Ship.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 _SHIP_H
#define _SHIP_H
 
#include <unordered_map>
 
#include "DynamicBody.h"
#include "ShipType.h"
#include "galaxy/SystemPath.h"
#include "lua/LuaRef.h"
#include "scenegraph/ModelSkin.h"
#include "sound/Sound.h"
 
#include "FixedGuns.h"
#include "ship/Propulsion.h"
 
class AICommand;
class Camera;
class CargoBody;
class SpaceStation;
class HyperspaceCloud;
class Missile;
class NavLights;
class Planet;
class Sensors;
class ShipController;
class Space;
 
struct CollisionContact;
struct HeatGradientParameters_t;
 
namespace Graphics {
    class Renderer;
}
 
struct shipstats_t {
    int used_capacity;
    int used_cargo;
    int free_capacity;
    int static_mass;      // cargo, equipment + hull
    float hull_mass_left; // effectively hitpoints
    float hyperspace_range;
    float hyperspace_range_max;
    float shield_mass;
    float shield_mass_left;
    float fuel_tank_mass_left;
 
    // cached equipment information to avoid costly Lua lookups
    int atmo_shield_cap;
    int radar_cap;
    int fuel_scoop_cap;
    int cargo_bay_life_support_cap;
    int hull_autorepair_cap;
};
 
struct HyperdriveSoundsTable {
    std::string jump_sound;
    std::string warmup_sound;
    std::string abort_sound;
};
 
class Ship : public DynamicBody {
    friend class ShipController; //only controllers need access to AITimeStep
    friend class PlayerShipController;
 
public:
    OBJDEF(Ship, DynamicBody, SHIP);
    Ship() = delete;
    Ship(const Json &jsonObj, Space *space);
    Ship(const ShipType::Id &shipId);
    virtual ~Ship();
 
    virtual void SetFrame(FrameId fId) override;
 
    void SetController(ShipController *c); //deletes existing
    ShipController *GetController() const { return m_controller; }
 
    virtual void SetDockedWith(SpaceStation *, int port);
    SpaceStation *GetDockedWith() const { return m_dockedWith; }
    int GetDockingPort() const { return m_dockedWithPort; }
    bool IsDocked() const { return GetFlightState() == Ship::DOCKED; }
    bool IsLanded() const { return GetFlightState() == Ship::LANDED; }
 
    virtual void SetLandedOn(Planet *p, float latitude, float longitude);
 
    virtual void Render(Graphics::Renderer *r, const Camera *camera, const vector3d &viewCoords, const matrix4x4d &viewTransform) override;
 
    inline void ClearThrusterState()
    {
        ClearAngThrusterState();
        if (m_launchLockTimeout <= 0.0f) ClearLinThrusterState();
    }
    void UpdateLuaStats();
    void UpdateEquipStats();
    void UpdateFuelStats();
    void UpdateGunsStats();
    const shipstats_t &GetStats() const { return m_stats; }
 
    void Explode();
    virtual bool DoDamage(float kgDamage); // can be overloaded in Player to add audio
    void SetGunState(int idx, int state);
    float GetGunTemperature(int idx) const { return GetFixedGuns()->GetGunTemperature(idx); }
    void UpdateMass();
    virtual bool SetWheelState(bool down); // returns success of state change, NOT state itself
    void Blastoff();
    bool Undock();
    virtual void TimeStepUpdate(const float timeStep) override;
    virtual void StaticUpdate(const float timeStep) override;
 
    void TimeAccelAdjust(const float timeStep);
 
    bool IsDecelerating() const { return m_decelerating; }
 
    virtual void NotifyRemoved(const Body *const removedBody) override;
    virtual bool OnCollision(Body *o, Uint32 flags, double relVel) override;
    virtual bool OnDamage(Body *attacker, float kgDamage, const CollisionContact &contactData) override;
 
    enum FlightState { // <enum scope='Ship' name=ShipFlightState public>
        FLYING,        // open flight (includes autopilot)
        DOCKING,       // in docking animation
        UNDOCKING,     // in docking animation
        DOCKED,        // docked with station
        LANDED,        // rough landed (not docked)
        JUMPING,       // between space and hyperspace ;)
        HYPERSPACE,    // in hyperspace
    };
 
    // vector3d CalcAtmoPassiveControl() const;
    vector3d CalcAtmoTorque() const;
 
