GLUTESSENDPOLYGON(3G) GLUTESSENDPOLYGON(3G)

gluTessEndPolygon - delimit a polygon description

void gluTessEndPolygon( GLUtesselator* tess )












  

  
Specifies the tessellation object (created with gluNewTess).










gluTessBeginPolygon and gluTessEndPolygon delimit
    the definition of a convex, concave or self-intersecting polygon. Within
    each gluTessBeginPolygon/gluTessEndPolygon pair, there must be
    one or more calls to gluTessBeginContour/gluTessEndContour.
    Within each contour, there are zero or more calls to gluTessVertex.
    The vertices specify a closed contour (the last vertex of each contour is
    automatically linked to the first). See the gluTessVertex,
    gluTessBeginContour and gluTessEndContour reference pages for
    more details.


Once gluTessEndPolygon is called, the polygon is
    tessellated, and the resulting triangles are described through callbacks.
    See gluTessCallback for descriptions of the callback functions.








A quadrilateral with a triangular hole in it can be described like
    this:


gluTessBeginPolygon(tobj, NULL);
  

   gluTessBeginContour(tobj);
  

   gluTessVertex(tobj, v1, v1);
  

   gluTessVertex(tobj, v2, v2);
  

   gluTessVertex(tobj, v3, v3);
  

   gluTessVertex(tobj, v4, v4);
  

   gluTessEndContour(tobj);
  

   gluTessBeginContour(tobj);
  

   gluTessVertex(tobj, v5, v5);
  

   gluTessVertex(tobj, v6, v6);
  

   gluTessVertex(tobj, v7, v7);
  

   gluTessEndContour(tobj); gluTessEndPolygon(tobj); In the above example the
    pointers, v1 through v7, should point to different addresses, since the
    values stored at these addresses will not be read by the tesselator until
    gluTessEndPolygon is called.








gluNewTess, gluTessBeginContour,
    gluTessVertex, gluTessCallback, gluTessProperty,
    gluTessNormal, gluTessBeginPolygon