piecewise_constant_scalar_space.hpp

// Copyright (C) 2011-2012 by the BEM++ Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#ifndef bempp_piecewise_constant_scalar_space_hpp
#define bempp_piecewise_constant_scalar_space_hpp

#include "../common/common.hpp"

#include "../grid/grid_view.hpp"
#include "../grid/grid_segment.hpp"
#include "scalar_space.hpp"
#include "../common/types.hpp"
#include "../fiber/constant_scalar_shapeset.hpp"

#include <map>
#include <memory>
#include <tbb/mutex.h>


namespace Bempp
{

class GridView;
template <typename BasisFunctionType>
class PiecewiseConstantScalarSpace : public ScalarSpace<BasisFunctionType>
{
public:
    typedef typename ScalarSpace<BasisFunctionType>::CoordinateType CoordinateType;

    explicit PiecewiseConstantScalarSpace(const shared_ptr<const Grid>& grid);

    PiecewiseConstantScalarSpace(const shared_ptr<const Grid>& grid,
                                 const GridSegment& segment);

    virtual shared_ptr<const Space<BasisFunctionType> > discontinuousSpace(
        const shared_ptr<const Space<BasisFunctionType> >& self) const;
    virtual bool isDiscontinuous() const;

    virtual bool isBarycentric() const {
        return false;
    }

    virtual shared_ptr<const Space<BasisFunctionType> > barycentricSpace(
            const shared_ptr<const Space<BasisFunctionType> >& self) const;


    virtual int domainDimension() const;
    virtual int codomainDimension() const;

    virtual ElementVariant elementVariant(const Entity<0>& element) const;
    virtual void setElementVariant(const Entity<0>& element,
                                   ElementVariant variant);

    virtual const Fiber::Shapeset<BasisFunctionType>& shapeset(
            const Entity<0>& element) const;

    virtual bool spaceIsCompatible(const Space<BasisFunctionType>& other) const;

    virtual SpaceIdentifier spaceIdentifier() const {
        return PIECEWISE_CONSTANT_SCALAR;
    }

    virtual size_t globalDofCount() const;
    virtual size_t flatLocalDofCount() const;
    virtual void getGlobalDofs(const Entity<0>& element,
                            std::vector<GlobalDofIndex>& dofs) const;
    virtual void global2localDofs(
            const std::vector<GlobalDofIndex>& globalDofs,
            std::vector<std::vector<LocalDof> >& localDofs) const;
    virtual void flatLocal2localDofs(
            const std::vector<FlatLocalDofIndex>& globalDofs,
            std::vector<LocalDof>& localDofs) const;

    virtual void getGlobalDofInterpolationPoints(
            arma::Mat<CoordinateType>& points) const;
    virtual void getNormalsAtGlobalDofInterpolationPoints(
            arma::Mat<CoordinateType>& normals) const;

    virtual void getGlobalDofPositions(
            std::vector<Point3D<CoordinateType> >& positions) const;
    virtual void getFlatLocalDofPositions(
            std::vector<Point3D<CoordinateType> >& positions) const;

    virtual void getGlobalDofBoundingBoxes(
            std::vector<BoundingBox<CoordinateType> >& bboxes) const;
    virtual void getFlatLocalDofBoundingBoxes(
            std::vector<BoundingBox<CoordinateType> >& bboxes) const;

    virtual void getGlobalDofNormals(
            std::vector<Point3D<CoordinateType> >& normals) const;
    virtual void getFlatLocalDofNormals(
            std::vector<Point3D<CoordinateType> >& normals) const;

    virtual void dumpClusterIds(
            const char* fileName,
            const std::vector<unsigned int>& clusterIdsOfGlobalDofs) const;
    virtual void dumpClusterIdsEx(
            const char* fileName,
            const std::vector<unsigned int>& clusterIdsOfGlobalDofs,
            DofType dofType) const;

private:
    void assignDofsImpl(const GridSegment& segment);

private:
    std::auto_ptr<GridView> m_view;
    GridSegment m_segment;
    Fiber::ConstantScalarShapeset<BasisFunctionType> m_shapeset;
    std::vector<std::vector<GlobalDofIndex> > m_local2globalDofs;
    std::vector<std::vector<LocalDof> > m_global2localDofs;
    mutable shared_ptr<Space<BasisFunctionType> > m_barycentricSpace;
    mutable tbb::mutex m_barycentricSpaceMutex;

};

} // namespace Bempp

#endif