[3d] support mtl for obj file (#3933)

Co-authored-by: github-actions <[email protected]>

Author: jtydhr88

src/components/load3d/Load3DScene.vue

@@ -76,7 +76,7 @@ const eventConfig = {
     emit('recordingStatusChange', value)
 } as const
 
-watchEffect(async () => {
+watchEffect(() => {
   if (load3d.value) {
     const rawLoad3d = toRaw(load3d.value) as Load3d
 
@@ -86,10 +86,20 @@ watchEffect(async () => {
     rawLoad3d.setFOV(props.fov)
     rawLoad3d.toggleCamera(props.cameraType)
     rawLoad3d.togglePreview(props.showPreview)
-    await rawLoad3d.setBackgroundImage(props.backgroundImage)
   }
 })
 
+watch(
+  () => props.backgroundImage,
+  async (newValue) => {
+    if (load3d.value) {
+      const rawLoad3d = toRaw(load3d.value) as Load3d
+
+      await rawLoad3d.setBackgroundImage(newValue)
+    }
+  }
+)
+
 watch(
   () => props.upDirection,
   (newValue) => {

src/extensions/core/load3d/Load3d.ts

@@ -118,7 +118,11 @@ class Load3d {
       options
     )
 
-    this.loaderManager = new LoaderManager(this.modelManager, this.eventManager)
+    this.loaderManager = new LoaderManager(
+      this.modelManager,
+      this.eventManager,
+      options
+    )
 
     this.recordingManager = new RecordingManager(
       this.sceneManager.scene,

src/extensions/core/load3d/LoaderManager.ts

@@ -1,23 +1,24 @@
 import * as THREE from 'three'
 import { FBXLoader } from 'three/examples/jsm/loaders/FBXLoader'
 import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader'
-import { MTLLoader } from 'three/examples/jsm/loaders/MTLLoader'
 import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader'
 import { STLLoader } from 'three/examples/jsm/loaders/STLLoader'
 
+import { OverrideMTLLoader } from '@/extensions/core/load3d/threejsOverride/OverrideMTLLoader'
 import { t } from '@/i18n'
 import { useToastStore } from '@/stores/toastStore'
 
 import {
   EventManagerInterface,
+  Load3DOptions,
   LoaderManagerInterface,
   ModelManagerInterface
 } from './interfaces'
 
 export class LoaderManager implements LoaderManagerInterface {
   gltfLoader: GLTFLoader
   objLoader: OBJLoader
-  mtlLoader: MTLLoader
+  mtlLoader: OverrideMTLLoader
   fbxLoader: FBXLoader
   stlLoader: STLLoader
 
@@ -26,14 +27,21 @@ export class LoaderManager implements LoaderManagerInterface {
 
   constructor(
     modelManager: ModelManagerInterface,
-    eventManager: EventManagerInterface
+    eventManager: EventManagerInterface,
+    options: Load3DOptions
   ) {
+    let loadRootFolder = 'input'
+
+    if (options && options.inputSpec?.isPreview) {
+      loadRootFolder = 'output'
+    }
+
     this.modelManager = modelManager
     this.eventManager = eventManager
 
     this.gltfLoader = new GLTFLoader()
     this.objLoader = new OBJLoader()
-    this.mtlLoader = new MTLLoader()
+    this.mtlLoader = new OverrideMTLLoader(loadRootFolder)
     this.fbxLoader = new FBXLoader()
     this.stlLoader = new STLLoader()
   }
@@ -122,7 +130,8 @@ export class LoaderManager implements LoaderManagerInterface {
 
       case 'obj':
         if (this.modelManager.materialMode === 'original') {
-          const mtlUrl = url.replace(/\.obj([^.]*$)/, '.mtl$1')
+          const mtlUrl = url.replace(/(filename=.*?)\.obj/, '$1.mtl')
+
           try {
             const materials = await this.mtlLoader.loadAsync(mtlUrl)
             materials.preload()