GLPOLYGONOFFSETCLAMP(3G)        [FIXME: manual]       GLPOLYGONOFFSETCLAMP(3G)

NAME
       glPolygonOffsetClamp - set the scale, units and clamp used to calculate
       depth values

C SPECIFICATION
       void glPolygonOffsetClamp(GLfloat factor, GLfloat units,
                                 GLfloat clamp);

PARAMETERS
       factor
           Specifies a scale factor that is used to create a variable depth
           offset for each polygon. The initial value is 0.

       units
           Is multiplied by an implementation-specific value to create a
           constant depth offset. The initial value is 0.

       clamp
           Used to set a maximum or minimum value for the offset calculation.

DESCRIPTION
       When GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or
       GL_POLYGON_OFFSET_POINT is enabled, each fragment's depth value will be
       offset after it is interpolated from the depth values of the
       appropriate vertices. The offset is calculated as follows: o = { factor
       x DZ + r x units , clamp = 0 or NaN min ( factor x DZ + r x units ,
       clamp ) , clamp > 0 max ( factor x DZ + r x units , clamp ) , clamp < 0
       where DZ is a measurement of the change in depth relative to the screen
       area of the polygon, and r is the smallest value that is guaranteed to
       produce a resolvable offset for a given implementation. The offset is
       added before the depth test is performed and before the value is
       written into the depth buffer.

       glPolygonOffsetClamp is useful for rendering hidden-line images, for
       applying decals to surfaces, and for rendering solids with highlighted
       edges.

ASSOCIATED GETS
       glIsEnabled() with argument GL_POLYGON_OFFSET_FILL,
       GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT.

       glGet() with argument GL_POLYGON_OFFSET_FACTOR, GL_POLYGON_OFFSET_UNITS
       or POLYGON_OFFSET_CLAMP.

VERSION SUPPORT

       +---------------------+-----------------------------------------------------------------------------+
       |                     |                               OpenGL Version                                |
       +---------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
       |Function / Feature   | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6 |
       |Name                 |     |     |     |     |     |     |     |     |     |     |     |     |     |
       +---------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
       |glPolygonOffsetClamp |  -  |  -  |  -  |  -  |  -  |  -  |  -  |  -  |  -  |  -  |  -  |  -  | <?> |
       +---------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+

SEE ALSO
       glPolygonOffset(), glDepthFunc(), glEnable(), glGet(), glIsEnabled()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. Copyright (C) 2010-2014
       Khronos Group. This document is licensed under the SGI Free Software B
       License. For details, see
       https://khronos.org/registry/OpenGL-Refpages/LICENSES/LicenseRef-FreeB.txt.

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc.
       Copyright (C) 2010-2014 Khronos Group

[FIXME: source]                   03/14/2026          GLPOLYGONOFFSETCLAMP(3G)