131 lines
5.1 KiB
C++
131 lines
5.1 KiB
C++
module;
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#include <cstdint>
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#include <expected>
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#include <memory>
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#include <mfem.hpp>
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#include <stdexcept>
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#include <vector>
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export module mean_field:operators.prepared_gravity_source;
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export import :fem;
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export import :field.mfem;
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export import :mapping.domain_mapper;
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export namespace mean_field::operators {
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enum class GravitySourcePreparationRejectionReason : std::uint8_t { invalid_mapping, non_finite_arithmetic };
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struct GravitySourcePreparationRejection final {
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GravitySourcePreparationRejectionReason reason{GravitySourcePreparationRejectionReason::invalid_mapping};
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mapping::MappingStatus mappingStatus{mapping::MappingStatus::valid};
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};
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using GravitySourcePreparationResult = std::expected<void, GravitySourcePreparationRejection>;
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[[noreturn]] inline void
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throwGravitySourcePreparationRejection(const GravitySourcePreparationRejection &rejection) {
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if (rejection.reason == GravitySourcePreparationRejectionReason::non_finite_arithmetic) {
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throw std::domain_error("Prepared gravity-source data contained non-finite arithmetic.");
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}
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throw std::domain_error("Prepared gravity-source data could not map the candidate geometry.");
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}
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class PreparedMappedGravitySourceOperator final : public mfem::Operator {
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public:
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PreparedMappedGravitySourceOperator(
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const fem::FEM &f,
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const mapping::DomainMapper &domain_mapper
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);
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void Prepare(const mfem::Vector &displacement);
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void PreparePrimal(const mfem::Vector &displacement);
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[[nodiscard]] GravitySourcePreparationResult TryPrepare(const mfem::Vector &displacement);
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[[nodiscard]] GravitySourcePreparationResult TryPreparePrimal(const mfem::Vector &displacement);
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void Mult(
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const mfem::Vector &density,
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mfem::Vector &action
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) const override;
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void MultDisplacementVariationTrue(
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const mfem::Vector &densityTrue,
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const mfem::Vector &displacementVariationTrue,
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mfem::Vector &actionVariationTrue
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) const;
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[[nodiscard]] bool IsPrepared() const noexcept;
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[[nodiscard]] bool HasVariationData() const noexcept;
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[[nodiscard]] std::uint64_t GetPreparationCount() const noexcept;
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[[nodiscard]] const field::FieldDofMap &GetDensityMap() const noexcept;
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[[nodiscard]] const field::FieldDofMap &GetPotentialMap() const noexcept;
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[[nodiscard]] const field::FieldDofMap &GetDisplacementMap() const noexcept;
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void MultTranspose(
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const mfem::Vector &potential,
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mfem::Vector &action
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) const override;
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private:
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enum class PreparationMode : std::uint8_t { primal, linearization };
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struct ElementPAData {
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int element_id{-1};
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mfem::Array<int> density_dofs;
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mfem::Array<int> potential_dofs;
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mfem::Array<int> displacement_dofs;
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mfem::DofTransformation *density_dof_transformation{nullptr};
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mfem::DofTransformation *potential_dof_transformation{nullptr};
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mfem::DofTransformation *displacement_dof_transformation{nullptr};
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const mfem::IntegrationRule *integration_rule{nullptr};
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// Rows are quadrature points; columns are element DOFs.
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mfem::DenseMatrix density_basis;
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mfem::DenseMatrix potential_basis;
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mfem::DenseMatrix inverse_element_jacobians;
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// Contains quadrature weight, mesh Jacobian, mapped Jacobian,
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// and 4*pi*G.
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mfem::Vector quadrature_data;
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};
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[[nodiscard]] GravitySourcePreparationResult TryPrepareImpl(
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const mfem::Vector &displacement,
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PreparationMode mode
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);
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const fem::FEM &m_fem;
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const mapping::DomainMapper &m_domain_mapper;
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field::FieldDofMap m_density_map;
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field::FieldDofMap m_potential_map;
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field::FieldDofMap m_displacement_map;
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mfem::Array<int> m_stellar_marker;
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std::vector<ElementPAData> m_elements;
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mutable mfem::Vector m_density_true;
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mutable mfem::Vector m_potential_true;
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mutable mfem::Vector m_action_true;
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mutable mfem::Vector m_potential_local;
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mutable mfem::Vector m_local_action;
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mutable mfem::Vector m_element_input;
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mutable mfem::Vector m_quadrature_action;
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mutable mfem::Vector m_element_action;
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mutable mfem::Vector m_density_local;
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mutable mfem::Vector m_displacement_variation_local;
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mutable mfem::Vector m_local_variation_action;
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mutable mfem::Vector m_element_density;
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mutable mfem::Vector m_element_displacement_variation;
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mutable mfem::Vector m_quadrature_variation_action;
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mutable mfem::Vector m_element_variation_action;
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mutable mfem::DenseMatrix m_reference_displacement_dshape;
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mutable mfem::DenseMatrix m_reference_displacement_jacobian;
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mfem::Vector m_displacement_true;
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std::uint64_t m_preparation_count{0};
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bool m_is_prepared{false};
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bool m_has_variation_data{false};
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};
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} // namespace mean_field::operators
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