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-## Copyright (C) 2003-2017 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 edgeFaces = trimeshEdgeFaces(faces, varargin)
-%TRIMESHEDGEFACES Compute index of faces adjacent to each edge of a triangular mesh
-%
-%   EF = trimeshEdgeFaces(FACES)
-%   EF = trimeshEdgeFaces(VERTICES, FACES)
-%   EF = trimeshEdgeFaces(VERTICES, EDGES, FACES)
-%   Compute index array of faces adjacent to each edge of a mesh.
-%   FACES is a NF-by-3 array containing vertex indices of each face. The
-%   result EF is a NE-by-2 array containing the indices of the two faces
-%   incident to each edge. If an edge belongs to only one face, the other
-%   face index is ZERO.
-%
-%   The list of edges (as array of source and target vertex indices) can be
-%   obtained from the function 'meshEdges'.
-%
-%   Note: faces are listed in increasing order for each edge, and no
-%   information is kept about relative orientation of edge and face.
-%
-%   Example
-%     % compute incidence list of each edge of an octahedron. For example,
-%     % first edge is incident to faces 1 and 5. Second edge is incident to
-%     % faces 4 and 8, and so on.
-%     [v, f] = createOctahedron;
-%     ef = trimeshEdgeFaces(v, f)
-%     ef =
-%          1     5
-%          4     8
-%          4     1
-%          5     8
-%          2     6
-%          1     2
-%          6     5
-%          3     7
-%          2     3
-%          7     6
-%          3     4
-%          7     8
-%
-%   See also
-%   meshes3d, meshEdgeFaces, trimeshMeanBreadth, meshEdges
- 
-% ------
-% Author: David Legland
-% e-mail: david.legland@nantes.inra.fr
-% Created: 2015-08-19,    using Matlab 8.5.0.197613 (R2015a)
-% Copyright 2015 INRA - Cepia Software Platform.
-
-if nargin == 2
-    faces = varargin{1};
-elseif nargin == 3
-    faces = varargin{2};
-end
-
-% compute vertex indices of each edge (in increasing index order)
-edges = sort([faces(:,[1 2]) ; faces(:,[2 3]) ; faces(:,[3 1])], 2);
-
-% create an array to keep indices of faces "creating" each edge
-nFaces = size(faces, 1);
-edgeFaceInds = repmat( (1:nFaces)', 3, 1);
-
-% sort edges, keeping indices
-[edges, ia, ib] = unique(edges, 'rows'); %#ok<ASGLU>
-nEdges = size(edges, 1);
-
-% allocate memory for result
-edgeFaces = zeros(nEdges, 2);
-
-% iterate over edges, to identify incident faces
-for iEdge = 1:nEdges
-    inds = find(ib == iEdge);
-    edgeFaces(iEdge, 1:length(inds)) = edgeFaceInds(inds);
-end
-