How to detect bend in a spline or strait part of spline at position

[SAMYTHEBIGJUICY]

Hi
TF is not proportional to distance. More about this here: https://www.youtube.com/watch?v=rP0zuAEoVJw
It would be best to use GetTangentByDistance
The way you compute the angle is invalid in a lot of cases. You can use Unity's Vector3.Angle, or a custom method if Unity's method is not precise enough.

Thanks so much for the tip! I'm now using this which seems to be working much better: 

                float mTFDistance = Spline.TFToDistance(mTF, CurvyClamping.Clamp);

                Vector3 Cornernow = Spline.GetTangentByDistance(mTFDistance);
                Vector3 Cornercomingup = Spline.GetTangentByDistance(mTFDistance + 0.5f);

                float leanangle = Vector3.SignedAngle(Cornernow, Cornercomingup, Vector3.up);

                Debug.Log("lean angle " + leanangle);