/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Simulation Universe and Region classes
*/

#include "Sim.h"

#include <cstdint>

#include "Asteroid.h"
#include "AudioConfig.h"
#include "Bitmap.h"
#include "Bolt.h"
#include "Callsign.h"
#include "CameraDirector.h"
#include "Clock.h"
#include "Combatant.h"
#include "CombatGroup.h"
#include "CombatUnit.h"
#include "Contact.h"
#include "ContentBundle.h"
#include "Debris.h"
#include "Drive.h"
#include "Drone.h"
#include "Element.h"
#include "Explosion.h"
#include "FlightDeck.h"
#include "Game.h"
#include "GameScreen.h"
#include "Grid.h"
#include "Hangar.h"
#include "HUDView.h"
#include "Instruction.h"
#include "Light.h"
#include "Mfd.h"
#include "MissionEvent.h"
#include "Mission.h"
#include "MouseController.h"
#include "MusicDirector.h"
#include "NavLight.h"
#include "NetClientConfig.h"
#include "NetData.h"
#include "NetGame.h"
#include "NetPlayer.h"
#include "NetServerConfig.h"
#include "NetUtil.h"
#include "ParseUtil.h"
#include "Player.h"
#include "Power.h"
#include "QuantumDrive.h"
#include "RadioTraffic.h"
#include "Random.h"
#include "SeekerAI.h"
#include "Sensor.h"
#include "Shield.h"
#include "ShipAI.h"
#include "ShipDesign.h"
#include "Ship.h"
#include "Shot.h"
#include "SimEvent.h"
#include "SimObject.h"
#include "Sky.h"
#include "Solid.h"
#include "Sound.h"
#include "Sprite.h"
#include "Stardate.h"
#include "Starshatter.h"
#include "StarSystem.h"
#include "Terrain.h"
#include "TerrainPatch.h"
#include "Video.h"
#include "WeaponGroup.h"
#include "Weapon.h"

const char* FormatGameTime();

// +--------------------------------------------------------------------+

class SimHyper
{
public:
    SimHyper(Ship* o, SimRegion* r, const Point& l, int t, bool h, Ship* fc1, Ship* fc2)
    : ship(o), rgn(r), loc(l), type(t), hyperdrive(h), fc_src(fc1), fc_dst(fc2)  { }

    Ship*       ship;
    SimRegion*  rgn;
    Point       loc;
    int         type;
    bool        hyperdrive;
    Ship*       fc_src;
    Ship*       fc_dst;
};

// +--------------------------------------------------------------------+

class SimSplash
{
public:
    SimSplash(SimRegion* r, const Point& l, double d, double n)
    : rgn(r), loc(l), damage(d), range(n),
    owner_name("Collateral Damage"), missile(false) { }

    Text        owner_name;
    Point       loc;
    double      damage;
    double      range;
    SimRegion*  rgn;
    bool        missile;
};

// +--------------------------------------------------------------------+

static bool first_frame = true;
Sim*        Sim::sim    = 0;

Sim::Sim(MotionController* c)
    : ctrl(c), test_mode(false), grid_shown(false), dust(0),
      star_system(0), active_region(0), mission(0), netgame(0)
{
    Drive::Initialize();
    Explosion::Initialize();
    FlightDeck::Initialize();
    NavLight::Initialize();
    Shot::Initialize();
    MFD::Initialize();
    Asteroid::Initialize();

    if (!sim)
    sim = this;

    cam_dir = CameraDirector::GetInstance();
}

Sim::~Sim()
{
    UnloadMission();

    Shot::Close();
    FlightDeck::Close();
    NavLight::Close();
    Token::close();
    Asteroid::Close();

    if (sim == this)
    sim = 0;
}

// +--------------------------------------------------------------------+

void
Sim::CommitMission()
{
    for (int i = 0; i < regions.size(); i++)
    regions[i]->CommitMission();

    if (ShipStats::NumStats() > 0) {
        Print("\n\nFINAL SCORE '%s'\n", (const char*) mission->Name());
        Print("Name              Kill1  Kill2  Died   Colls  Points  Cmd Pts\n");
        Print("----------------  -----  -----  -----  -----  ------  ------\n");

        int tk1 = 0;
        int tk2 = 0;
        int td  = 0;
        int tc  = 0;

        for (int i = 0; i < ShipStats::NumStats(); i++) {
            ShipStats* s = ShipStats::GetStats(i);
            s->Summarize();

