cocos creator + TypeScript achieve scratch effect

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1 Introduction

  Here to share a scratch card effect, without further ado, Syria, we directly on the code.

2, set up the scene

  As shown in FIG scene structures:

3, code section

  Detailed code as follows:

const {ccclass, property} = cc._decorator;

@ccclass
export default class test extends cc.Component {
    
    // LIFE-CYCLE CALLBACKS:
    
    mask = null;
    onLoad () { 
        this.mask = this.node.getChildByName('mask').getComponent(cc.Mask);
        this.node.on(cc.Node.EventType.TOUCH_START,function (e){
            console.log('touch start'); 
            this.commonFunc(e)
        },this);

        this.node.on(cc.Node.EventType.TOUCH_MOVE,(e)=>{
            console.log('touch move'); 
            this.commonFunc(e) 
        },this);
    }

    start () {

    }

    commonFunc (event){
        let point:cc.Vec2 = event.touch.getLocation();
        point = this.node.convertToNodeSpaceAR(point);
        this._addCircle(point);
    }

    _addCircle(point) {
        let graphics = this.mask._graphics;
        console.log("xxxx:",graphics)
        let color = cc.color(0, 0, 0, 255);
        graphics.rect(point.x,point.y,50,40)
        graphics.lineWidth = 2
        graphics.fillColor = color
        //graphics.strokeColor = color
        graphics.fill()
    }

    // update (dt) {}
}

4, showing the effect of

  Here we start the project, take a look at the demonstration effect!

5, Demo Download

  In order to facilitate the use of this given directly download link, click here to download the complete project.

6. Conclusion

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The End
  Well, today's share on here, if inadequacies also hope you correct me in time, feel free to discuss the exchange! ! !

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