Release 0.9.2

build/RayTracingRenderer.es5.js

@@ -1934,11 +1934,6 @@
       }
 
       var dim = maximumExtent(centroidBounds);
-
-      if (centroidBounds.max[dim] === centroidBounds.min[dim]) {
-        return makeLeafNode(primitiveInfo.slice(start, end), bounds);
-      }
-
       var mid = Math.floor((start + end) / 2); // middle split method
       // const dimMid = (centroidBounds.max[dim] + centroidBounds.min[dim]) / 2;
       // mid = partition(primitiveInfo, p => p.center[dim] < dimMid, start, end);
@@ -1952,6 +1947,9 @@
         nthElement(primitiveInfo, function (a, b) {
           return a.center[dim] < b.center[dim];
         }, start, end, mid);
+      } else if (centroidBounds.max[dim] === centroidBounds.min[dim]) {
+        // can't split primitives based on centroid bounds. terminate.
+        return makeLeafNode(primitiveInfo.slice(start, end), bounds);
       } else {
         var buckets = [];
 

build/RayTracingRenderer.js

@@ -1672,9 +1672,6 @@ vec3 getMatNormal(int materialIndex, vec2 uv, vec3 normal, vec3 dp1, vec3 dp2, v
       }
       const dim = maximumExtent(centroidBounds);
 
-      if (centroidBounds.max[dim] === centroidBounds.min[dim]) {
-        return makeLeafNode(primitiveInfo.slice(start, end), bounds);
-      }
 
       let mid = Math.floor((start + end) / 2);
 
@@ -1690,7 +1687,11 @@ vec3 getMatNormal(int materialIndex, vec2 uv, vec3 normal, vec3 dp1, vec3 dp2, v
       // surface area heuristic method
       if (nPrimitives <= 4) {
         nthElement(primitiveInfo, (a, b) => a.center[dim] < b.center[dim], start, end, mid);
+      } else if (centroidBounds.max[dim] === centroidBounds.min[dim]) {
+        // can't split primitives based on centroid bounds. terminate.
+        return makeLeafNode(primitiveInfo.slice(start, end), bounds);
       } else {
+
         const buckets = [];
         for (let i = 0; i < 12; i++) {
           buckets.push({

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ray-tracing-renderer",
-  "version": "0.9.1",
+  "version": "0.9.2",
   "description": "A [Three.js](https://github.com/mrdoob/three.js/) renderer which utilizes path tracing to render a scene with true photorealism. The renderer supports global illumination, reflections, soft shadows, and realistic environment lighting.",
   "main": "build/RayTracingRenderer.js",
   "scripts": {