source: trunk/src/toolbox_calib/is3D.m @ 828

%=======================================================================
% Copyright 2008-2014, LEGI UMR 5519 / CNRS UJF G-INP, Grenoble, France
%   http://www.legi.grenoble-inp.fr
%   Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
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%     This file is part of the toolbox UVMAT.
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%     UVMAT 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,
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%     UVMAT is distributed in the hope that it will be useful,
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%=======================================================================

function test = is3D(X),


Np = size(X,2);

%% Check for planarity of the structure:

X_mean = mean(X')';

Y = X - (X_mean*ones(1,Np));

YY = Y*Y';

[U,S,V] = svd(YY);

r = S(3,3)/S(2,2);

test = (r > 1e-3);