pq1bubblefecache.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_DISCRETIZATION_PQ1BUBBLE_FECACHE_HH
#define DUMUX_DISCRETIZATION_PQ1BUBBLE_FECACHE_HH
 
#include <memory>
 
#include <dune/common/exceptions.hh>
#include <dune/geometry/type.hh>
 
#include <dune/localfunctions/common/virtualinterface.hh>
#include <dune/localfunctions/common/virtualwrappers.hh>
 
#include <dumux/discretization/pq1bubble/pq1bubblelocalfiniteelement.hh>
 
namespace Dumux {
 
template< class CoordScalar, class Scalar, unsigned int dim, std::size_t numCubeBubbleDofs = 1>
class PQ1BubbleFECache
{
    static_assert(dim == 2 || dim == 3, "P1/Q1 bubble FE spaces only implemented for 2D and 3D grids");
    static_assert(numCubeBubbleDofs == 1 || numCubeBubbleDofs == 2,
                    "P1/Q1 bubble FE spaces supports numCubeBubbleDofs = 1 or 2");
 
    // These are so-called non-conforming finite element spaces
    // the local basis is only continuous at given points on the faces
    using P1Bubble = Dumux::PQ1BubbleLocalFiniteElement<CoordScalar, Scalar, dim, Dune::GeometryTypes::simplex(dim).toId(), 1>;
    using Q1Bubble = Dumux::PQ1BubbleLocalFiniteElement<CoordScalar, Scalar, dim, Dune::GeometryTypes::cube(dim).toId(), numCubeBubbleDofs>;
 
public:
    using FiniteElementType = Dune::LocalFiniteElementVirtualInterface<typename P1Bubble::Traits::LocalBasisType::Traits>;
 
    PQ1BubbleFECache()
    : p1BubbleBasis_(std::make_unique<Dune::LocalFiniteElementVirtualImp<P1Bubble>>(P1Bubble{}))
    , q1BubbleBasis_(std::make_unique<Dune::LocalFiniteElementVirtualImp<Q1Bubble>>(Q1Bubble{}))
    {}

    const FiniteElementType& get(const Dune::GeometryType& gt) const
    {
        if (gt.isSimplex())
            return *p1BubbleBasis_;
        if (gt.isCube())
            return *q1BubbleBasis_;
        else
            DUNE_THROW(Dune::NotImplemented,
                "Lagrange bubble local finite element for geometry type " << gt
            );
    }
 
private:
    std::unique_ptr<FiniteElementType> p1BubbleBasis_;
    std::unique_ptr<FiniteElementType> q1BubbleBasis_;
};
 
} // end namespace Dumux
 
#endif