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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 = removeMeshEars(varargin)
%REMOVEMESHEARS Remove vertices that are connected to only one face.
%
% [V, F] = removeMeshEars(V, F)
% [V, F] = removeMeshEars(MESH)
% Remove vertices that are connected to only one face. This removes also
% "pending" faces.
% Note that if the mesh has boundary, this may remove some regular faces
% located on the boundary.
%
% Example
% removeMeshEars
%
% See also
% meshes3d, ensureManifoldMesh
%
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2019-01-08, using Matlab 8.6.0.267246 (R2015b)
% Copyright 2019-2023 INRA - Cepia Software Platform
[vertices, faces] = parseMeshData(varargin{:});
nVertices = size(vertices, 1);
% for each vertex, determine the number of faces it belongs to
vertexDegree = zeros(nVertices, 1);
for iv = 1:nVertices
vertexDegree(iv) = sum(sum(faces == iv, 2) > 0);
end
% remove vertices with degree 1
inds = find(vertexDegree == 1);
[vertices, faces] = removeMeshVertices(vertices, faces, inds);
%% Format output
varargout = formatMeshOutput(nargout, vertices, faces);
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