修复包围盒计算的问题

src/2d/display/Container.ts

@@ -439,7 +439,7 @@ export default class Container extends DisplayObject {
 		this._lastBoundsID = this._boundsID
 		this._bounds.clear();
 		//算自己的
-		this._calculateBounds();
+		if(!this._calculateBounds()){
 			for (let i = 0; i < this.children.length; i++) {
 				const child = this.children[i];
 				if (!child.visible || !child.renderable) {
@@ -466,14 +466,13 @@ export default class Container extends DisplayObject {
 					Rectangle.createFromRects(this._bounds, child._bounds);
 				}
 			}
-
-
+		}
 	}
 
 	/**
 	 * 加"_"的方法基本是为了自己特殊处理
 	 */
-	protected _calculateBounds() {
+	protected _calculateBounds(): boolean {
 		//子类自己重写
 		//let wp = this.worldMatrix.transformPoint(this.x, this.y);
 
@@ -496,7 +495,10 @@ export default class Container extends DisplayObject {
 			matrix.transformPoint(rect.x + rect.width, rect.y + rect.height, DisplayObject._p3);
 			matrix.transformPoint(rect.x, rect.y + rect.height, DisplayObject._p4);
 			Rectangle.createFromPoints(this._bounds, DisplayObject._p1, DisplayObject._p2, DisplayObject._p3, DisplayObject._p4);
+
+			return true;
 		}
+		return false;
 	}
 
 	/**