Descr iption These functions implements the basic snake segmentation contour, as introduced by Kass et al. Algorithm: A snake is an active (moving) contour, in which the points are attracted by edges and other image boundaries. To keep the contour s
斯凯利
制作骨架动画的箱子。
（可选）提供反向运动学功能。
例子
// build a skelly with leg and two arms.
let mut skelly = Skelly :: :: new ();
let foot = skelly. add_root (Point3 :: origin ());
let leg = skelly. attach (Vector3 :: z (). into (), foot);
let waist = skelly. attach
