GLPOLYGONMODE - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
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NAMEglPolygonMode − select a polygon rasterization mode
C SPECIFICATIONvoid glPolygonMode(GLenum face, GLenum mode);
PARAMETERSface Specifies the polygons that mode applies to. Must be GL_FRONT_AND_BACK for front− and back−facing polygons. mode 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.
DESCRIPTIONglPolygonMode 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: GL_POINT 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 effect. GL_LINE 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. GL_FILL The interior of the polygon is filled. Polygon attributes such as GL_POLYGON_SMOOTH control the rasterization of the polygon.
EXAMPLESTo draw a surface with outlined polygons, call glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
NOTESVertices 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.
ERRORSGL_INVALID_ENUM is generated if either face or mode is not an accepted value.
ASSOCIATED GETSglGet() with argument GL_POLYGON_MODE
VERSION SUPPORT OpenGL Version Function / Feature Name 2.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2.1 3.0 3.1 3.2 3.3 4.0 4.1 4.2 4.3 4.4 4.5 glPolygonMode ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
SEE ALSOglLineWidth(), glPointSize()
COPYRIGHTCopyright © 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/.
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Copyright © 1991-2006 Silicon Graphics, Inc.
Copyright © 2010-2014 Khronos Group
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