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/******************************************************************************
* SOFA, Simulation Open-Framework Architecture, version 1.0 beta 4 *
* (c) 2006-2009 MGH, INRIA, USTL, UJF, CNRS *
* *
* 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 library 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. *
*******************************************************************************
* SOFA :: Modules *
* *
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#ifndef SOFA_COMPONENT_FORCEFIELD_TRIANGLEPRESSUREFORCEFIELD_H
#define SOFA_COMPONENT_FORCEFIELD_TRIANGLEPRESSUREFORCEFIELD_H
#include <sofa/core/componentmodel/behavior/ForceField.h>
#include <sofa/component/topology/TriangleSubsetData.h>
namespace sofa
{
namespace component
{
namespace forcefield
{
using namespace sofa::defaulttype;
using namespace sofa::component::topology;
template<class DataTypes>
class TrianglePressureForceField : public core::componentmodel::behavior::ForceField<DataTypes>, public virtual core::objectmodel::BaseObject
{
public:
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 ;
protected:
class TrianglePressureInformation
{
public:
Real area;
Deriv force;
TrianglePressureInformation() {}
TrianglePressureInformation(const TrianglePressureInformation &e)
: area(e.area),force(e.force)
{ }
};
TriangleSubsetData<TrianglePressureInformation> trianglePressureMap;
sofa::core::componentmodel::topology::BaseMeshTopology* _topology;
Data<Deriv> pressure;
Data<std::string> triangleList;
/// the normal used to define the edge subjected to the pressure force.
Data<Deriv> normal;
Data<Real> dmin; // coordinates min of the plane for the vertex selection
Data<Real> dmax;// coordinates max of the plane for the vertex selection
public:
TrianglePressureForceField():
pressure(initData(&pressure, "pressure", "Pressure force per unit area"))
, triangleList(initData(&triangleList,std::string(),"triangleList", "Indices of triangles separated with commas where a pressure is applied"))
, normal(initData(&normal,"normal", "Normal direction for the plane selection of triangles"))
, dmin(initData(&dmin,(Real)0.0, "dmin", "Minimum distance from the origin along the normal direction"))
, dmax(initData(&dmax,(Real)0.0, "dmax", "Maximum distance from the origin along the normal direction"))
{
}
virtual ~TrianglePressureForceField();
virtual void init();
virtual void addForce (VecDeriv& f, const VecCoord& x, const VecDeriv& v);
virtual void addDForce (VecDeriv& /*df*/, const VecDeriv& /*dx*/) {}
virtual double getPotentialEnergy(const VecCoord& x);
// Handle topological changes
virtual void handleTopologyChange();
void draw();
void setDminAndDmax(const double _dmin, const double _dmax) {
dmin.setValue((Real)_dmin);dmax.setValue((Real)_dmax);}
void setNormal(const Coord n) { normal.setValue(n);}
void setPressure(Deriv _pressure) { this->pressure = _pressure; updateTriangleInformation(); }
protected :
void selectTrianglesAlongPlane();
void selectTrianglesFromString();
void updateTriangleInformation();
void initTriangleInformation();
bool isPointInPlane(Coord p) {
Real d=dot(p,normal.getValue());
if ((d>dmin.getValue())&& (d<dmax.getValue()))
return true;
else
return false;
}
};
} // namespace forcefield
} // namespace component
} // namespace sofa
#endif /* _TRIANGLEPRESSUREFORCEFIELD_H_ */
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