/* This file is part of the Palabos library.
 *
 * The Palabos softare is developed since 2011 by FlowKit-Numeca Group Sarl
 * (Switzerland) and the University of Geneva (Switzerland), which jointly
 * own the IP rights for most of the code base. Since October 2019, the
 * Palabos project is maintained by the University of Geneva and accepts
 * source code contributions from the community.
 * 
 * Contact:
 * Jonas Latt
 * Computer Science Department
 * University of Geneva
 * 7 Route de Drize
 * 1227 Carouge, Switzerland
 * jonas.latt@unige.ch
 *
 * The most recent release of Palabos can be downloaded at 
 * <https://palabos.unige.ch/>
 *
 * 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 ADVECTION_DIFFUSION_2D_HH
#define ADVECTION_DIFFUSION_2D_HH

#include "multiPhysics/advectionDiffusion2D.h"
#include "atomicBlock/blockLattice2D.h"
#include "core/util.h"
#include "finiteDifference/finiteDifference2D.h"
#include "latticeBoltzmann/geometricOperationTemplates.h"

namespace plb {

template< typename T,
          template<typename U1> class FluidDescriptor, 
          template<typename U2> class ScalarDescriptor
        >
LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>::LatticeToPassiveAdvDiff2D(T scaling_)
    : scaling(scaling_)
{ }

template< typename T,
          template<typename U1> class FluidDescriptor, 
          template<typename U2> class ScalarDescriptor
        >
void LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>::process (
              Box2D domain,
              BlockLattice2D<T,FluidDescriptor>& fluid,
              BlockLattice2D<T,ScalarDescriptor>& scalar )
{
    Dot2D offset = computeRelativeDisplacement(fluid, scalar);
    const int velOffset = ScalarDescriptor<T>::ExternalField::velocityBeginsAt;
    for (plint iX=domain.x0; iX<=domain.x1; ++iX) {
        for (plint iY=domain.y0; iY<=domain.y1; ++iY) {
            T *u = scalar.get(iX+offset.x,iY+offset.y).getExternal(velOffset);
            Array<T,2> velocity;
            fluid.get(iX,iY).computeVelocity(velocity);
            velocity *= scaling;
            velocity.to_cArray(u);
        }
    }
}

template< typename T,
          template<typename U1> class FluidDescriptor, 
          template<typename U2> class ScalarDescriptor
        >
LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>*
    LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>::clone() const
{
    return new LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>(*this);
}

template< typename T,
          template<typename U1> class FluidDescriptor, 
          template<typename U2> class ScalarDescriptor
        >
BlockDomain::DomainT LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>::appliesTo() const {
    return BlockDomain::bulk;
}

template< typename T,
          template<typename U1> class FluidDescriptor, 
          template<typename U2> class ScalarDescriptor
        >
void LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>::getTypeOfModification (
        std::vector<modif::ModifT>& modified ) const
{
    modified[0] = modif::nothing;
    modified[1] = modif::staticVariables;
}

template< typename T,
          template<typename U1> class FluidDescriptor, 
          template<typename U2> class ScalarDescriptor
        >
void latticeToPassiveAdvDiff (
        MultiBlockLattice2D<T,FluidDescriptor>& fluid, MultiBlockLattice2D<T,ScalarDescriptor>& scalar, Box2D domain )
{
    applyProcessingFunctional (
            new LatticeToPassiveAdvDiff2D<T,FluidDescriptor,ScalarDescriptor>(), domain, fluid, scalar );
}

}  // namespace plb

#endif  // ADVECTION_DIFFUSION_2D_HH

