interactionvolumeindexset.hh

Go to the documentation of this file.

// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_DISCRETIZATION_MPFA_O_INTERACTIONVOLUME_INDEXSET_HH
#define DUMUX_DISCRETIZATION_MPFA_O_INTERACTIONVOLUME_INDEXSET_HH
 
#include <dune/common/reservedvector.hh>
 
#include <dumux/discretization/cellcentered/mpfa/dualgridindexset.hh>
 
namespace Dumux {
 
template< class DualGridNodalIndexSet >
class CCMpfaOInteractionVolumeIndexSet
{
public:
    using NodalIndexSet = DualGridNodalIndexSet;
 
    using LocalIndexType = typename DualGridNodalIndexSet::LocalIndexType;
    using GridIndexType = typename DualGridNodalIndexSet::GridIndexType;
 
    using NodalGridStencilType = typename DualGridNodalIndexSet::NodalGridStencilType;
    using NodalLocalStencilType = typename DualGridNodalIndexSet::NodalLocalStencilType;
    using NodalGridScvfStencilType = typename DualGridNodalIndexSet::NodalGridScvfStencilType;
 
    using ScvfNeighborLocalIndexSet = typename DualGridNodalIndexSet::ScvfNeighborLocalIndexSet;
 
    template< class FlipScvfIndexSet >
    CCMpfaOInteractionVolumeIndexSet(const NodalIndexSet& nodalIndexSet, const FlipScvfIndexSet& flipScvfIndexSet)
    : nodalIndexSet_(nodalIndexSet)
    {
        const auto numNodalScvfs = nodalIndexSet.numScvfs();
 
        // kee track of which nodal scvfs have been handled already
        nodeToIvScvf_.resize(numNodalScvfs);
        std::vector<bool> isHandled(numNodalScvfs, false);
 
        // go over faces in nodal index set, check if iv-local face has been
        // inserted already for this scvf and if not, insert index mapping
        numFaces_ = 0;
        for (LocalIndexType i = 0; i < numNodalScvfs; ++i)
        {
            // check if the nodal scvf still has to be handled
            if (isHandled[i])
                continue;
 
            // for scvfs touching the boundary there are no "outside" scvfs
            if (nodalIndexSet.scvfIsOnBoundary(i))
            {
                scvfNeighborScvLocalIndices_.push_back({nodalIndexSet.insideScvLocalIndex(i)});
                nodeToIvScvf_[i] = ivToNodeScvf_.size();
                isHandled[i] = true;
                ivToNodeScvf_.push_back(i);
                numFaces_++;
                continue;
            }
 
            // insert a new iv-local face
            const auto curIvLocalScvfIdx = ivToNodeScvf_.size();
            nodeToIvScvf_[i] = curIvLocalScvfIdx;
            isHandled[i] = true;
 
            // construct local index sets
            const auto& flipScvfIndices = flipScvfIndexSet[nodalIndexSet.gridScvfIndex(i)];
            const auto numFlipIndices = flipScvfIndices.size();
 
            ScvfNeighborLocalIndexSet neighborsLocal;
            neighborsLocal.resize(numFlipIndices + 1);
            neighborsLocal[0] = nodalIndexSet.insideScvLocalIndex(i);
 
            // mappings for all flip scvf
            for (unsigned int j = 0; j < numFlipIndices; ++j)
            {
                const auto outsideScvfIdx = flipScvfIndices[j];
                for (unsigned int nodeLocalIdx = 0; nodeLocalIdx < nodalIndexSet.numScvfs(); ++nodeLocalIdx)
                {
                    if (nodalIndexSet.gridScvfIndex(nodeLocalIdx) == outsideScvfIdx)
                    {
                        neighborsLocal[j+1] = nodalIndexSet.insideScvLocalIndex(nodeLocalIdx);
                        nodeToIvScvf_[nodeLocalIdx] = curIvLocalScvfIdx;
                        isHandled[nodeLocalIdx] = true;
                        break; // go to next outside scvf
                    }
                }
            }
 
            scvfNeighborScvLocalIndices_.push_back(neighborsLocal);
            ivToNodeScvf_.push_back(i);
            numFaces_++;
        }
    }
 
    const NodalIndexSet& nodalIndexSet() const
    { return nodalIndexSet_; }
 
    const NodalGridStencilType& gridScvIndices() const
    { return nodalIndexSet_.gridScvIndices(); }
 
    const NodalGridScvfStencilType& gridScvfIndices() const
    { return nodalIndexSet_.gridScvfIndices(); }
 
    std::size_t numFaces() const
    { return numFaces_; }
 
    std::size_t numScvs() const
    { return nodalIndexSet_.numScvs(); }
 
    GridIndexType gridScvIndex(LocalIndexType ivLocalScvIdx) const
    {
        assert(ivLocalScvIdx < numScvs());
        return gridScvIndices()[ivLocalScvIdx];
    }
 
    GridIndexType gridScvfIndex(LocalIndexType ivLocalScvfIdx) const
    {
        assert(ivLocalScvfIdx < numFaces());
        return nodalIndexSet_.gridScvfIndex( ivToNodeScvf_[ivLocalScvfIdx] );
    }
 
    LocalIndexType localScvfIndex(LocalIndexType scvIdxLocal, unsigned int i) const
    {
        assert(nodalIndexSet_.localScvfIndex(scvIdxLocal, i) < nodeToIvScvf_.size());
        return nodeToIvScvf_[ nodalIndexSet_.localScvfIndex(scvIdxLocal, i) ];
    }
 
    const ScvfNeighborLocalIndexSet& neighboringLocalScvIndices(LocalIndexType ivLocalScvfIdx) const
    {
        assert(ivLocalScvfIdx < numFaces());
        return scvfNeighborScvLocalIndices_[ivLocalScvfIdx];
    }
 
private:
    using NI = NodalIndexSet;
 
    std::size_t numFaces_;
    const NI& nodalIndexSet_;
    // Index maps from and to nodal index set. For the map to the
    // nodal set we use the same storage type as we know the nodal
    // has more faces, thus sufficient guaranteed here!
    typename NI::Traits::template NodalScvfDataStorage< LocalIndexType > ivToNodeScvf_;
    typename NI::Traits::template NodalScvfDataStorage< LocalIndexType > nodeToIvScvf_;
    // maps to each scvf a list of neighbouring scv indices
    // ordering: 0 - inside scv idx; 1..n - outside scv indices
    typename NI::Traits::template NodalScvfDataStorage< ScvfNeighborLocalIndexSet > scvfNeighborScvLocalIndices_;
};
 
} // end namespace Dumux
 
#endif