

   LLiisstt ooff nneeiigghhbboouurrss ffrroomm aa ttrriiaanngguullaattiioonn oobbjjeecctt

        neighbours(tri.obj)

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

    tri.obj: object of class `"tri"'

   DDeessccrriippttiioonn::

        Extract a list of neighbours from a triangulation
        object

   VVaalluuee::

        nested list of neighbours per point

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

        A. Gebhardt

   RReeffeerreenncceess::

        R. J. Renka (1996). Algorithm 751: TRIPACK: a con-
        strained two-dimensional {Delaunay} triangulation pack-
        age.  ACM Transactions on Mathematical Software.  22,
        1-8.

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

        `tri', `print.tri', `plot.tri', `summary.tri', `trian-
        gles'

   EExxaammpplleess::

        data(tritest)
        tritest.tr<-tri.mesh(tritest$x,tritest$y)
        tritest.nb<-neighbours(tritest.tr)

