MSCFModel_Wiedemann.h

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/****************************************************************************/
// Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.dev/sumo
// Copyright (C) 2001-2026 German Aerospace Center (DLR) and others.
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0/
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License 2.0 are satisfied: GNU General Public License, version 2
// or later which is available at
// https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
/****************************************************************************/
// The psycho-physical model of Wiedemann
/****************************************************************************/
#pragma once
#include <config.h>
 
#include "MSCFModel.h"
#include <microsim/MSLane.h>
#include <microsim/MSVehicle.h>
#include <microsim/MSVehicleType.h>
#include <utils/xml/SUMOXMLDefinitions.h>
 
 
// ===========================================================================
// class definitions
// ===========================================================================
// XXX: which Wiedemann is this? There are several versions... Below it is stated that it is modified it with Krauss vsafe... (Leo)
class MSCFModel_Wiedemann : public MSCFModel {
public:
 
    MSCFModel_Wiedemann(const MSVehicleType* vtype);
 
 
    ~MSCFModel_Wiedemann();
 
 
 
    double finalizeSpeed(MSVehicle* const veh, double vPos) const;
 
 
    double followSpeed(const MSVehicle* const veh, double speed, double gap2pred,
                       double predSpeed, double predMaxDecel, const MSVehicle* const pred = 0, const CalcReason usage = CalcReason::CURRENT) const;
 
 
    double stopSpeed(const MSVehicle* const veh, const double speed, double gap, double decel, const CalcReason usage = CalcReason::CURRENT) const;
 
 
    double interactionGap(const MSVehicle* const, double vL) const;
 
    double getSecureGap(const MSVehicle* const veh, const MSVehicle* const pred, const double speed, const double leaderSpeed, const double leaderMaxDecel) const;
 
    int getModelID() const {
        return SUMO_TAG_CF_WIEDEMANN;
    }
 
 
    MSCFModel* duplicate(const MSVehicleType* vtype) const;
 
 
    VehicleVariables* createVehicleVariables() const {
        return new VehicleVariables();
    }
 
 
private:
    class VehicleVariables : public MSCFModel::VehicleVariables {
    public:
        VehicleVariables() : accelSign(1) {}
        double accelSign;
 
        void saveState(OutputDevice& out, const MSCFModel& cfm) const;
 
        void loadState(const SUMOSAXAttributes& attrs);
    };
 
 
private:
    /* @brief the main enty point for the speed computation
     * @param[in] gap The netto gap (front bumper of ego to back bumper of leader)
     */
    double _v(const MSVehicle* veh, double predSpeed, double gap, double predAccel) const;
 
    double fullspeed(double v, double vpref, double dx, double bx) const; // also 'WUNSCH'
    double following(double sign) const; // also 'FOLGEN'
    double approaching(double dv, double dx, double abx, double predAccel) const;  // also 'BREMSBX'
    double emergency(double dv, double dx, double predAccel, double v, double gap, double abx, double bx) const; // also 'BREMSAX'
 
private:
 
    const double mySecurity;
 
    const double myEstimation;
 
    const double myAX;
 
    const double myCX;
 
    const double myMinAccel;
 
    const double myMaxApproachingDecel;
 
    static const double D_MAX;
 
private:
    MSCFModel_Wiedemann& operator=(const MSCFModel_Wiedemann& s);
};