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ParticlesRepulsionForceField.h
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ParticlesRepulsionForceField.h
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/******************************************************************************
* SOFA, Simulation Open-Framework Architecture *
* (c) 2006 INRIA, USTL, UJF, CNRS, MGH *
* *
* This program 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 program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#ifndef SOFA_COMPONENT_FORCEFIELD_PARTICLESREPULSIONFORCEFIELD_H
#define SOFA_COMPONENT_FORCEFIELD_PARTICLESREPULSIONFORCEFIELD_H
#include <SofaSphFluid/config.h>
#include <sofa/core/behavior/ForceField.h>
#include <sofa/core/behavior/MechanicalState.h>
#include <SofaSphFluid/SpatialGridContainer.h>
#include <sofa/helper/rmath.h>
#include <vector>
#include <cmath>
namespace sofa::component::forcefield
{
template<class DataTypes>
class ParticlesRepulsionForceField : public sofa::core::behavior::ForceField<DataTypes>
{
public:
SOFA_CLASS(SOFA_TEMPLATE(ParticlesRepulsionForceField, DataTypes), SOFA_TEMPLATE(core::behavior::ForceField, DataTypes));
typedef sofa::core::behavior::ForceField<DataTypes> Inherit;
typedef typename DataTypes::VecCoord VecCoord;
typedef typename DataTypes::VecDeriv VecDeriv;
typedef typename DataTypes::Coord Coord;
typedef typename DataTypes::Deriv Deriv;
typedef typename Coord::value_type Real;
typedef core::objectmodel::Data<VecDeriv> DataVecDeriv;
typedef core::objectmodel::Data<VecCoord> DataVecCoord;
public:
Data< Real > distance; ///< Distance to maintain between particles
Data< Real > stiffness; ///< Stiffness
Data< Real > damping; ///< Damping
typedef sofa::component::container::SpatialGridContainer<DataTypes> Grid;
Grid* grid;
protected:
struct Particle
{
sofa::type::vector< int > neighbors; ///< indice + r/h
};
sofa::type::vector<Particle> particles;
public:
/// this method is called by the SpatialGrid when w connection between two particles is detected
void addNeighbor(int i1, int i2, Real /*r2*/, Real /*h2*/)
{
//Real r_h = (Real)sqrt(r2/h2);
if (i1<i2)
particles[i1].neighbors.push_back(i2);
else
particles[i2].neighbors.push_back(i1);
}
protected:
ParticlesRepulsionForceField();
public:
void init() override;
void addForce(const core::MechanicalParams* mparams, DataVecDeriv& d_f, const DataVecCoord& d_x, const DataVecDeriv& d_v) override;
void addDForce(const core::MechanicalParams* mparams, DataVecDeriv& d_df, const DataVecDeriv& d_dx) override;
void addKToMatrix(const sofa::core::MechanicalParams* mparams, const sofa::core::behavior::MultiMatrixAccessor* matrix) override;
SReal getPotentialEnergy(const sofa::core::MechanicalParams* /*mparams*/, const DataVecCoord& /* x */) const override
{
msg_error() << "getPotentialEnergy not implemented";
return 0.0;
}
void draw(const core::visual::VisualParams* vparams) override;
};
using sofa::defaulttype::Vec3dTypes;
using sofa::defaulttype::Vec2dTypes;
#if !defined(SOFA_COMPONENT_FORCEFIELD_PARTICLESREPULSIONFORCEFIELD_CPP)
extern template class SOFA_SPH_FLUID_API ParticlesRepulsionForceField<sofa::defaulttype::Vec3Types>;
extern template class SOFA_SPH_FLUID_API ParticlesRepulsionForceField<sofa::defaulttype::Vec2Types>;
#endif // !defined(SOFA_COMPONENT_FORCEFIELD_PARTICLESREPULSIONFORCEFIELD_CPP)
} // namespace sofa::component::forcefield
#endif // SOFA_COMPONENT_FORCEFIELD_PARTICLESREPULSIONFORCEFIELD_H