How to parametrize with arc length a curve on a surface?
I want to calculate the unit tangent vector to a parametrized curve in space on a surface along an interval and to do so I believe I need to integrate along the parameter t to get a secondary parameter s that allows me to normalize the tangent vectors. This is explain at the beginning of this video.
I am attaching the beginning of the non-functioning ggb code.
The ultimate goal is to get the tangent vector at each point, as well as the normal vector to the curve as in this question.