/usr/include/palabos/latticeBoltzmann/indexTemplates.h is in libplb-dev 1.5~r1+repack1-3.
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*
* Copyright (C) 2011-2015 FlowKit Sarl
* Route d'Oron 2
* 1010 Lausanne, Switzerland
* E-mail contact: contact@flowkit.com
*
* The most recent release of Palabos can be downloaded at
* <http://www.palabos.org/>
*
* The library Palabos is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* The library 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Templates for finding indexes for a specific subset of the neighborhood
* -- header file
*/
#ifndef INDEX_TEMPLATES_H
#define INDEX_TEMPLATES_H
#include "core/globalDefs.h"
#include "core/array.h"
#include <algorithm>
#include <vector>
namespace plb {
namespace indexTemplates {
/// Compute the opposite of a given direction
template <typename Descriptor> inline plint opposite(plint iPop) {
if (iPop==0) return 0;
if (iPop<=Descriptor::q/2) return iPop + Descriptor::q/2;
return iPop - Descriptor::q/2;
}
/// Compute the opposite of a given direction
template <typename Descriptor> inline std::vector<plint> opposite(const std::vector<plint> &pops_) {
std::vector<plint> pops(pops_);
for (pluint iPop = 0; iPop < pops_.size(); ++iPop) {
pops[iPop] = opposite<Descriptor>(pops_[iPop]);
}
return pops;
}
template <typename Descriptor>
plint findVelocity(Array<int,Descriptor::d> const& v) {
for (plint iPop=0; iPop<Descriptor::q; ++iPop) {
bool fit = true;
for (int iD=0; iD<Descriptor::d; ++iD) {
if (Descriptor::c[iPop][iD] != v[iD]) {
fit = false;
break;
}
}
if (fit) return iPop;
}
return Descriptor::q;
}
/// Compute the index corresponding to a specular reflexion
template <typename Descriptor, int orientation> inline plint specularReflexion(plint iPop) {
if (iPop==0) return 0;
Array<int,Descriptor::d> v;
for (plint iD = 0; iD < Descriptor::d; ++iD) v[iD] = Descriptor::c[iPop][iD];
v[orientation] = -v[orientation];
return findVelocity<Descriptor>(v);
}
template <typename Descriptor, plint index, plint value>
class SubIndex {
private:
SubIndex() {
for (int iVel=0; iVel<Descriptor::q; ++iVel) {
if (Descriptor::c[iVel][index]==value) {
indices.push_back(iVel);
}
}
}
std::vector<plint> indices;
template <typename Descriptor_, plint index_, plint value_>
friend std::vector<plint> const& subIndex();
};
template <typename Descriptor, plint index, plint value>
std::vector<plint> const& subIndex() {
static SubIndex<Descriptor, index, value> subIndexSingleton;
return subIndexSingleton.indices;
}
/**
* finds distributions incoming into the wall
* but we want the ones outgoing from the wall,
* therefore we have to take the opposite ones.
*/
template <typename Descriptor, int direction, int orientation>
class SubIndexOutgoing {
private:
SubIndexOutgoing() // finds the indexes outgoing from the walls
{
indices = indexTemplates::subIndex<Descriptor,direction,orientation>();
for (pluint iPop = 0; iPop < indices.size(); ++iPop) {
indices[iPop] = indexTemplates::opposite<Descriptor>(indices[iPop]);
}
}
std::vector<plint> indices;
template <typename Descriptor_, int direction_, int orientation_>
friend std::vector<plint> const& subIndexOutgoing();
};
template <typename Descriptor, int direction, int orientation>
std::vector<plint> const& subIndexOutgoing() {
static SubIndexOutgoing<Descriptor, direction, orientation> subIndexOutgoingSingleton;
return subIndexOutgoingSingleton.indices;
}
///finds all the remaining indexes of a lattice given some other indexes
template <typename Descriptor>
std::vector<plint> remainingIndexes(const std::vector<plint> &indices)
{
std::vector<plint> remaining;
for (plint iPop = 0; iPop < Descriptor::q; ++iPop)
{
bool found = false;
for (pluint jPop = 0; jPop < indices.size(); ++jPop)
{
if (indices[jPop] == iPop)
{
found = true;
}
}
if (!found)
{
remaining.push_back(iPop);
}
}
return remaining;
}
/// finds the indexes outgoing from a 2D corner
template <typename Descriptor, int xNormal, int yNormal>
class SubIndexIngoingCorner2D {
private:
SubIndexIngoingCorner2D()
{
typedef Descriptor L;
Array<int, L::d> vect ( -xNormal, -yNormal );
indices.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = -xNormal; vect[1] = 0;
indices.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = -yNormal;
indices.push_back(indexTemplates::findVelocity<L>(vect));
}
std::vector<plint> indices;
template <typename Descriptor_, int xNormal_, int yNormal_>
friend std::vector<plint> const& subIndexIngoingCorner2D();
};
template <typename Descriptor, int xNormal, int yNormal>
std::vector<plint> const& subIndexIngoingCorner2D() {
static SubIndexIngoingCorner2D<Descriptor, xNormal, yNormal> subIndexIngoingCorner2DSingleton;
return subIndexIngoingCorner2DSingleton.indices;
}
/// finds the indexes outgoing from a 2D corner
template <typename Descriptor, int xNormal, int yNormal>
class SubIndexOutgoingCorner2D {
private:
SubIndexOutgoingCorner2D()
{
typedef Descriptor L;
Array<int, L::d> vect ( xNormal, yNormal );
std::vector<plint> knownIndexes;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = xNormal; vect[1] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = yNormal;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
indices = indexTemplates::remainingIndexes<L>(knownIndexes);
}
std::vector<plint> indices;
template <typename Descriptor_, int xNormal_, int yNormal_>
friend std::vector<plint> const& subIndexOutgoingCorner2D();
};
template <typename Descriptor, int xNormal, int yNormal>
std::vector<plint> const& subIndexOutgoingCorner2D() {
static SubIndexOutgoingCorner2D<Descriptor, xNormal, yNormal> subIndexOutgoingCorner2DSingleton;
return subIndexOutgoingCorner2DSingleton.indices;
}
/// finds the indexes outgoing from a 2D corner
template <typename Descriptor, int xNormal, int yNormal>
class SubIndexOutgoingInternalCorner2D {
private:
SubIndexOutgoingInternalCorner2D()
{
typedef Descriptor L;
Array<int, L::d> vect ( -xNormal, -yNormal );
indices.push_back(indexTemplates::findVelocity<L>(vect));
}
std::vector<plint> indices;
template <typename Descriptor_, int xNormal_, int yNormal_>
friend std::vector<plint> const& subIndexOutgoingInternalCorner2D();
};
template <typename Descriptor, int xNormal, int yNormal>
std::vector<plint> const& subIndexOutgoingInternalCorner2D() {
static SubIndexOutgoingInternalCorner2D<Descriptor, xNormal, yNormal> subIndexOutgoingInternalCorner2DSingleton;
return subIndexOutgoingInternalCorner2DSingleton.indices;
}
/// finds the indexes outgoing from a 3D corner
template <typename Descriptor, int xNormal, int yNormal, int zNormal>
class SubIndexOutgoingExternalCorner3D {
private:
SubIndexOutgoingExternalCorner3D() {
typedef Descriptor L;
Array<int, L::d> vect ( xNormal, yNormal, zNormal);
std::vector<plint> knownIndexes;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = xNormal; vect[1] = 0; vect[2] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = yNormal; vect[2] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = 0; vect[2] = zNormal;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = xNormal; vect[1] = yNormal; vect[2] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = yNormal; vect[2] = zNormal;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = xNormal; vect[1] = 0; vect[2] = zNormal;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[0] = 0; vect[1] = 0; vect[2] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
indices = indexTemplates::remainingIndexes<L>(knownIndexes);
}
std::vector<plint> indices;
template <typename Descriptor_, int xNormal_, int yNormal_, int zNormal_>
friend std::vector<plint> const& subIndexOutgoingExternalCorner3D();
};
template <typename Descriptor, int xNormal, int yNormal, int zNormal>
std::vector<plint> const& subIndexOutgoingExternalCorner3D() {
static SubIndexOutgoingExternalCorner3D<Descriptor, xNormal, yNormal,zNormal>
subIndexOutgoingExternalCorner3DSingleton;
return subIndexOutgoingExternalCorner3DSingleton.indices;
}
/// finds the indexes outgoing from a 3D edge
template <typename Descriptor, int plane, int normal1, int normal2>