    FlightState GetFlightState() const { return m_flightState; }
    void SetFlightState(FlightState s);
    float GetWheelState() const { return m_wheelState; }
    int GetWheelTransition() const { return m_wheelTransition; }
    bool SpawnCargo(CargoBody *c_body) const;
 
    LuaRef GetEquipSet() const { return m_equipSet; }
 
    virtual bool IsInSpace() const override { return (m_flightState != HYPERSPACE); }
 
    void SetHyperspaceDest(const SystemPath &dest) { m_hyperspace.dest = dest; }
    const SystemPath &GetHyperspaceDest() const { return m_hyperspace.dest; }
    double GetHyperspaceDuration() const { return m_hyperspace.duration; }
    double GetECMRechargeRemain() const { return m_ecmRecharge; }
 
    enum HyperjumpStatus { // <enum scope='Ship' name=ShipJumpStatus prefix=HYPERJUMP_ public>
        HYPERJUMP_OK,
        HYPERJUMP_CURRENT_SYSTEM,
        HYPERJUMP_NO_DRIVE,
        HYPERJUMP_INITIATED,
        HYPERJUMP_DRIVE_ACTIVE,
        HYPERJUMP_OUT_OF_RANGE,
        HYPERJUMP_INSUFFICIENT_FUEL,
        HYPERJUMP_SAFETY_LOCKOUT
    };
 
    Ship::HyperjumpStatus CheckHyperjumpCapability() const;
    virtual Ship::HyperjumpStatus InitiateHyperjumpTo(const SystemPath &dest, int warmup_time, double duration, const HyperdriveSoundsTable &sounds, LuaRef checks);
    virtual void AbortHyperjump();
    float GetHyperspaceCountdown() const { return m_hyperspace.countdown; }
    bool IsHyperspaceActive() const { return (m_hyperspace.countdown > 0.0); }
 
    // 0 to 1.0 is alive, > 1.0 = death
    double GetHullTemperature() const;
 
    enum ECMResult {
        ECM_NOT_INSTALLED,
        ECM_ACTIVATED,
        ECM_RECHARGING,
    };
 
    ECMResult UseECM();
 
    virtual Missile *SpawnMissile(ShipType::Id missile_type, int power = -1);
 
    enum AlertState { // <enum scope='Ship' name=ShipAlertStatus prefix=ALERT_ public>
        ALERT_NONE,
        ALERT_SHIP_NEARBY,
        ALERT_SHIP_FIRING,
        ALERT_MISSILE_DETECTED,
    };
    AlertState GetAlertState() { return m_alertState; }
 
    void AIClearInstructions(); // Note: defined in Ship-AI.cpp
    bool AIIsActive() { return m_curAICmd ? true : false; }
    void AIGetStatusText(char *str); // Note: defined in Ship-AI.cpp
 
    void AIKamikaze(Body *target); // Note: defined in Ship-AI.cpp
    void AIKill(Ship *target);     // Note: defined in Ship-AI.cpp
    //void AIJourney(SystemBodyPath &dest);
    void AIDock(SpaceStation *target);      // Note: defined in Ship-AI.cpp
    void AIFlyTo(Body *target);             // Note: defined in Ship-AI.cpp
    void AIOrbit(Body *target, double alt); // Note: defined in Ship-AI.cpp
    void AIHoldPosition();                  // Note: defined in Ship-AI.cpp
 
    void AIBodyDeleted(const Body *const body){}; // Note: defined in Ship-AI.cpp // todo: signals
 
    const AICommand *GetAICommand() const { return m_curAICmd; }
 
    virtual void PostLoadFixup(Space *space) override;
 
    const ShipType *GetShipType() const { return m_type; }
    virtual void SetShipType(const ShipType::Id &shipId);
 
    const SceneGraph::ModelSkin &GetSkin() const { return m_skin; }
    void SetSkin(const SceneGraph::ModelSkin &skin);
 
    void SetPattern(unsigned int num);
 
    void SetLabel(const std::string &label) override;
    void SetShipName(const std::string &shipName);
 
    float GetAtmosphericPressureLimit() const;
    float GetPercentShields() const;
    float GetPercentHull() const;
    void SetPercentHull(float);
 
    void EnterSystem();
 
    HyperspaceCloud *GetHyperspaceCloud() const { return m_hyperspaceCloud; }
 
    sigc::signal<void> onDock; // JJ: check what these are for
    sigc::signal<void> onUndock;
    sigc::signal<void> onLanded;
 
