GLUTESSENDPOLYGON(3G) 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-inter-secting self-intersecting
secting 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 automati-cally automatically
cally linked to the first). See the gluTessVertex, gluTessBeginContour and gluTessEndContour refer-ence reference
ence 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 val-ues values
ues stored at these addresses will not be read by the tesselator until gluTessEndPolygon is called.
SEE ALSO
gluNewTess(3G), gluTessBeginContour(3G), gluTessVertex(3G), gluTessCallback(3G), gluTessProperty(3G), gluTessNormal(3G),
gluTessBeginPolygon(3G)
GLUTESSENDPOLYGON(3G)
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