cocos creator滚动渲染优化

    //滚动优化
    RollingOptimization:function (view,list) {
        let viewPos = view.parent.convertToWorldSpaceAR(view.getPosition());
        let viewBox = cc.rect(viewPos.x-view.width/2,viewPos.y-view.height/2,view.width,view.height);
        cc.log(viewBox)
        for (let i = 0; i < list.length; i++) {
            if (viewBox.intersects(list[i].getBoundingBoxToWorld())) {
                list[i].opacity = 255;
                cc.log("255",i)
            } else {
                list[i].opacity = 0;
                cc.log("0",i)
            }
        }
    },