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GLUBEGINPOLYGON() GLUBEGINPOLYGON() NAME gluBeginPolygon, gluEndPolygon - delimit a polygon description C SPECIFICATION void gluBeginPolygon( GLUtesselator* tess ) void gluEndPolygon( GLUtesselator* tess ) delim $$ PARAMETERS tess Specifies the tessellation object (created with gluNewTess). DESCRIPTION gluBeginPolygon and gluEndPolygon delimit the definition of a nonconvex polygon. To define such a polygon, first call gluBeginPolygon. Then define the contours of the polygon by calling gluTessVertex for each vertex and gluNextContour to start each new contour. Finally, call gluEndPolygon to signal the end of the definition. See the gluTessVer- tex and gluNextContour reference pages for more details. Once gluEndPolygon is called, the polygon is tessellated, and the re- sulting triangles are described through callbacks. See gluTessCallback for descriptions of the callback functions. NOTES This command is obsolete and is provided for backward compatibility only. Calls to gluBeginPolygon are mapped to gluTessBeginPolygon fol- lowed by gluTessBeginContour. Calls to gluEndPolygon are mapped to gluTessEndContour followed by gluTessEndPolygon. EXAMPLE A quadrilateral with a triangular hole in it can be described like this: gluBeginPolygon(tobj); gluTessVertex(tobj, v1, v1); gluTessVertex(tobj, v2, v2); gluTessVertex(tobj, v3, v3); gluTessVertex(tobj, v4, v4); gluNextContour(tobj, GLU_INTERIOR); gluTessVertex(tobj, v5, v5); gluTessVertex(tobj, v6, v6); gluTessVertex(tobj, v7, v7); gluEndPolygon(tobj); SEE ALSO gluNewTess, gluNextContour, gluTessCallback, gluTessVertex, gluTessBe- ginPolygon, gluTessBeginContour GLUBEGINPOLYGON()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | NOTES | EXAMPLE | SEE ALSO
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