general_purpose_space_time_block_preconditionable_elements.h

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// LIC// ====================================================================
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// Header file for SpaceTimeUnsteadyHeat elements
#ifndef OOMPH_GENERAL_PURPOSE_SPACETIME_BLOCK_PRECONDITIONABLE_ELEMENTS_HEADER
#define OOMPH_GENERAL_PURPOSE_SPACETIME_BLOCK_PRECONDITIONABLE_ELEMENTS_HEADER
 
// Config header generated by autoconfig
#ifdef HAVE_CONFIG_H
#include <oomph-lib-config.h>
#endif
 
// Oomph-lib headers
#include "generic/elements.h"
 
/// /////////////////////////////////////////////////////////////////////////
/// /////////////////////////////////////////////////////////////////////////
/// /////////////////////////////////////////////////////////////////////////
 
namespace oomph
{
  //======start_of_BlockPreconditionableSpaceTimeElement=========================
  /// Block preconditionable space-time element base class.
  /// NOTE: It has to derive from GeneralisedElement so that it can overload
  /// the implementation of ndof_types() in GeneralisedElement.
  //=============================================================================
  class BlockPreconditionableSpaceTimeElementBase
    : public virtual GeneralisedElement
  {
  public:
    /// Constructor (empty)
    BlockPreconditionableSpaceTimeElementBase() {}
 
    /// Destructor (empty)
    ~BlockPreconditionableSpaceTimeElementBase() {}
 
    /// Access function to assign the time slice this element lies in
    void set_time_slab_id(const int& time_slice_id)
    {
      // The time slice must be greater than -1. This happens when we use
      // an impulsive start so there are no dofs in the first time slice
      // of the first elemental time slice of the first but there are proper
      // dofs in the final time slice of the first elemental time slice.
      if (time_slice_id < -1)
      {
        // Throw an error
        throw OomphLibError(
          "Time slice ID must be greater than or equal to -1!",
          OOMPH_CURRENT_FUNCTION,
          OOMPH_EXCEPTION_LOCATION);
      }
 
      // Return the value that is currently stored
      Time_slab_id = time_slice_id;
    } // End of set_time_slab_id
 
 
    /// Access function to assign the number of dof types in the mesh
    /// NOTE: We have an access function for this as N_dof_types relies
    /// on the number of time slices in the mesh which isn't something one
    /// individual element should know...
    void set_ndof_types(const unsigned& n_dof_types)
    {
      // Return the value that is currently stored
      N_dof_types = n_dof_types;
    } // End of set_ndof_types
 
 
    /// Return the number of "DOF types" that the degrees of freedom in
    /// this element are sub-divided into
    unsigned ndof_types() const
    {
      // Return the number of dof types being used in the mesh
      return this->N_dof_types;
    } // End of ndof_types
 
 
    /// Pure virtual function to be implemented in a derived class.
    /// Create a list of pairs for all unknowns in this element,
    /// so the first entry in each pair contains the global equation
    /// number of the unknown, while the second one contains the number
    /// of the "DOF type" that this unknown is associated with.
    virtual void get_dof_numbers_for_unknowns(
      std::list<std::pair<unsigned long, unsigned>>& dof_lookup_list) const = 0;
 
  protected:
    /// The number of time slices in the mesh
    unsigned N_dof_types;
 
    /// The time slice this element lies within
    int Time_slab_id;
  };
} // End of namespace oomph
#endif