GradientOperator.h

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#ifndef included_AMP_GradientOperator
#define included_AMP_GradientOperator
 
 
#include "AMP/discretization/createLibmeshElements.h"
#include "AMP/operators/Operator.h"
 
 
namespace AMP::Operator {
 
 
class GradientOperator : public Operator
{
public:
    GradientOperator( void );
 
    explicit GradientOperator( std::shared_ptr<const OperatorParameters> params );
 
    virtual ~GradientOperator() {}
 
    std::string type() const override { return "GradientOperator"; }
 
    void reset( std::shared_ptr<const OperatorParameters> params ) override;
 
    void apply( AMP::LinearAlgebra::Vector::const_shared_ptr u,
                AMP::LinearAlgebra::Vector::shared_ptr f ) override;
 
 
    std::shared_ptr<AMP::LinearAlgebra::Variable> getOutputVariable() const override
    {
        return d_outputVar;
    }
 
    std::shared_ptr<AMP::LinearAlgebra::Variable> getInputVariable() const override
    {
        return d_inputVar;
    }
 
private:
    std::shared_ptr<AMP::Database> d_db;
    std::shared_ptr<AMP::LinearAlgebra::Variable> d_inputVar, d_outputVar;
    AMP::Discretization::createLibmeshElements d_elem;
    std::vector<AMP::Mesh::MeshElementID> d_nodes;
    std::vector<int> d_elementsPerNode;
};
 
 
} // namespace AMP::Operator
 
#endif