--- /dev/null
+%% Copyright (C) 2004-2012 David Legland <david.legland@grignon.inra.fr>
+%% All rights reserved.
+%%
+%% Redistribution and use in source and binary forms, with or without
+%% modification, are permitted provided that the following conditions are met:
+%%
+%% 1 Redistributions of source code must retain the above copyright notice,
+%% this list of conditions and the following disclaimer.
+%% 2 Redistributions in binary form must reproduce the above copyright
+%% notice, this list of conditions and the following disclaimer in the
+%% documentation and/or other materials provided with the distribution.
+%%
+%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
+%% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+%% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+%% ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+%% ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+%% DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+%% SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+%% OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+%% OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+%%
+%% 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
+
+%% -*- texinfo -*-
+%% @deftypefn {Function File} drawGraph (@var{nodes}, @var{edges})
+%% @deftypefnx {Function File} drawGraph (@var{nodes}, @var{edges}, @var{faces})
+%% @deftypefnx {Function File} drawGraph (@var{graph})
+%% @deftypefnx {Function File} drawGraph (@dots{}, @var{snodes})
+%% @deftypefnx {Function File} drawGraph (@dots{}, @var{snodes}, @var{sedges})
+%% @deftypefnx {Function File} drawGraph (@dots{}, @var{snodes}, @var{sedges}, @var{sfaces})
+%% @deftypefnx {Function File} {@var{h} = } drawGraph (@dots{})
+%% @deftypefnx {Function File} {[@var{h} @var{he}] = } drawGraph (@dots{})
+%% @deftypefnx {Function File} {[@var{h} @var{he} @var{hf}] = } drawGraph (@dots{})
+%% Draw a graph, given as a set of vertices and edges
+%%
+%% DRAWGRAPH(NODES, EDGES)
+%% draw a graph specified by a set of nodes (array N*2 or N*3,
+%% corresponding to coordinate of each node), and a set of edges (an array
+%% Ne*2, containing for each edge the first and the second node).
+%% Default drawing is a red circle for nodes and a blue line for edges.
+%%
+%% DRAWGRAPH(NODES, EDGES, FACES)
+%% also draw faces of the graph as patches.
+%%
+%% DRAWGRAPH(GRAPH)
+%% passes argument in a srtucture with at least 2 fields named 'nodes' and
+%% 'edges', and possibly one field 'faces', corresponding to previously
+%% described parameters.
+%% GRAPH can also be a cell array, whose first element is node array,
+%% second element is edges array, and third element, if present, is faces
+%% array.
+%%
+%%
+%% DRAWGRAPH(..., SNODES)
+%% DRAWGRAPH(..., SNODES, SEDGES)
+%% DRAWGRAPH(..., SNODES, SEDGES, SFACES)
+%% specify the draw mode for each element, as in the classical 'plot'
+%% function. To not display some elements, uses 'none'.
+%%
+%%
+%% H = DRAWGRAPH(...)
+%% return handle to the set of edges.
+%%
+%% [HN, HE] = DRAWGRAPH(...)
+%% return handle to the set of nodes and to the set of edges.
+%%
+%% [HN, HE, HF] = DRAWGRAPH(...)
+%% Also return handle to the set of faces.
+%%
+%% @end deftypefn
+function varargout = drawGraph(varargin)
+
+ %% initialisations
+
+ % uses empty arrays by default for edges and faces
+ e = [];
+ f = [];
+
+ % default styles for nodes, edges, and faces
+
+ % nodes are drawn as red circles
+ sn = {'linestyle', 'none', 'color', 'r', 'marker', 'o'};
+
+ % edges are drawn as blue lines
+ se = {'linestyle', '-', 'color', 'b'};
+
+ % faces are cyan, their edges are not drawn
+ sf = {'EdgeColor', 'none', 'Facecolor', 'c'};
+
+
+ %% Process input arguments
+
+ % case of a call without arguments
+ if nargin==0
+ help drawGraph;
+ return;
+ end
+
+ % ---------------------------------------------------------------
+ % First extract the graph structure
+
+ var = varargin{1};
+ if iscell(var)
+ % graph is stored as a cell array: first cell is nodes, second one is
+ % edges, and third is faces
+ n = var{1};
+ if length(var)>1
+ e = var{2};
+ end
+ if length(var)>2
+ f = var{3};
+ end
+ varargin(1) = [];
+ elseif isstruct(var)
+ % graph is stored as a structure, with fields 'nodes', 'edges', and
+ % eventually 'faces'.
