,8 +542,6 @@ class CreateStream(bpy.types.Operator):
         if context.area:
             context.area.tag_redraw()
 
-        return {"FINISHED"}
-
 
 class DeleteStream(bpy.types.Operator):
     """
@@ -637,24 +568,30 @@ class DeleteStream(bpy.types.Operator):
 
     def invoke(self, context, event):
         wm = context.window_manager
-        if len(context.scene.speckle.users) > 0:
+        speckle = get_speckle(context)
+        if len(speckle.users) > 0:
             return wm.invoke_props_dialog(self)
 
         return {"CANCELLED"}
 
     def execute(self, context):
+        try:
+            self.delete_stream(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
 
+    def delete_stream(self, context: Context) -> None:
         if not self.are_you_sure:
-            return {"CANCELLED"}
+            raise Exception("Cancled by user")
 
         self.are_you_sure = False
 
-        check = _check_speckle_client_user_stream(context.scene)
-        if check is None:
-            return {"CANCELLED"}
+        speckle = get_speckle(context)
+        (_, stream) = speckle.validate_stream_selection()
 
-        user, stream = check
-        client = speckle_clients[int(context.scene.speckle.active_user)]
+        client = speckle_clients[int(speckle.active_user)]
 
         client.stream.delete(id=stream.id)
 
@@ -669,7 +606,6 @@ class DeleteStream(bpy.types.Operator):
 
         if context.area:
             context.area.tag_redraw()
-        return {"FINISHED"}
 
 
 class SelectOrphanObjects(bpy.types.Operator):
@@ -698,43 +634,6 @@ class SelectOrphanObjects(bpy.types.Operator):
 
         return {"FINISHED"}
 
-
-class UpdateGlobal(bpy.types.Operator):
-    """
-    DEPRECATED
-    Update all Speckle objects
-    """
-
-    bl_idname = "speckle.update_global"
-    bl_label = "Update Global"
-    bl_options = {"REGISTER", "UNDO"}
-    bl_description = "Update all Speckle objects"
-
-    client = None
-
-    def draw(self, context):
-        layout = self.layout
-        row = layout.row()
-        label = row.label(text="Update everything.")
-
-    def execute(self, context):
-
-        client = context.scene.speckle.client
-
-        profiles = client.load_local_profiles()
-        if len(profiles) < 1:
-            raise ValueError("No profiles found.")
-        client.use_existing_profile(sorted(profiles.keys())[0])
-        context.scene.speckle.user = sorted(profiles.keys())[0]
-
-        for obj in context.scene.objects:
-            if obj.speckle.enabled:
-                UpdateObject(context.scene.speckle_client, obj)
-
-        context.scene.update()
-        return {"FINISHED"}
-
-
 class CopyStreamId(bpy.types.Operator):
     """
     Copy stream ID to clipboard
@@ -746,16 +645,18 @@ class CopyStreamId(bpy.types.Operator):
     bl_description = "Copy stream ID to clipboard"
 
     def execute(self, context):
-        speckle = context.scene.speckle
+        try:
+            self.copy_stream_id(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
+        
+    def copy_stream_id(self, context) -> None:
+        speckle = get_speckle(context)
 
-        if len(speckle.users) < 1:
-            return {"CANCELLED"}
-        user = speckle.users[int(speckle.active_user)]
-        if len(user.streams) < 1:
-            return {"CANCELLED"}
-        stream = user.streams[user.active_stream]
+        (_, stream) = speckle.validate_stream_selection()
         bpy.context.window_manager.clipboard = stream.id
-        return {"FINISHED"}
 
 
 class CopyCommitId(bpy.types.Operator):
@@ -769,22 +670,18 @@ class CopyCommitId(bpy.types.Operator):
     bl_description = "Copy commit ID to clipboard"
 
     def execute(self, context):
-        speckle = context.scene.speckle
+        try:
+            self.copy_commit_id(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
+        
+    def copy_commit_id(self, context) -> None:
+        speckle = get_speckle(context)
 
-        if len(speckle.users) < 1:
-            return {"CANCELLED"}
-        user = speckle.users[int(speckle.active_user)]
-        if len(user.streams) < 1:
-            return {"CANCELLED"}
-        stream = user.streams[user.active_stream]
-        if len(stream.branches) < 1:
-            return {"CANCELLED"}
-        branch = stream.branches[int(stream.branch)]
-        if len(branch.commits) < 1:
-            return {"CANCELLED"}
-        commit = branch.commits[int(branch.commit)]
+        (_, _, _, commit) = speckle.validate_commit_selection()
         bpy.context.window_manager.clipboard = commit.id
-        return {"FINISHED"}
 
 
 class CopyBranchName(bpy.types.Operator):
@@ -798,16 +695,16 @@ class CopyBranchName(bpy.types.Operator):
     bl_description = "Copy branch name to clipboard"
 
     def execute(self, context):
-        speckle = context.scene.speckle
+        try:
+            self.copy_branch_id(context)
+            return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
+        
+    def copy_branch_id(self, context) -> None:
+        speckle = get_speckle(context)
+
+        (_, _, branch) = speckle.validate_branch_selection()
 
-        if len(speckle.users) < 1:
-            return {"CANCELLED"}
-        user = speckle.users[int(speckle.active_user)]
-        if len(user.streams) < 1:
-            return {"CANCELLED"}
-        stream = user.streams[user.active_stream]
-        if len(stream.branches) < 1:
-            return {"CANCELLED"}
-        branch = stream.branches[int(stream.branch)]
         bpy.context.window_manager.clipboard = branch.name
-        return {"FINISHED"}

bpy_speckle/operators/users.py

@@ -1,13 +1,39 @@
 """
 User account operators
 """
+from typing import cast
 import bpy
+from bpy.types import Context
 from bpy_speckle.functions import _report
 from bpy_speckle.clients import speckle_clients
+from bpy_speckle.properties.scene import SpeckleCommitObject, SpeckleSceneSettings, SpeckleUserObject, get_speckle
 from specklepy.api.client import SpeckleClient
+from specklepy.api.models import Stream
 from specklepy.api.credentials import get_local_accounts
-from datetime import datetime
 
+class ResetUsers(bpy.types.Operator):
+    """
+    Reset loaded users
+    """
+
+    bl_idname = "speckle.users_reset"
+    bl_label = "Reset users"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        self.reset_ui(context)
+
+        bpy.context.view_layer.update()
+        if context.area:
+            context.area.tag_redraw()
+        return {"FINISHED"}
+
+    @staticmethod
+    def reset_ui(context: Context):
+        speckle = get_speckle(context)
+
+        speckle.users.clear()
+        speckle_clients.clear()
 
 class LoadUsers(bpy.types.Operator):
     """
@@ -22,36 +48,38 @@ class LoadUsers(bpy.types.Operator):
 
         _report("Loading users...")
 
-        users = context.scene.speckle.users
+        speckle = cast(SpeckleSceneSettings, context.scene.speckle) #type: ignore
+        users = speckle.users
 
-        context.scene.speckle.users.clear()
-        speckle_clients.clear()
+        ResetUsers.reset_ui(context)
 
         profiles = get_local_accounts()
+        active_user_index = 0
 
         for profile in profiles:
             user = users.add()
             user.server_name = profile.serverInfo.name or "Speckle Server"
             user.server_url = profile.serverInfo.url
+            user.id = profile.userInfo.id
             user.name = profile.userInfo.name
             user.email = profile.userInfo.email
             user.company = profile.userInfo.company or ""
-            user.authToken = profile.token
             try:
+                url = profile.serverInfo.url
+                assert(url)
                 client = SpeckleClient(
-                    host=profile.serverInfo.url,
-                    use_ssl="https" in profile.serverInfo.url,
+                    host=url,
+                    use_ssl="https" in url,
                 )
-                client.authenticate(user.authToken)
+                client.authenticate_with_account(profile)
                 speckle_clients.append(client)
             except Exception as ex:
                 _report(ex)
                 users.remove(len(users) - 1)
             if profile.isDefault:
-                context.scene.speckle.active_user = str(len(users) - 1)
+                active_user_index = len(users) - 1
 
