initial_values.h

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//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Copyright (C) 2020 - 2024 by the ryujin authors
//
 
#pragma once
 
#include <compile_time_options.h>
 
#include "initial_state_library.h"
#include "offline_data.h"
 
#include <deal.II/base/parameter_acceptor.h>
#include <deal.II/base/tensor.h>
 
#include <functional>
 
namespace ryujin
{
  template <typename Description, int dim, typename Number = double>
  class InitialValues : public dealii::ParameterAcceptor
  {
  public:
    using HyperbolicSystem = typename Description::HyperbolicSystem;
 
    using View =
        typename Description::template HyperbolicSystemView<dim, Number>;
 
    static constexpr unsigned int problem_dimension = View::problem_dimension;
 
    using state_type = typename View::state_type;
 
    using vector_type = MultiComponentVector<Number, problem_dimension>;
 
    static constexpr unsigned int n_precomputed_values =
        View::n_precomputed_initial_values;
 
    using precomputed_state_type = typename View::precomputed_state_type;
 
    InitialValues(const HyperbolicSystem &hyperbolic_system,
                  const OfflineData<dim, Number> &offline_data,
                  const std::string &subsection = "/InitialValues");
 
 
    void parse_parameters_callback();
 
 
    DEAL_II_ALWAYS_INLINE inline state_type
    initial_state(const dealii::Point<dim> &point, Number t) const
    {
      return initial_state_(point, t);
    }
 
 
    vector_type interpolate(Number t = 0) const;
 
 
    DEAL_II_ALWAYS_INLINE inline precomputed_state_type
    flux_contributions(const dealii::Point<dim> &point) const
    {
      return flux_contributions_(point);
    }
 
 
    MultiComponentVector<Number, n_precomputed_values>
    interpolate_precomputed_initial_values() const;
 
  private:
 
    std::string configuration_;
 
    dealii::Point<dim> initial_position_;
 
    dealii::Tensor<1, dim> initial_direction_;
 
    Number perturbation_;
 
 
 
    dealii::SmartPointer<const HyperbolicSystem> hyperbolic_system_;
    dealii::SmartPointer<const OfflineData<dim, Number>> offline_data_;
 
    typename InitialStateLibrary<Description, dim, Number>::
        initial_state_list_type initial_state_list_;
 
    std::function<state_type(const dealii::Point<dim> &point, Number t)>
        initial_state_;
 
    std::function<precomputed_state_type(const dealii::Point<dim> &point)>
        flux_contributions_;
 
  };
 
} /* namespace ryujin */