/usr/include/palabos/multiGrid/interpolationHelper.hh is in libplb-dev 1.5~r1+repack1-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | /* This file is part of the Palabos library.
*
* 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/>.
*/
#ifndef INTERPOLATION_HELPER_HH
#define INTERPOLATION_HELPER_HH
#include "interpolationHelper.h"
namespace plb {
template<typename T>
std::vector<T> asymetricCubicInterpolation(T f[4][3]){
std::vector<T> result(4);
result[0] = 3./8.*f[1][0] + 3./4.*f[1][1] -1./8.*f[1][2];
result[1] = 9./16. * (f[1][0] + f[2][0]) - 1./16. * (f[0][0] + f[3][0] );
result[2] =-(3./128.)*f[0][0]-(3./64.)*f[0][1]+(1./128.)*f[0][2]+(27./128.)*f[1][0]+(27./64.)*f[1][1]-
(9./128.)*f[1][2]+(27./128.)*f[2][0]+(27./64.)*f[2][1]-(9./128.)*f[2][2]-(3./128.)*f[3][0]-(3./64.)*f[3][1]
+(1./128.)*f[3][2];
result[3] = 3./8.*f[2][0] + 3./4.*f[2][1] -1./8.*f[2][2];
return result;
}
template<typename T>
std::vector<T> symetricCubicInterpolation(T f[4][4]){
std::vector<T> result(5);
result[0] = 9./16. * (f[1][1] + f[1][2]) - 1./16. * (f[1][0] + f[1][3] );
result[1] = 9./16. * (f[1][1] + f[2][1]) - 1./16. * (f[0][1] + f[3][1] );
result[2] = (1./256.)*f[0][0]-(9./256.)*f[0][1]-(9./256.)*f[0][2]+(1./256.)*f[0][3]-(9./256.)*f[1][0]
+(81./256.)*f[1][1]+(81./256.)*f[1][2]-(9./256.)*f[1][3]-(9./256.)*f[2][0]
+(81./256.)*f[2][1]+(81./256.)*f[2][2]-(9./256.)*f[2][3]+(1./256.)*f[3][0]-(9./256.)*f[3][1]
-(9./256.)*f[3][2]+(1./256.)*f[3][3];
result[3] = 9./16. * (f[1][2] + f[2][2]) - 1./16. * (f[0][2] + f[3][2] );
result[4] = 9./16. * (f[2][1] + f[2][2]) - 1./16. * (f[2][0] + f[2][3] );
return result;
}
template<typename T>
std::vector<T> cornerInterpolation(T f[3][3])
{
std::vector<T> result(3);
result[0] = 3./8.*f[0][0] + 3./4.*f[0][1] -1./8.*f[0][2];
result[1] = 3./8.*f[0][0] + 3./4.*f[1][0] -1./8.*f[2][0];
result[2] = (9./64.)*f[0][0]+(9./32.)*f[0][1]-(3./64.)*f[0][2]+(9./32.)*f[1][0]+(9./16.)*f[1][1]
-(3./32.)*f[1][2]-(3./64.)*f[2][0]-(3./32.)*f[2][1]+(1./64.)*f[2][2];
return result;
}
template<typename T>
std::vector<T> helperCornerInterpolation(T f[3][3])
{
std::vector<T> result(5);
result[0] = 3./8.*f[0][0] + 3./4.*f[0][1] -1./8.*f[0][2];
result[1] = 3./8.*f[0][0] + 3./4.*f[1][0] -1./8.*f[2][0];
result[2] = (9./64.)*f[0][0]+(9./32.)*f[0][1]-(3./64.)*f[0][2]+(9./32.)*f[1][0]+(9./16.)*f[1][1]
-(3./32.)*f[1][2]-(3./64.)*f[2][0]-(3./32.)*f[2][1]+(1./64.)*f[2][2];
result[3] = 3./8.*f[0][1] + 3./4.*f[1][1] -1./8.*f[2][1];
result[4] = 3./8.*f[1][0] + 3./4.*f[1][1] -1./8.*f[1][2];
return result;
}
/// Function to copy the populations to a cell of the fine grid
template<typename T, template<typename U> class Descriptor>
void copyPopulations(std::vector<T>& decomposedValues, Cell<T,Descriptor>& cell)
{
plint whichTime = 1;
dynamic_cast<FineGridBoundaryDynamics<T,Descriptor>&> ( cell.getDynamics()
).getDecomposedValues(whichTime).assign(decomposedValues.begin(),
decomposedValues.end() );
}
} // namespace plb
#endif // INTERPOLATION_HELPER_HH
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