Unix/Linux Go Back    


CentOS 7.0 - man page for gldepthrange (centos section 3G)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


GLDEPTHRANGE(3G)			  OpenGL Manual 			 GLDEPTHRANGE(3G)

NAME
       glDepthRange - specify mapping of depth values from normalized device coordinates to
       window coordinates

C SPECIFICATION
       void glDepthRange(GLdouble nearVal, GLdouble farVal);

       void glDepthRangef(GLfloat nearVal, GLfloat farVal);

PARAMETERS
       nearVal
	   Specifies the mapping of the near clipping plane to window coordinates. The initial
	   value is 0.

       farVal
	   Specifies the mapping of the far clipping plane to window coordinates. The initial
	   value is 1.

DESCRIPTION
       After clipping and division by w, depth coordinates range from -1 to 1, corresponding to
       the near and far clipping planes.  glDepthRange specifies a linear mapping of the
       normalized depth coordinates in this range to window depth coordinates. Regardless of the
       actual depth buffer implementation, window coordinate depth values are treated as though
       they range from 0 through 1 (like color components). Thus, the values accepted by
       glDepthRange are both clamped to this range before they are accepted.

       The setting of (0,1) maps the near plane to 0 and the far plane to 1. With this mapping,
       the depth buffer range is fully utilized.

NOTES
       It is not necessary that nearVal be less than farVal. Reverse mappings such as nearVal =
       1, and farVal = 0 are acceptable.

       The type of the nearVal and farVal parameters was changed from GLclampf to GLfloat for
       glDepthRangef and from GLclampd to GLdouble for glDepthRange. This change is transparent
       to user code and is described in detail on the removedTypes() page.

ASSOCIATED GETS
       glGet() with argument GL_DEPTH_RANGE

SEE ALSO
       glDepthFunc(), glPolygonOffset(), glViewport(), removedTypes()

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				 GLDEPTHRANGE(3G)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 05:06 PM.