gluTessEndPolygon man page on DigitalUNIX
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gluTessEndPolygon() gluTessEndPolygon()
NAME
gluTessEndPolygon - delimit a polygon description
SYNOPSIS
void gluTessEndPolygon(
GLUtesselator* tess );
PARAMETERS
Specifies the tessellation object (created with gluNewTess()).
DESCRIPTION
gluTessBeginPolygon() and gluTessEndPolygon() delimit the definition of
a convex, concave or self-intersecting polygon. Within each gluTessBe‐
ginPolygon()/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 gluTessCall‐
back() 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 dif‐
ferent addresses, since the values stored at these addresses will not
be read by the tesselator until gluTessEndPolygon() is called.
SEE ALSO
gluNewTess(3), gluTessBeginContour(3), gluTessVertex(3), gluTessCall‐
back(3), gluTessProperty(3), gluTessNormal(3), gluTessBeginPolygon(3)
gluTessEndPolygon()
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