避免临时编辑器错误的提前销毁对象

src/Editor/TempEditor.ts

@@ -50,7 +50,6 @@ export class TempEditor
         app.Viewer.Scene.add(app.Viewer.GripScene);
         app.Viewer.OutlinePass.selectedObjects.length = 0;
         app.Viewer.OutlinePass.renderObjects.length = 0;
-        DisposeThreeObj(this.editorScene);
 
         let showLog = HostApplicationServices.ShowHistoryLog;
         HostApplicationServices.ShowHistoryLog = false;
@@ -58,6 +57,8 @@ export class TempEditor
         while (app.Database.hm.curIndex !== this.hmIndex)
             app.Database.hm.Undo();
 
+        DisposeThreeObj(this.editorScene);
+
         app.Database.hm.StartCmd("");
         app.Database.hm.EndCmd();
         HostApplicationServices.ShowHistoryLog = showLog;