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## Copyright (C) 2024 David Legland
## 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.
##
## The views and conclusions contained in the software and documentation are
## those of the authors and should not be interpreted as representing official
## policies, either expressed or implied, of the copyright holders.
function varargout = grMergeMultipleEdges(nodes, edges)
%GRMERGEMULTIPLEEDGES Remove all edges sharing the same extremities.
%
% [NODES2, EDGES2] = grMergeMultipleEdges(NODES, EDGES)
% Remove configuration with two edges sharing the same 2 nodes.
%
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2003-08-13
% Copyright 2003-2023 INRA - TPV URPOI - BIA IMASTE
rmedge = [];
for e = 1:length(edges)
edge = edges(e, :);
for e2 = e+1:length(edges)
if (edge(1) == edges(e2, 1) && edge(2) == edges(e2, 2)) || ...
(edge(1) == edges(e2, 2) && edge(2) == edges(e2, 1))
rmedge(length(rmedge)+1) = e2; %#ok<AGROW>
end
end
end
[nodes, edges] = grRemoveEdges(nodes, edges, rmedge);
% process output depending on how many arguments are needed
if nargout == 1
out{1} = nodes;
out{2} = edges;
varargout{1} = out;
end
if nargout == 2
varargout = {nodes, edges};
end
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