cl_IF_InterpolationFunction.hpp

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/*
 * BELFEM -- The Berkeley Lab Finite Element Framework
 * Copyright (c) 2026, The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory (subject to receipt of any required
 * approvals from the U.S. Dept. of Energy).  All rights reserved.
 *
 * Developers: Christian Messe, Gregory Giard
 *
 * See the top-level LICENSE file for the complete license and disclaimer.
 */
 
#ifndef BELFEM_CL_IF_INTERPOLATIONFUNCTION_HPP
#define BELFEM_CL_IF_INTERPOLATIONFUNCTION_HPP
 
#include "typedefs.hpp"
#include "Mesh_Enums.hpp"
#include "cl_Vector.hpp"
#include "cl_Matrix.hpp"
 
namespace belfem
{
    namespace fem
    {
         class InterpolationFunction
         {
//------------------------------------------------------------------------------
         public:
//------------------------------------------------------------------------------

            InterpolationFunction() = default;
 
//------------------------------------------------------------------------------

            virtual ~InterpolationFunction() = default;
 
//------------------------------------------------------------------------------

            virtual void
            param_coords( Matrix< real > & aXiHat ) const = 0;
 
//------------------------------------------------------------------------------

            virtual void
            N( const Vector< real > & aXi,
                     Matrix< real > & aN  ) const = 0;
 
//------------------------------------------------------------------------------

            virtual void
            dNdXi( const Vector< real > & aXi,
                         Matrix< real > & adNdXi  ) const = 0;
 
//------------------------------------------------------------------------------

            virtual void
            d2NdXi2( const Vector< real > & aXi,
                           Matrix< real > & ad2NdXi2  ) const = 0;
 
//------------------------------------------------------------------------------

            virtual uint
            number_of_bases() const = 0;
 
//------------------------------------------------------------------------------

            virtual uint
            number_of_dimensions() const = 0;
 
//------------------------------------------------------------------------------

            virtual InterpolationOrder
            interpolation_order() const = 0;
 
//------------------------------------------------------------------------------

             virtual InterpolationType
             interpolation_type() const = 0;
 
//------------------------------------------------------------------------------

            virtual GeometryType
            geometry_type() const = 0;
 
//------------------------------------------------------------------------------

            virtual ElementType
            element_type() const = 0;
 
//------------------------------------------------------------------------------
        };
//------------------------------------------------------------------------------
    } /* end namespace fem */
}  /* end namespace belfem */
#endif //BELFEM_CL_IF_INTERPOLATIONFUNCTION_HPP