maxwell_3d_test_trial_integrand_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
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// 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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#ifndef fiber_maxwell_3d_test_trial_integrand_functor_hpp
#define fiber_maxwell_3d_test_trial_integrand_functor_hpp

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

#include <cassert>
#include "collection_of_3d_arrays.hpp"
#include "geometrical_data.hpp"
#include "conjugate.hpp"
#include "scalar_traits.hpp"

namespace Fiber
{

template <typename BasisFunctionType_, typename ResultType_>
class Maxwell3dTestTrialIntegrandFunctor
{
public:
    typedef BasisFunctionType_ BasisFunctionType;
    typedef ResultType_ ResultType;
    typedef typename ScalarTraits<ResultType>::RealType CoordinateType;

    void addGeometricalDependencies(size_t& geomDeps) const {
        geomDeps |= NORMALS;
    }

    ResultType evaluate(
            const ConstGeometricalDataSlice<CoordinateType>& geomData,
            const CollectionOf1dSlicesOfConst3dArrays<BasisFunctionType>& testValues,
            const CollectionOf1dSlicesOfConst3dArrays<BasisFunctionType>& trialValues) const {
        // Assert that there is at least one test and trial transformation
        // and that the dimensions of the first pair agree
        assert(testValues.size() >= 1);
        assert(trialValues.size() >= 1);
        assert(testValues[0].extent(0) == 3);
        assert(trialValues[0].extent(0) == 3);

        return -((conjugate(testValues[0](1)) * geomData.normal(2) -
                  conjugate(testValues[0](2)) * geomData.normal(1)) *
                 trialValues[0](0) +
                 (conjugate(testValues[0](2)) * geomData.normal(0) -
                  conjugate(testValues[0](0)) * geomData.normal(2)) *
                 trialValues[0](1) +
                 (conjugate(testValues[0](0)) * geomData.normal(1) -
                  conjugate(testValues[0](1)) * geomData.normal(0)) *
                 trialValues[0](2));
    }
};

} // namespace Fiber

#endif