1991-2006
Silicon Graphics, Inc.
2010-2014
Khronos Group
glDepthRangef
3G

# glDepthRangef

specify mapping of depth values from normalized device coordinates to window coordinates

## C Specification

                    void glDepthRangef
                    GLfloat n
                    GLfloat f

## Parameters

`n`

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

`f`

  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. `glDepthRangef` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates. If a fixed-point depth representation is used, the parameters `n` and `f` are clamped to the range [0 to 1] when computing window z.

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 `n` be less than `f`. Reverse mappings such as n = 1 , and f = 0 are acceptable.

## Associated Gets

glGet with argument `GL_DEPTH_RANGE`

## API Version Support

glDepthRangef

## See Also

glDepthFunc, glPolygonOffset, glViewport

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.