Source position: glu.pp line 398
var gluUnProject: function(
winX: GLdouble;
winY: GLdouble;
winZ: GLdouble;
model: PGLdouble;
proj: PGLdouble;
view: PGLint;
objX: PGLdouble;
objY: PGLdouble;
objZ: PGLdouble
):GLint;