Estimator.h 9.62 KB
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// ============================================================================
// ==                                                                        ==
// == AMDiS - Adaptive multidimensional simulations                          ==
// ==                                                                        ==
// ============================================================================
// ==                                                                        ==
// ==  crystal growth group                                                  ==
// ==                                                                        ==
// ==  Stiftung caesar                                                       ==
// ==  Ludwig-Erhard-Allee 2                                                 ==
// ==  53175 Bonn                                                            ==
// ==  germany                                                               ==
// ==                                                                        ==
// ============================================================================
// ==                                                                        ==
// ==  http://www.caesar.de/cg/AMDiS                                         ==
// ==                                                                        ==
// ============================================================================

/** \file Estimator.h */

/** \defgroup Estimator Estimator module
 * @{ <img src="estimator.png"> @}
 */

#ifndef AMDIS_ESTIMATOR_H
#define AMDIS_ESTIMATOR_H

#include "Flag.h"
#include "Global.h"
#include "FixVec.h"
#include "SystemVector.h"
#include "CreatorInterface.h"

namespace AMDiS {

  class ElInfo;
  class Quadrature;
  class FastQuadrature;
  class BasisFunction;

  class ProblemInstat;
  template<typename T> class DOFVector;
  class RobinBC;
  class DOFMatrix;

  /** \brief
   * Returns residual square at quadrature point. Not Member of
   * Estimator to avoid multiple instantiation.
   */
  void r(const ElInfo              *elInfo,
	 int                        numPoints,
	 const double              *uhIq,
	 const WorldVector<double> *grdUhIq,
	 const WorldMatrix<double> *D2UhIq,
	 const double              *uhOldIq,
	 const WorldVector<double> *grdUhOldIq,
	 const WorldMatrix<double> *D2UhOldIq,
	 DOFMatrix *A, 
	 DOFVector<double> *fh,
	 Quadrature *quad,
	 double *result);
 
  /** \brief
   * Returns pow(det,2.0/dim). Not Member of
   * Estimator to avoid multiple instantiation.
   */
  inline double h2_from_det(double det, int dim) {
    return pow(det,2.0/dim);
  };


  // ============================================================================
  // ===== class Estimator ======================================================
  // ============================================================================

  /**
   * \ingroup Estimator
   * 
   * \brief
   * Estimator for scalar problems.
   */
  class Estimator
  {
  public:
    MEMORY_MANAGED(Estimator);

    Estimator() {};

    /** \brief
     * Constructor.
     */
    Estimator(::std::string name_, int r);

    /** \brief
     * destructor
     */
    virtual ~Estimator() {};

    /** \brief
     * Returns \ref name of the Estimator
     */
    inline const ::std::string& getName() const { 
      return name; 
    };

    /** \brief
     * Performs the estimation and returns the final \ref est_sum
     */
    virtual double estimate(double timestep = 0.0);

    virtual void init(double timestep) {};

    virtual void estimateElement(ElInfo *elInfo) {};

    virtual void exit() {};

    /** \brief
     * Returns \ref est_sum of the Estimator
     */
    inline double getErrorSum() const { 
      return est_sum; 
    };

    /** \brief
     * Sets \ref est_sum of the Estimator
     */
    inline void setErrorSum(double sum) { 
      est_sum = sum; 
    };

    /** \brief
     * Returns \ref est_max of the Estimator
     */
    inline double getErrorMax() const { 
      return est_max; 
    };

    /** \brief
     * Returns the estimated time error.
     */
    virtual double getTimeEst() const { 
      return est_t_sum; 
    };

    /** \brief
     * Returns the maximal time estimation.
     */
    virtual double getTimeEstMax() const { 
      return est_t_max; 
    };

    /** \brief
     * Sets \ref est_max of the Estimator
     */
    inline void setErrorMax(double m) { 
      est_max = m; 
    };

    /** \brief
     * Returns \ref norm.
     */
    inline Norm getErrorNorm() { 
      return norm; 
    };

    /** \brief
     * Adds one system to the estimator.
     */
    void addSystem(DOFMatrix         *matrix_,
		   DOFVector<double> *uh_,
		   DOFVector<double> *fh_,
		   DOFVector<double> *uhOld_ = NULL)
    {
      matrix.push_back(matrix_);
      uh.push_back(uh_);
      fh.push_back(fh_);
      uhOld.push_back(uhOld_);
    };

    /** \brief
     * Adds pointer to old solution to the given system.
     */
    void addUhOldToSystem(int system, DOFVector<double> *uhOld_) 
    {
      TEST_EXIT(static_cast<int>(uhOld.size()) > system)("invalid system\n");
      TEST_EXIT(uhOld[system] == NULL)("there is already an uhOld\n");
      uhOld[system] = uhOld_;
    }

