fix(viewer-lib): Fixed explode mode (#984) (#5748)

packages/viewer-sandbox/src/main.ts

@@ -134,9 +134,11 @@ const createViewer = async (containerName: string, _stream: string) => {
 const getStream = () => {
   return (
     // prettier-ignore
-    'https://app.speckle.systems/projects/1b96a34aae/models/a8698c0c67'
+    // 'https://app.speckle.systems/projects/1b96a34aae/models/a8698c0c67'
     // Revit sample house (good for bim-like stuff with many display meshes)
-    // 'https://app.speckle.systems/streams/da9e320dad/commits/5388ef24b8'
+    'https://app.speckle.systems/projects/9638b98615/models/2d8e1ef75b@241c9de8d5'
+
+    // 'https://app.speckle.systems/streams/da9e320dad/commits/5388ef24b8' :'(
     // 'https://app.speckle.systems/streams/da9e320dad/objects/ee5d160d84090822813bc74188da34a7'
 
     //large tower
@@ -673,6 +675,8 @@ const getStream = () => {
 
     // Texts and empty texts
     // 'https://app.speckle.systems/projects/8b466869c0/models/d1eabb3c74'
+
+    // 'https://app.speckle.systems/projects/d7d987146d/models/1556042389'
   )
 }
 

packages/viewer/src/modules/extensions/ExplodeExtension.ts

@@ -23,6 +23,7 @@ export class ExplodeExtension extends Extension {
   /** Similar to SpeckleRenderer's visibleSceneBox, but with static boxes from render views */
   public get visibleWorld(): Box3 {
     const bounds: Box3 = new Box3()
+    const scratchBox = new Box3()
     const batches = this.viewer.getRenderer().batcher.getBatches()
     for (let k = 0; k < batches.length; k++) {
       const batch = batches[k]
@@ -48,7 +49,14 @@ export class ExplodeExtension extends Extension {
         if (s.batchStart >= qEnd) break
         const sEnd = s.batchStart + s.batchCount
         if (s.batchStart >= qStart && sEnd <= qEnd) {
-          bounds.union(s.aabb)
+          /** Alex 18.02.2026: There is an issue with using the render view's aabb.
+           *  Instanced render views will always provide incorrect bounds unless transformed
+           *  Which is what we are doing here */
+          scratchBox.copy(s.aabb)
+          s.renderData.geometry.transform &&
+            s.renderData.geometry.instanced &&
+            scratchBox.applyMatrix4(s.renderData.geometry.transform)
+          bounds.union(scratchBox)
         }
       }
     }