glShadeModel man page on RedHat

Man page or keyword search:  
man Server   29550 pages
apropos Keyword Search (all sections)
Output format
RedHat logo
[printable version]

GLSHADEMODEL(3G)		 OpenGL Manual		      GLSHADEMODEL(3G)

NAME
       glShadeModel - select flat or smooth shading

C SPECIFICATION
       void glShadeModel(GLenum mode);

PARAMETERS
       mode
	   Specifies a symbolic value representing a shading technique.
	   Accepted values are GL_FLAT and GL_SMOOTH. The initial value is
	   GL_SMOOTH.

DESCRIPTION
       GL primitives can have either flat or smooth shading. Smooth shading,
       the default, causes the computed colors of vertices to be interpolated
       as the primitive is rasterized, typically assigning different colors to
       each resulting pixel fragment. Flat shading selects the computed color
       of just one vertex and assigns it to all the pixel fragments generated
       by rasterizing a single primitive. In either case, the computed color
       of a vertex is the result of lighting if lighting is enabled, or it is
       the current color at the time the vertex was specified if lighting is
       disabled.

       Flat and smooth shading are indistinguishable for points. Starting when
       glBegin() is issued and counting vertices and primitives from 1, the GL
       gives each flat-shaded line segment i the computed color of vertex i +
       1, its second vertex. Counting similarly from 1, the GL gives each
       flat-shaded polygon the computed color of the vertex listed in the
       following table. This is the last vertex to specify the polygon in all
       cases except single polygons, where the first vertex specifies the
       flat-shaded color.

       ┌───────────────────────────────────┬───────────────────────────────────┐
       │				   │				       │
       │			Primitive  │			      Vertex   │
       │Type of Polygon			   │				       │
       │			i	   │				       │
       │				   │				       │
       ├───────────────────────────────────┼───────────────────────────────────┤
       │Single polygon			   │		     1		       │
       │			(	   │				       │
       │				   │				       │
       │				   │				       │
       │				i  │				       │
       │				== │				       │
       │				1  │				       │
       │				   │				       │
       │			)	   │				       │
       ├───────────────────────────────────┼───────────────────────────────────┤
       │Triangle strip			   │ i				       │
       │				   │				     + │
       │				   │				     2 │
       ├───────────────────────────────────┼───────────────────────────────────┤
       │Triangle fan			   │ i				       │
       │				   │				     + │
       │				   │				     2 │
       ├───────────────────────────────────┼───────────────────────────────────┤
       │Independent triangle		   │ 3				       │
       │				   │				     ⁢ │
       │				   │				     i │
       ├───────────────────────────────────┼───────────────────────────────────┤
       │Quad strip			   │ 2				       │
       │				   │				     ⁢ │
       │				   │				     i │
       │				   │				     + │
       │				   │				     2 │
       ├───────────────────────────────────┼───────────────────────────────────┤
       │Independent quad		   │ 4				       │
       │				   │				     ⁢ │
       │				   │				     i │
       └───────────────────────────────────┴───────────────────────────────────┘

       Flat and smooth shading are specified by glShadeModel with mode set to
       GL_FLAT and GL_SMOOTH, respectively.

ERRORS
       GL_INVALID_ENUM is generated if mode is any value other than GL_FLAT or
       GL_SMOOTH.

       GL_INVALID_OPERATION is generated if glShadeModel is executed between
       the execution of glBegin() and the corresponding execution of glEnd().

ASSOCIATED GETS
       glGet() with argument GL_SHADE_MODEL

SEE ALSO
       glBegin(), glColor(), glLight(), glLightModel()

COPYRIGHT
       Copyright © 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			  03/16/2013		      GLSHADEMODEL(3G)
[top]

List of man pages available for RedHat

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net