glu
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 reference to a user-defined data structure. If the appropriate callback(s) are specified (see .gluTessCallback), then this reference is returned to the callback method(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 methods.
Parameters
Specifies the tessellation object( created with .gluNewTess).
Specifies a reference to user polygon data .
See also
.gluTessEndPolygon gluTessEndPolygon