gluUnProject Interface to
OpenGL function gluUnProject
usage: [ objX, objY, objZ, r ] = gluUnProject( winX, winY, winZ, model, proj, view )
C function: GLint gluUnProject(GLdouble winX, GLdouble winY, GLdouble winZ, const GLdouble* model, const GLdouble* proj, const GLint* view, GLdouble* objX, GLdouble* objY, GLdouble* objZ)
Psychtoolbox/PsychOpenGL/MOGL/wrap/gluUnProject.m