From d122873f0ef2677a994c46c8d15a3b4c1ab59338 Mon Sep 17 00:00:00 2001
From: Alexandru Popovici <alexandrupopoviciioan@gmail.com>
Date: Wed, 12 Mar 2025 17:02:44 +0200
Subject: [PATCH 1/2] fix(viewer-lib): Fixed the issue where ghosted lines
 would not appear transparent (#4174)

---
 packages/viewer-sandbox/src/main.ts            |  5 +++++
 .../viewer/src/modules/batching/LineBatch.ts   | 18 ++++++++++++++++--
 .../viewer/src/modules/materials/Materials.ts  |  2 ++
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/packages/viewer-sandbox/src/main.ts b/packages/viewer-sandbox/src/main.ts
index 92856a5a1..81f5723dc 100644
--- a/packages/viewer-sandbox/src/main.ts
+++ b/packages/viewer-sandbox/src/main.ts
@@ -474,6 +474,11 @@ const getStream = () => {
 
     // Custom normals
     // 'https://latest.speckle.systems/projects/51c449c440/models/08e97226cf'
+
+    // A LOT of text objects
+    // 'https://app.speckle.systems/projects/e771a388b1/models/f5c967dfa9'
+
+    // 'https://app.speckle.systems/projects/16cffbc224/models/1e142b07a0'
   )
 }
 
diff --git a/packages/viewer/src/modules/batching/LineBatch.ts b/packages/viewer/src/modules/batching/LineBatch.ts
index 4dd1bc61d..e68c1e705 100644
--- a/packages/viewer/src/modules/batching/LineBatch.ts
+++ b/packages/viewer/src/modules/batching/LineBatch.ts
@@ -31,8 +31,11 @@ export default class LineBatch implements Batch {
   public renderViews: NodeRenderView[]
   protected geometry: LineSegmentsGeometry
   public batchMaterial: SpeckleLineMaterial
+  protected batchTransparent: boolean
+  protected batchOpacity: number
   protected mesh: LineSegments2
-  public colorBuffer!: InstancedInterleavedBuffer
+  public colorBuffer: InstancedInterleavedBuffer
+
   private static readonly vector4Buffer: Vector4 = new Vector4()
 
   public get bounds(): Box3 {
@@ -94,6 +97,9 @@ export default class LineBatch implements Batch {
 
   public setBatchMaterial(material: SpeckleLineMaterial) {
     this.batchMaterial = material
+    /** Not a fan of this :( */
+    this.batchTransparent = material.transparent
+    this.batchOpacity = material.opacity
   }
 
   public onUpdate(deltaTime: number) {
@@ -169,6 +175,9 @@ export default class LineBatch implements Batch {
 
   public setBatchBuffers(ranges: BatchUpdateRange[]): void {
     const data = this.colorBuffer.array as number[]
+    /** Reset transparency */
+    this.batchMaterial.transparent = this.batchTransparent
+    this.batchMaterial.opacity = this.batchOpacity
 
     for (let i = 0; i < ranges.length; i++) {
       const material = ranges[i].material as SpeckleLineMaterial
@@ -179,6 +188,10 @@ export default class LineBatch implements Batch {
           : material.color
       const alpha: number = material.visible ? material.opacity : 0
       this.batchMaterial.transparent ||= material.opacity < 1
+      this.batchMaterial.opacity = Math.min(
+        this.batchMaterial.opacity,
+        material.opacity
+      )
       const start = ranges[i].offset * this.colorBuffer.stride
       const len =
         ranges[i].offset * this.colorBuffer.stride +
@@ -211,7 +224,8 @@ export default class LineBatch implements Batch {
     ])
     this.mesh.material = this.batchMaterial
     this.mesh.visible = true
-    this.batchMaterial.transparent = false
+    this.batchMaterial.transparent = this.batchTransparent
+    this.batchMaterial.opacity = this.batchOpacity
   }
 
   public buildBatch() {
diff --git a/packages/viewer/src/modules/materials/Materials.ts b/packages/viewer/src/modules/materials/Materials.ts
index d6a4c3842..c6d27fd37 100644
--- a/packages/viewer/src/modules/materials/Materials.ts
+++ b/packages/viewer/src/modules/materials/Materials.ts
@@ -425,6 +425,8 @@ export default class Materials {
     ;(<SpeckleLineMaterial>this.lineGhostMaterial).pixelThreshold = 0.5
     ;(<SpeckleLineMaterial>this.lineGhostMaterial).resolution = new Vector2()
     ;(<SpeckleLineMaterial>this.lineGhostMaterial).toneMapped = false
+    ;(<SpeckleLineMaterial>this.lineGhostMaterial).opacity = 0.1
+    ;(<SpeckleLineMaterial>this.lineGhostMaterial).transparent = true
 
     this.lineColoredMaterial = new SpeckleLineMaterial(
       {

From e6cbe556b55e92df03d26a7bd272e776ec27950e Mon Sep 17 00:00:00 2001
From: Jedd Morgan <45512892+JR-Morgan@users.noreply.github.com>
Date: Wed, 12 Mar 2025 15:51:37 +0000
Subject: [PATCH 2/2] Bump IFC nuget (#4176)

---
 packages/fileimport-service/ifc-dotnet/ifc-converter.csproj | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/fileimport-service/ifc-dotnet/ifc-converter.csproj b/packages/fileimport-service/ifc-dotnet/ifc-converter.csproj
index a600eedb5..df2c94ad1 100644
--- a/packages/fileimport-service/ifc-dotnet/ifc-converter.csproj
+++ b/packages/fileimport-service/ifc-dotnet/ifc-converter.csproj
@@ -10,7 +10,7 @@
 
     <ItemGroup>
       <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
-      <PackageReference Include="Speckle.Importers.Ifc" Version="3.1.0-nuget-wip.1" />
+      <PackageReference Include="Speckle.Importers.Ifc" Version="3.0.2-adam.3-38-gbdabd10b" />
       <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
     </ItemGroup>