zzerrorestimator.h

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/*
 *
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 *            ##   ##  ##   ##  ##      ##      ##     ##
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 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2025   Borek Patzak
 *
 *
 *
 *       Czech Technical University, Faculty of Civil Engineering,
 *   Department of Structural Mechanics, 166 29 Prague, Czech Republic
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef zzerrorestimator_h
#define zzerrorestimator_h
 
#include "errorestimator.h"
#include "interface.h"
#include "internalstatetype.h"
#include "floatarray.h"
#include "statecountertype.h"
#include "element.h"
#include "integrationrule.h"
#include "remeshingcrit.h"


#define _IFT_ZZErrorEstimator_Name "zz"
#define _IFT_ZZErrorEstimator_normtype "normtype"
#define _IFT_ZZErrorEstimator_recoverytype "recoverytype"


#define _IFT_ZZRemeshingCriteria_requirederror "requirederror"
#define _IFT_ZZRemeshingCriteria_minelemsize "minelemsize"
 
namespace oofem {
#define ZZErrorEstimator_ElementResultCashed
 
class Element;
class GaussPoint;

class ZZErrorEstimator : public ErrorEstimator
{
public:
    enum NormType { L2Norm, EnergyNorm };
    enum NodalRecoveryType { ZZRecovery, SPRRecovery };
 
protected:
    double globalENorm;
    double globalSNorm;
    double globalErrorEstimate;
#ifdef ZZErrorEstimator_ElementResultCashed
    FloatArray eNorms;
#endif
    NormType normType;
    NodalRecoveryType nodalRecoveryType;

    StateCounterType stateCounter;
 
public:
    ZZErrorEstimator(int n, Domain * d) : ErrorEstimator(n, d) {
        eeType = EET_ZZEE;
        stateCounter = 0;
        normType = L2Norm;
        nodalRecoveryType = ZZRecovery;
    }

    virtual ~ZZErrorEstimator() { }
 
    double giveElementError(EE_ErrorType type, Element *elem, TimeStep *tStep) override;
    double giveValue(EE_ValueType type, TimeStep *tStep) override;
 
    int estimateError(EE_ErrorMode mode, TimeStep *tStep) override;
    RemeshingCriteria *giveRemeshingCrit() override;
 
    void initializeFrom(InputRecord &ir) override;
    const char *giveClassName() const override { return "ZZErrorEstimator"; }
    const char *giveInputRecordName() const override { return _IFT_ZZErrorEstimator_Name; }
};
 

class ZZErrorEstimatorInterface : public Interface
{
private:
    Element *element;
 
public:
    ZZErrorEstimatorInterface(Element *element): element(element) { }

    virtual void ZZErrorEstimatorI_computeElementContributions(double &eNorm, double &sNorm, ZZErrorEstimator :: NormType norm,
                                                               InternalStateType type, TimeStep *tStep);
    virtual IntegrationRule *ZZErrorEstimatorI_giveIntegrationRule() {
        return this->element->giveDefaultIntegrationRulePtr();
    }

    virtual void ZZErrorEstimatorI_computeLocalStress(FloatArray &answer, FloatArray &sig) {
        answer = sig;
    }
};
 

class ZZRemeshingCriteria : public RemeshingCriteria
{
public:
    enum ZZRemeshingCriteriaModeType { stressBased };
 
protected:
    FloatArray nodalDensities;
    RemeshingStrategy remeshingStrategy;
    StateCounterType stateCounter;
    ZZRemeshingCriteriaModeType mode;
    double requiredError;
    double minElemSize;
 
public:
    ZZRemeshingCriteria(int n, ErrorEstimator * e);
    virtual ~ZZRemeshingCriteria() { }
 
    double giveRequiredDofManDensity(int num, TimeStep *tStep, int relative = 0) override;
    double giveDofManDensity(int num) override;
    RemeshingStrategy giveRemeshingStrategy(TimeStep *tStep) override;
    int estimateMeshDensities(TimeStep *tStep) override;
    void initializeFrom(InputRecord &ir) override;
 
    const char *giveInputRecordName() const override { return nullptr; }
    const char *giveClassName() const override { return "ZZErrorEstimator"; }
};
 
} // end namespace oofem
#endif // zzerrorestimator_h