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<STRONG>NAME</STRONG>
<STRONG>glEdgeFlag,</STRONG> <STRONG>glEdgeFlagv</STRONG> - flag edges as either boundary or
nonboundary
<STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
void <STRONG>glEdgeFlag</STRONG>( GLboolean <EM>flag</EM> )
<STRONG>PARAMETERS</STRONG>
<EM>flag</EM> Specifies the current edge flag value, either <STRONG>GL_TRUE</STRONG>
or <STRONG>GL_FALSE</STRONG>. The initial value is <STRONG>GL_TRUE</STRONG>.
<STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
void <STRONG>glEdgeFlagv</STRONG>( const GLboolean *<EM>flag</EM> )
<STRONG>PARAMETERS</STRONG>
<EM>flag</EM> Specifies a pointer to an array that contains a single
boolean element, which replaces the current edge flag
value.
<STRONG>DESCRIPTION</STRONG>
Each vertex of a polygon, separate triangle, or separate
quadrilateral specified between a <STRONG>glBegin</STRONG>/<STRONG>glEnd</STRONG> pair is
marked as the start of either a boundary or nonboundary
edge. If the current edge flag 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
nonboundary edge. <STRONG>glEdgeFlag</STRONG> sets the edge flag bit to
<STRONG>GL_TRUE</STRONG> if <EM>flag</EM> is <STRONG>GL_TRUE</STRONG>, and to <STRONG>GL_FALSE</STRONG> otherwise.
The vertices of connected triangles and connected
quadrilaterals are always marked as boundary, regardless of
the value of the edge flag.
Boundary and nonboundary edge flags on vertices are
significant only if <STRONG>GL_POLYGON_MODE</STRONG> is set to <STRONG>GL_POINT</STRONG> or
<STRONG>GL_LINE</STRONG>. See <STRONG>glPolygonMode</STRONG>.
<STRONG>NOTES</STRONG>
The current edge flag can be updated at any time. In
particular, <STRONG>glEdgeFlag</STRONG> can be called between a call to
<STRONG>glBegin</STRONG> and the corresponding call to <STRONG>glEnd</STRONG>.
<STRONG>ASSOCIATED</STRONG> <STRONG>GETS</STRONG>
<STRONG>glGet</STRONG> with argument <STRONG>GL_EDGE_FLAG</STRONG>
<STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>
<STRONG>glBegin</STRONG>, <STRONG>glEdgeFlagPointer</STRONG>, <STRONG>glPolygonMode</STRONG>
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