优化:避免光标丢帧

src/GraphicsSystem/PreViewer.ts

@@ -16,7 +16,8 @@ export enum DrawMode
 
 export class PreViewer
 {
-    private _bNeedUpdate: boolean;
+    //现在我们移动一次鼠标,为后面的3帧都进行渲染,避免某些情况下丢帧
+    private _NeedRenderCount = 3;
     //渲染器
     private _Render: WebGLRenderer;
     //场景
@@ -73,15 +74,15 @@ export class PreViewer
     get Camera() { return this._Camera.Camera; }
     UpdateScreen()
     {
-        this._bNeedUpdate = true;
+        this._NeedRenderCount = 3;
     }
     StartRender = () =>
     {
         requestAnimationFrame(this.StartRender);
-        if (this._Scene != null && this._bNeedUpdate)
+        if (this._Scene != null && this._NeedRenderCount > 0)
         {
             this.Render();
-            this._bNeedUpdate = false;
+            this._NeedRenderCount--;
         }
     };
     Render()