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Thu, Jun 6, 02:17

functional.cpp
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/**
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Tamaas 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "functional.hh"
#include "bem_fft_base.hh"
/* -------------------------------------------------------------------------- */
Functional::Functional(BemFFTBase & bem):
gradF(bem.getSurface().size(), bem.getSurface().getL()),
F(std::nan("")),
parameters(),
bem(bem)
{}
/* -------------------------------------------------------------------------- */
Functional::~Functional()
{}
/* -------------------------------------------------------------------------- */
void Functional::centerGradFOnContactArea() {
UInt n = bem.getSurface().size();
UInt size = n * n;
Real mean_gradF = 0.;
UInt nb_contact = 0;
#pragma omp parallel for reduction(+: nb_contact, mean_gradF)
for (UInt i = 0 ; i < size ; ++i) {
if (bem.getTractions()(i) > 0) {
nb_contact++;
mean_gradF += gradF(i);
}
}
mean_gradF /= nb_contact;
gradF -= mean_gradF;
}
/* -------------------------------------------------------------------------- */
Real Functional::computeGradientNorm() {
UInt n = bem.getSurface().size();
UInt size = n * n;
Real res = 0.;
#pragma omp parallel for reduction(+: res)
for (UInt i = 0 ; i < size ; ++i) {
res += gradF(i)*gradF(i);
}
return res;
}

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