确定circle曲率

最小二乘法拟合圆

https://blog.csdn.net/liyuanbhu/article/details/50889951

 

圆上三点求圆心和半径

https://blog.csdn.net/lijiayu2015/article/details/52541730

 

三点确定一个圆的计算方法

https://blog.csdn.net/liyuanbhu/article/details/52891868

 

三点确定曲率

https://blog.csdn.net/Amych_/article/details/80209950