ElementInterface.h

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#pragma once
#include <eigen3/Eigen/Core>
#include "nuto/mechanics/interpolation/TypeDefs.h"

namespace NuTo
{

class ElementInterface
{
public:
    virtual ~ElementInterface() noexcept = default;

    virtual Eigen::VectorXd ExtractNodeValues(int instance = 0) const = 0;

    virtual int GetDofDimension() const = 0;

    virtual Eigen::VectorXi GetDofNumbering() const = 0;
    virtual int GetNumNodes() const = 0;
    virtual Eigen::MatrixXd GetNMatrix(NaturalCoords ipCoords) const = 0;
    virtual Eigen::VectorXd GetShapeFunctions(NaturalCoords ipCoords) const = 0;
    virtual Eigen::MatrixXd GetDerivativeShapeFunctions(NaturalCoords ipCoords) const = 0;
};

inline Eigen::VectorXd Interpolate(const ElementInterface& element, NaturalCoords ipCoords)
{
    return element.GetNMatrix(ipCoords) * element.ExtractNodeValues();
}


} /* NuTo */