glutessendpolygon(3g) [centos man page]

GLUTESSENDPOLYGON(3G)						   OpenGL Manual					     GLUTESSENDPOLYGON(3G)

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 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.

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);

       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.

SEE ALSO

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

COPYRIGHT

       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						     GLUTESSENDPOLYGON(3G)

GLUTESSBEGINPOLYGON(3G) 					   OpenGL Manual					   GLUTESSBEGINPOLYGON(3G)

NAME

       gluTessBeginPolygon - delimit a polygon description

C SPECIFICATION

       void gluTessBeginPolygon(GLUtesselator* tess, GLvoid* data);

PARAMETERS

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

       data
	   Specifies a pointer to user polygon data.

DESCRIPTION

       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.

       data is a pointer to a user-defined data structure. If the appropriate callback(s) are specified (see gluTessCallback()), then this pointer
       is returned to the callback function(s). Thus, it is a convenient way to store per-polygon information.

       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 as follows:

	   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(), gluTessCallback(), gluTessEndPolygon(), gluTessNormal(), gluTessProperty(), gluTessVertex()

COPYRIGHT

       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						   GLUTESSBEGINPOLYGON(3G)