removeDuplicateFaces

REMOVEDUPLICATEFACES Remove duplicate faces in a face array.

   [V, F] = removeDuplicateFaces(V, F)

   Example
     faces = [1 2 3;2 3 4;3 4 5;2 3 4];
     removeDuplicateFaces(faces)
     ans =
         1 2 3
         2 3 4
         2 3 5

   See also

0001 function faces2 = removeDuplicateFaces(faces, varargin)
0002 %REMOVEDUPLICATEFACES Remove duplicate faces in a face array.
0003 %
0004 %   [V, F] = removeDuplicateFaces(V, F)
0005 %
0006 %   Example
0007 %     faces = [1 2 3;2 3 4;3 4 5;2 3 4];
0008 %     removeDuplicateFaces(faces)
0009 %     ans =
0010 %         1 2 3
0011 %         2 3 4
0012 %         2 3 5
0013 %
0014 %   See also
0015 %
0016  
0017 % ------
0018 % Author: David Legland
0019 % e-mail: david.legland@inra.fr
0020 % Created: 2019-01-08,    using Matlab 8.6.0.267246 (R2015b)
0021 % Copyright 2019 INRA - Cepia Software Platform.
0022 
0023 nFaces = size(faces, 1);
0024 
0025 removeFlag = false(nFaces, 1);
0026 for iFace = 1:nFaces
0027     if removeFlag(iFace)
0028         continue;
0029     end
0030     
0031     face = faces(iFace, :);
0032     
0033     inds = find(sum(ismember(faces, face), 2) == 3);
0034     inds(inds <= iFace) = [];
0035     
0036     if ~isempty(inds)
0037         removeFlag(inds) = true;
0038     end
0039 end
0040 
0041 faces2 = faces(~removeFlag, :);