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// Gmsh - Copyright (C) 1997-2020 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
//
// Contributor(s):
// Boris Sedji
//
#ifndef FUNCGRADDISC_H
#define FUNCGRADDISC_H
#include "gmshLevelset.h"
#include "MVertex.h"
#include "GModel.h"
template <class scalar> class simpleFunction;
class FuncGradDisc : public simpleFunctionOnElement<double> {
private:
gLevelset *_ls;
GModel *_pModel;
public:
FuncGradDisc(gLevelset *ls, GModel *pModel)
{
_ls = ls;
_pModel = pModel;
}
double operator()(double x, double y, double z) const
{
// --- F2 --- //
MElement *e = getElement();
SPoint3 p(x, y, z);
if(e->getParent()) e = e->getParent();
double xyz[3] = {x, y, z};
double uvw[3];
e->xyz2uvw(xyz, uvw);
double val[30];
e->getShapeFunctions(uvw[0], uvw[1], uvw[2], val);
double f = 0;
for(std::size_t i = 0; i < e->getNumShapeFunctions(); i++) {
MVertex *v = e->getShapeFunctionNode(i);
// std::cout<<"val[i] :" << val[i] << "\n";
// std::cout<<"ls(i) :" << (*_ls)(v->x(),v->y(),v->z()) << "\n";
f = f + std::abs((*_ls)(v->x(), v->y(), v->z())) * val[i];
}
f = f - std::abs((*_ls)(x, y, z));
// std::cout<<"val f :" << f << "\n";
return f;
// --- F1 --- //
// SPoint3 p(x,y,z);
// if (e->getParent()) e = e->getParent();
// double xyz[3] = {x,y,z};
// double uvw[3];
// e->xyz2uvw(xyz,uvw);
// double val[30];
// e->getShapeFunctions(uvw[0], uvw[1], uvw[2], val);
// double f = 0;
// for (std::size_t i = 0; i < e->getNumShapeFunctions(); i++)
// {
// MVertex *v = e-<getShapeFunctionNode(i);
// f = f + (*_ls)(v->x(), v->y(), v->z()) * val[i];
// }
// f = std::abs(f);
// return f;
}
void gradient(double x, double y, double z, double &dfdx, double &dfdy,
double &dfdz) const
{
// ---- F2 ---- //
MElement *e = getElement();
SPoint3 p(x, y, z);
if(e->getParent()) e = e->getParent();
double xyz[3] = {x, y, z};
double uvw[3];
e->xyz2uvw(xyz, uvw);
double gradsuvw[256][3];
e->getGradShapeFunctions(uvw[0], uvw[1], uvw[2], gradsuvw);
double jac[3][3];
double invjac[3][3];
double dNdx;
double dNdy;
double dNdz;
const double detJ = e->getJacobian(uvw[0], uvw[1], uvw[2], jac);
inv3x3(jac, invjac);
dfdx = 0;
dfdy = 0;
dfdz = 0;
if((*_ls)(x, y, z) > 0) {
for(std::size_t i = 0; i < e->getNumShapeFunctions(); i++) {
dNdx = invjac[0][0] * gradsuvw[i][0] + invjac[0][1] * gradsuvw[i][1] +
invjac[0][2] * gradsuvw[i][2];
dNdy = invjac[1][0] * gradsuvw[i][0] + invjac[1][1] * gradsuvw[i][1] +
invjac[1][2] * gradsuvw[i][2];
dNdz = invjac[2][0] * gradsuvw[i][0] + invjac[2][1] * gradsuvw[i][1] +
invjac[2][2] * gradsuvw[i][2];
MVertex *v = e->getShapeFunctionNode(i);
dfdx = dfdx + std::abs((*_ls)(v->x(), v->y(), v->z())) * dNdx;
dfdx = dfdx - (*_ls)(v->x(), v->y(), v->z()) * dNdx;
dfdy = dfdy + std::abs((*_ls)(v->x(), v->y(), v->z())) * dNdy;
