Points

OpenGL OpenGL: Basic Coding
1

i need a way in OPenGl ONLY, not glut, to select a point in the screen and transform it into world coordinates…is there a way to do this?

2

Definitely, capture the appropriate mouse click event in your windowProc function and use OpenGL’s GL_SELECT render mode.

3

do a search on picking in this newsgroup

4

gluUnproject