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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 HYPERPLANE_LATTICE_2D_HH
#define HYPERPLANE_LATTICE_2D_HH
#include "hyperplaneLattice2D.h"
namespace olb {
template <typename T>
int HyperplaneLattice2D<T>::computeMaxLatticeDistance() const
{
const Cuboid2D<T>& cuboid = _geometry.getMotherCuboid();
const Vector<T,2> origin = cuboid.getOrigin();
const Vector<int,2> extend = cuboid.getExtend();
const T deltaR = cuboid.getDeltaR();
T maxPhysDistance = T();
T tmp;
Vector<T,2> tmpO;
Vector<T,2> tmpE;
for(int iDim=0; iDim<2; ++iDim){
tmpO[iDim] = origin[iDim] - _origin[iDim];
tmpE[iDim] = origin[iDim] + extend[iDim]*deltaR - _origin[iDim];
}
tmp = sqrt(tmpO[0]*tmpO[0] + tmpO[1]*tmpO[1]);
if (maxPhysDistance < tmp) {
maxPhysDistance = tmp;
}
tmp = sqrt((tmpE[0]*tmpE[0] + tmpO[1]*tmpO[1]));
if (maxPhysDistance < tmp) {
maxPhysDistance = tmp;
}
tmp = sqrt(tmpO[0]*tmpO[0] + tmpE[1]*tmpE[1]);
if (maxPhysDistance < tmp) {
maxPhysDistance = tmp;
}
tmp = sqrt(tmpE[0]*tmpE[0] + tmpE[1]*tmpE[1]);
if (maxPhysDistance < tmp) {
maxPhysDistance = tmp;
}
return int(maxPhysDistance/_h) + 1;
}
template <typename T>
void HyperplaneLattice2D<T>::constructCuboid(int maxLatticeDistance)
{
int iC;
int min = -maxLatticeDistance;
int max = maxLatticeDistance;
for ( int i = -maxLatticeDistance; i < maxLatticeDistance; ++i ) {
if ( _geometry.getC(getPhysR(i), iC) ) {
min = i;
break;
}
}
for ( int i = maxLatticeDistance; i > -maxLatticeDistance; --i ) {
if ( _geometry.getC(getPhysR(i), iC) ) {
max = i;
break;
}
}
_n = max - min + 1;
_origin = _origin + double(min)*_u;
}
template <typename T>
void HyperplaneLattice2D<T>::setToResolution(int resolution)
{
T newH = _n*_h/(T) resolution;
_n = resolution;
_h = newH;
_u.normalize(_h);
}
template<typename T>
HyperplaneLattice2D<T>::HyperplaneLattice2D(
CuboidGeometry2D<T>& geometry, Hyperplane2D<T> hyperplane)
: _geometry(geometry),
_hyperplane(hyperplane),
_origin(hyperplane.origin),
_u(hyperplane.u),
_h(geometry.getMinDeltaR())
{
_u.normalize(_h);
const int maxLatticeDistance = computeMaxLatticeDistance();
// compute _hyperplane.origin, _nx, _ny so that the cuboid is right inside the geometry
constructCuboid(maxLatticeDistance);
}
template<typename T>
HyperplaneLattice2D<T>::HyperplaneLattice2D(
CuboidGeometry2D<T>& geometry, Hyperplane2D<T> hyperplane, int resolution)
: _geometry(geometry),
_hyperplane(hyperplane),
_origin(hyperplane.origin),
_u(hyperplane.u),
_h(geometry.getMinDeltaR())
{
_u.normalize(_h);
const int maxLatticeDistance = computeMaxLatticeDistance();
// compute _hyperplane.origin, _nx, _ny so that the cuboid is right inside the geometry
constructCuboid(maxLatticeDistance);
if ( resolution > 0 ) {
setToResolution(resolution);
}
}
template<typename T>
HyperplaneLattice2D<T>::HyperplaneLattice2D(
CuboidGeometry2D<T>& geometry, Hyperplane2D<T> hyperplane, T h)
: _geometry(geometry),
_hyperplane(hyperplane),
_origin(hyperplane.origin),
_u(hyperplane.u),
_h(h)
{
if ( util::nearZero(_h) ) {
_h = _geometry.getMinDeltaR();
}
_u.normalize(_h);
const int maxLatticeDistance = computeMaxLatticeDistance();
// compute _hyperplane.origin, _nx, _ny so that the cuboid is right inside the geometry
constructCuboid(maxLatticeDistance);
}
template <typename T>
const Hyperplane2D<T>& HyperplaneLattice2D<T>::getHyperplane() const
{
return _hyperplane;
}
template <typename T>
Vector<T,2> HyperplaneLattice2D<T>::getPhysR(const int& n) const
{
return Vector<T,2> {
_origin[0] + double(n)*_u[0],
_origin[1] + double(n)*_u[1]
};
}
template <typename T>
int HyperplaneLattice2D<T>::getN() const
{
return _n;
}
template <typename T>
T HyperplaneLattice2D<T>::getPhysSpacing() const
{
return _h;
}
template <typename T>
Vector<T,2> HyperplaneLattice2D<T>::getPhysOrigin() const
{
return _origin;
}
template <typename T>
Vector<T,2> HyperplaneLattice2D<T>::getVectorU() const
{
return _u;
}
}
#endif
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