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/////////////////////////////////////////////////////////////
// //
// Copyright (c) 2003-2014 by The University of Queensland //
// Centre for Geoscience Computing //
// http://earth.uq.edu.au/centre-geoscience-computing //
// //
// Primary Business: Brisbane, Queensland, Australia //
// Licensed under the Open Software License version 3.0 //
// http://www.apache.org/licenses/LICENSE-2.0 //
// //
/////////////////////////////////////////////////////////////
#ifndef ESYS_LSMMACROFRICTIONCALCULATOR_H
#define ESYS_LSMMACROFRICTIONCALCULATOR_H
#include "Foundation/vec3.h"
#include <vector>
namespace esys
{
namespace lsm
{
class MacroFrictionCalculator
{
public:
typedef std::pair<Vec3,Vec3> WallForcePair;
typedef std::vector<double> FrictionVector;
MacroFrictionCalculator(int normalDimIndex, int shearDimIndex)
: m_normalDimIndex(normalDimIndex),
m_shearDimIndex(shearDimIndex),
m_frictionVector()
{
}
double getFriction(const WallForcePair &forcePair) const
{
const double normalStress = (forcePair.first[m_normalDimIndex] - forcePair.second[m_normalDimIndex]);
if (normalStress != 0.0) {
const double shearStress = forcePair.first[m_shearDimIndex] - forcePair.second[m_shearDimIndex];
return shearStress/normalStress;
}
return 0.0;
}
void add(const WallForcePair &forcePair)
{
m_frictionVector.push_back(getFriction(forcePair));
}
template<typename TmplIterator>
void add(TmplIterator it)
{
while (it.hasNext())
{
add(it.next());
}
}
const FrictionVector &getFrictionVector() const
{
return m_frictionVector;
}
private:
int m_normalDimIndex;
int m_shearDimIndex;
FrictionVector m_frictionVector;
};
}
}
#endif
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