请教大佬们一个难点 - 根据轨迹让一张图的像素透明化

[2968267802 (怕被吃掉的软糖猿)]

我现在需要针在移动轨迹后，轨迹透明化，这是一张整图，我该怎么让移动轨迹透明化呢，有没有好的思路？

[1226085293 (muzzik(马赛克))]

Mask 的 GRAPHICS_STENCIL 模式试试

[380304468 (炒粉online)]

论坛搜一下挖孔shader

[2968267802 (怕被吃掉的软糖猿)]

可以，实现了

[2968267802 (怕被吃掉的软糖猿)]

public setTransparent(polygon : Array<cc.Vec2>){

    let graphics = this['_graphics'];

    graphics.lineCap = cc.Graphics.LineCap.ROUND;

    graphics.lineWidth = 10;

    graphics.lineJoin = cc.Graphics.LineJoin.ROUND;

    graphics.clear();

    for (let i = 0; i < polygon.length; i++) {

        if(i==0){

            graphics.moveTo(polygon[i].x,polygon[i].y)

        }else{

            graphics.lineTo(polygon[i].x,polygon[i].y)

        }

    }

    graphics.stroke();

}