%mathent; ]> 1991-2006 Silicon Graphics, Inc. 2010-2013 Khronos Group glPolygonMode 3G glPolygonMode select a polygon rasterization mode void glPolygonMode GLenum face GLenum mode face 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. 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: 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. To draw a surface with outlined polygons, call glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); 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 glLineWidth, glPointSize Copyright 1991-2006 Silicon Graphics, Inc. Copyright 2010-2013 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.