onTouchMove(e:cc.Event.EventTouch){

         // e.getLocation() 为点击的位置，是世界坐标
        // 需要把世界坐标转换为本地坐标
        
        let parent=this.node.parent;// 父节点 (圆形底盘)
        let pos:cc.Vec2=parent.convertToNodeSpaceAR(e.getLocation());
        this.node.setPosition(pos);

    }

    onTouchCancel(){
      this.node.setPosition(cc.v3(0,0,0));
    }

let parent=this.node.parent;// 父节点 (圆形底盘)
let pos:cc.Vec2=parent.convertToNodeSpaceAR(e.getLocation());
// 该点所在的方位 (cos, sin)
let direction:cc.Vec2=pos.normalize();
// 限制在边界之内
let maxR = 100-20;   
//点击的点到托盘中央的距离
let r : number = cc.Vec2.distance(pos, cc.v2(0,0));

if( r > maxR)
{
	pos.x = maxR * direction.x; 
	pos.y = maxR * direction.y;
}
// cc.LOG("相对位置: " + pos.x + ", " + pos.y);
this.node.setPosition( pos);

onLoad () {
     this.car=cc.find("Canvas/小车");
}

let radian=pos.signAngle(cc.v2(1,0));//计算点击位置与水平的夹角
let ang=radian/Math.PI*180;//弧度制转换为角度值
this.car.angle=-ang;//逆时针为正，所以这里要调整至顺时针

direction: cc.Vec2 = null;
sPEed: number = 3;

onLoad() {

}

start() {

}

update(dt) {
	if (this.direction == null) return; //静止
	let dx = this.speed * this.direction.x;
	let dy = this.speed * this.direction.y;

	let pos = this.node.getPosition();
	pos.x += dx;
	pos.y += dy;
	this.node.setPosition(pos);
}

car: cc.Node = null;
carscript: cc.component = null;
// LIFE-CYCLE CALLBACKS:

onLoad() {
	this.car = cc.find("Canvas/小车");
	this.carscript = this.car.getComponent("CarMove");
}

start() {
	this.node.on('touchstart', this.onTouchStart, this);
	this.node.on('touchmove', this.onTouchMove, this);
	this.node.on('touchend', this.onTouchCancel, this);
	this.node.on('touchcancel', this.onTouchCancel, this);
}

onTouchStart() {

}

onTouchMove(e: cc.Event.EventTouch) {

	// e.getLocation() 为点击的位置，是世界坐标
	// 需要把世界坐标转换为本地坐标

	// let parent=this.node.parent;// 父节点 (圆形底盘)
	// let pos:cc.Vec2=parent.convertToNodeSpaceAR(e.getLocation());
	// this.node.setPosition(pos);

	let parent = this.node.parent; // 父节点 (圆形底盘)
	let pos: cc.Vec2 = parent.convertToNodeSpaceAR(e.getLocation());
	// 该点所在的方位 (cos, sin)
	let direction: cc.Vec2 = pos.normalize();
	// 限制在边界之内
	let maxR = 100 - 20;

	let r: number = cc.Vec2.distance(pos, cc.v2(0, 0));

	if (r > maxR) {
		pos.x = maxR * direction.x;
		pos.y = maxR * direction.y;
	}
	// cc.log("相对位置: " + pos.x + ", " + pos.y);
	this.node.setPosition(pos);

	let radian = pos.signAngle(cc.v2(1, 0)); //计算点击位置与水平的夹角
	let ang = radian / Math.PI * 180; //弧度制转换为角度值
	this.car.angle = -ang; //逆时针为正，所以这里要调整至顺时针

	this.carscript.direction = direction;

}

onTouchCancel() {
	this.node.setPosition(cc.v3(0, 0, 0));
	//将方向置空，使汽车停止
	this.carscript.direction = null;

}
// update (dt) {}