class SubIndexOutgoingExternalEdge3D {
private:
SubIndexOutgoingExternalEdge3D() {
enum { direction1 = (plane+1)%3, direction2 = (plane+2)%3 };
typedef Descriptor L;
Array<int, L::d> vect(0, 0, 0);
std::vector<plint> knownIndexes;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = 0; vect[direction2] = 0; vect[plane] = -1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = 0; vect[direction2] = 0; vect[plane] = +1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = normal1; vect[direction2] = 0; vect[plane] = -1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = normal1; vect[direction2] = 0; vect[plane] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = normal1; vect[direction2] = 0; vect[plane] = +1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = 0; vect[direction2] = normal2; vect[plane] = -1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = 0; vect[direction2] = normal2; vect[plane] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = 0; vect[direction2] = normal2; vect[plane] = +1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = normal1; vect[direction2] = normal2; vect[plane] = -1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = normal1; vect[direction2] = normal2; vect[plane] = 0;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
vect[direction1] = normal1; vect[direction2] = normal2; vect[plane] = +1;
knownIndexes.push_back(indexTemplates::findVelocity<L>(vect));
indices = indexTemplates::remainingIndexes<L>(knownIndexes);
}
std::vector<plint> indices;
template <typename Descriptor_, int plane_, int normal1_, int normal2_>
friend std::vector<plint> const& subIndexOutgoingExternalEdge3D();
};
template <typename Descriptor, int plane, int normal1, int normal2>
std::vector<plint> const& subIndexOutgoingExternalEdge3D() {
static SubIndexOutgoingExternalEdge3D<Descriptor, plane, normal1, normal2>
subIndexOutgoingExternalEdge3DSingleton;
return subIndexOutgoingExternalEdge3DSingleton.indices;
}
/// finds the indexes outgoing from a 3D edge
template <typename Descriptor, int plane, int normal1, int normal2>
class SubIndexOutgoingInternalEdge3D {
private:
SubIndexOutgoingInternalEdge3D() {
enum { direction1 = (plane+1)%3, direction2 = (plane+2)%3 };
typedef Descriptor L;
Array<int, L::d> vect(0,0,0);
vect[direction1] = -normal1;
vect[direction2] = -normal2;
vect[plane] = -1;
indices.push_back(indexTemplates::findVelocity<L>(vect));
vect[plane] = 0;
indices.push_back(indexTemplates::findVelocity<L>(vect));
vect[plane] = +1;
indices.push_back(indexTemplates::findVelocity<L>(vect));
}
std::vector<plint> indices;
template <typename Descriptor_, int plane_, int normal1_, int normal2_>
friend std::vector<plint> const& subIndexOutgoingInternalEdge3D();
};
template <typename Descriptor, int plane, int normal1, int normal2>
std::vector<plint> const& subIndexOutgoingInternalEdge3D() {
static SubIndexOutgoingInternalEdge3D<Descriptor, plane, normal1, normal2>
subIndexOutgoingInternalEdge3DSingleton;
return subIndexOutgoingInternalEdge3DSingleton.indices;
}
/// finds the indexes outgoing from a 3D corner
template <typename Descriptor, int xNormal, int yNormal, int zNormal>
class SubIndexOutgoingInternalCorner3D {
private:
SubIndexOutgoingInternalCorner3D()
{
typedef Descriptor L;
Array<int, L::d> vect ( -xNormal, -yNormal, -zNormal );
indices.push_back(indexTemplates::findVelocity<L>(vect));
}
std::vector<plint> indices;
template <typename Descriptor_, int xNormal_, int yNormal_, int zNormal_>
friend std::vector<plint> const& subIndexOutgoingInternalCorner3D();
};
template <typename Descriptor, int xNormal, int yNormal, int zNormal>
std::vector<plint> const& subIndexOutgoingInternalCorner3D() {
static SubIndexOutgoingInternalCorner3D<Descriptor, xNormal, yNormal, zNormal>
subIndexOutgoingInternalCorner3DSingleton;
return subIndexOutgoingInternalCorner3DSingleton.indices;
}
} // namespace indexTemplates
} // namespace plb
#endif // INDEX_TEMPLATES_H
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