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libmultiscale/src/filter/compute_true_displacement.cc
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compute_true_displacement.cc
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/**
* @file compute_true_displacement.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Till Junge <till.junge@epfl.ch>
*
* @date Wed Jul 09 21:59:47 2014
*
* @brief This computes the real displacement when correcting for PBC
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* LibMultiScale 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.
*
* LibMultiScale 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 LibMultiScale. If not, see <http://www.gnu.org/licenses/>.
*
*/
#define TIMER
/* -------------------------------------------------------------------------- */
#include "compute_true_displacement.hh"
#include "compute_extract.hh"
#include "lib_continuum.hh"
#include "lib_dd.hh"
#include "lib_md.hh"
#include "lm_common.hh"
#include "ref_point_data.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_LIBMULTISCALE__
/* -------------------------------------------------------------------------- */
ComputeTrueDisplacement::ComputeTrueDisplacement(const std::string &name)
: LMObject(name) {
for (UInt i = 0; i < 3; ++i) {
pbc[i] = 0;
}
this->createInput("input");
this->createArrayOutput("output");
}
/* -------------------------------------------------------------------------- */
ComputeTrueDisplacement::~ComputeTrueDisplacement() {}
/* -------------------------------------------------------------------------- */
template <typename Cont> void ComputeTrueDisplacement::build(Cont &cont) {
constexpr UInt Dim = Cont::Dim;
if (pbc[0] == 0 && pbc[1] == 0 && pbc[2] == 0)
buildWithPBC<Dim, false, false, false>(cont);
if (pbc[0] == 1 && pbc[1] == 0 && pbc[2] == 0)
buildWithPBC<Dim, true, false, false>(cont);
if (pbc[0] == 1 && pbc[1] == 1 && pbc[2] == 0)
buildWithPBC<Dim, true, true, false>(cont);
if (pbc[0] == 1 && pbc[1] == 1 && pbc[2] == 1)
buildWithPBC<Dim, true, true, true>(cont);
if (pbc[0] == 1 && pbc[1] == 0 && pbc[2] == 1)
buildWithPBC<Dim, true, false, true>(cont);
if (pbc[0] == 0 && pbc[1] == 1 && pbc[2] == 0)
buildWithPBC<Dim, false, true, false>(cont);
if (pbc[0] == 0 && pbc[1] == 1 && pbc[2] == 1)
buildWithPBC<Dim, false, true, true>(cont);
if (pbc[0] == 0 && pbc[1] == 0 && pbc[2] == 1)
buildWithPBC<Dim, false, false, true>(cont);
}
/* -------------------------------------------------------------------------- */
template <UInt Dim, bool pbc_x, bool pbc_y, bool pbc_z, typename Cont>
void ComputeTrueDisplacement::buildWithPBC(Cont &cont) {
this->clear();
Cube &bbox = cont.getBoundingBox();
DUMP(this->getID() << ": my geometry is " << bbox, DBG_DETAIL);
auto d_size = bbox.getSize();
auto d_inv_size_half = bbox.getInvSizeHalf();
const Vector<3> &xmin = bbox.getXmin();
DUMP(this->getID() << ": d_size, d_inv_size_half, xmin [" << d_size[0] << ", "
<< d_size[1] << ", " << d_size[2] << "], ["
<< d_inv_size_half[0] << ", " << d_inv_size_half[1] << ", "
<< d_inv_size_half[2] << "], " << xmin,
DBG_DETAIL);
auto &output = this->getOutputAsArray();
output.resize(0, Dim);
for (auto &&at : cont) {
Vector<Dim> position = at.position();
auto position0 = at.position0();
Vector<Dim> u;
for (UInt i = 0; i < Dim; ++i) {
if ((pbc_x && i == 0) || (pbc_y && i == 1) || (pbc_z && i == 2)) {
int offset = floor((position[i] - xmin[i]) / d_size[i]);
position[i] -= offset * d_size[i];
u[i] = position[i] - position0[i];
offset = static_cast<int>(u[i] * d_inv_size_half[i]);
u[i] -= offset * d_size[i];
} else
u[i] = position[i] - position0[i];
}
output.push_back(u);
}
}
/* -------------------------------------------------------------------------- */
/* LMDESC TRUEDISP
This allow the compute the true displacement of points in a periodic
domain, as long as none of the points moves by more than have a domain size
in a given direction.
*/
/* LMEXAMPLE
COMPUTE trueDisp TRUEDISP INPUT md PBC 1 1 0
*/
inline void ComputeTrueDisplacement::declareParams() {
ComputeInterface::declareParams();
/* LMKEYWORD PBC
Specify if periodic boundary conditions should be considered for each
direction
*/
this->parseVectorKeyword("PBC", spatial_dimension, pbc);
}
/* -------------------------------------------------------------------------- */
DECLARE_COMPUTE_MAKE_CALL(ComputeTrueDisplacement)
__END_LIBMULTISCALE__
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