[]加了两个遮罩后的动画，帧频只有10了，有demo，有项目，有源码

class GameMain{

    constructor()

    {     

        Laya.init(1920,950,Laya.WebGL);

        Laya.Stat.show();



        const container = new Laya.Sprite();

        Laya.stage.addChild(container);        



        const mask = new Laya.Sprite();        

        mask.graphics.drawPoly(0, 0, [0, 0, 484, 0, 1483, 950, 0, 950], '#ff0000');

        // container.addChild(mask);

        container.mask = mask;



        const ani = new Laya.Animation();

        container.addChild(ani);

        ani.loadAtlas('1.json');

        ani.play();

        ani.pos(300,0);



        const d1 = 484;

        const d2 = 1438;

        const d3 = 950;

        const d4 = 1920;



        const container2 = new Laya.Sprite();

        Laya.stage.addChild(container2);        



        const mask2 = new Laya.Sprite();        

        mask2.graphics.drawPoly(d1, 0, [0, 0, d4 - d1, 0, d4 - d1, d3, d4 - d1 - d1, d3], '#00ff00');

        // container2.addChild(mask2);

        container2.mask = mask2;



        const ani2 = new Laya.Animation();

        container2.addChild(ani2);

        ani2.loadAtlas('1.json');

        ani2.play();

        ani2.pos(948,479);

        

        

    }

}

new GameMain();