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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 res = formatMeshOutput(nbArgs, vertices, edges, faces)
%FORMATMESHOUTPUT Format mesh output depending on nargout.
%
% OUTPUT = formatMeshOutput(NARGOUT, VERTICES, EDGES, FACES)
% Utilitary function to convert mesh data .
% If NARGOUT is 0 or 1, return a matlab structure with fields vertices,
% edges and faces.
% If NARGOUT is 2, return a cell array with data VERTICES and FACES.
% If NARGOUT is 3, return a cell array with data VERTICES, EDGES and
% FACES.
%
% OUTPUT = formatMeshOutput(NARGOUT, VERTICES, FACES)
% Same as before, but do not intialize EDGES in output. NARGOUT can not
% be equal to 3.
%
% Example
% % Typical calling sequence (for a very basic mesh of only one face)
% v = [0 0; 0 1;1 0;1 1];
% e = [1 2;1 3;2 4;3 4];
% f = [1 2 3 4];
%
% varargout = formatMeshOutput(nargout, v, e, f);
%
% See also
% meshes3d, parseMeshData
% ------
% 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
if nargin < 4
faces = edges;
edges = [];
end
switch nbArgs
case {0, 1}
% output is a data structure with fields vertices, edges and faces
mesh.vertices = vertices;
if ~isempty(edges)
mesh.edges = edges;
end
mesh.faces = faces;
res = {mesh};
case 2
% keep only vertices and faces
res = cell(nbArgs, 1);
res{1} = vertices;
res{2} = faces;
case 3
% return vertices, edges and faces as 3 separate outputs
res = cell(nbArgs, 1);
res{1} = vertices;
res{2} = edges;
res{3} = faces;
otherwise
error('Cannot manage more than 3 outputs');
end
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