MirOS Manual: gluBeginPolygon(3), gluEndPolygon(3)


GLUBEGINPOLYGON(3G) UNIX Programmer's Manual  GLUBEGINPOLYGON(3G)

NAME

     gluBeginPolygon, gluEndPolygon - delimit a polygon descrip-
     tion

C SPECIFICATION

     void gluBeginPolygon( GLUtesselator* tess )

     void gluEndPolygon( GLUtesselator* tess )

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 sig-
     nal the end of the definition. See the gluTessVertex and
     gluNextContour reference pages for more details.

     Once gluEndPolygon is called, the polygon is tessellated,
     and the resulting triangles are described through callbacks.
     See gluTessCallback for descriptions of the callback func-
     tions.

NOTES

     This command is obsolete and is provided for backward compa-
     tibility only. Calls to gluBeginPolygon are mapped to
     gluTessBeginPolygon followed 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(3G), gluNextContour(3G), gluTessCallback(3G),

MirOS BSD #10-current  Printed 09.04.2016                       1

GLUBEGINPOLYGON(3G) UNIX Programmer's Manual  GLUBEGINPOLYGON(3G)

     gluTessVertex(3G), gluTessBeginPolygon(3G),
     gluTessBeginContour(3G)

MirOS BSD #10-current  Printed 09.04.2016                       2

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