如何使用ＶＴＫ在一个窗口中显示一个锥体，把鼠标放置于窗口中，移动鼠标就可以控制锥体绕其重心旋转-how to use a window in a show of MERCOSUR, and the mouse placed on the window, Mobile mouse on the control Cone rotation around its center of gravity