/usr/share/octave/packages/msh-1.0.10/msh3m_nodes_on_faces.m is in octave-msh 1.0.10-5.
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##
## This file is part of:
## MSH - Meshing Software Package for Octave
##
## MSH is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## MSH is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with MSH; If not, see <http://www.gnu.org/licenses/>.
##
## author: Carlo de Falco <cdf _AT_ users.sourceforge.net>
## author: Massimiliano Culpo <culpo _AT_ users.sourceforge.net>
## -*- texinfo -*-
## @deftypefn {Function File} {[@var{nodelist}]} = @
## msh3m_nodes_on_faces(@var{mesh},@var{facelist})
##
## Return a list of @var{mesh} nodes lying on the faces specified in
## @var{facelist}.
##
## @seealso{msh3m_geometrical_properties, msh2m_nodes_on_faces}
## @end deftypefn
function [nodelist] = msh3m_nodes_on_faces(mesh,facelist);
## Check input
if nargin != 2 # Number of input parameters
error("msh3m_nodes_on_faces: wrong number of input parameters.");
elseif !(isstruct(mesh) && isfield(mesh,"p") &&
isfield(mesh,"t") && isfield(mesh,"e"))
error("msh3m_nodes_on_faces: first input is not a valid mesh structure.");
elseif !isnumeric(facelist)
error("msh3m_nodes_on_faces: only numeric value admitted as facelist.");
endif
## Search nodes
facefaces = [];
for ii=1:length(facelist)
facefaces = [facefaces,find(mesh.e(10,:)==facelist(ii))];
endfor
facenodes = mesh.e(1:3,facefaces);
nodelist = unique(facenodes(:));
endfunction
%!shared x,y,z,mesh
% x = y = z = linspace(0,1,2);
% [mesh] = msh3m_structured_mesh(x,y,z,1,1:6);
%!test
% nodelist = msh3m_nodes_on_faces(mesh,1);
% assert(nodelist,[1 2 5 6]')
%!test
% nodelist = msh3m_nodes_on_faces(mesh,2);
% assert(nodelist,[3 4 7 8]')
%!test
% nodelist = msh3m_nodes_on_faces(mesh,3);
% assert(nodelist,[1 3 5 7]')
%!test
% nodelist = msh3m_nodes_on_faces(mesh,[1 2 3]);
% assert(nodelist,[1:8]')
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