1 %% Copyright (C) 2007-2012 David Legland <david.legland@grignon.inra.fr>
2 %% All rights reserved.
4 %% Redistribution and use in source and binary forms, with or without
5 %% modification, are permitted provided that the following conditions are met:
7 %% 1 Redistributions of source code must retain the above copyright notice,
8 %% this list of conditions and the following disclaimer.
9 %% 2 Redistributions in binary form must reproduce the above copyright
10 %% notice, this list of conditions and the following disclaimer in the
11 %% documentation and/or other materials provided with the distribution.
13 %% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
14 %% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 %% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 %% ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
17 %% ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 %% DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 %% SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
20 %% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
21 %% OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22 %% OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 %% 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
27 %% @deftypefn {Function File} {[@var{nodes} @var{edges} @var{faces}] = } voronoi2d (@var{germs})
28 %% Compute a voronoi diagram as a graph structure
30 %% [NODES EDGES FACES] = voronoi2d(GERMS)
31 %% GERMS an array of points with dimension 2
32 %% NODES, EDGES, FACES: usual graph representation, FACES as cell array
37 %% [n e f] = voronoi2d(rand(100, 2)*100);
44 function [nodes edges faces] = voronoi2d(germs)
45 [V C] = voronoin(germs);
58 edges = [edges; sort([cell' cell([2:end 1])'], 2)]; %#ok<AGROW>
59 faces{length(faces)+1} = cell; %#ok<AGROW>
62 edges = unique(edges, 'rows');
67 %! [n e f] = voronoi2d(rand(100, 2)*100);