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scripts/geometry/voronoin.m

changeset 10289: 4b124317dc38
parent:eb63fbe60fab
author: John W. Eaton <jwe@octave.org>
date: Tue Feb 09 20:58:55 2010 -0500 (28 minutes ago)
permissions: -rw-r--r--
description: base_properties::set_children: account for hidden children 
     1## Copyright (C) 2000, 2007, 2009 Kai Habel

     2##

     3## This file is part of Octave.

     4##

     5## Octave is free software; you can redistribute it and/or modify it

     6## under the terms of the GNU General Public License as published by

     7## the Free Software Foundation; either version 3 of the License, or (at

     8## your option) any later version.

     9##

    10## Octave is distributed in the hope that it will be useful, but

    11## WITHOUT ANY WARRANTY; without even the implied warranty of

    12## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13## General Public License for more details.

    14##

    15## You should have received a copy of the GNU General Public License

    16## along with Octave; see the file COPYING.  If not, see

    17## <http://www.gnu.org/licenses/>.

    18

    19## -*- texinfo -*-

    20## @deftypefn {Function File} {[@var{C}, @var{F}] =} voronoin (@var{pts})

    21## @deftypefnx {Function File} {[@var{C}, @var{F}] =} voronoin (@var{pts}, @var{options})

    22## computes n- dimensional voronoi facets.  The input matrix @var{pts}

    23## of size [n, dim] contains n points of dimension dim.

    24## @var{C} contains the points of the voronoi facets.  The list @var{F}

    25## contains for each facet the indices of the voronoi points.

    26##

    27## A second optional argument, which must be a string, contains extra options

    28## passed to the underlying qhull command.  See the documentation for the

    29## Qhull library for details.

    30## @seealso{voronoin, delaunay, convhull}

    31## @end deftypefn

    32

    33## Author: Kai Habel <kai.habel@gmx.de>

    34## First Release: 20/08/2000

    35

    36## 2003-12-14 Rafael Laboissiere <rafael@laboissiere.net>

    37## Added optional second argument to pass options to the underlying

    38## qhull command

    39

    40function [C, F] = voronoin (pts, opt)

    41

    42  if (nargin != 1 && nargin != 2)

    43    print_usage ();

    44  endif

    45

    46  [np, dims] = size (pts);

    47  if (np > dims)

    48    if (nargin == 1)

    49      [C, F, infi] = __voronoi__ (pts);

    50    elseif ischar(opt)

    51      [C, F, infi] = __voronoi__ (pts, opt);

    52    else

    53      error ("voronoin: second argument must be a string");

    54    endif

    55

    56  else

    57    error ("voronoin: number of points must be greater than their dimension");

    58  endif

    59endfunction