gluBeginPolygon man page on DigitalUNIX

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gluBeginPolygon()					     gluBeginPolygon()

NAME
       gluBeginPolygon, gluEndPolygon - delimit a polygon description

SYNOPSIS
       void gluBeginPolygon(
	       GLUtesselator* tess ); void gluEndPolygon(
	       GLUtesselator* tess );

PARAMETERS
       Specifies the tessellation object (created with gluNewTess).

DESCRIPTION
       gluBeginPolygon()  and gluEndPolygon() delimit the definition of a non‐
       convex polygon. To define such a polygon, first call gluBeginPolygon().
       Then  define the contours of the polygon by calling gluTessVertex() for
       each vertex and gluNextContour() to start each  new  contour.  Finally,
       call  gluEndPolygon()  to  signal  the  end  of the definition. See the
       gluTessVertex() and gluNextContour() reference pages for more details.

       Once gluEndPolygon() is called, the polygon  is	tessellated,  and  the
       resulting  triangles  are described through callbacks. See gluTessCall‐
       back() for descriptions of the callback functions.

NOTES
       This command is obsolete and is	provided  for  backward	 compatibility
       only.  Calls  to	 gluBeginPolygon() are mapped to gluTessBeginPolygon()
       followed by gluTessBeginContour().  Calls to gluEndPolygon() are mapped
       to gluTessEndContour() followed by gluTessEndPolygon().

EXAMPLE
       A  quadrilateral	 with  a  triangular  hole in it can be described like
       this: gluBeginPolygon(tobj);
	   gluTessVertex(tobj, v1, v1);
	   gluTessVertex(tobj, v2, v2);
	   gluTessVertex(tobj, v3, v3);
	   gluTessVertex(tobj, v4, v4); gluNextContour(tobj, GLU_INTERIOR);
	   gluTessVertex(tobj, v5, v5);
	   gluTessVertex(tobj, v6, v6);
	   gluTessVertex(tobj, v7, v7); gluEndPolygon(tobj);

SEE ALSO
       gluNewTess(3),  gluNextContour(3),  gluTessCallback(3),	,  gluTessVer‐
       tex(3), gluTessBeginPolygon(3), gluTessBeginContour(3)

							     gluBeginPolygon()
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