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libmultiscale/src/filter/compute_reduce.cc
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compute_reduce.cc
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/**
* @file compute_reduce.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
*
* @date Tue Dec 10 16:00:49 2013
*
* @brief This is a compute which reduce to scalar quantities
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "compute_reduce.hh"
#include "lib_md.hh"
#include "lm_common.hh"
#include "math_tools.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_LIBMULTISCALE__
/* -------------------------------------------------------------------------- */
ComputeReduce::ComputeReduce(const std::string &name) : LMObject(name) {}
/* -------------------------------------------------------------------------- */
ComputeReduce::~ComputeReduce() {}
/* -------------------------------------------------------------------------- */
template <UInt Dim, typename Op, typename Cont>
void reduce(Cont &cont, Real *reduced_data) {
Op ops[Dim];
for (UInt i = 0; i < Dim; ++i)
ops[i].init();
int cpt = 0;
for (auto &&val : cont) {
int i = cpt % 3;
ops[i].account(val);
}
for (UInt i = 0; i < Dim; ++i)
reduced_data[i] = ops[i].result(cont.getCommGroup());
}
/* -------------------------------------------------------------------------- */
template <typename Cont, typename Op>
void reduce(Cont &cont, UInt Dim, Real *reduced_data) {
switch (Dim) {
case 1:
reduce<1, Op>(cont, reduced_data);
break;
case 2:
reduce<2, Op>(cont, reduced_data);
break;
case 3:
reduce<3, Op>(cont, reduced_data);
break;
case 4:
reduce<4, Op>(cont, reduced_data);
break;
case 5:
reduce<5, Op>(cont, reduced_data);
break;
case 6:
reduce<6, Op>(cont, reduced_data);
break;
case 7:
reduce<7, Op>(cont, reduced_data);
break;
case 8:
reduce<8, Op>(cont, reduced_data);
break;
case 9:
reduce<9, Op>(cont, reduced_data);
break;
case 10:
reduce<10, Op>(cont, reduced_data);
break;
}
}
/* -------------------------------------------------------------------------- */
template <typename Cont> void ComputeReduce::build(Cont &cont) {
const UInt Dim = cont.getDim();
std::vector<Real> reduced_data(Dim);
switch (op) {
case OP_MAX:
reduce<Cont, MathTools::MaxOperator<Real>>(cont, Dim, reduced_data.data());
break;
case OP_MIN:
reduce<Cont, MathTools::MinOperator<Real>>(cont, Dim, reduced_data.data());
break;
case OP_SUM:
reduce<Cont, MathTools::SumOperator<Real>>(cont, Dim, reduced_data.data());
break;
case OP_AVERAGE:
reduce<Cont, MathTools::AverageOperator<Real>>(cont, Dim,
reduced_data.data());
break;
default:
LM_FATAL("Operator " << op << " not handled");
}
this->clear();
for (UInt i = 0; i < Dim; ++i)
this->getOutputAsArray().push_back(reduced_data[i]);
// this->name_computed.clear();
// for (UInt i = 0; i < Dim; ++i) {
// std::stringstream str;
// if (cont.name_computed.size() > i)
// str << cont.name_computed[i] << "-reduced-dim" << i;
// else
// str << "field" << i << "-reduced-dim" << i;
// this->name_computed.push_back(str.str());
// }
}
/* -------------------------------------------------------------------------- */
/* LMDESC REDUCE
This computes a reduced version of a set of reals
*/
/* LMEXAMPLE
COMPUTE disp EXTRACT INPUT md FIELD displacement\\
COMPUTE sum REDUCE INPUT disp OPERATOR MAX
*/
inline void ComputeReduce::declareParams() {
/* LMKEYWORD OPERATOR
Specify the operator to use for the reduction. \\
At present time the available operations are:
\begin{itemize}
\item MIN
\item MAX
\item SUM
\item AVERAGE
\end{itemize}
*/
this->parseKeyword("OPERATOR", op);
}
/* -------------------------------------------------------------------------- */
DECLARE_COMPUTE_MAKE_CALL(ComputeReduce)
__END_LIBMULTISCALE__
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