修复:复合实体矩形灯拷贝错误

src/DatabaseServices/Lights/RectAreaLightHelper.ts

@@ -69,6 +69,13 @@ export class RectAreaLightHelper extends Line
         this.add(new Mesh(geometry2, new MeshBasicMaterial({ side: BackSide, fog: false, transparent: true, opacity: 0.8 })));
     }
 
+    copy(source: this, recursive?: boolean): this
+    {
+        this.light = source.light.clone();
+        this.color = source.color.clone();
+        return super.copy(source, recursive);
+    }
+
     updateMatrixWorld()
     {
         this.scale.set(0.5 * this.light.width, 0.5 * this.light.height, 1);