    // mutable because asking to know when state changes is not the same as
    // actually changing state
    mutable sigc::signal<void> onFlavourChanged;
 
    bool IsInvulnerable() const { return m_invulnerable; }
    void SetInvulnerable(bool b) { m_invulnerable = b; }
 
    Sensors *GetSensors() const { return m_sensors.get(); }
 
    Uint8 GetRelations(Body *other) const; //0=hostile, 50=neutral, 100=ally
    void SetRelations(Body *other, Uint8 percent);
 
    double GetLandingPosOffset() const { return m_landingMinOffset; }
 
protected:
    vector3d CalcAtmosphericForce() const override;
 
    virtual void SaveToJson(Json &jsonObj, Space *space) override;
 
    bool AITimeStep(float timeStep); // Called by controller. Returns true if complete
 
    virtual void SetAlertState(AlertState as);
 
    virtual void OnEnterHyperspace();
    virtual void OnEnterSystem();
 
    SpaceStation *m_dockedWith;
    int m_dockedWithPort;
 
    float m_ecmRecharge;
 
    ShipController *m_controller;
 
    struct HyperspacingOut {
        SystemPath dest;
        // > 0 means active
        float countdown;
        bool now;
        double duration;
        LuaRef checks; // A Lua function to check all the conditions before the jump
        HyperdriveSoundsTable sounds;
    } m_hyperspace;
 
    LuaRef m_equipSet;
 
private:
    float GetECMRechargeTime();
    void DoThrusterSounds() const;
    void Init();
    void TestLanded();
    void UpdateAlertState();
    void UpdateFuel(float timeStep);
    void SetShipId(const ShipType::Id &shipId);
    void EnterHyperspace();
    void InitMaterials();
    void InitEquipSet();
 
    bool m_invulnerable;
 
    static const double DEFAULT_LIFT_TO_DRAG_RATIO;
 
    static const float DEFAULT_SHIELD_COOLDOWN_TIME;
    float m_shieldCooldown;
    shipstats_t m_stats;
    const ShipType *m_type;
    SceneGraph::ModelSkin m_skin;
 
    Sound::Event m_beamLaser[2];
 
    FlightState m_flightState;
    bool m_testLanded;
    bool m_forceWheelUpdate;
    float m_launchLockTimeout;
    float m_wheelState;
    int m_wheelTransition;
 
    AlertState m_alertState;
    double m_lastAlertUpdate;
    double m_lastFiringAlert;
    bool m_shipNear;
    bool m_shipFiring;
    bool m_missileDetected;
 
    HyperspaceCloud *m_hyperspaceCloud;
 
    AICommand *m_curAICmd;
 
    double m_landingMinOffset; // offset from the centre of the ship used during docking
 
    int m_dockedWithIndex; // deserialisation
 
    SceneGraph::Animation *m_landingGearAnimation;
    std::unique_ptr<NavLights> m_navLights;
 
    static HeatGradientParameters_t s_heatGradientParams;
 
    std::unique_ptr<Sensors> m_sensors;
    std::unordered_map<Body *, Uint8> m_relationsMap;
 
    std::string m_shipName;
 
public:
    void ClearAngThrusterState() { GetPropulsion()->ClearAngThrusterState(); }
    void ClearLinThrusterState() { GetPropulsion()->ClearLinThrusterState(); }
    double GetAccelFwd() { return GetPropulsion()->GetAccelFwd(); }
    void SetAngThrusterState(const vector3d &levels) { GetPropulsion()->SetAngThrusterState(levels); }
    double GetFuel() const { return GetPropulsion()->GetFuel(); }
    double GetAccel(Thruster thruster) const { return GetPropulsion()->GetAccel(thruster); }
    void SetFuel(const double f) { GetPropulsion()->SetFuel(f); }
    void SetFuelReserve(const double f) { GetPropulsion()->SetFuelReserve(f); }
 
    bool AIMatchVel(const vector3d &vel) { return GetPropulsion()->AIMatchVel(vel); }
    double AIFaceDirection(const vector3d &dir, double av = 0) { return GetPropulsion()->AIFaceDirection(dir, av); }
    void AIMatchAngVelObjSpace(const vector3d &angvel) { return GetPropulsion()->AIMatchAngVelObjSpace(angvel); }
    void SetThrusterState(int axis, double level) { return GetPropulsion()->SetLinThrusterState(axis, level); }
    void AIModelCoordsMatchAngVel(const vector3d &desiredAngVel, double softness) { return GetPropulsion()->AIModelCoordsMatchAngVel(desiredAngVel, softness); }
};
 
#endif /* _SHIP_H */