I want to accurately calculate the normal vector of a point on the shell from a stp file.
I searched this forum, and for doing it everyone seems to convert the shell from a stp file to the faces at first.
But, in my limited experience, converting the shell to the face(s) reduces topological accuracy and accurate normal vectors cannot be obtained.
Does anyone know how to get normal vectors accurately without converting the shell to the face(s).
Thanks in advance :D