Merge pull request #8945 from reimund/validateSkinning-fix

Fixed numBadBoneIndices calculation in validateSkinning.

src/Meshes/mesh.ts

@@ -2095,9 +2095,9 @@ export class Mesh extends AbstractMesh implements IGetSetVerticesData {
         let matricesIndices = (<FloatArray>this.getVerticesData(VertexBuffer.MatricesIndicesKind));
         let matricesIndicesExtra = (<FloatArray>this.getVerticesData(VertexBuffer.MatricesIndicesExtraKind));
         let numBadBoneIndices: number = 0;
-        for (var a = 0; a < numWeights; a++) {
+        for (var a = 0; a < numWeights; a += 4) {
             for (var b = 0; b < numInfluences; b++) {
-                let index = b < 4 ? matricesIndices[b] : matricesIndicesExtra[b - 4];
+                let index = b < 4 ? matricesIndices[a + b] : matricesIndicesExtra[a + b - 4];
                 if (index >= numBones || index < 0) { numBadBoneIndices++; }
             }
         }