Index for Section 3

Alphabetical listing for G

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gluBeginPolygon()
NAME
  gluBeginPolygon, gluEndPolygon - delimit a polygon description

SYNOPSIS
  void gluBeginPolygon(
	  GLUtesselator* tess );

  void gluEndPolygon(
	  GLUtesselator* tess );

PARAMETERS
  tess
      Specifies the tessellation object (created with gluNewTess).

DESCRIPTION
  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
  This command is obsolete and is provided for backward compatibility only.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), , gluTessVertex(3),
  gluTessBeginPolygon(3), gluTessBeginContour(3)

Index for Section 3

Alphabetical listing for G

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