Doing Calculations

Is there some built in way to calculate areas, lengths, radius of curvature, etc. of a shape that has been rendered on the screen using OpenGL? I’ve drawn a 2D oval type shape from random coordinates which I scanned from another file. And I need to calculate those things I mentioned above.

Nope (GL == Graphics Library, not Math Library).

I’d recommend to build a math library yourself or just pick a good one from the COTD @ flipCode and use those functions to do calculations.

opengl draws points,lines,triangles.
it can draw textures on it…