dfdy = dfdy - (*_ls)(v->x(), v->y(), v->z()) * dNdy;
dfdz = dfdz + std::abs((*_ls)(v->x(), v->y(), v->z())) * dNdz;
dfdz = dfdz - (*_ls)(v->x(), v->y(), v->z()) * dNdz;
}
}
else {
for(std::size_t i = 0; i < e->getNumShapeFunctions(); i++) {
dNdx = invjac[0][0] * gradsuvw[i][0] + invjac[0][1] * gradsuvw[i][1] +
invjac[0][2] * gradsuvw[i][2];
dNdy = invjac[1][0] * gradsuvw[i][0] + invjac[1][1] * gradsuvw[i][1] +
invjac[1][2] * gradsuvw[i][2];
dNdz = invjac[2][0] * gradsuvw[i][0] + invjac[2][1] * gradsuvw[i][1] +
invjac[2][2] * gradsuvw[i][2];
MVertex *v = e->getShapeFunctionNode(i);
dfdx = dfdx + std::abs((*_ls)(v->x(), v->y(), v->z())) * dNdx;
dfdx = dfdx + (*_ls)(v->x(), v->y(), v->z()) * dNdx;
dfdy = dfdy + std::abs((*_ls)(v->x(), v->y(), v->z())) * dNdy;
dfdy = dfdy + (*_ls)(v->x(), v->y(), v->z()) * dNdy;
dfdz = dfdz + std::abs((*_ls)(v->x(), v->y(), v->z())) * dNdz;
dfdz = dfdz + (*_ls)(v->x(), v->y(), v->z()) * dNdz;
}
}
}
// ---- F1 ------ //
//
// SPoint3 p(x,y,z);
// if (e->getParent()) e = e->getParent();
// double xyz[3] = {x,y,z};
// double uvw[3];
// e->xyz2uvw(xyz,uvw);
// double gradsuvw[256][3];
// e->getGradShapeFunctions(uvw[0],uvw[1],uvw[2],gradsuvw);
//
// double jac[3][3];
// double invjac[3][3];
// double dNdx;
// double dNdy;
// double dNdz;
// const double detJ = e->getJacobian(uvw[0], uvw[1], uvw[2], jac);
// inv3x3(jac, invjac);
//
// dfdx = 0;
// dfdy = 0;
// dfdz = 0;
//
// if ((*_ls)(x,y,z)>0)
// {
// for (std::size_t i = 0; i < e->getNumShapeFunctions(); i++)
// {
// dNdx = invjac[0][0] * gradsuvw[i][0] + invjac[0][1] *
// gradsuvw[i][1] + invjac[0][2] * gradsuvw[i][2]; dNdy =
// invjac[1][0] * gradsuvw[i][0] + invjac[1][1] * gradsuvw[i][1] +
// invjac[1][2] * gradsuvw[i][2]; dNdz = invjac[2][0] *
// gradsuvw[i][0] + invjac[2][1] * gradsuvw[i][1] + invjac[2][2] *
// gradsuvw[i][2];
//
// MVertex *v = e->getShapeFunctionNode(i);
// dfdx = dfdx + (*_ls)(v->x(), v->y(), v->z()) * dNdx;
// dfdy = dfdy + (*_ls)(v->x(), v->y(), v->z()) * dNdy;
// dfdz = dfdz + (*_ls)(v->x(), v->y(), v->z()) * dNdz;
// }
// }else
// {
// for (std::size_t i = 0; i < e->getNumShapeFunctions(); i++)
// {
// dNdx = invjac[0][0] * gradsuvw[i][0] + invjac[0][1] *
// gradsuvw[i][1] + invjac[0][2] * gradsuvw[i][2]; dNdy =
// invjac[1][0] * gradsuvw[i][0] + invjac[1][1] * gradsuvw[i][1] +
// invjac[1][2] * gradsuvw[i][2]; dNdz = invjac[2][0] *
// gradsuvw[i][0] + invjac[2][1] * gradsuvw[i][1] + invjac[2][2] *
// gradsuvw[i][2];
//
// MVertex *v = e->getShapeFunctionNode(i);
// dfdx = dfdx - (*_ls)(v->x(), v->y(), v->z()) * dNdx;
// dfdy = dfdy - (*_ls)(v->x(), v->y(), v->z()) * dNdy;
// dfdz = dfdz - (*_ls)(v->x(), v->y(), v->z()) * dNdz;
// }
// }
// }
};
#endif
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