[0]提供一种思路实现Camera2D 类似cocoscreator的功能

export class Camera2D extends Laya.Sprite {
    private onesp:Laya.Sprite=new Laya.Sprite();
    private two:Laya.Sprite = new Laya.Sprite();
    private rendertarget:Laya.RenderTexture2D =new Laya.RenderTexture2D(300,300, 1, -1);
    private tex:Laya.Texture;
    constructor() {
        super();
        this.tex = Laya.Loader.getRes("res/atlas/comp.png");
        this.onesp.graphics.drawTexture(this.tex,0,0,300,300);
        // Laya.Stat.show();
        Laya.stage.addChild(this.onesp);
        this.tex =this.onesp.drawToTexture(100,100,0,0,this.rendertarget) as any;
        this.two.texture = new Laya.Texture(this.tex,Laya.Texture.INV_UV);
        Laya.timer.loop(10,this,this.updateCamera)
        // two.graphics.drawRect(100,100,100,100,"#ff0000")
        this.two.x =this.two.y =300;
        Laya.stage.addChild(this.two);
    }
    public updateCamera(){
        this.onesp.rotation+=1
        // two.graphics.clear();
        // texx.disposeBitmap();
        var texx =this.onesp.drawToTexture(100,100,0,0,this.rendertarget) as any;
        this.two.texture.bitmap =texx;
    }
}