centos man page for gluunproject

GLUUNPROJECT(3G)						   OpenGL Manual						  GLUUNPROJECT(3G)

NAME
       gluUnProject - map window coordinates to object coordinates

C SPECIFICATION
       GLint gluUnProject(GLdouble winX, GLdouble winY, GLdouble winZ, const GLdouble * model, const GLdouble * proj, const GLint * view,
			  GLdouble* objX, GLdouble* objY, GLdouble* objZ);

PARAMETERS
       winX, winY, winZ
	   Specify the window coordinates to be mapped.

       model
	   Specifies the modelview matrix (as from a glGetDoublev() call).

       proj
	   Specifies the projection matrix (as from a glGetDoublev() call).

       view
	   Specifies the viewport (as from a glGetIntegerv() call).

       objX, objY, objZ
	   Returns the computed object coordinates.

DESCRIPTION
       gluUnProject maps the specified window coordinates into object coordinates using model, proj, and view. The result is stored in objX, objY,
       and objZ. A return value of GLU_TRUE indicates success; a return value of GLU_FALSE indicates failure.

       To compute the coordinates objX objY objZ, gluUnProject multiplies the normalized device coordinates by the inverse of model * proj as
       follows:

       objX objY objZ W = INV  P  M  2	winX - view  0 view  2 - 1 2  winY - view  1 view  3 - 1 2  winZ - 1 1INV denotes matrix inversion. W is
       an unused variable, included for consistent matrix notation.

SEE ALSO
       gluProject(), glGet()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org							    06/10/2014							  GLUUNPROJECT(3G)