Translate without affecting perspective
I'm putting together a simple visualization program using the fixed pipeline (I'm aware that it has been deprecated, but I need this to work on very old computers that may not have capable graphics cards).
I'm drawing the main object of interest in the center, using a perspective projection calculated using glFrustum, and I would like to draw a set of axes in the corner.
Problem is, I can't seem to think of a way to get it to appear using the same perspective projection (as if it were in the center) but translated to the corner. Any ideas?
Thanks in advance.