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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 = parseMeshData(varargin)
%PARSEMESHDATA Conversion of data representation for meshes.
%
% MESH = parseMeshData(VERTICES, FACES)
% MESH = parseMeshData(VERTICES, EDGES, FACES)
% Returns the mesh info into a single structure with fields "vertices",
% "edges" and "faces".
%
% [VERTICES, FACES] = parseMeshData(MESH)
% Returns the mesh info into two output variables containing coordinates
% of vertices (as a Nv_by_3 array) and the list of vertex indices for
% each face (either as a Nf-by-3 or Nf-by-4 int array, or as a cell
% array).
%
% [VERTICES, EDGES, FACES] = parseMeshData(MESH)
% Also returns the vertex indices of each edge, as a Ne-by-2 array of
% vertex indices.
%
% See also
% meshes3d, formatMeshOutput
%
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2010-12-06, using Matlab 7.9.0.529 (R2009b)
% Copyright 2010-2023 INRA - Cepia Software Platform
% initialize edges to empty variable
edges = [];
% Process input arguments
switch nargin
case 1
% input is a data structure
mesh = varargin{1};
vertices = mesh.vertices;
faces = mesh.faces;
if isfield(mesh, 'edges')
edges = mesh.edges;
end
case 2
% input are vertices and faces
vertices = varargin{1};
faces = varargin{2};
case 3
% input are vertices, edges and faces
vertices = varargin{1};
edges = varargin{2};
faces = varargin{3};
otherwise
error('Wrong number of arguments');
end
% returns either a struct or several variables
varargout = formatMeshOutput(nargout, vertices, edges, faces);
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