二次贝塞尔曲线算法。 点击物品根据鼠标点击的坐标以及，目标点的坐标，计算出控制点的坐标。 根据三个点返回一组坐标点，每一个点代表下一帧物体的坐标。 根据坐标点绘制刷新视图更新位置，实现曲线效果。
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jizhishaonian emaiqi fangming666 maogirlsqueen qfz9527 wjygamedev sunshey rongfox wuqueshan mrzhangxin cigua anstall qingchengwait changxuexu 112liyao xiangbin0712 pancakeze aths calmsboyflybus's Issues
右边那一列动画执行没左边一列好
右边那一排动画执行没左边一列好, 点击右边的产品的时候的加入效果飘出去右边那里,感觉像是飘到第三列的样子
发现两个小bug
1、多次点击会报错。
解决办法：在执行startAnimation之前先判断上次的动画是否执行完毕，如果没有则不执行这个动画。
2、第三个点的横坐标x计算有误
解决办法： 应该取前两个点横坐标和的1/2，而不是差的1/2.
bug
购物车 在屏幕左下角 怎么修改动画啊
当点击位置在购物车右边，动画有问题
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