            Print("%-16s  %5d  %5d  %5d  %5d  %6d  %6d\n",
            s->GetName(),
            s->GetGunKills(),
            s->GetMissileKills(),
            s->GetDeaths(),
            s->GetColls(),
            s->GetPoints(),
            s->GetCommandPoints());

            tk1 += s->GetGunKills();
            tk2 += s->GetMissileKills();
            td  += s->GetDeaths();
            tc  += s->GetColls();

            CombatGroup* group = s->GetCombatGroup();

            if (group) {
                Combatant* c = group->GetCombatant();

                if (c)
                c->AddScore(s->GetPoints());

                if (s->GetElementIndex() == 1)
                group->SetSorties(group->Sorties() + 1);

                group->SetKills(group->Kills() + s->GetGunKills() + s->GetMissileKills());
                group->SetPoints(group->Points() + s->GetPoints());
            }

            if (s->IsPlayer()) {
                Player* p = Player::GetCurrentPlayer();
                s->SetFlightTime(starshatter::engine::MissionTime());
                p->ProcessStats(s);

                if (mission && mission->Type() == Mission::TRAINING &&
                        s->GetDeaths() == 0 && s->GetColls() == 0)
                p->SetTrained(mission->Identity());

                Player::Save(); // save training state right now before we forget!
            }
        }

        Print("--------------------------------------------\n");
        Print("TOTAL             %5d  %5d  %5d  %5d\n\n", tk1, tk2, td, tc);

        ShipStats::Initialize();
    }
}

// +--------------------------------------------------------------------+

void
Sim::UnloadMission()
{
    if (netgame) {
        delete netgame;
        netgame = 0;
    }

    HUDView* hud = HUDView::GetInstance();
    if (hud)
    hud->HideAll();

    ShipStats::Initialize();

    events.destroy();
    mission_elements.destroy();
    elements.destroy();
    finished.destroy();

    if (active_region)
    active_region->Deactivate();

    if (star_system)
    star_system->Deactivate();

    if (mission) {
        mission->SetActive(false);
        mission->SetComplete(true);
    }

    regions.destroy();
    scene.Collect();

    GRAPHIC_DESTROY(dust);

    star_system   = 0;
    active_region = 0;
    mission       = 0;

    // reclaim memory used by radio traffic:
    RadioTraffic::DiscardMessages();

    // release texture memory for 2D screens:
    Video* video = Video::GetInstance();
    if (video)
    video->InvalidateCache();

    cam_dir = CameraDirector::GetInstance();
    if (cam_dir)
    cam_dir->SetShip(0);

    AudioConfig::SetTraining(false);
}

bool
Sim::IsActive() const
{
    return mission && mission->IsActive();
}

bool
Sim::IsComplete() const
{
    return mission && mission->IsComplete();
}

// +--------------------------------------------------------------------+

void
Sim::LoadMission(Mission* m, bool preload_textures)
{
    cam_dir = CameraDirector::GetInstance();

    if (!mission) {
        mission = m;
        mission->SetActive(true);

        if (preload_textures) {
            Video*         video = Video::GetInstance();
            List<Model>    all_models;
            //List<Bitmap>   all_textures;

            ListIter<MissionElement> elem_iter = mission->GetElements();
            while (++elem_iter) {
                MissionElement*   elem   = elem_iter.value();
                const ShipDesign* design = elem->GetDesign();

                if (design) {
                    for (int i = 0; i < 4; i++) {
                        List<Model>& models = (List<Model>&) design->models[i]; // cast-away const

                        ListIter<Model> model_iter = models;
                        while (++model_iter) {
                            Model* model = model_iter.value();
                            if (!all_models.contains(model)) {
                                all_models.append(model);
                                //model->GetAllTextures(all_textures);

                                ListIter<Surface> surf_iter = model->GetSurfaces();
                                while (++surf_iter) {
                                    Surface* surface = surf_iter.value();
                                    video->PreloadSurface(surface);
                                }
                            }
                        }
                    }
                }
            }

            /*
        if (video && all_textures.size() > 0) {
            ::Print("Preloading %d textures into video texture cache\n", all_textures.size());
            ListIter<Bitmap> bmp_iter = all_textures;
            while (++bmp_iter) {
            Bitmap* bmp = bmp_iter.value();
            video->PreloadTexture(bmp);
            }
        }
        */
        }
    }
}

void
Sim::ExecMission()
{
    cam_dir = CameraDirector::GetInstance();

    if (!mission) {
        Print("Sim::ExecMission() - No mission to execute.\n");
        return;
    }

    if (elements.size() || finished.size()) {
        Print("Sim::ExecMission(%s) mission is already executing.\n", mission->Name());
        return;
    }