-        context.scene.speckle.active_user_index = int(context.scene.speckle.active_user)
-        bpy.ops.speckle.load_user_streams()
+        speckle.active_user = str(active_user_index)
         bpy.context.view_layer.update()
 
         if context.area:
@@ -59,7 +87,7 @@ class LoadUsers(bpy.types.Operator):
         return {"FINISHED"}
 
 
-def add_user_stream(user, stream):
+def add_user_stream(user: SpeckleUserObject, stream: Stream):
     s = user.streams.add()
     s.name = stream.name
     s.id = stream.id
@@ -77,16 +105,17 @@ def add_user_stream(user, stream):
             continue
 
         for c in b.commits.items:
-            commit = branch.commits.add()
+            commit: SpeckleCommitObject = branch.commits.add()
             commit.id = commit.name = c.id
             commit.message = c.message or ""
             commit.author_name = c.authorName
             commit.author_id = c.authorId
-            commit.created_at = datetime.strftime(c.createdAt, "%Y-%m-%d %H:%M:%S.%f%Z")
+            commit.created_at = c.createdAt.strftime("%Y-%m-%d %H:%M:%S.%f%Z") if c.createdAt else ""
             commit.source_application = str(c.sourceApplication)
+            commit.referenced_object = c.referencedObject
 
     if hasattr(s, "baseProperties"):
-        s.units = stream.baseProperties.units
+        s.units = stream.baseProperties.units # type: ignore
     else:
         s.units = "Meters"
 
@@ -102,33 +131,40 @@ class LoadUserStreams(bpy.types.Operator):
     bl_description = "(Re)load all available user streams"
 
     def execute(self, context):
-        speckle = context.scene.speckle
-
-        if len(speckle.users) > 0:
-            user = speckle.users[int(context.scene.speckle.active_user)]
-            client = speckle_clients[int(context.scene.speckle.active_user)]
-
-            try:
-                streams = client.stream.list(stream_limit=20)
-            except Exception as e:
-                _report(f"Failed to retrieve streams: {e}")
-                return
-            if not streams:
-                _report("Failed to retrieve streams.")
-                return
-
-            user.streams.clear()
-
-            default_units = "Meters"
-
-            for s in streams:
-                sstream = client.stream.get(id=s.id, branch_limit=20)
-                add_user_stream(user, sstream)
-
-            bpy.context.view_layer.update()
-
+        try:
+            self.add_stream_from_url(context)
             return {"FINISHED"}
+        except Exception as ex:
+            _report(f"{self.bl_idname} failed: {ex}")
+            return {"CANCELLED"} 
+        
+    def add_stream_from_url(self, context: Context) -> None:
+        speckle = get_speckle(context)
+
+        user = speckle.validate_user_selection()
+
+        client = speckle_clients[int(speckle.active_user)]
+
+        try:
+            streams = client.stream.list(stream_limit=20)
+        except Exception as e:
+            _report(f"Failed to retrieve streams: {e}")
+            return
+        if not streams:
+            _report("Failed to retrieve streams.")
+            return
+
+        user.streams.clear()
+
+        default_units = "Meters"
+
+        for s in streams:
+            assert(s.id)
+            sstream = client.stream.get(id=s.id, branch_limit=20)
+            add_user_stream(user, sstream)
+
+        bpy.context.view_layer.update()
 
         if context.area:
             context.area.tag_redraw()
-        return {"CANCELLED"}
+

bpy_speckle/properties/scene.py

@@ -1,6 +1,7 @@
 """
 Scene properties
 """
+from typing import Optional, Tuple
 import bpy
 from bpy.props import (
     StringProperty,
@@ -12,18 +13,18 @@ from bpy.props import (
     PointerProperty,
 )
 