+ n = var.nodes;
+ e = var.edges;
+ if isfield(var, 'faces')
+ f = var.faces;
+ end
+ varargin(1) = [];
+ else
+ % graph is stored as set of variables: nodes, edges, and eventually
+ % faces
+ n = varargin{1};
+ e = varargin{2};
+ varargin(1:2) = [];
+
+ if ~isempty(varargin)
+ var = varargin{1};
+ if isnumeric(var)
+ % faces are stored in a numeric array of indices
+ f = var;
+ varargin(1) = [];
+ elseif iscell(var)
+ if ~ischar(var{1})
+ % faces are stored in a cell array, each cell containing a
+ % row vector of indices
+ f = var;
+ varargin(1) = [];
+ end
+ end
+ end
+ end
+
+ % extract drawing style
+
+ if ~isempty(varargin)
+ sn = concatArguments(sn, varargin{1});
+ end
+
+ if length(varargin)>1
+ se = concatArguments(se, varargin{2});
+ end
+
+ if length(varargin)>2
+ sf = concatArguments(sf, varargin{3});
+ end
+
+
+
+ %% main drawing processing
+
+ hold on;
+
+ if size(n, 2)==2
+ % Draw a 2 dimensional graph ----------------------
+
+ % Draw faces of the graph ------------
+ if ~strcmp(sf{1}, 'none') && ~isempty(f)
+ if iscell(f)
+ % each face is contained in a cell.
+ hf = zeros(size(f));
+ for fi=1:length(f)
+ hf(fi) = patch('Faces', f{fi}, 'Vertices', n, sf{:});
+ end
+ else
+ % process faces as an Nf*N array. Nf is the number of faces,
+ % and all faces have the same number of vertices (nodes).
+ hf = patch('Faces', f, 'Vertices', n, sf{:});
+ end
+ end
+
+ % Draw 2D Edges ----------------------
+ if ~strcmp(se{1}, 'none') && size(e, 1)>0
+ he = plot([n(e(:,1),1) n(e(:,2),1)]', [n(e(:,1),2) n(e(:,2),2)]', se{:});
+ end
+
+ % Draw 2D nodes ----------------------
+ if ~strcmp(sn{1}, 'none')
+ hn = plot(n(:,1), n(:,2), sn{:});
+ end
+
+
+ elseif size(n, 2)==3
+ % Draw a 3 dimensional graph ----------------------
+
+ % use a zbuffer to avoid display pbms.
+ set(gcf, 'renderer', 'zbuffer');
+
+ % Draw 3D Faces ----------------------
+ if ~strcmp(sf{1}, 'none')
+ if iscell(f)
+ % each face is contained in a cell.
+ hf = zeros(size(f));
+ for fi=1:length(f)
+ hf(fi) = patch('Faces', f{fi}, 'Vertices', n, sf{:});
+ end
+ else
+ % process faces as an Nf*N array. Nf i the number of faces,
+ % and all faces have the same number of vertices (nodes).
+ hf = patch('Faces', f, 'Vertices', n, sf{:});
+ end
+ end
+
+ % Draw 3D edges ----------------------
+ if ~strcmp(se{1}, 'none') && size(e, 1)>0
+ % he = plot3(...
+ % [n(e(:,1),1) n(e(:,2),1)]', ...
+ % [n(e(:,1),2) n(e(:,2),2)]', ...
+ % [n(e(:,1),3) n(e(:,2),3)]', ...
+ % se{:});
+ he = line(...
+ [n(e(:,1),1) n(e(:,2),1)]', ...
+ [n(e(:,1),2) n(e(:,2),2)]', ...
+ [n(e(:,1),3) n(e(:,2),3)]', ...
+ se{:});
+ end
+
+ % Draw 3D nodes ----------------------
+ if ~strcmp(sn{1}, 'none');
+ hn = plot3(n(:,1), n(:,2), n(:,3), sn{:});
+ end
+
+ end
+
+
+ %% Format output arguments
+
+ % return handle to edges
+ if nargout==1
+ varargout{1} = he;
+ end
+
+ % return handle to nodes and edges
+ if nargout==2
+ varargout{1} = hn;
+ varargout{2} = he;
+ end
+
+ % return handle to nodes, edges and faces
+ if nargout==3
+ varargout{1} = hn;
+ varargout{2} = he;
+ varargout{3} = hf;
+ end
+
+
+
+endfunction
+
+function res = concatArguments(in1, in2)
+ % in1 is a cell array already initialized
+ % in2 is an argument that can be:
+ % - empty
+ % - the string 'none'
+ % - another cell array
+
+ if isempty(in2)
+ res = in1;
+ return;
+ end
+
+ if ischar(in2)
+ if strcmp('none', in2)
+ res = {'none'};
+ return;
+ end
+ end
+
+ if iscell(in1)
+ res = [in1(:)' in2(:)'];
+ else
+ res = [{in1} in2(:)];
+ end
+
+endfunction
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff