fix: ._engine has been deleted

packages/custom-material/src/bake-pbr/BakePBRMaterial.ts

@@ -49,7 +49,7 @@ export class BakePBRMaterial extends PBRMaterial {
   }
 
   override clone(): BakePBRMaterial {
-    const dest = new BakePBRMaterial(this._engine);
+    const dest = new BakePBRMaterial(this.engine);
     this.cloneTo(dest);
     return dest;
   }

packages/custom-material/src/plain-color/PlainColorMaterial.ts

@@ -35,7 +35,7 @@ export class PlainColorMaterial extends BaseMaterial {
   }
 
   override clone(): PlainColorMaterial {
-    const dest = new PlainColorMaterial(this._engine);
+    const dest = new PlainColorMaterial(this.engine);
     this.cloneTo(dest);
     return dest;
   }

packages/gizmo/src/icon/Icon.ts

@@ -72,7 +72,7 @@ export class Icon extends Script {
 
   constructor(entity: Entity) {
     super(entity);
-    const engine = this._engine;
+    const engine = this.engine;
     const meshRenderer = entity.addComponent(MeshRenderer);
     this._renderer = meshRenderer;
     //  2 ---- 3

packages/gizmo/src/icon/IconMaterial.ts

@@ -45,7 +45,7 @@ export class IconMaterial extends BaseMaterial {
   }
 
   override clone(): IconMaterial {
-    const dest = new IconMaterial(this._engine);
+    const dest = new IconMaterial(this.engine);
     this.cloneTo(dest);
     return dest;
   }

packages/stats/src/Core.ts

@@ -1,7 +1,6 @@
 import { Engine } from "@galacean/engine";
 import DrawCallHook from "./hooks/DrawCallHook";
 
-
 declare global {
   interface Performance {
     memory: any;

packages/stats/src/Monitor.ts

@@ -66,7 +66,16 @@ export default class Monitor {
   constructor(engine: Engine) {
     this.core = new Core(engine);
     this.items = [];
-    this.items = ["fps", "memory", "totalGraphicsMemory", "textureMemory", "bufferMemory", "drawCall", "triangles", "webglContext"];
+    this.items = [
+      "fps",
+      "memory",
+      "totalGraphicsMemory",
+      "textureMemory",
+      "bufferMemory",
+      "drawCall",
+      "triangles",
+      "webglContext"
+    ];
     this.createContainer();
     this.update = this.update.bind(this);
   }

packages/xr/src/trackable/XRTrackedObjectManager.ts

@@ -54,7 +54,7 @@ export abstract class XRTrackedObjectManager<T extends XRTracked> extends Script
         this._initXRFeature();
         break;
       case XRSessionState.Initialized:
-        const feature = this._engine.xrManager.getFeature(this._feature);
+        const feature = this.engine.xrManager.getFeature(this._feature);
         if (feature) {
           feature.addChangedListener(this._onTrackedChanged);
         } else {
@@ -113,7 +113,7 @@ export abstract class XRTrackedObjectManager<T extends XRTracked> extends Script
   }
 
   private _createTrackedComponents(sessionRelativeData: T): TrackedComponent<T> {
-    const { origin } = this._engine.xrManager;
+    const { origin } = this.engine.xrManager;
     const { prefab } = this;
     let entity: Entity;
     if (!prefab) {