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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 inds = meshBoundaryVertexIndices(varargin)
%MESHBOUNDARYVERTEXINDICES Indices of boundary vertices of a mesh.
%
% INDS = meshBoundaryVertexIndices(V, F)
% INDS = meshBoundaryVertexIndices(V, E, F)
%
% Example
% % create centered icosahedron
% [v, f] = createIcosahedron;
% v(:,3) = v(:,3) - mean(v(:,3));
% % convert to simili-sphere
% [v2, f2] = subdivideMesh(v, f, 3);
% v3 = normalizeVector3d(v2);
% % clip with plane
% plane = createPlane([0 0 0], [-1 -2 3]);
% [vc, fc] = clipMeshVertices(v3, f2, plane, 'shape', 'plane');
% figure; drawMesh(vc, fc); axis equal; view(3);
% % draw boundary vertices
% inds = meshBoundaryVertexIndices(vc, fc);
% hold on; drawPoint3d(vc(inds,:), 'k*');
%
% See also
% meshes3d, meshBoundary, meshBoundaryEdgeIndices, meshEdgeFaces
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2019-05-01, using Matlab 8.6.0.267246 (R2015b)
% Copyright 2019-2023 INRA - Cepia Software Platform
[vertices, faces] = parseMeshData(varargin{:});
BE = meshBoundaryEdges(vertices, faces);
inds = unique(BE(:));
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