-
 class SpeckleSceneObject(bpy.types.PropertyGroup):
     name: bpy.props.StringProperty(default="")
 
 
 class SpeckleCommitObject(bpy.types.PropertyGroup):
-    id: StringProperty(default="abc")
-    message: StringProperty(default="A simple commit")
-    author_name: StringProperty(default="Author name")
-    author_id: StringProperty(default="Author ID")
-    created_at: StringProperty(default="Today")
-    source_application: StringProperty(default="Unknown")
+    id: StringProperty(default="")
+    message: StringProperty(default="")
+    author_name: StringProperty(default="")
+    author_id: StringProperty(default="")
+    created_at: StringProperty(default="")
+    source_application: StringProperty(default="")
+    referenced_object: StringProperty(default="")
 
 
 class SpeckleBranchObject(bpy.types.PropertyGroup):
@@ -42,6 +43,12 @@ class SpeckleBranchObject(bpy.types.PropertyGroup):
         description="Active commit",
         items=get_commits,
     )
+    
+    def get_active_commit(self) -> Optional[SpeckleCommitObject]:
+        selected_index = int(self.commit)
+        if 0 <= selected_index < len(self.commits): 
+            return self.commits[selected_index]
+        return None
 
 
 class SpeckleStreamObject(bpy.types.PropertyGroup):
@@ -66,17 +73,28 @@ class SpeckleStreamObject(bpy.types.PropertyGroup):
         items=get_branches,
     )
 
+    def get_active_branch(self) -> Optional[SpeckleBranchObject]:
+        selected_index = int(self.branch)
+        if 0 <= selected_index < len(self.branches): 
+            return self.branches[selected_index]
+        return None
+
 
 class SpeckleUserObject(bpy.types.PropertyGroup):
     server_name: StringProperty(default="SpeckleXYZ")
     server_url: StringProperty(default="https://speckle.xyz")
+    id: StringProperty(default="")
     name: StringProperty(default="Speckle User")
     email: StringProperty(default="user@speckle.xyz")
     company: StringProperty(default="SpeckleSystems")
-    authToken: StringProperty(default="")
     streams: CollectionProperty(type=SpeckleStreamObject)
     active_stream: IntProperty(default=0)
 
+    def get_active_stream(self) -> Optional[SpeckleStreamObject]:
+        selected_index = int(self.active_stream)
+        if 0 <= selected_index < len(self.streams): 
+            return self.streams[selected_index]
+        return None
 
 class SpeckleSceneSettings(bpy.types.PropertyGroup):
     def get_scripts(self, context):
@@ -104,8 +122,8 @@ class SpeckleSceneSettings(bpy.types.PropertyGroup):
 
     active_user: EnumProperty(
         items=get_users,
-        name="User",
-        description="Select user",
+        name="Account",
+        description="Select account",
         update=set_user,
         get=None,
         set=None,
@@ -132,3 +150,47 @@ class SpeckleSceneSettings(bpy.types.PropertyGroup):
         description="Script to run when sending stream objects.",
         items=get_scripts,
     )
+
+    def get_active_user(self) -> Optional[SpeckleUserObject]:
+        selected_index = int(self.active_user)
+        if 0 <= selected_index < len(self.users):
+            return self.users[selected_index]
+        return None
+    
+
+    def validate_user_selection(self) -> SpeckleUserObject:
+        user = self.get_active_user()
+        if not user:
+            raise SelectionException("No user selected/found")
+        return user
+        
+    def validate_stream_selection(self) -> Tuple[SpeckleUserObject, SpeckleStreamObject]:
+        user = self.validate_user_selection()
+
+        stream = user.get_active_stream()
+        if not stream:
+            raise SelectionException("No stream selected/found")
+
+        return (user, stream)
+    
+    def validate_branch_selection(self) -> Tuple[SpeckleUserObject, SpeckleStreamObject, SpeckleBranchObject]:
+        (user, stream) = self.validate_stream_selection()
+
+        branch = stream.get_active_branch()
+        if not branch:
+            raise SelectionException("No branch selected/found")
+        return (user, stream, branch)
+    
+    def validate_commit_selection(self) ->Tuple[SpeckleUserObject, SpeckleStreamObject, SpeckleBranchObject, SpeckleCommitObject]:
+        (user, stream, branch) = self.validate_branch_selection()
+        commit = branch.get_active_commit()
+        if commit is None:
+            raise SelectionException("No commit selected/found")
+        
+        return (user, stream, branch, commit)
+    
+class SelectionException(Exception):
+    pass
+
+def get_speckle(context: bpy.types.Context) -> SpeckleSceneSettings:
+    return context.scene.speckle #type: ignore

