glBegin, glCallList, glColor, glEdgeFlag, glEvalCoord, glFogCoord, glIndex, glMaterial, glMultiTexCoord, glNormal, glRect, glTexCoord, glVertexPointer
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/.
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glVertex: man2/glVertex.xml
glVertex commands are used within glBegin / glEnd pairs to specify point, line, and polygon vertices. The current color, normal, texture coordinates, and fog coordinate are associated with the vertex when glVertex is called. When only x and y are specified, z defaults to 0 and w defaults to 1. When x, y, and z are specified, w defaults to 1.
Invoking glVertex outside of a glBegin / glEnd pair results in undefined behavior.