gluTessEndPolygon.3gl (GLU version 1.2 and later)

Name

  gluTessEndPolygon - delimit a	polygon	description

C Specification

  void gluTessEndPolygon( GLUtesselator	*tess )

Parameters

  tess	Specifies the tessellation object (created with	gluNewTess).

Description

  gluTessBeginPolygon and gluTessEndPolygon delimit the	definition of a

  nonconvex 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.

Example

  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);

See Also

  gluNewTess, gluTessBeginContour, gluTessVertex, gluTessCallback,

  gluTessProperty, gluTessNormal, gluTessBeginPolygon

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Last Edited: Fri, May 26, 1995

AFV