Trying to debug the TAS bvh

packages/viewer-sandbox/src/main.ts

@@ -105,7 +105,7 @@ const getStream = () => {
     // prettier-ignore
     // 'https://speckle.xyz/streams/da9e320dad/commits/5388ef24b8?c=%5B-7.66134,10.82932,6.41935,-0.07739,-13.88552,1.8697,0,1%5D'
     // Revit sample house (good for bim-like stuff with many display meshes)
-    'https://speckle.xyz/streams/da9e320dad/commits/5388ef24b8'
+    // 'https://speckle.xyz/streams/da9e320dad/commits/5388ef24b8'
     // 'https://latest.speckle.dev/streams/c1faab5c62/commits/ab1a1ab2b6'
     // 'https://speckle.xyz/streams/da9e320dad/commits/5388ef24b8'
     // 'https://latest.speckle.dev/streams/58b5648c4d/commits/60371ecb2d'
@@ -388,6 +388,9 @@ const getStream = () => {
     // 'https://app.speckle.systems/projects/122448a81e/models/f21aff1f4a'
     // Thin plane
     // 'https://app.speckle.systems/projects/20f72acc58/models/2cf8a736f8'
+    // Rhino sRGB vertex colors
+    // 'https://app.speckle.systems/projects/47bbaf594f/models/ef78e94f72'
+    'https://app.speckle.systems/projects/47bbaf594f/models/de52414725f8937b1f0e2f550ef9ca52'
   )
 }
 

packages/viewer/src/modules/SpeckleRenderer.ts

@@ -605,7 +605,9 @@ export default class SpeckleRenderer {
   private addBatch(batch: Batch, parent: Object3D) {
     const batchRenderable = batch.renderObject
     parent.add(batch.renderObject)
-
+    if (batchRenderable instanceof SpeckleMesh) {
+      parent.add(batchRenderable.TAS.bvhHelper)
+    }
     if (batch.geometryType === GeometryType.MESH) {
       batchRenderable.traverse((obj: Object3D) => {
         if (obj instanceof Mesh) {

packages/viewer/src/modules/objects/TopLevelAccelerationStructure.ts

@@ -2,14 +2,19 @@ import {
   Box3,
   Box3Helper,
   BufferAttribute,
+  BufferGeometry,
   Color,
+  Float32BufferAttribute,
   FrontSide,
   Material,
   Matrix4,
+  Mesh,
   Ray,
   Side,
+  Uint32BufferAttribute,
   Vector3
 } from 'three'
+import { MeshBVHVisualizer } from 'three-mesh-bvh'
 import { ExtendedTriangle, HitPointInfo } from 'three-mesh-bvh'
 import { BatchObject } from '../batching/BatchObject'
 import type {
@@ -59,6 +64,7 @@ export class TopLevelAccelerationStructure {
 
   public boxHelpers: Box3Helper[] = []
   public accelerationStructure: AccelerationStructure
+  public bvhHelper: MeshBVHVisualizer
 
   public constructor(batchObjects: BatchObject[]) {
     this.batchObjects = batchObjects
@@ -99,6 +105,21 @@ export class TopLevelAccelerationStructure {
     this.accelerationStructure.outputTransform = new Matrix4()
     this.accelerationStructure.inputOriginTransform = new Matrix4()
     this.accelerationStructure.outputOriginTransfom = new Matrix4()
+    const geom = new BufferGeometry()
+    geom.setIndex(new Uint32BufferAttribute(new Uint32Array(indices), 1))
+    geom.setAttribute(
+      'position',
+      new Float32BufferAttribute(new Float32Array(vertices), 3)
+    )
+    geom.computeBoundingBox()
+
+    const mesh = new Mesh(geom)
+    mesh.layers.set(ObjectLayers.OVERLAY)
+    mesh.geometry.boundsTree = this.accelerationStructure.bvh
+    this.bvhHelper = new MeshBVHVisualizer(mesh)
+    this.bvhHelper.layers.set(ObjectLayers.OVERLAY)
+    this.bvhHelper.children[0].layers.set(ObjectLayers.OVERLAY)
+    this.bvhHelper.update()
   }
 
   private updateVertArray(box: Box3, offset: number, outPositions: number[]) {