

   VVoorroonnooii oobbjjeecctt

   AArrgguummeennttss::

        x,y: x and y coordinates of nodes of the voronoi
             mosaic. Each node is a circumcircle center of some
             triangle from the Delaunay triangulation.

       node: logical vector, indicating real nodes of the
             voronoi mosaic. These nodes are the centers of
             circumcircles of triangles with positive area of
             the delaunay triangulation.

             If `node[i]'=`FALSE', (`c[i]',`x[i]') belongs to a
             triangle with area 0.

   n1,n2,n3: indices of neighbour nodes. Negative indices indi-
             cate dummy points as neighbours.

        tri: triangulation object, see `tri'.

       area: area of triangle i. `area[i]'=-1 indicates a
             removed triangle with area 0 at the border of the
             triangulation.

      ratio: aspect ratio (inscribed radius/circumradius) of
             triangle i.

   dummy.x,dummy.y: x and y coordinates of dummy points. They
             are used for plotting of unbounded tiles.

   AAuutthhoorr((ss))::

        A. Gebhardt

   SSeeee AAllssoo::

        `voronoi.mosaic',`plot.voronoi'

