Angle detection by tangent

[_Aka_]

Hi,

Is your project anything like Micro Machines? It looks cool, and I would like to learn more about it.

Regarding your code, there might be different sources for the issue:

1. I would recommend using Vector3.Project to project vectors instead of manipulating their individual components. You can project your vectors on plane which normal is the spline's orientation, given by CurvySpline.GetOrientationUpFast
   
2. Vector3.Angle returns an unsigned angle; you might want to use Vector3.SignedAngle a signed one.
   
3. Know that the GetTangent and GetOrientationUpFast methods have an optional parameter allowing you to retrieve the tangents either in local space or global space.
   

With this information, I hope that you will be able to debug your code. If needed feel free to ask for more clarification.
Have a nice day