    Print("\nExec Mission: '%s'\n", (const char*) mission->Name());

    if (cam_dir)
    cam_dir->Reset();

    if (mission->Stardate() > 0.0l)
        starshatter::engine::SetOperationStart(mission->Stardate());
    starshatter::engine::SetMissionStart(mission->Start());
    Clock::GetInstance()->ResetGameTime();

    star_system = mission->GetStarSystem();
    star_system->Activate(scene);

    int dust_factor = 0;

    if (Starshatter::GetInstance())
    dust_factor = Starshatter::GetInstance()->Dust();

    if (star_system->NumDust() * dust_factor) {
        dust = new Dust(star_system->NumDust() * 2*(dust_factor+1), dust_factor > 1);
        scene.AddGraphic(dust);
    }

    CreateRegions();
    BuildLinks();
    CreateElements();
    CopyEvents();

    if (netgame) {
        delete netgame;
        netgame = 0;
    }

    first_frame = true;

    AudioConfig::SetTraining(mission->Type() == Mission::TRAINING);
}

// +--------------------------------------------------------------------+

void
Sim::CreateRegions()
{
    const char* active_region_name = 0;

    if (mission)
        active_region_name = mission->GetRegion();
    else return;

    ListIter<StarSystem> iter = mission->GetSystemList();
    while (++iter) {
        StarSystem* sys = iter.value();

        // insert objects from star system:
        ListIter<OrbitalBody> star = sys->Bodies();
        while (++star) {
            ListIter<OrbitalBody> planet = star->Satellites();
            while (++planet) {
                ListIter<OrbitalBody> moon = planet->Satellites();
                while (++moon) {
                    ListIter<OrbitalRegion> rgn = moon->Regions();
                    while (++rgn) {
                        SimRegion* sim_region = new SimRegion(this, rgn.value());
                        regions.append(sim_region);
                        if (!strcmp(active_region_name, sim_region->Name())) {
                            ActivateRegion(sim_region);
                        }
                    }
                }

                ListIter<OrbitalRegion> rgn = planet->Regions();
                while (++rgn) {
                    SimRegion* sim_region = new SimRegion(this, rgn.value());
                    regions.append(sim_region);
                    if (!strcmp(active_region_name, sim_region->Name())) {
                        ActivateRegion(sim_region);
                    }
                }
            }

            ListIter<OrbitalRegion> rgn = star->Regions();
            while (++rgn) {
                SimRegion* sim_region = new SimRegion(this, rgn.value());
                regions.append(sim_region);
                if (!strcmp(active_region_name, sim_region->Name())) {
                    ActivateRegion(sim_region);
                }
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
Sim::BuildLinks()
{
    ListIter<SimRegion> iter = regions;
    while (++iter) {
        SimRegion*     rgn = iter.value();
        OrbitalRegion* orb = rgn->GetOrbitalRegion();

        if (orb) {
            ListIter<Text> lnk_iter = orb->Links();
            while (++lnk_iter) {
                Text* t = lnk_iter.value();

                SimRegion* tgt = FindRegion(*t);

                if (tgt && !rgn->Links().contains(tgt))
                rgn->Links().append(tgt);
            }
        }
    }
}

void
Sim::CreateElements()
{
    ListIter<MissionElement> e_iter = mission->GetElements();
    while (++e_iter) {
        MissionElement* msn_elem = e_iter.value();

        // add element to a carrier?
        if (msn_elem->IsSquadron()) {
            Ship* carrier = FindShip(msn_elem->Carrier());
            if (carrier) {
                Hangar* hangar = carrier->GetHangar();

                if (hangar) {
                    int* def_load = 0;

                    if (msn_elem->Loadouts().size()) {
                        MissionLoad* m = msn_elem->Loadouts().at(0);

                        if (m->GetName().length()) {
                            ShipDesign* dsn = (ShipDesign*) msn_elem->GetDesign();
                            ListIter<ShipLoad> sl_iter = dsn->loadouts;
                            while (++sl_iter) {
                                ShipLoad* sl = sl_iter.value();

                                if (m->GetName() == sl->name)
                                def_load = sl->load;
                            }
                        }

                        if (!def_load) {
                            def_load = m->GetStations();
                        }
                    }

                    hangar->CreateSquadron(msn_elem->Name(), msn_elem->GetCombatGroup(),
                    msn_elem->GetDesign(), msn_elem->Count(),
                    msn_elem->GetIFF(),
                    def_load, msn_elem->MaintCount(), msn_elem->DeadCount());

                    Element* element = CreateElement(msn_elem->Name(),
                    msn_elem->GetIFF(),
                    msn_elem->MissionRole());

                    element->SetCarrier(carrier);
                    element->SetCombatGroup(msn_elem->GetCombatGroup());
                    element->SetCombatUnit(msn_elem->GetCombatUnit());
                    element->SetCount(msn_elem->Count());
                    element->SetRogue(false);
                    element->SetPlayable(false);
                    element->SetLoadout(def_load);
                }
            }
        }

