debian man page for glpolygonoffset

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

NAME
       glPolygonOffset - set the scale and units used to calculate depth values

C SPECIFICATION
       void glPolygonOffset(GLfloat factor, GLfloat units);

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.

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 value of the offset is factor x DZ + r x units, 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.

       glPolygonOffset 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 or GL_POLYGON_OFFSET_UNITS.

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

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/.

[FIXME: source] 						    05/30/2012						       GLPOLYGONOFFSET(3G)