freeconstantsurfaceload.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 constantsurfaceload_h
#define constantsurfaceload_h
 
#include "boundaryload.h"


#define _IFT_FreeConstantSurfaceLoad_LoadOffset "loadoffset"
#define _IFT_FreeConstantSurfaceLoad_Name "freeconstantsurfaceload"
 
// #define _IFT_ConstantSurfaceLoad_Name "constantsurfaceload"
 
namespace oofem {
class OOFEM_EXPORT FreeConstantSurfaceLoad : public SurfaceLoad
{
public:
    FreeConstantSurfaceLoad(int i, Domain * d);
 
    // Overloaded methods:
    void computeValueAt(FloatArray &answer, TimeStep *tStep, const FloatArray &coords, ValueModeType mode) override;
    int giveApproxOrder() override { return 0; }

    void updateLoad(const FloatArray &newValue) { componentArray = newValue; }
 
    void initializeFrom(InputRecord &ir) override;
    void giveInputRecord(DynamicInputRecord &input) override;
    bcGeomType giveBCGeoType() const override { return SurfaceLoadBGT; }
 
    const char *giveClassName() const override { return "FreeConstantSurfaceLoad"; }
    const char *giveInputRecordName() const override { return _IFT_FreeConstantSurfaceLoad_Name; }
    double giveLoadOffset() { return this->loadOffset; }
 
    bool isImposed(TimeStep *tStep) override;
 
private:
    void computeNArray(FloatArray &answer, const FloatArray &coords) const override { answer.clear(); }
    double loadOffset;  // xi-coord offset of load. xi=-1 -> bottom, xi=0 -> midsurface (default), xi=1 -> top surface
    bool alreadyDisabled = false;
};
} // end namespace oofem
#endif // constantsurfaceload_h