gluBeginPolygon()                               gluBeginPolygon()

NAME    [Toc]    [Back]

       gluBeginPolygon,   gluEndPolygon   -   delimit  a  polygon
       description

SYNOPSIS    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

       Specifies the tessellation object (created  with  gluNewTess).

DESCRIPTION    [Toc]    [Back]

       gluBeginPolygon()  and gluEndPolygon() delimit the definition
 of a nonconvex 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 gluTessCallback() for descriptions  of  the
       callback functions.

NOTES    [Toc]    [Back]

       This command is obsolete and is provided for backward compatibility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    [Toc]    [Back]

       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    [Toc]    [Back]

       gluNewTess(3),  gluNextContour(3),  gluTessCallback(3),  ,
       gluTessVertex(3), gluTessBeginPolygon(3), gluTessBeginContour(3)



                                                gluBeginPolygon()