弹簧骨骼效果。 基于Unity2017.1。未在其他版本测试。 相关文章：http://www.cnblogs.com/yangrouchuan/p/7650115.html
Spring bone effect for Unity. Tested on Unity2017.1.
- One single script and all works!
- works with or without animator ( or anything changes rotation).
- physics based forces configuration.
Unity-chan asset from https://assetstore.unity.com/packages/3d/characters/unity-chan-model-18705