skelly:骨架动画和IK条板箱 源码

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 (Vector3 :: z (). into (), leg); let left_shoulder = skelly. attach (Vector3 :: z (). into (), waist); let left_arm = skelly. attach (( - Vect