gluBeginPolygon.3G - Man Page

delimit a polygon description

C Specification

void gluBeginPolygon( GLUtesselator* tess )

void gluEndPolygon( GLUtesselator* tess )



Specifies the tessellation object (created with gluNewTess).


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 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 functions.


This command is obsolete and is provided for backward compatibility only. Calls to gluBeginPolygon are mapped to  gluTessBeginPolygon followed by  gluTessBeginContour. Calls to gluEndPolygon are mapped to gluTessEndContour followed by gluTessEndPolygon.


A quadrilateral with a triangular hole in it can be described like this:

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

Referenced By

gluDeleteTess.3G(3), gluNextContour.3G(3).