export default class SKDrawUtil{
    static drawDashLine(node:cc.Node,start:cc.Vec2,end:cc.Vec2,color:cc.Color=cc.Color.RED,lineWidth:number=5,dashLength:number=10,dashSpace:number=5){
        let graphics=node.getComponent(cc.Graphics);
        if(!graphics){
            graphics=node.addComponent(cc.Graphics);
        }
        graphics.clear();
        graphics.strokeColor=color;
        graphics.lineWidth=lineWidth;
        let lineLength=end.sub(start).mag();
        let current=start.clone();
        let normalize=end.sub(start).normalize();
        let dash=normalize.mul(10);
        let space=normalize.mul(5);
        let unitLength=dashLength+dashSpace;
        for(;lineLength>unitLength;lineLength-=unitLength){
            graphics.moveTo(current.x,current.y);
            current.addSelf(dash);
            graphics.lineTo(current.x,current.y);
            graphics.stroke();
            current.addSelf(space);
        }
        graphics.moveTo(current.x,current.y);
        graphics.lineTo(end.x,end.y);
        graphics.stroke();
    }
}