glEdgeFlag man page on DigitalUNIX

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glEdgeFlag(3G)							glEdgeFlag(3G)

NAME
       glEdgeFlag,  glEdgeFlagv - option edges as either boundary or nonbound‐
       ary

SYNOPSIS
       void glEdgeFlagv(
	       const GLboolean *option );

PARAMETERS
       Specifies a pointer to an array that contains a single boolean element,
       which replaces the current edge option value.

DESCRIPTION
       Each  vertex of a polygon, separate triangle, or separate quadrilateral
       specified between a glBegin()/glEnd() pair is marked as	the  start  of
       either  a  boundary  or nonboundary edge. If the current edge option is
       true when the vertex is specified, the vertex is marked as the start of
       a boundary edge. Otherwise, the vertex is marked as the start of a non‐
       boundary edge.  glEdgeFlag() sets the edge option  bit  to  GL_TRUE  if
       option is GL_TRUE, and to GL_FALSE otherwise.

       The  vertices  of  connected triangles and connected quadrilaterals are
       always marked as boundary, regardless of the value of the edge option.

       Boundary and nonboundary edge options on vertices are significant  only
       if GL_POLYGON_MODE is set to GL_POINT or GL_LINE. See glPolygonMode().

NOTES
       The  current  edge  option  can	be updated at any time. In particular,
       glEdgeFlag() can be called between a call to glBegin() and  the	corre‐
       sponding call to glEnd().

ASSOCIATED GETS
       glGet() with argument GL_EDGE_FLAG

SEE ALSO
       glBegin(3), glEdgeFlagPointer(3), glPolygonMode(3)

								glEdgeFlag(3G)
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