    /** \brief
     * Returns number of systems.
     */
    inline int getNumSystems() { 
      return static_cast<int>(matrix.size()); 
    };

    inline Flag getTraverseFlag() { return traverseFlag; };
    inline Mesh* getMesh() { return mesh; };

    inline int getRow() { return row; };  

  protected:
    /** \brief
     * Name of the Estimator
     */
    ::std::string name;

    /** \brief
     * Used norm
     */
    Norm norm;
 
    /** \brief
     * Sum of all error estimates
     */
    double est_sum;

    /** \brief
     * Sum of all time error estimates
     */
    double est_t_sum;

    /** \brief
     * Max of all time error estimates
     */
    double est_t_max;

    /** \brief
     * Maximal error estimate
     */
    double est_max;

    /** \brief
     * Vector of DOFMatrix pointers. There can be more than one
     * DOFMatrix, if the Estimator is part of a vector valued 
     * estimator. Then it contains also coupling matrices
     * of the different vector components.
     */ 
    ::std::vector<DOFMatrix*> matrix;

    /** \brief
     * Vector of solution vectors for the different systems.
     */
    ::std::vector<DOFVector<double>*> uh;

    /** \brief
     * Vector of old solutions vectors for the different systems. 
     * Used for instationary problems.
     */
    ::std::vector<DOFVector<double>*> uhOld;

    /** \brief
     * Vector of RHS vectors for the different systems.
     */
    ::std::vector<DOFVector<double>*> fh;

    /** \brief
     * Used, if the scalar estimator builds one row of a vector valued estimator.
     * Then row gives the position in the vector valued estimator, used
     * for calculation of the time derivative.
     */
    int row;

    Flag traverseFlag;

    Mesh *mesh;

    double timestep;
  };

  // ============================================================================
  // ===== class EstimatorCreator ===============================================
  // ============================================================================

  /** 
   * \ingroup Estimator
   *
   * \brief
   * Interface for creators of concrete estimators. 
   */
  class EstimatorCreator : public CreatorInterface<Estimator>
  { 
  public:
    /** \brief
     * constructor
     */
    EstimatorCreator() : row(-1) {};

    /** \brief
     * destructor
     */
    virtual ~EstimatorCreator() {};

    /** \brief
     * Sets \ref name
     */
    void setName(::std::string name_) { name = name_; };

    /** \brief
     * Sets \ref row
     */
    void setRow(int r) { row = r; };  

  protected:
    /** \brief
     * Name of the estimator to be created.
     */
    ::std::string name;

    /** \brief
     * Row of the estimator.
     */
    int row;
  };

  // ============================================================================
  // ===== class ResidualEstimator ==============================================
  // ============================================================================

  /**
   * \ingroup Estimator
   * 
   * \brief
   * Estimator for scalar problems.
   */
  class ResidualEstimator : public Estimator
  {
  public:
    MEMORY_MANAGED(ResidualEstimator);

    /** \brief
     * Creator class used in the OEMSolverMap.
     */
    class Creator : public EstimatorCreator
    {
    public:
      MEMORY_MANAGED(Creator);

      Creator() : EstimatorCreator() {};

      virtual ~Creator() {};

      /** \brief
       * Returns a new ODirSolver object.
       */   
      Estimator* create() { 
	return NEW ResidualEstimator(name, row);
      };
    };
  

    /** \brief
     * Constructor.
     */
    ResidualEstimator(::std::string name, int r);

    virtual void init(double timestep);

    virtual void estimateElement(ElInfo *elInfo);

    virtual void exit();

    /*   /\** \brief */
    /*    * Implements \ref Estimator::estimate(). */
    /*    *\/ */
    /*   virtual double estimate(double timestep = 0.0); */

  protected:
    /** \brief
     * Constant in front of element residual
     */
    double C0;
 
    /** \brief
     * Constant in front of edge/face residual
     */
    double C1;

    /** \brief
     * Constant in front of coarsening term
     */
    double C2;

    /** \brief
     * Constant in fromt of the time
     */
    double C3;

    int numSystems;
    int numPoints;
    int system;
    int dim;
    int degree;
    Quadrature *quad;
    FastQuadrature **quadFast;
    const BasisFunction **basFcts;

    double **uhEl;
    double **uhOldEl;
    double *uhQP;
    double *uhOldQP;
    double *riq;
  };

}

#endif // AMDIS_ESTIMATOR_H