i need to create a perspective, top orthographic, and
front orthographic view of my object.
but when i try glperspective i just get a black screen. changing
the fov and the near and far parameters doesn’t help. what should i do?
also how do i create a top orthographic view and front orthographic view, i know i should glortho, but what parameters
are changed. so i use glulookat to achieve this?