AssemblerUtils.hpp

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#pragma once
 
#include <polyfem/assembler/Assembler.hpp>
#include <polyfem/basis/ElementBases.hpp>
#include <polyfem/utils/AutodiffTypes.hpp>
#include <polyfem/utils/MatrixUtils.hpp>
 
namespace polyfem::assembler
{
 
    class AssemblerUtils
    {
    public:
        static std::string other_assembler_name(const std::string &formulation);
 
        static std::shared_ptr<Assembler> make_assembler(const std::string &formulation);
        static std::shared_ptr<MixedAssembler> make_mixed_assembler(const std::string &formulation);
 
        enum class BasisType
        {
            SIMPLEX_LAGRANGE,
            CUBE_LAGRANGE,
            SPLINE,
            POLY
        };
 
        AssemblerUtils() = delete;
 
        static void merge_mixed_matrices(
            const int n_bases, const int n_pressure_bases, const int problem_dim, const bool add_average,
            const StiffnessMatrix &velocity_stiffness, const StiffnessMatrix &mixed_stiffness, const StiffnessMatrix &pressure_stiffness,
            StiffnessMatrix &stiffness);
        
        static int quadrature_order(const std::string &assembler, const int basis_degree, const BasisType &b_type, const int dim);
    };
} // namespace polyfem::assembler