LocalRelaxationData.hpp

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#pragma once
 
#include <polyfem/legacy/State.hpp>
#include <polyfem/mesh/Mesh.hpp>
#include <polyfem/mesh/LocalBoundary.hpp>
#include <polyfem/mesh/remesh/wild_remesh/LocalMesh.hpp>
 
namespace polyfem::mesh
{
    using State = polyfem::legacy::State;
 
    // Things needed for the local relaxation solve
    template <typename M>
    class LocalRelaxationData
    {
    public:
        LocalRelaxationData(
            const State &state,
            LocalMesh<M> &local_mesh,
            const double current_time,
            const bool contact_enabled);
 
        Eigen::MatrixXd sol() const
        {
            return utils::flatten(local_mesh.displacements());
        }
 
        bool is_volume() const { return mesh->is_volume(); }
        int dim() const { return mesh->dimension(); }
        int n_bases() const { return m_n_bases; }
        int ndof() const { return dim() * n_bases(); }
        int n_free_dof() const { return ndof() - boundary_nodes.size(); }
 
        solver::SolveData solve_data;
 
        LocalMesh<M> &local_mesh;
 
    private:
        void init_mesh(const State &state);
        void init_bases(const State &state);
        void init_boundary_conditions(const State &state);
        void init_assembler(const State &state);
        void init_mass_matrix(const State &state);
        void init_solve_data(
            const State &state,
            const double current_time,
            const bool contact_enabled);
 
        // Mesh data
        std::unique_ptr<Mesh> mesh;
 
        // Basis data
        int m_n_bases;
        std::vector<polyfem::basis::ElementBases> bases;
 
        std::shared_ptr<assembler::Assembler> assembler;
        assembler::AssemblyValsCache assembly_vals_cache;
 
        std::shared_ptr<assembler::Mass> mass_matrix_assembler;
        assembler::AssemblyValsCache mass_assembly_vals_cache;
        Eigen::SparseMatrix<double> mass;
 
        std::shared_ptr<assembler::PressureAssembler> pressure_assembler;
 
        std::shared_ptr<assembler::Problem> problem;
 
        std::vector<int> boundary_nodes;
        std::vector<mesh::LocalBoundary> local_boundary;
        std::vector<mesh::LocalBoundary> local_neumann_boundary;
        std::vector<mesh::LocalBoundary> local_pressure_boundary;
        std::vector<int> dirichlet_nodes;
        std::vector<RowVectorNd> dirichlet_nodes_position;
        std::vector<int> neumann_nodes;
        std::vector<RowVectorNd> neumann_nodes_position;
        // per node pressure
        std::unordered_map<int, std::vector<LocalBoundary>> local_pressure_cavity;
        std::vector<int> pressure_boundary_nodes;
 
        Eigen::MatrixXd rhs;
 
        ipc::CollisionMesh collision_mesh;
    };
} // namespace polyfem::mesh