gluTessEndPolygon man page on RedHat
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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 © 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 03/16/2013 GLUTESSENDPOLYGON(3G)
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