GLTFExtensionPlugin: Add support for meshoptDecoder

src/plugins/README.md

@@ -491,9 +491,10 @@ Available options are as follows:
 	// A list of other extensions to include in the loader. All elements are passed to the "GLTFLoader.register" function.
 	plugins: [],
 
-	// DRACOLoader and KTX2Loader instances to add to the loader.
+	// DRACOLoader, KTX2Loader, and MeshoptDecoder instances to add to the loader.
 	dracoLoader: null,
 	ktxLoader: null,
+	meshoptDecoder: null,
 
 	// Whether to automatically dispose of the DRACO and KTX Loaders when the plugin is disposed.
 	autoDispose: true,

src/plugins/three/GLTFExtensionsPlugin.js

@@ -15,6 +15,7 @@ export class GLTFExtensionsPlugin {
 
 			dracoLoader: null,
 			ktxLoader: null,
+			meshoptDecoder: null,
 			autoDispose: true,
 			...options,
 		};
@@ -27,6 +28,7 @@ export class GLTFExtensionsPlugin {
 
 		this.dracoLoader = options.dracoLoader;
 		this.ktxLoader = options.ktxLoader;
+		this.meshoptDecoder = options.meshoptDecoder;
 		this._gltfRegex = /\.(gltf|glb)$/g;
 		this._dracoRegex = /\.drc$/g;
 		this._loader = null;
@@ -49,6 +51,12 @@ export class GLTFExtensionsPlugin {
 
 		}
 
+		if ( this.meshoptDecoder ) {
+
+			loader.setMeshoptDecoder( this.meshoptDecoder );
+
+		}
+
 		if ( this.rtc ) {
 
 			loader.register( () => new GLTFCesiumRTCExtension() );