What are the differences in these two types !!?!??!
glMatrixMode(GL_MODELVIEW);
glMatrixMode(GL_PROJECTION);
What are the differences in these two types !!?!??!
glMatrixMode(GL_MODELVIEW);
glMatrixMode(GL_PROJECTION);
This is something you must know so I recommend that you read the answer in the red book that can be donwloaded from gamedev.