adjust test (passes test)

Author: MatsErdkamp

src/gltf/gltf-parser.ts

@@ -32,9 +32,13 @@ export class glTFParser {
    * Creates a new parser using the specified asset.
    * @param asset The asset to parse.
    * @param materialFactory The material factory to use.
-   * @param meshoptDecoder optionally provide meshoptDecoder to parse meshopt meshes.
+   * @param meshoptDecoder provide meshoptimizer's meshoptDecoder to parse meshopt meshes.
    */
-  constructor(asset: glTFAsset, materialFactory?: MaterialFactory, meshoptDecoder?: any) {
+  constructor(
+    asset: glTFAsset,
+    materialFactory?: MaterialFactory,
+    meshoptDecoder?: any
+  ) {
     this._asset = asset;
     this._materialFactory = materialFactory || new StandardMaterialFactory();
     this._descriptor = this._asset.descriptor;
@@ -52,7 +56,11 @@ export class glTFParser {
    * @param asset The asset to create the model from.
    * @param materialFactory The material factory to use.
    */
-  static createModel(asset: glTFAsset, materialFactory?: MaterialFactory, meshoptDecoder ?: any) {
+  static createModel(
+    asset: glTFAsset,
+    materialFactory?: MaterialFactory,
+    meshoptDecoder?: any
+  ) {
     return new glTFParser(asset, materialFactory, meshoptDecoder).parseModel();
   }
 
@@ -100,15 +108,18 @@ export class glTFParser {
     let buffer = this._asset.buffers[bufferView.buffer];
 
     if (bufferView.extensions?.EXT_meshopt_compression != undefined) {
-
-      if (this._meshoptDecoder == undefined) {
-        console.error('Buffer uses EXT_meshopt_compression but meshoptDecoder is not provided.');
-        return;
+      if (this._meshoptDecoder != undefined) {
+        const meshoptExtension = bufferView.extensions.EXT_meshopt_compression;
+        buffer = this.decodeMeshoptBuffer(
+          meshoptExtension,
+          accessor.bufferView
+        );
+        offset = accessor.byteOffset || 0;
+      } else {
+        console.error(
+          "Buffer uses EXT_meshopt_compression but meshoptDecoder is not provided."
+        );
       }
-
-      const meshoptExtension = bufferView.extensions.EXT_meshopt_compression;
-      buffer = this.decodeMeshoptBuffer(meshoptExtension, accessor.bufferView);
-      offset = accessor.byteOffset || 0;
     }
 
     return glTFAttribute.from(

test/gltf.test.mjs

@@ -1,4 +1,5 @@
 import { expect } from "chai";
+import { MeshoptDecoder } from "meshoptimizer";
 
 describe("glTF", () => {
   it("should render separate correctly using pixi *.*.*", async () => {
@@ -52,7 +53,9 @@ describe("glTF", () => {
   it("should render meshopt correctly using pixi *.*.*", async () => {
     let render = (renderer, resources) => {
       let model = PIXI3D.Model.from(
-        resources["assets/teapot/teapot-binary-meshopt.glb"].gltf
+        resources["assets/teapot/teapot-binary-meshopt.glb"].gltf,
+        undefined,
+        MeshoptDecoder
       );
       model.y = -0.8;
       model.meshes.forEach((mesh) => {