        // create the element in space:
        else {
            Ship*       carrier  = 0;
            Hangar*     hangar   = 0;
            int         squadron = -1;
            int         slot     = 0;

            // first create the package element:
            Element* element = CreateElement(msn_elem->Name(),
            msn_elem->GetIFF(),
            msn_elem->MissionRole());

            element->SetPlayer(msn_elem->Player());
            element->SetCombatGroup(msn_elem->GetCombatGroup());
            element->SetCombatUnit(msn_elem->GetCombatUnit());
            element->SetCommandAILevel(msn_elem->CommandAI());
            element->SetHoldTime(msn_elem->HoldTime());
            element->SetZoneLock(msn_elem->ZoneLock() ? true : false);
            element->SetRogue(msn_elem->IsRogue());
            element->SetPlayable(msn_elem->IsPlayable());
            element->SetIntelLevel(msn_elem->IntelLevel());

            // if this is the player's element, make sure to activate the region:
            if (msn_elem->Player()) {
                SimRegion* rgn = FindRegion(msn_elem->Region());

                if (rgn && rgn != active_region)
                ActivateRegion(rgn);
            }

            // if element belongs to a squadron,
            // find the carrier, squadron, flight deck, etc.:
            if (msn_elem->Squadron().length() > 0) {
                MissionElement* squadron_elem = mission->FindElement(msn_elem->Squadron());

                if (squadron_elem) {
                    element->SetSquadron(msn_elem->Squadron());

                    Element* cmdr  = FindElement(squadron_elem->Carrier());

                    if (cmdr) {
                        element->SetCommander(cmdr);
                        carrier = cmdr->GetShip(1);

                        if (carrier) {
                            element->SetCarrier(carrier);
                            hangar = carrier->GetHangar();

                            for (int s = 0; s < hangar->NumSquadrons(); s++) {
                                if (hangar->SquadronName(s) == msn_elem->Squadron()) {
                                    squadron = s;
                                    break;
                                }
                            }
                        }
                    }
                }
            }

            else if (msn_elem->Commander().length() > 0) {
                Element* cmdr = FindElement(msn_elem->Commander());

                if (cmdr) {
                    element->SetCommander(cmdr);
                }
            }

            ListIter<Instruction> obj = msn_elem->Objectives();
            while (++obj) {
                Instruction* o     = obj.value();
                Instruction* instr = 0;

                instr = new Instruction(*o);

                element->AddObjective(instr);
            }

            if (msn_elem->Instructions().size() > 0) {
                ListIter<Text> instr = msn_elem->Instructions();
                while (++instr) {
                    element->AddInstruction(*instr);
                }
            }

            ListIter<Instruction> nav = msn_elem->NavList();
            while (++nav) {
                SimRegion* rgn = FindRegion(nav->RegionName());

                if (!rgn)
                rgn = FindRegion(msn_elem->Region());

                if (rgn) {
                    Instruction* npt = new
                    Instruction(rgn, nav->Location(), nav->Action());

                    npt->SetStatus(nav->Status());
                    npt->SetEMCON(nav->EMCON());
                    npt->SetFormation(nav->Formation());
                    npt->SetSpeed(nav->Speed());
                    npt->SetTarget(nav->TargetName());
                    npt->SetHoldTime(nav->HoldTime());
                    npt->SetFarcast(nav->Farcast());

                    element->AddNavPoint(npt);
                }
            }

            bool  alertPrep = false;
            int*  loadout   = 0;
            int   respawns  = msn_elem->RespawnCount();

            // if ships are to start on alert,
            // spot them onto the appropriate launch deck:
            if (hangar && element && msn_elem->Count() > 0 && msn_elem->IsAlert()) {
                FlightDeck*       deck  = 0;
                int               queue = 1000;
                const ShipDesign* dsn   = msn_elem->GetDesign();

                if (dsn) {
                    for (int i = 0; i < carrier->NumFlightDecks(); i++) {
                        FlightDeck* d  = carrier->GetFlightDeck(i);
                        int         dq = hangar->PreflightQueue(d);

                        if (d && d->IsLaunchDeck() && d->SpaceLeft(dsn->type) && dq < queue) {
                            queue = dq;
                            deck  = d;
                        }
                    }
                }

                if (deck) {
                    alertPrep = true;

