Hello,

I would like to compute a quantity of the form atan2(N.y,N.x) on the boundary. I need to store this and use it multiple times in my code. (It allows me to find a reverse parametrization…)

Can you suggest a way to do this? Is it possible to recover the normal vector at a point of the boundary (without recomputing it)?

Thank you.

Best regards,

Beniamin