elementary_potential_operator.hpp

// Copyright (C) 2011-2012 by the BEM++ Authors
//
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// 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.
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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#ifndef bempp_elementary_potential_operator_hpp
#define bempp_elementary_potential_operator_hpp

#include "potential_operator.hpp"

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

namespace Fiber
{

template <typename CoordinateType> class CollectionOfBasisTransformations;
template <typename CoordinateType> class CollectionOfShapesetTransformations;
template <typename KernelType> class CollectionOfKernels;
template <typename BasisFunctionType, typename KernelType, typename ResultType>
class KernelTrialIntegral;
template <typename ResultType> class EvaluatorForIntegralOperators;
template <typename ResultType> class LocalAssemblerForPotentialOperators;
} // namespace Bempp

namespace Bempp
{

template <typename ValueType> class DiscreteBoundaryOperator;
template <typename BasisFunctionType_, typename KernelType_, typename ResultType_>
class ElementaryPotentialOperator :
        public PotentialOperator<BasisFunctionType_, ResultType_>
{
    typedef PotentialOperator<BasisFunctionType_, ResultType_> Base;
public:
    typedef typename Base::BasisFunctionType BasisFunctionType;
    typedef KernelType_ KernelType;
    typedef typename Base::ResultType ResultType;
    typedef typename Base::CoordinateType CoordinateType;
    typedef typename Base::QuadratureStrategy QuadratureStrategy;
    typedef Fiber::EvaluatorForIntegralOperators<ResultType> Evaluator;
    typedef Fiber::LocalAssemblerForPotentialOperators<ResultType> LocalAssembler;
    typedef Fiber::CollectionOfShapesetTransformations<CoordinateType>
    CollectionOfShapesetTransformations;
    typedef Fiber::CollectionOfShapesetTransformations<CoordinateType>
    CollectionOfBasisTransformations;
    typedef Fiber::CollectionOfKernels<KernelType> CollectionOfKernels;
    typedef Fiber::KernelTrialIntegral<BasisFunctionType, KernelType, ResultType>
    KernelTrialIntegral;

    virtual std::auto_ptr<InterpolatedFunction<ResultType_> > evaluateOnGrid(
            const GridFunction<BasisFunctionType, ResultType>& argument,
            const Grid& evaluationGrid,
            const QuadratureStrategy& quadStrategy,
            const EvaluationOptions& options) const;

    virtual arma::Mat<ResultType_> evaluateAtPoints(
            const GridFunction<BasisFunctionType, ResultType>& argument,
            const arma::Mat<CoordinateType>& evaluationPoints,
            const QuadratureStrategy& quadStrategy,
            const EvaluationOptions& options) const;

    virtual AssembledPotentialOperator<BasisFunctionType_, ResultType_>
    assemble(
            const shared_ptr<const Space<BasisFunctionType> >& space,
            const shared_ptr<const arma::Mat<CoordinateType> >& evaluationPoints,
            const QuadratureStrategy& quadStrategy,
            const EvaluationOptions& options) const;

    virtual int componentCount() const;

private:
    virtual const CollectionOfKernels& kernels() const = 0;
    virtual const CollectionOfBasisTransformations&
    trialTransformations() const = 0;
    virtual const KernelTrialIntegral& integral() const = 0;

    std::auto_ptr<Evaluator> makeEvaluator(
            const GridFunction<BasisFunctionType, ResultType>& argument,
            const QuadratureStrategy& quadStrategy,
            const EvaluationOptions& options) const;

    std::auto_ptr<LocalAssembler> makeAssembler(
            const Space<BasisFunctionType>& space,
            const arma::Mat<CoordinateType>& evaluationPoints,
            const QuadratureStrategy& quadStrategy,
            const EvaluationOptions& options) const;

    shared_ptr<DiscreteBoundaryOperator<ResultType_> > assembleOperator(
            const Space<BasisFunctionType>& space,
            const arma::Mat<CoordinateType>& evaluationPoints,
            LocalAssembler& assembler,
            const EvaluationOptions& options) const;

    std::auto_ptr<DiscreteBoundaryOperator<ResultType_> >
    assembleOperatorInDenseMode(
            const Space<BasisFunctionType>& space,
            const arma::Mat<CoordinateType>& evaluationPoints,
            LocalAssembler& assembler,
            const EvaluationOptions& options) const;

    std::auto_ptr<DiscreteBoundaryOperator<ResultType_> >
    assembleOperatorInAcaMode(
            const Space<BasisFunctionType>& space,
            const arma::Mat<CoordinateType>& evaluationPoints,
            LocalAssembler& assembler,
            const EvaluationOptions& options) const;
};

} // namespace Bempp

#endif