EdgeLength.m

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function lbe=EdgeLength(be,q)
% function lbe=EdgeLength(be,q)
%   Computation of the lengths of edges in the mesh - Basic version
%   
% Parameters:
%  be: Connectivity array for boundary edges, `2\times\nbe` array.<br/>
% `\be(\il,l)` is the storage index of the
%  `\il`-th  vertex of the `l`-th edge in the array `\q` of vertices coordinates, `\il\in\{1,2\}` and
%       `l\in{\ENS{1}{\nbe}}`.
%  q: Array of vertices coordinates, `2\times\nq` array. <br/>
%  `{\q}(\il,j)` is the
%  `\il`-th coordinate of the `j`-th vertex, `\il\in\{1,2\}` and
%  `j\in\ENS{1}{\nq}`
% 
% Return values:
%  lbe: Array of edges lengths,  `1\times\nbe` array (double). `lbe(j)`  is the length of the `j`-th edge.
%
% OptFEM2DP1 [V1.2b1] -    Copyright (C) 2013  CJS (LAGA)
%
%   This file is part of OptFEM2DP1.
%   OptFEM2DP1 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 3 of the License, or
%   (at your option) any later version.
%
%   OptFEM2DP1 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 this program.  If not, see <http://www.gnu.org/licenses/>.

  nbe=size(be,2);
  lbe=zeros(1,nbe);
  for i=1:nbe
    lbe(i)=norm(q(:,be(1,i)) - q(:,be(2,i)),2);
  end