# tripack v1.3-9

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## Triangulation of Irregularly Spaced Data

A constrained two-dimensional Delaunay triangulation package providing both triangulation and generation of voronoi mosaics of irregular spaced data.

## Functions in tripack

 Name Description plot.tri Plot a triangulation object circum Determine the circumcircle of a triangle plot.voronoi Plot a voronoi object voronoi Voronoi object tri.dellens Compute the Delaunay segment lengths tritest tritest / sample data tri.find Locate a point in a triangulation identify.tri Identify points in a triangulation plot convex.hull Return the convex hull of a triangulation object tri.mesh Create a delaunay triangulation plot.voronoi.polygons plots an voronoi.polygons object voronoi.area Calculate area of Voronoi polygons tri A triangulation object add.constraint Add a constraint to an triangulaion object cells extract info about voronoi cells print.summary.tri Print a summary of a triangulation object summary.voronoi Return a summary of a voronoi object circles plot circles neighbours List of neighbours from a triangulation object print.summary.voronoi Print a summary of a voronoi object outer.convhull Version of outer which operates only in a convex hull voronoi.findrejectsites Find the Voronoi sites at the border of the region (to be rejected). summary.tri Return a summary of a triangulation object circumcircle Determine the circumcircle of a set of points circtest circtest / sample data on.convex.hull Determines if points are on the convex hull of a triangulation object voronoi.mosaic Create a Voronoi mosaic print.voronoi Print a voronoi object tripack-internal Internal functions left Determines whether given points are left of a directed edge. triangles Extract a list of triangles from a triangulation object in.convex.hull Determines if points are in the convex hull of a triangulation object voronoi.polygons extract polygons from a voronoi mosaic print.tri Print a triangulation object No Results!