bpy_speckle/specklepy_extras/commit_object_builder.py

@@ -0,0 +1,83 @@
+from abc import ABC, abstractmethod
+from dataclasses import dataclass
+from typing import Any, Collection, Dict, Generic, Iterable, List, Optional, Tuple, TypeVar
+from attrs import define
+from specklepy.objects.base import Base
+
+ROOT: str = "__Root"
+
+T = TypeVar('T')
+PARENT_INFO = Tuple[Optional[str], str]
+
+@define(slots=True)
+class CommitObjectBuilder(ABC, Generic[T]):
+
+    converted: Dict[str, Base]
+    _parent_infos: Dict[str, Collection[PARENT_INFO]]
+
+    def __init__(self) -> None:
+        self.converted = {}
+        self._parent_infos = {}
+    
+    @abstractmethod
+    def include_object(self, conversion_result: Base, native_object: T) -> None:
+        pass
+
+    def build_commit_object(self, root_commit_object: Base) -> None:
+        self.apply_relationships(self.converted.values(), root_commit_object)
+
+    def set_relationship(self, app_id: Optional[str], *parent_info : PARENT_INFO) -> None:
+
+        if not app_id:
+            return
+        
+        self._parent_infos[app_id] = parent_info
+
+    def apply_relationships(self, to_add: Iterable[Base], root_commit_object: Base) -> None:
+        for c in to_add:
+            try:
+                self.apply_relationship(c, root_commit_object)
+            except Exception as ex:
+                print(f"Failed to add object {type(c)} to commit object: {ex}")
+
+    def apply_relationship(self, current: Base, root_commit_object: Base):
+        if not current.applicationId: raise Exception(f"Expected applicationId to have been set") 
+        
+        parents = self._parent_infos[current.applicationId]
+        
+        for (parent_id, prop_name) in parents:
+            if not parent_id: continue
+
+            parent: Optional[Base]
+            if parent_id == ROOT:
+                parent = root_commit_object
+            else:
+                parent = self.converted[parent_id] if parent_id in self.converted else None
+            
+            if not parent: continue
+
+            try:
+                elements = get_detached_prop(parent, prop_name)
+                if not isinstance(elements, list):
+                    elements = []
+                    set_detached_prop(parent, prop_name, elements)
+
+                elements.append(current)
+                return
+            except Exception as ex:
+                # A parent was found, but it was invalid (Likely because of a type mismatch on a `elements` property)
+                print(f"Failed to add object {type(current)} to a converted parent; {ex}")
+                
+            raise Exception(f"Could not find a valid parent for object of type {type(current)}. Checked {len(parents)} potential parent, and non were converted!")
+
+
+def get_detached_prop(speckle_object: Base, prop_name: str) -> Optional[Any]:
+    detached_prop_name = get_detached_prop_name(speckle_object, prop_name)
+    return getattr(speckle_object, detached_prop_name, None)
+
+def set_detached_prop(speckle_object: Base, prop_name: str, value: Optional[Any]) -> None:
+    detached_prop_name = get_detached_prop_name(speckle_object, prop_name)
+    setattr(speckle_object, detached_prop_name, value)
+
+def get_detached_prop_name(speckle_object: Base, prop_name: str) -> str:
+    return prop_name if hasattr(speckle_object, prop_name) else f"@{prop_name}"

