- recast源码
- collinear判断是否共线
参考 :https://blog.csdn.net/hjssss/article/details/86539343
https://blog.csdn.net/hjssss/article/details/86589828
- 存在的两种情况
参考 :https://blog.csdn.net/hjssss/article/details/86539343
https://blog.csdn.net/hjssss/article/details/86589828