/usr/include/gmsh/laplaceTerm.h is in libgmsh-dev 2.10.1+dfsg1-1ubuntu4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | // Gmsh - Copyright (C) 1997-2015 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// bugs and problems to the public mailing list <gmsh@geuz.org>.
#ifndef _LAPLACE_TERM_H_
#define _LAPLACE_TERM_H_
#include "helmholtzTerm.h"
// \nabla \cdot k \nabla U
class laplaceTerm : public helmholtzTerm<double> {
protected:
const int _iField;
std::map<MVertex*, SPoint3> *_coordView;
public:
laplaceTerm(GModel *gm, int iField, simpleFunction<double> *k,
std::map<MVertex*, SPoint3> *coord=NULL)
: helmholtzTerm<double>(gm, iField, iField, k, 0), _iField(iField), _coordView(coord) {}
void elementVector(SElement *se, fullVector<double> &m) const
{
MElement *e = se->getMeshElement();
int nbSF = e->getNumShapeFunctions();
fullMatrix<double> *mat;
mat = new fullMatrix<double>(nbSF, nbSF);
elementMatrix(se, *mat);
fullVector<double> val(nbSF);
val.scale(0.);
for (int i = 0; i < nbSF; i++){
std::map<MVertex*, SPoint3>::iterator it = _coordView->find(e->getShapeFunctionNode(i));
SPoint3 UV = it->second;
if (_iField == 1) val(i) = UV.x();
else if (_iField == 2) val(i) = UV.y();
}
m.scale(0.);
for (int i = 0; i < nbSF; i++)
for (int j = 0; j < nbSF; j++)
m(i) += -(*mat)(i, j) * val(j);
}
};
// a \nabla U
class massTerm : public helmholtzTerm<double> {
public:
massTerm(GModel *gm, int iField, simpleFunction<double> *a)
: helmholtzTerm<double>(gm, iField, iField, 0, a) {}
};
#endif
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