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<HTML><BODY><PRE>     <STRONG>NAME</STRONG>	  <STRONG>fgluBeginPolygon,</STRONG> <STRONG>fgluEndPolygon</STRONG> - delimit a polygon	  description     <STRONG>FORTRAN</STRONG> <STRONG>SPECIFICATION</STRONG>	  SUBROUTINE <STRONG>fgluBeginPolygon</STRONG>( CHARACTER*8 <EM>tess</EM>	)	  SUBROUTINE <STRONG>fgluEndPolygon</STRONG>( CHARACTER*8 <EM>tess</EM> )     <STRONG>PARAMETERS</STRONG>	  <EM>tess</EM>	Specifies the tessellation object (created with		<STRONG>fgluNewTess</STRONG>).     <STRONG>DESCRIPTION</STRONG>	  <STRONG>fgluBeginPolygon</STRONG> and <STRONG>fgluEndPolygon</STRONG> delimit the definition	  of a nonconvex polygon.  To define such a polygon, first	  call <STRONG>fgluBeginPolygon</STRONG>.  Then define the contours of the	  polygon by calling <STRONG>fgluTessVertex</STRONG> for	each vertex and	  <STRONG>fgluNextContour</STRONG> to start each	new contour.  Finally, call	  <STRONG>fgluEndPolygon</STRONG> to signal the end of the definition.  See the	  <STRONG>fgluTessVertex</STRONG> and <STRONG>fgluNextContour</STRONG> reference pages for more	  details.	  Once <STRONG>fgluEndPolygon</STRONG> is called, the polygon is	tessellated,	  and the resulting triangles are described through callbacks.	  See <STRONG>fgluTessCallback</STRONG> for descriptions	of the callback	  functions.     <STRONG>NOTES</STRONG>	  This command is obsolete and is provided for backward	  compatibility	only. Calls to <STRONG>fgluBeginPolygon</STRONG>	are mapped to	  <STRONG>fgluTessBeginPolygon</STRONG> followed	by <STRONG>fgluTessBeginContour</STRONG>. Calls	  to <STRONG>fgluEndPolygon</STRONG> are	mapped to <STRONG>fgluTessEndContour</STRONG> followed	  by <STRONG>fgluTessEndPolygon</STRONG>.     <STRONG>EXAMPLE</STRONG>	  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);     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>	  <STRONG>fgluNewTess</STRONG>, <STRONG>fgluNextContour</STRONG>,	<STRONG>fgluTessCallback</STRONG>,	  <STRONG>fgluTessVertex</STRONG>, <STRONG>fgluTessBeginPolygon</STRONG>,	<STRONG>fgluTessBeginContour</STRONG></PRE></BODY></HTML>

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