bpy_speckle/specklepy_extras/traversal.py

@@ -0,0 +1,122 @@
+from typing import Any, Callable, Collection, Iterable, Iterator, List, Optional, Set
+
+from attrs import define
+from typing_extensions import Protocol, final
+
+from specklepy.objects import Base
+
+
+class ITraversalRule(Protocol):
+    def get_members_to_traverse(self, o: Base) -> Set[str]:
+        """Get the members to traverse."""
+        pass
+
+    def does_rule_hold(self, o: Base) -> bool:
+        """Make sure the rule still holds."""
+        pass
+
+
+@final
+class DefaultRule:
+    def get_members_to_traverse(self, _) -> Set[str]:
+        return set()
+
+    def does_rule_hold(self, _) -> bool:
+        return True
+
+
+# we're creating a local protected "singleton"
+_default_rule = DefaultRule()
+
+
+@final
+@define(slots=True, frozen=True)
+class TraversalContext:
+    current: Base
+    member_name: Optional[str] = None
+    parent: Optional["TraversalContext"] = None
+
+
+@final
+@define(slots=True, frozen=True)
+class GraphTraversal:
+
+    _rules: List[ITraversalRule]
+
+    def traverse(self, root: Base) -> Iterator[TraversalContext]:
+        stack: List[TraversalContext] = []
+
+        stack.append(TraversalContext(root))
+
+        while len(stack) > 0:
+            head = stack.pop()
+            yield head
+
+            current = head.current
+            active_rule = self._get_active_rule_or_default_rule(current)
+            members_to_traverse = active_rule.get_members_to_traverse(current)
+            for child_prop in members_to_traverse:
+                try:
+                    if child_prop in {"speckle_type", "units", "applicationId"}: continue #debug: to avoid noisy exceptions, explicitly avoid checking ones we know will fail, this is not exhaustive
+                    if getattr(current, child_prop, None):
+                        value = current[child_prop]
+                        self._traverse_member_to_stack(
+                            stack, value, child_prop, head
+                        )
+                except KeyError as ex:
+                    # Unset application ids, and class variables like SpeckleType will throw when __getitem__ is called
+                    pass
+    @staticmethod
+    def _traverse_member_to_stack(
+        stack: List[TraversalContext],
+        value: Any,
+        member_name: Optional[str] = None,
+        parent: Optional[TraversalContext] = None,
+    ):
+        if isinstance(value, Base):
+            stack.append(TraversalContext(value, member_name, parent))
+        elif isinstance(value, list):
+            for obj in value:
+                GraphTraversal._traverse_member_to_stack(stack, obj, member_name, parent)
+        elif isinstance(value, dict):
+            for obj in value.values():
+                GraphTraversal._traverse_member_to_stack(stack, obj, member_name, parent)
+
+    @staticmethod
+    def traverse_member(value: Optional[Any]) -> Iterator[Base]:
+        if isinstance(value, Base):
+            yield value
+        elif isinstance(value, list):
+            for obj in value:
+                for o in GraphTraversal.traverse_member(obj):
+                    yield o
+        elif isinstance(value, dict):
+            for obj in value.values():
+                for o in GraphTraversal.traverse_member(obj):
+                    yield o
+
+
+    def _get_active_rule_or_default_rule(self, o: Base) -> ITraversalRule:
+        return self._get_active_rule(o) or _default_rule
+
+    def _get_active_rule(self, o: Base) -> Optional[ITraversalRule]:
+        for rule in self._rules:
+            if rule.does_rule_hold(o):
+                return rule
+        return None
+
+
+@final
+@define(slots=True, frozen=True)
+class TraversalRule:
+    _conditions: Collection[Callable[[Base], bool]]
+    _members_to_traverse: Callable[[Base], Iterable[str]]
+
+    def get_members_to_traverse(self, o: Base) -> Set[str]:
+        return set(self._members_to_traverse(o))
+
+    def does_rule_hold(self, o: Base) -> bool:
+        for condition in self._conditions:
+            if condition(o):
+                return True
+        return False

bpy_speckle/ui/view3d.py

@@ -115,13 +115,14 @@ class VIEW3D_PT_SpeckleUser(bpy.types.Panel):
         col = layout.column()
 
         if len(speckle.users) < 1:
-            col.label(text="No users found.")
+            col.label(text="Refresh to initialise")
         else:
             col.prop(speckle, "active_user", text="")
             user = speckle.users[int(speckle.active_user)]
             col.label(text="{} ({})".format(user.server_name, user.server_url))
             col.label(text="{} ({})".format(user.name, user.email))
-
+            
+        col.operator("speckle.users_load", text="", icon="FILE_REFRESH")
 
 class VIEW3D_PT_SpeckleStreams(bpy.types.Panel):
     """
@@ -230,9 +231,6 @@ class VIEW3D_PT_SpeckleActiveStream(bpy.types.Panel):
 
                 row = col.row(align=True)
                 subcol = row.column()
-                subcol.label(text="Units:")
-                subcol = row.column()
-                subcol.label(text=stream.units)
 
                 col.label(text="Description:")
                 area = col.box()

