robot return to origin position 机器人返回迎宾点
So, the position of this point, p, is going to be the same as OP knowing the vector OP from the origin to this moving point.
点p的位置就是,从原点指向这个运动点的向量。
Remember that you must change your arithmetic when the page is shown in Internet Explorer from right to left, such as by adjusting the position of the element by the offset of the origin.
请记住,当页面在 Internet Explorer 中从右到左显示时,必须修改算法,比如按照原点的偏移量调整元素的位置。
The setup function creates the display window and initializes the starting position of the box (the origin).
setup函数创建显示窗口,并初始化了立方体的开始位置(起点)。
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