                    // choose best loadout:
                    if (msn_elem->Loadouts().size()) {
                        MissionLoad* l = msn_elem->Loadouts().at(0);
                        if (l->GetName().length()) {
                            ListIter<ShipLoad> sl = ((ShipDesign*) dsn)->loadouts;
                            while (++sl) {
                                if (!_stricmp(sl->name, l->GetName()))
                                loadout = sl->load;
                            }
                        }

                        else {
                            loadout = l->GetStations();
                        }
                    }

                    element->SetLoadout(loadout);

                    for (int i = 0; i < msn_elem->Count(); i++) {
                        int   squadron = -1;
                        int   slot     = -1;

                        if (hangar->FindAvailSlot(msn_elem->GetDesign(), squadron, slot)) {
                            alertPrep = alertPrep &&
                            hangar->GotoAlert(squadron,
                            slot,
                            deck,
                            element,
                            loadout,
                            true,    // package for launch
                            true);   // expedite

                            HangarSlot* s         = (HangarSlot*) hangar->GetSlot(squadron, slot);
                            Ship*       alertShip = hangar->GetShip(s);

                            if (alertShip) {
                                alertShip->SetRespawnCount(respawns);

                                if (msn_elem->Player() == i+1) {
                                    if (alertShip->GetRegion()) {
                                        alertShip->GetRegion()->SetPlayerShip(alertShip);
                                    }
                                    else {
                                        ::Print("WARNING: alert ship '%s' region is null\n", alertShip->Name());
                                    }
                                }
                            }
                        }
                    }
                }
            }

            if (!alertPrep) {
                // then, create the ships:
                for (int i = 0; i < msn_elem->Count(); i++) {
                    MissionShip*   msn_ship = 0;
                    Text           sname    = msn_elem->GetShipName(i);
                    Text           rnum     = msn_elem->GetRegistry(i);
                    Text           rgn_name = msn_elem->Region();

                    if (msn_elem->Ships().size() > i) {
                        msn_ship = msn_elem->Ships()[i];
                        sname    = msn_ship->Name();
                        rnum     = msn_ship->RegNum();
                        rgn_name = msn_ship->Region();
                    }

                    Point l2 = msn_elem->Location();

                    if (msn_ship && fabs(msn_ship->Location().x) < 1e9) {
                        l2 = msn_ship->Location();
                    }
                    else if (i) {
                        Point offset = RandomPoint();
                        offset.z = Random(-1e3, 1e3);

                        if (msn_elem->Count() < 5)
                        offset *= 0.3;

                        l2 += offset;
                    }

                    // choose best loadout:
                    ListIter<MissionLoad> l = msn_elem->Loadouts();
                    while (++l) {
                        if ((l->GetShip() == i) || (l->GetShip() < 0 && loadout == 0)) {
                            if (l->GetName().length()) {
                                ListIter<ShipLoad> sl = ((ShipDesign*) msn_elem->GetDesign())->loadouts;
                                while (++sl) {
                                    if (!_stricmp(sl->name, l->GetName()))
                                    loadout = sl->load;
                                }
                            }

                            else {
                                loadout = l->GetStations();
                            }
                        }
                    }

                    element->SetLoadout(loadout);

                    Ship* ship = CreateShip(sname, rnum,
                    (ShipDesign*) msn_elem->GetDesign(),
                    rgn_name, l2,
                    msn_elem->GetIFF(),
                    msn_elem->CommandAI(),
                    loadout);

                    if (ship) {
                        double      heading  = msn_elem->Heading();
                        const Skin* skin     = msn_elem->GetSkin();

                        if (msn_ship) {
                            heading  = msn_ship->Heading();

                            if (msn_ship->GetSkin())
                            skin = msn_ship->GetSkin();
                        }

                        ship->SetRogue(msn_elem->IsRogue());
                        ship->SetInvulnerable(msn_elem->IsInvulnerable());
                        ship->SetHeading(0, 0, heading + PI);
                        ship->SetRespawnCount(respawns);
                        ship->UseSkin(skin);

                        if (!netgame)
                        ship->SetRespawnLoc(RandomPoint() * 2);

                        if (ship->IsStarship())
                        ship->SetHelmHeading(heading);

                        else if (ship->IsAirborne() && ship->AltitudeAGL() > 25)
                        ship->SetVelocity(ship->Heading() * 250);

                        if (element)
                        element->AddShip(ship);

                        if (hangar)
                        hangar->FindSlot(ship, squadron, slot, Hangar::ACTIVE);

                        if (ship->GetRegion() && msn_elem->Player() == i+1)
                        ship->GetRegion()->SetPlayerShip(ship);

                        if (ship->NumFlightDecks()) {
                            for (int i = 0; i < ship->NumFlightDecks(); i++) {
                                FlightDeck* deck = ship->GetFlightDeck(i);
                                if (deck)
                                deck->Orient(ship);
                            }
                        }

