Initialize at openlb-1-3

1 files changed, 193 insertions, 0 deletions

diff --git a/src/functors/lattice/blockReduction2D2D.hh b/src/functors/lattice/blockReduction2D2D.hh
new file mode 100644
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+++ b/src/functors/lattice/blockReduction2D2D.hh
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+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2018 Adrian Kummerlaender
+ *  E-mail contact: info@openlb.net
+ *  The most recent release of OpenLB can be downloaded at
+ *  <http://www.openlb.net/>
+ *
+ *  This program 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, or (at your option) any later version.
+ *
+ *  This program 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, write to the Free
+ *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA  02110-1301, USA.
+*/
+
+#ifndef BLOCK_REDUCTION_2D2D_HH
+#define BLOCK_REDUCTION_2D2D_HH
+
+#include <limits>
+#include <cmath>
+
+#include "blockReduction2D2D.h"
+#include "utilities/vectorHelpers.h"
+#include "functors/analytical/interpolationF2D.h"
+#include "communication/mpiManager.h"
+#include "utilities/functorPtr.hh"
+#include "utilities/hyperplane3D.h"
+#include "utilities/hyperplaneLattice3D.h"
+#include "utilities/hyperplane3D.hh"
+#include "utilities/hyperplaneLattice3D.hh"
+
+namespace olb {
+
+
+template <typename T>
+void BlockReduction2D2D<T>::updateToWantedResolution(int resolution)
+{
+  if (resolution>0) {
+    if (_nx > _ny) {
+      T newH = _nx*_h/(T)resolution;
+      _nx = resolution;
+      _ny = (int)(_ny*_h/newH) + 1;
+      _h = newH;
+    }
+    else {
+      T newH = _ny*_h/(T)resolution;
+      _ny = resolution;
+      _nx = (int)(_nx*_h/newH) + 1;
+      _h = newH;
+    }
+    _blockDataMemory.reset(new BlockData2D<T,T>(_nx, _ny, _f->getTargetDim()));
+  }
+}
+
+template <typename T>
+BlockReduction2D2D<T>::BlockReduction2D2D(
+  FunctorPtr<SuperF2D<T>>&& f, int resolution, BlockDataSyncMode mode)
+  : BlockDataF2D<T,T>(1, 1, f->getTargetDim()),
+    _f(std::move(f)),
+    _origin(_f->getSuperStructure().getCuboidGeometry().getMotherCuboid().getOrigin()),
+    _h(_f->getSuperStructure().getCuboidGeometry().getMinDeltaR()),
+    _nx(_f->getSuperStructure().getCuboidGeometry().getMotherCuboid().getNx()),
+    _ny(_f->getSuperStructure().getCuboidGeometry().getMotherCuboid().getNy()),
+    _blockDataMemory(new BlockData2D<T,T>(_nx, _ny, _f->getTargetDim())),
+    _syncMode(mode)
+{
+  this->getName() = "planeReduction(" + _f->getName() + ")";
+
+  _origin[0] -= 10*std::numeric_limits<T>::epsilon();
+  _origin[1] -= 10*std::numeric_limits<T>::epsilon();
+
+  // changes _h, _nx, _ny to match resolution
+  updateToWantedResolution(resolution);
+  // expose block data fields
+  this->_blockData = *_blockDataMemory;
+  // intialize list of relevant rank local points
+  initialize();
+  // first update of data
+  update();
+}
+
+template <typename T>
+Vector<T,2> BlockReduction2D2D<T>::getPhysR(const int& iX, const int& iY) const
+{
+  return Vector<T,2>{
+    _origin[0] + double(iX) * _h,
+    _origin[1] + double(iY) * _h
+  };
+}
+
+template <typename T>
+HyperplaneLattice3D<T> BlockReduction2D2D<T>::getPlaneDiscretizationIn3D() const
+{
+  return HyperplaneLattice3D<T>(
+      Hyperplane3D<T>()
+      .originAt({_origin[0], _origin[1], 0})
+      .spannedBy({1,0,0}, {0,1,0}),
+      _h, _nx, _ny);
+}
+
+template <typename T>
+void BlockReduction2D2D<T>::initialize()
+{
+  const CuboidGeometry2D<T>& geometry = _f->getSuperStructure().getCuboidGeometry();
+  LoadBalancer<T>&           load     = _f->getSuperStructure().getLoadBalancer();
+
+  _rankLocalSubplane.clear();
+
+  for ( int iX = 0; iX < _nx; ++iX ) {
+    for ( int iY = 0; iY < _ny; ++iY ) {
+      const Vector<T,2> physR = getPhysR(iX, iY);
+
+      // Schedule plane point for storage if its physical position intersects the
+      // mother cuboid and the cuboid of the nearest lattice position is local to
+      // the current rank:
+      int iC;
+      if ( geometry.getC(physR, iC) ) {
+        if ( load.isLocal(iC) ) {
+          _rankLocalSubplane.emplace_back(iX, iY, iC);
+        }
+      }
+    }
+  }
+}
+
+template <typename T>
+void BlockReduction2D2D<T>::update()
+{
+  _f->getSuperStructure().communicate();
+
+  AnalyticalFfromSuperF2D<T> analyticalF(*_f);
+
+#ifdef PARALLEL_MODE_MPI
+  BlockData2D<T,T> localBlockData(_nx, _ny, this->getTargetDim());
+#endif
+
+  for ( std::tuple<int,int,int>& pos : _rankLocalSubplane ) {
+    const int& iX = std::get<0>(pos);
+    const int& iY = std::get<1>(pos);
+    const Vector<T,2> physR = getPhysR(iX, iY);
+
+    for ( int iSize = 0; iSize < _f->getTargetDim(); ++iSize ) {
+      this->_blockData.get(iX, iY, iSize) = T();
+    }
+
+    T output[_f->getTargetDim()];
+    const T input[2] { physR[0], physR[1] };
+
+    if (analyticalF(output, input)) {
+      for ( int iSize = 0; iSize < _f->getTargetDim(); ++iSize ) {
+#ifdef PARALLEL_MODE_MPI
+        localBlockData.get(iX, iY, iSize) += output[iSize];
+#else
+        this->_blockData.get(iX, iY, iSize) += output[iSize];
+#endif
+      }
+    }
+  }
+
+#ifdef PARALLEL_MODE_MPI
+  switch ( _syncMode ) {
+  case BlockDataSyncMode::ReduceAndBcast:
+    singleton::mpi().reduce(localBlockData, this->getBlockData(), MPI_SUM);
+    singleton::mpi().bCast(this->getBlockData());
+    break;
+  case BlockDataSyncMode::ReduceOnly:
+    singleton::mpi().reduce(localBlockData, this->getBlockData(), MPI_SUM);
+    break;
+  case BlockDataSyncMode::None:
+    this->_blockData.swap(localBlockData);
+    break;
+  }
+#endif
+}
+
+template <typename T>
+BlockStructure2D& BlockReduction2D2D<T>::getBlockStructure()
+{
+  return this->_blockData;
+}
+
+
+} // end namespace olb
+
+#endif