二次曲面拟合非常棒:
https://blog.youkuaiyun.com/Haipai1998/article/details/85345823
https://blog.youkuaiyun.com/weixin_44112790/article/details/89287521
python学习—画3d曲线曲面图
https://blog.youkuaiyun.com/qq5q13638/article/details/78398997
https://blog.youkuaiyun.com/eddy_zheng/article/details/48713449
NURBS-Python 官方:
https://nurbs-python.readthedocs.io/en/latest/install.html#