                        if (msn_ship) {
                            ship->SetVelocity(msn_ship->Velocity().OtherHand());
                            ship->SetIntegrity((float) msn_ship->Integrity());
                            ship->SetRespawnCount(msn_ship->Respawns());

                            if (msn_ship->Ammo()[0] > -10) {
                                for (int i = 0; i < 64; i++) {
                                    Weapon* w = ship->GetWeaponByIndex(i+1);
                                    if (w)
                                    w->SetAmmo(msn_ship->Ammo()[i]);
                                    else
                                    break;
                                }
                            }

                            if (msn_ship->Fuel()[0] > -10) {
                                for (int i = 0; i < 4; i++) {
                                    if (ship->Reactors().size() > i) {
                                        PowerSource* p = ship->Reactors()[i];
                                        p->SetCapacity(msn_ship->Fuel()[i]);
                                    }
                                }
                            }

                            if (msn_ship->Decoys() > -10) {
                                Weapon* w = ship->GetDecoy();
                                if (w)
                                w->SetAmmo(msn_ship->Decoys());
                            }

                            if (msn_ship->Probes() > -10) {
                                Weapon* w = ship->GetProbeLauncher();
                                if (w)
                                w->SetAmmo(msn_ship->Probes());
                            }
                        }

                        Shield* shield = ship->GetShield();

                        if (shield) {
                            shield->SetPowerLevel(50);
                        }

                        if (ship->Class() > Ship::FRIGATE) {
                            ListIter<WeaponGroup> iter = ship->Weapons();
                            while (++iter) {
                                WeaponGroup* weapon = iter.value();

                                // anti-air weapon?
                                if (weapon->GetDesign()->target_type & Ship::DRONE) {
                                    weapon->SetFiringOrders(Weapon::POINT_DEFENSE);
                                }
                                else {
                                    weapon->SetFiringOrders(Weapon::MANUAL);
                                }
                            }
                        }

                        if (ship->Class() > Ship::DRONE && ship->Class() < Ship::STATION) {
                            ShipStats* stats = ShipStats::Find(sname);
                            if (stats) {
                                char design[64];
                                sprintf_s(design, "%s %s", ship->Abbreviation(), ship->Design()->display_name);
                                stats->SetType(design);
                                stats->SetShipClass(ship->Class());
                                stats->SetRole(Mission::RoleName(msn_elem->MissionRole()));
                                stats->SetIFF(ship->GetIFF());
                                stats->SetRegion(msn_elem->Region());
                                stats->SetCombatGroup(msn_elem->GetCombatGroup());
                                stats->SetCombatUnit(msn_elem->GetCombatUnit());
                                stats->SetPlayer(msn_elem->Player() == i+1);
                                stats->SetElementIndex(ship->GetElementIndex());
                            }
                        }
                    }  // ship
                }     // count
            }
        }
    }
}

void
Sim::CopyEvents()
{
    events.destroy();

    if (mission) {
        ListIter<MissionEvent> iter = mission->GetEvents();
        while (++iter) {
            MissionEvent* orig = iter.value();
            MissionEvent* event = new MissionEvent(*orig);
            events.append(event);
        }
    }
}

// +--------------------------------------------------------------------+

const char*
Sim::FindAvailCallsign(int IFF)
{
    const char* call = "Unidentified";

    for (int i = 0; i < 32; i++) {
        call = Callsign::GetCallsign(IFF);

        if (!FindElement(call))
        break;
    }

    return call;
}

Element*
Sim::CreateElement(const char* callsign, int IFF, int type)
{
    Element* elem = new Element(callsign, IFF, type);
    elements.append(elem);
    return elem;
}

void
Sim::DestroyElement(Element* elem)
{
    if (elements.contains(elem))
    elements.remove(elem);

    delete elem;
}

Element*
Sim::FindElement(const char* name)
{
    ListIter<Element> iter = elements;

    while (++iter) {
        Element* elem  = iter.value();
        Text     ename = elem->Name();

        if (ename == name)
        return elem;
    }

    return 0;
}

// +--------------------------------------------------------------------+

int
Sim::GetAssignedElements(Element* elem, List<Element>& assigned)
{
    assigned.clear();

    if (elem) {
        for (int i = 0; i < elements.size(); i++) {
            Element* e = elements.at(i);
            if (!e->IsSquadron() && e->GetAssignment() == elem)
            assigned.append(e);
        }
    }

    return assigned.size();
}

// +--------------------------------------------------------------------+

Ship*
Sim::CreateShip(const char* name, const char* reg_num, ShipDesign* design, const char* rgn_name, const Point& loc, int IFF, int cmd_ai, const int* loadout)
{
    if (!design) {
        Print("WARNING: CreateShip(%s): invalid design\n", name);
        return 0;
    }

