iga.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 iga_h
#define iga_h
 
#include "inputrecord.h"
#include "intarray.h"
#include "feinterpol.h"
#include "gaussintegrationrule.h"


#define _IFT_IGAElement_KnotSpanParallelMode "knotspanparmode"
 
namespace oofem {
#ifdef __OOFEG
class StructuralElementEvaluator;
void drawIGAPatchDeformedGeometry(Element *elem, StructuralElementEvaluator *se, oofegGraphicContext &gc, TimeStep *tStep, UnknownType);
#endif

class OOFEM_EXPORT FEIIGAElementGeometryWrapper : public FEICellGeometry
{
public:
    const IntArray *knotSpan;
    Element *elem;
public:
    FEIIGAElementGeometryWrapper(Element *elem, const IntArray *knotSpan=nullptr) : FEICellGeometry(), knotSpan(knotSpan), elem(elem) { }
 
    int giveNumberOfVertices() const override { return elem->giveNumberOfNodes(); }
    const FloatArray giveVertexCoordinates(int i) const override { return elem->giveNode(i)->giveCoordinates(); }
    const Element_Geometry_Type giveGeometryType() const override {return elem->giveGeometryType();}
};
 

class OOFEM_EXPORT IGAIntegrationElement : public GaussIntegrationRule
{
protected:
    IntArray knotSpan;     // knot_span(nsd)
public:
    IGAIntegrationElement(int _n, Element *e, IntArray knotSpan) :
        GaussIntegrationRule(_n, e, 0, 0, false),
        knotSpan(std::move(knotSpan)) { }
    const IntArray *giveKnotSpan() override { return & this->knotSpan; }
    void setKnotSpan1(const IntArray &src) { this->knotSpan = src; }
};
 

class OOFEM_EXPORT IGAElement : public Element
{
protected:
#ifdef __MPI_PARALLEL_MODE
    static ParamKey IPK_IGAElement_knotSpanParallelMode;
    IntArray knotSpanParallelMode;
#endif
public:
    IGAElement(int n, Domain * aDomain) : Element(n, aDomain) { numberOfGaussPoints=1;}
    void initializeFrom(InputRecord &ir, int priority) override;
    void initializeFinish() override;
 
#ifdef __MPI_PARALLEL_MODE
    elementParallelMode giveKnotSpanParallelMode(int) const override;
#endif
 
#ifdef __OOFEG
    void drawRawGeometry(oofegGraphicContext &gc, TimeStep *tStep) override;
#endif
 
protected:
    virtual int giveNsd(const Element_Geometry_Type) = 0; // this info is available also from interpolation. Do we need it here ???
};
 

class OOFEM_EXPORT IGATSplineElement : public IGAElement
{
public:
    IGATSplineElement(int n, Domain * aDomain) : IGAElement(n, aDomain) { }
    void initializeFrom(InputRecord &ir, int priority) override;
    void initializeFinish() override;
};
} // end namespace oofem
#endif //iga_h