cocos2d-js箭贝塞尔曲线效果

var jian = new cc.Sprite("#images/gongjianshou/jian.png");
        jian.attr({
            x: this.x,
            y: this.y + 100,
            scaleY: this.scaleY,
            scaleX: -Math.abs(this.scaleX)
        });
        jian.setName('jian');
        this.parent.addChild(jian, 30);

        //抛物线飞行
        var sx = jian.x; //开始位置x
        var sy = jian.y; //开始位置y
        var ex = target.x + 40; //结束位置x
        var ey = target.y + 150; //结束位置y
        var startA = this.scaleX > 0 ? 130 : 40; //起始角度
        var endA = this.scaleX > 0 ? 220 : -40; //终止角度
        var dirTime = 1; //起始位置到中止位置的所需时间
        //设置精灵的起始角度
        jian.setRotation(startA);

        var bezier = [
            cc.p(sx, sy),
            cc.p(sx + (ex - sx) * 0.5, sy + (ey - sy) * 0.5 + 500),
            cc.p(ex, ey)
        ];
        //移动
        var actionMove = new cc.BezierTo(dirTime, bezier);
        //旋转角度
        var actionRotate = new cc.RotateTo(dirTime, endA);
        //合并动作
        var actions = new cc.Spawn([actionMove, actionRotate]);
        var seq = cc.sequence(actions,
            cc.callFunc(function () {
                jian.removeFromParent();
            })
        );
        jian.runAction(seq);