MSCFModel_IDM.h

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/****************************************************************************/
// The Intelligent Driver Model (IDM) car-following model
/****************************************************************************/
// SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
// Copyright (C) 2001-2011 DLR (http://www.dlr.de/) and contributors
/****************************************************************************/
//
//   This program is free software; you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation; either version 2 of the License, or
//   (at your option) any later version.
//
/****************************************************************************/
#ifndef MSCFMODEL_IDM_H
#define MSCFMODEL_IDM_H

// ===========================================================================
// included modules
// ===========================================================================
#ifdef _MSC_VER
#include <windows_config.h>
#else
#include <config.h>
#endif

#include <microsim/MSCFModel.h>
#include <microsim/MSLane.h>
#include <microsim/MSVehicle.h>
#include <microsim/MSVehicleType.h>
#include <utils/xml/SUMOXMLDefinitions.h>


// ===========================================================================
// class definitions
// ===========================================================================
class MSCFModel_IDM : public MSCFModel {
public:
    MSCFModel_IDM(const MSVehicleType* vtype, SUMOReal accel, SUMOReal decel,
                  SUMOReal headwayTime, SUMOReal delta, SUMOReal internalStepping);


    MSCFModel_IDM(const MSVehicleType* vtype, SUMOReal accel, SUMOReal decel,
                  SUMOReal headwayTime, SUMOReal adaptationFactor, SUMOReal adaptationTime,
                  SUMOReal internalStepping);


    ~MSCFModel_IDM();



    SUMOReal moveHelper(MSVehicle* const veh, SUMOReal vPos) const;


    SUMOReal followSpeed(const MSVehicle* const veh, SUMOReal speed, SUMOReal gap2pred, SUMOReal predSpeed, SUMOReal predMaxDecel) const;


    SUMOReal stopSpeed(const MSVehicle* const veh, SUMOReal gap2pred) const;


    SUMOReal interactionGap(const MSVehicle* const , SUMOReal vL) const;


    int getModelID() const {
        return myExpFactor > 0. ? SUMO_TAG_CF_IDMM : SUMO_TAG_CF_IDM;
    }



    MSCFModel* duplicate(const MSVehicleType* vtype) const;


    VehicleVariables* createVehicleVariables() const {
        if (myExpFactor > 0.) {
            return new VehicleVariables();
        }
        return 0;
    }


private:
    class VehicleVariables : public MSCFModel::VehicleVariables {
    public:
        VehicleVariables() : levelOfService(1.) {}
        SUMOReal levelOfService;
    };


private:
    SUMOReal _v(const MSVehicle* const veh, SUMOReal gap2pred, SUMOReal mySpeed, SUMOReal predSpeed, SUMOReal desSpeed) const;

    SUMOReal desiredSpeed(const MSVehicle* const veh) const {
        return MIN2(myType->getMaxSpeed(), veh->getLane()->getMaxSpeed());
    }


private:
    const SUMOReal myDelta;

    const SUMOReal myAdaptationFactor;

    const SUMOReal myAdaptationTime;

    const SUMOReal myExpFactor;

    const int myIterations;

    const SUMOReal myTwoSqrtAccelDecel;
};

#endif  /* MSCFMODEL_IDM_H */