    SimRegion* rgn = FindRegion(rgn_name);

    if (!rgn) {
        return 0;
    }

    Ship* ship = new Ship(name, reg_num, design, IFF, cmd_ai, loadout);
    ship->MoveTo(loc.OtherHand());

    if (rgn) {
        Print("Inserting Ship(%s) into Region(%s) (%s)\n", ship->Name(), rgn->Name(), FormatGameTime());
        rgn->InsertObject(ship);

        if (ship->IsAirborne() && ship->AltitudeAGL() > 25)
        ship->SetVelocity(ship->Heading() * 250);
    }

    return ship;
}

Ship*
Sim::FindShip(const char* name, const char* rgn_name)
{
    Ship* ship = 0;

    if (rgn_name) {
        SimRegion* rgn = FindRegion(rgn_name);
        if (rgn)
        ship = rgn->FindShip(name);
    }

    if (!ship) {
        ListIter<SimRegion> rgn = regions;
        while (++rgn && !ship)
        ship = rgn->FindShip(name);
    }

    return ship;
}

void
Sim::DestroyShip(Ship* ship)
{
    SimRegion* rgn = ship->GetRegion();
    if (rgn)
    rgn->DestroyShip(ship);
}

void
Sim::NetDockShip(Ship* ship, Ship* carrier, FlightDeck* deck)
{
    SimRegion* rgn = ship->GetRegion();
    if (rgn)
    rgn->NetDockShip(ship, carrier, deck);
}

Ship*
Sim::FindShipByObjID(std::uint32_t objid)
{
    Ship* ship = 0;

    ListIter<SimRegion> rgn = regions;
    while (++rgn && !ship)
    ship = rgn->FindShipByObjID(objid);

    return ship;
}

Shot*
Sim::FindShotByObjID(std::uint32_t objid)
{
    Shot* shot = 0;

    ListIter<SimRegion> rgn = regions;
    while (++rgn && !shot)
    shot = rgn->FindShotByObjID(objid);

    return shot;
}

// +--------------------------------------------------------------------+

Orbital*
Sim::FindOrbitalBody(const char* name)
{
    Orbital* body = 0;

    if (mission) {
        ListIter<StarSystem> iter = mission->GetSystemList();
        while (++iter && !body) {
            StarSystem* sys = iter.value();
            body = sys->FindOrbital(name);
        }
    }

    return body;
}


// +--------------------------------------------------------------------+

Shot*
Sim::CreateShot(const Point& pos, const Camera& shot_cam, WeaponDesign* design, const Ship* ship, SimRegion* rgn)
{
    Shot* shot = 0;

    if (design->drone)
    shot = new Drone(pos, shot_cam, design, ship);
    else
    shot = new Shot( pos, shot_cam, design, ship);

    if (rgn)
    rgn->InsertObject(shot);

    else if (active_region)
    active_region->InsertObject(shot);

    return shot;
}

// +--------------------------------------------------------------------+

Explosion*
Sim::CreateExplosion(const Point& pos, const Point& vel, int type, float exp_scale, float part_scale, SimRegion* rgn, SimObject* source, System* sys)
{
    // don't bother creating explosions that can't be seen:
    if (!rgn || !active_region || rgn != active_region)
    return 0;

    Explosion* exp = new Explosion(type, pos, vel, exp_scale, part_scale, rgn, source);

    if (rgn)
    rgn->InsertObject(exp);

    else if (active_region)
    active_region->InsertObject(exp);

    return exp;
}

// +--------------------------------------------------------------------+

Debris*
Sim::CreateDebris(const Point& pos, const Point& vel, Model* model, double mass, SimRegion* rgn)
{
    Debris* debris = new Debris(model, pos, vel, mass);

    if (rgn)
    rgn->InsertObject(debris);

    else if (active_region)
    active_region->InsertObject(debris);

    return debris;
}

// +--------------------------------------------------------------------+

Asteroid*
Sim::CreateAsteroid(const Point& pos, int t, double mass, SimRegion* rgn)
{
    Asteroid* asteroid = new Asteroid(t, pos, mass);

    if (rgn)
    rgn->InsertObject(asteroid);

    else if (active_region)
    active_region->InsertObject(asteroid);

    return asteroid;
}

// +--------------------------------------------------------------------+

void
Sim::CreateSplashDamage(Ship* ship)
{
    if (ship && ship->GetRegion() && ship->Design()->splash_radius > 1) {
        SimSplash* splash = new
        SimSplash(ship->GetRegion(),
        ship->Location(),
        ship->Design()->integrity / 4,
        ship->Design()->splash_radius);

        splash->owner_name = ship->Name();
        splashlist.append(splash);
    }
}

// +--------------------------------------------------------------------+

void
Sim::CreateSplashDamage(Shot* shot)
{
    if (shot && shot->GetRegion()) {
        double damage = shot->Damage();
        if (damage < shot->Design()->damage)
        damage = shot->Design()->damage;

