load.h

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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 load_h
#define load_h
 
#include "generalboundarycondition.h"
#include "gausspoint.h"
#include "intarray.h"
#include "floatarray.h"
#include "valuemodetype.h"
#include "error.h"


#define _IFT_Load_components "components"
#define _IFT_Load_dofexcludemask "dofexcludemask"
#define _IFT_Load_reference "reference"
 
namespace oofem {
class OOFEM_EXPORT Load : public GeneralBoundaryCondition
{
public:
    enum CoordSystType {
        CST_Global, 
        CST_Local, 
        CST_UpdatedGlobal, 
    };

    enum FormulationType {
        FT_Entity,
        FT_Global,
    };
 
protected:
    FloatArray componentArray;
    IntArray dofExcludeMask;
 
public:
    // Marks the BC as a reference load. 
    bool reference;

    Load(int n, Domain * d);
    virtual ~Load() { }

    virtual void computeComponentArrayAt(FloatArray &answer, TimeStep *tStep, ValueModeType mode);
    virtual void computeValueAt(FloatArray &answer, TimeStep *tStep, const FloatArray &coords, ValueModeType mode) = 0;
    virtual void computeValueAt(FloatArray &answer, TimeStep *tStep, GaussPoint* gp, ValueModeType mode) {
        if (this->giveFormulationType() == FT_Entity) {
            this->computeValueAt(answer, tStep, gp->giveNaturalCoordinates(), mode);
        } else {
            this->computeValueAt(answer, tStep, gp->giveGlobalCoordinates(), mode);
        }
    }

    virtual void computeValues(FloatArray &answer, TimeStep *tStep, const FloatArray &coords, const IntArray &dofids, ValueModeType mode);
    int isDofExcluded(int index);
 
    void scale(double s) override;

    virtual CoordSystType giveCoordSystMode() { return CST_Global; }
    virtual FormulationType giveFormulationType() { return FT_Entity; }
    virtual int giveApproxOrder() { return 0; }
    virtual double giveProperty(int aProperty, TimeStep *tStep) const override {
        OOFEM_ERROR("Not supported for this boundary condition.");
    }
 
    void initializeFrom(InputRecord &ir) override;
    void giveInputRecord(DynamicInputRecord &input) override;

    const FloatArray &giveComponentArray() const;
    void setComponentArray(FloatArray &arry) { componentArray = std::move(arry); }
 
    void saveContext(DataStream &stream, ContextMode mode) override;
    void restoreContext(DataStream &stream, ContextMode mode) override;
};
} // end namespace oofem
#endif // load_h