glFrustum Interface to
OpenGL function glFrustum
usage: glFrustum( left, right, bottom, top, zNear, zFar )
C function: void glFrustum(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar)
Psychtoolbox/PsychOpenGL/MOGL/wrap/glFrustum.m