hdiv_function_value_functor.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.
//
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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 fiber_hdiv_function_value_functor_hpp
#define fiber_hdiv_function_value_functor_hpp

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

#include "basis_data.hpp"
#include "geometrical_data.hpp"
#include "collection_of_3d_arrays.hpp"
#include "shape_transformation_functor_wrappers.hpp"

namespace Fiber
{

template <typename CoordinateType_>
class HdivFunctionValueElementaryFunctor
{
public:
    typedef CoordinateType_ CoordinateType;

    int argumentDimension() const { return 2; }
    int resultDimension() const { return 3; }

    void addDependencies(size_t& basisDeps, size_t& geomDeps) const {
        basisDeps |= VALUES;
        geomDeps |= INTEGRATION_ELEMENTS | JACOBIANS_TRANSPOSED;
    }

    template <typename ValueType>
    void evaluate(
            const ConstBasisDataSlice<ValueType>& basisData,
            const ConstGeometricalDataSlice<CoordinateType>& geomData,
            _1dSliceOf3dArray<ValueType>& result) const {
        assert(basisData.componentCount() == argumentDimension());
        assert(result.extent(0) == resultDimension());
        for (int rdim = 0; rdim < resultDimension(); ++rdim)
            result(rdim) =
                (geomData.jacobianTransposed(0, rdim) * basisData.values(0) +
                 geomData.jacobianTransposed(1, rdim) * basisData.values(1)) /
                geomData.integrationElement();
    }
};

// Note: in C++11 we'll be able to make a "template typedef", or more precisely
// a using declaration, instead of this spurious inheritance
template <typename CoordinateType_>
class HdivFunctionValueFunctor :
        public ElementaryShapeTransformationFunctorWrapper<
        HdivFunctionValueElementaryFunctor<CoordinateType_> >
{
public:
    typedef CoordinateType_ CoordinateType;
};

} // namespace Fiber

#endif