Sensors.h

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// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef _SENSORS_H
#define _SENSORS_H
/*
 * Ship/station subsystem that holds a list of known contacts
 * and handles IFF
 * Some ideas:
 *  - targeting should be lost when going out of range
 *  - don't run radar sweep every frame (more of an optimization than simulation)
 *  - allow "pinned" radar contacts (visible at all ranges, for missions)
 */
#include "Body.h"
#include "libs.h"
 
class Body;
class HudTrail;
class Ship;
 
class Sensors {
public:
    enum IFF {
        IFF_UNKNOWN, //also applies to inert objects
        IFF_NEUTRAL,
        IFF_ALLY,
        IFF_HOSTILE
    };
 
    enum TargetingCriteria {
        TARGET_NEAREST_HOSTILE
    };
 
    struct RadarContact {
        RadarContact();
        RadarContact(Body *);
        ~RadarContact();
        Body *body;
        HudTrail *trail;
        double distance;
        IFF iff;
        bool fresh;
    };
 
    typedef std::list<RadarContact> ContactList;
 
    static Color IFFColor(IFF);
    static bool ContactDistanceSort(const RadarContact &a, const RadarContact &b);
 
    Sensors(Ship *owner);
    bool ChooseTarget(TargetingCriteria);
    IFF CheckIFF(Body *other);
    const ContactList &GetContacts() { return m_radarContacts; }
    const ContactList &GetStaticContacts() { return m_staticContacts; }
    void Update(float time);
    void UpdateIFF(Body *);
    void ResetTrails();
 
private:
    Ship *m_owner;
    ContactList m_radarContacts;
    ContactList m_staticContacts; //things we know of regardless of range
 
    void PopulateStaticContacts();
};
 
#endif