GLEDGEFLAG(3G)                                                  GLEDGEFLAG(3G)



NAME
       glEdgeFlag,, glEdgeFlagv - flag edges as either boundary or nonboundary


C SPECIFICATION
       void glEdgeFlag( GLboolean flag )


PARAMETERS
       flag  Specifies   the  current  edge  flag  value,  either  GLTRUE  or
             GLFALSE. The initial value is GLTRUE.

C SPECIFICATION
       void glEdgeFlagv( const GLboolean *flag )


PARAMETERS
       flag   Specifies a pointer to an array that contains a  single  boolean
              element, which replaces the current edge flag 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 flag is true when
       the vertex is specified, the vertex is marked as the start of a  bound-
       ary  edge.  Otherwise, the vertex is marked as the start of a nonbound-
       ary edge.  glEdgeFlag sets the edge flag bit  to  GLTRUE  if  flag  is
       GLTRUE, and to GLFALSE 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
       GLPOLYGONMODE is set to GLPOINT or GLINE.  See glPolygonode.

NOTES
       The  current  edge  flag  can  be  updated at any time.  In particular,
       glEdgeFlag can be called between a call to glBegin and the  correspond-
       ing call to glEnd.

ASOCIATED GETS
       glGet with argument GLEDGEFLAG

SEE ALSO
       glBegin, glEdgeFlagPointer, glPolygonode



                                                                GLEDGEFLAG(3G)