feat: add gltf loader types (#143)

* Add gltf loader types

* Update `createNodeMesh` return types

* Add entry to contributors

.all-contributorsrc

@@ -268,6 +268,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "robertlong",
+      "name": "Robert Long",
+      "avatar_url": "https://avatars.githubusercontent.com/u/1753624?v=4",
+      "profile": "https://github.com/robertlong",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "skipCi": true,

types/three/examples/jsm/loaders/GLTFLoader.d.ts

@@ -13,6 +13,9 @@ import {
     Material,
     SkinnedMesh,
     Texture,
+    TextureLoader,
+    FileLoader,
+    ImageBitmapLoader,
 } from '../../../src/Three';
 
 import { DRACOLoader } from './DRACOLoader';
@@ -75,6 +78,19 @@ export interface GLTFReference {
 export class GLTFParser {
     json: any;
 
+    options: {
+        path: string;
+        manager: LoadingManager;
+        ktx2Loader: KTX2Loader;
+        meshoptDecoder: /* MeshoptDecoder */ any;
+        crossOrigin: string;
+        requestHeader: { [header: string]: string };
+    };
+
+    fileLoader: FileLoader;
+    textureLoader: TextureLoader | ImageBitmapLoader;
+    plugins: GLTFLoaderPlugin;
+    extensions: { [name: string]: any };
     associations: Map<Object3D | Material | Texture, GLTFReference>;
 
     getDependency: (type: string, index: number) => Promise<any>;
@@ -135,5 +151,6 @@ export interface GLTFLoaderPlugin {
     extendMaterialParams?:
         | ((materialIndex: number, materialParams: { [key: string]: any }) => Promise<any> | null)
         | undefined;
+    createNodeMesh?: ((nodeIndex: number) => Promise<Group | Mesh | SkinnedMesh> | null) | undefined;
     createNodeAttachment?: ((nodeIndex: number) => Promise<Object3D> | null) | undefined;
 }