export_dependencies.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -e -o pipefail
+
+poetry export --only main -o bpy_speckle/requirements.txt

patch_installer.py

@@ -0,0 +1,20 @@
+import sys
+from pathlib import Path
+
+
+def patch_installer(tag: str):
+    """Patches the installer with the correct connector version and specklepy version"""
+    tag = tag.replace("\n", "")
+    iss_file = "speckle-sharp-ci-tools/blender.iss"
+    iss_path =  Path(iss_file)
+    lines = iss_path.read_text().split("\n")
+    lines.insert(12, f'#define AppVersion "{tag.split("-")[0]}"')
+    lines.insert(13, f'#define AppInfoVersion "{tag}"')
+
+    iss_path.write_text("\n".join(lines))
+    print(f"Patched installer with connector v{tag}")
+
+
+if __name__ == "__main__":
+    tag = sys.argv[1]
+    patch_installer(tag)

patch_version.py

@@ -1,7 +1,6 @@
 import re
 import sys
 
-
 def patch_connector(tag):
     """Patches the connector version within the connector init file"""
     bpy_file = "bpy_speckle/__init__.py"
@@ -19,48 +18,13 @@ def patch_connector(tag):
         with open(bpy_file, "w") as file:
             file.writelines(lines)
 
-
-def patch_installer(tag):
-    """Patches the installer with the correct connector version and specklepy version"""
-    iss_file = "speckle-sharp-ci-tools/blender.iss"
-
-    py_tag = get_specklepy_version()
-    with open(iss_file, "r") as file:
-        lines = file.readlines()
-        lines.insert(11, f'#define SpecklepyVersion "{py_tag}"\n')
-        lines.insert(11, f'#define AppVersion "{tag}"\n')
-
-        with open(iss_file, "w") as file:
-            file.writelines(lines)
-            print(f"Patched installer with connector v{tag} and specklepy v{py_tag}")
-
-
-def get_specklepy_version():
-    """Get version of specklepy to install from the pyproject.toml"""
-    version = "2.3.3"
-    with open("pyproject.toml", "r") as f:
-        lines = [line for line in f if line.startswith("specklepy = ")]
-        if not lines:
-            raise Exception("Could not find specklepy in pyproject.toml")
-        match = re.search(r"[0-9]+(\.[0-9]+)*", lines[0])
-        if match:
-            version = match[0]
-    return version
-
-
 def main():
-    if len(sys.argv) < 2:
-        print(get_specklepy_version())
-        return
-
     tag = sys.argv[1]
     if not re.match(r"([0-9]+)\.([0-9]+)\.([0-9]+)", tag):
         raise ValueError(f"Invalid tag provided: {tag}")
-    tag = tag.split("-")[0]
 
     print(f"Patching version: {tag}")
-    patch_connector(tag)
-    patch_installer(tag)
+    patch_connector(tag.split("-")[0])
 
 
 if __name__ == "__main__":

pyproject.toml

@@ -2,19 +2,23 @@
 name = "speckle-blender"
 version = "2.0.0"
 description = "the Speckle 2.0 connector for Blender!"
-authors = ["izzy lyseggen <izzy.lyseggen@gmail.com>"]
+authors = ["izzy lyseggen <izzy.lyseggen@gmail.com>", "Gergő Jedlicska <gergo@jedlicska.com>"]
 license = "Apache-2.0"
 
 [tool.poetry.dependencies]
-python = ">=3.7, <4.0.0"
-specklepy = "^2.6.6"
+python = ">=3.8, <4.0.0"
+specklepy = "^2.15.1"
+attrs = "^23.1.0"
 
-[tool.poetry.dev-dependencies]
-devtools = "^0.6.1"
-numpy = "^1.20.2"
-fake-bpy-module-latest = "^20220401"
-black = "^21.12b0"
-pylint = "^2.12.2"
+# [tool.poetry.group.local_specklepy.dependencies]
+# specklepy = {path = "../specklepy", develop = true}
+
+[tool.poetry.group.dev.dependencies]
+numpy = "^1.23.5"
+fake-bpy-module-latest = "^20230117"
+black = "^22.10.0"
+pylint = "^2.15.7"
+ruff = "^0.0.166"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]