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GLPOLYGONMODE(3G) OpenGL Manual GLPOLYGONMODE(3G)
glPolygonMode - select a polygon rasterization mode
void glPolygonMode(GLenum face, GLenum mode);
Specifies the polygons that mode applies to. Must be GL_FRONT_AND_BACK for front- and
Specifies how polygons will be rasterized. Accepted values are GL_POINT, GL_LINE, and
GL_FILL. The initial value is GL_FILL for both front- and back-facing polygons.
glPolygonMode controls the interpretation of polygons for rasterization. face describes
which polygons mode applies to: both front and back-facing polygons (GL_FRONT_AND_BACK).
The polygon mode affects only the final rasterization of polygons. In particular, a
polygon's vertices are lit and the polygon is clipped and possibly culled before these
modes are applied.
Three modes are defined and can be specified in mode:
Polygon vertices that are marked as the start of a boundary edge are drawn as points.
Point attributes such as GL_POINT_SIZE and GL_POINT_SMOOTH control the rasterization
of the points. Polygon rasterization attributes other than GL_POLYGON_MODE have no
Boundary edges of the polygon are drawn as line segments. Line attributes such as
GL_LINE_WIDTH and GL_LINE_SMOOTH control the rasterization of the lines. Polygon
rasterization attributes other than GL_POLYGON_MODE have no effect.
The interior of the polygon is filled. Polygon attributes such as GL_POLYGON_SMOOTH
control the rasterization of the polygon.
To draw a surface with outlined polygons, call
Vertices are marked as boundary or nonboundary with an edge flag. Edge flags are generated
internally by the GL when it decomposes triangle stips and fans.
GL_INVALID_ENUM is generated if either face or mode is not an accepted value.
glGet() with argument GL_POLYGON_MODE
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/.
opengl.org 06/10/2014 GLPOLYGONMODE(3G)
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