Nash2004ContractionModel.hpp

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*/

#ifndef NASH2004CONTRACTIONMODEL_HPP_
#define NASH2004CONTRACTIONMODEL_HPP_

#include "AbstractOdeBasedContractionModel.hpp"
#include "OdeSystemInformation.hpp"
#include "Exception.hpp"

class Nash2004ContractionModel : public AbstractOdeBasedContractionModel
{
    static const double kTa;

    static const double e0ByT0;

    double mScaledVoltage;

public:
    Nash2004ContractionModel() : AbstractOdeBasedContractionModel(1)
    {
        this->mpSystemInfo = OdeSystemInformation<Nash2004ContractionModel>::Instance();

        mScaledVoltage = 0.0;
        this->mStateVariables.push_back(0.0);
    }

    void EvaluateYDerivatives(double time, const std::vector<double>& rY, std::vector<double>& rDY)
    {
        double epsilon = (mScaledVoltage < 0.05 ? e0ByT0 : 10*e0ByT0);
        rDY[0] = epsilon * (kTa*mScaledVoltage - rY[0]);
    }

    void SetInputParameters(ContractionModelInputParameters& rInputParameters)
    {
        assert(rInputParameters.voltage != DOUBLE_UNSET);
        mScaledVoltage = (rInputParameters.voltage+85)/125;
    }

    void SetStretchAndStretchRate(double stretch, double stretchRate)
    {
    }

    double GetActiveTension()
    {
        return rGetStateVariables()[0];
    }

    double GetNextActiveTension()
    {
        return mTemporaryStateVariables[0];
    }


    bool IsStretchDependent()
    {
        return false;
    }

    bool IsStretchRateDependent()
    {
        return false;
    }
};

#endif /*NASH2004CONTRACTIONMODEL_HPP_*/