        SimSplash* splash = new
        SimSplash(shot->GetRegion(),
        shot->Location(),
        damage,
        shot->Design()->lethal_radius);

        if (shot->Owner())
        splash->owner_name = shot->Owner()->Name();

        splash->missile = shot->IsMissile();

        splashlist.append(splash);
        CreateExplosion(shot->Location(), Point(), Explosion::SHOT_BLAST, 20.0f, 1.0f, shot->GetRegion());
    }
}

// +--------------------------------------------------------------------+

void
Sim::ShowGrid(int show)
{
    Player* player = Player::GetCurrentPlayer();

    if (player && player->GridMode() == 0) {
        show       = 0;
        grid_shown = false;
    }

    ListIter<SimRegion> rgn = regions;
    while (++rgn) {
        rgn->ShowGrid(show);
    }

    grid_shown = show?true:false;
}

bool
Sim::GridShown() const
{
    return grid_shown;
}

// +--------------------------------------------------------------------+

List<StarSystem>&
Sim::GetSystemList()
{
    if (mission)
    return mission->GetSystemList();

    static List<StarSystem> dummy_system_list;
    return dummy_system_list;
}

// +--------------------------------------------------------------------+

void
Sim::NextView()
{
    if (active_region)
    active_region->NextView();
}

Ship*
Sim::GetPlayerShip()
{
    if (active_region)
    return active_region->GetPlayerShip();

    Starshatter* stars = Starshatter::GetInstance();
    if (stars && stars->InCutscene()) {
        Ship* player = 0;

        ListIter<SimRegion> rgn = regions;
        while (++rgn && !player) {
            player = rgn->GetPlayerShip();
        }

        return player;
    }

    return 0;
}

Element*
Sim::GetPlayerElement()
{
    Element* elem = 0;

    for (int i = 0; i < elements.size(); i++) {
        Element* e = elements[i];

        if (e->Player() > 0)
        elem = e;
    }

    return elem;
}

bool
Sim::IsSelected(Ship* s)
{
    if (active_region)
    return active_region->IsSelected(s);

    return false;
}

ListIter<Ship>
Sim::GetSelection()
{
    if (active_region)
    return active_region->GetSelection();

    static List<Ship> empty;
    return empty;
}

void
Sim::ClearSelection()
{
    if (active_region)
    active_region->ClearSelection();
}

void
Sim::AddSelection(Ship* s)
{
    if (active_region)
    active_region->AddSelection(s);
}

void
Sim::SetSelection(Ship* newsel)
{
    if (active_region)
    active_region->SetSelection(newsel);
}

// +--------------------------------------------------------------------+

void
Sim::SetTestMode(bool t)
{
    test_mode    = t;
    Ship* pship  = GetPlayerShip();

    if (pship)
    if (IsTestMode())
    pship->SetControls(0);
    else
    pship->SetControls(ctrl);
}

// +--------------------------------------------------------------------+

SimRegion*
Sim::FindRegion(const char* name)
{
    ListIter<SimRegion> rgn = regions;
    while (++rgn)
    if (rgn->name == name)
    return rgn.value();

    return 0;
}

SimRegion*
Sim::FindRegion(OrbitalRegion* orgn)
{
    ListIter<SimRegion> rgn = regions;
    while (++rgn)
    if (rgn->orbital_region == orgn)
    return rgn.value();

    return 0;
}

// +--------------------------------------------------------------------+

SimRegion*
Sim::FindNearestSpaceRegion(SimObject* object)
{
    return FindNearestRegion(object, REAL_SPACE);
}

SimRegion*
Sim::FindNearestTerrainRegion(SimObject* object)
{
    return FindNearestRegion(object, AIR_SPACE);
}

SimRegion*
Sim::FindNearestRegion(SimObject* object, int type)
{
    if (!object) return 0;

    SimRegion*  result   = 0;
    double      distance = 1.0e40;
    Point       objloc   = object->Location();

    objloc = objloc.OtherHand();

    if (object->GetRegion())
    objloc += object->GetRegion()->Location();

    ListIter<SimRegion> rgn = regions;
    while (++rgn) {
        if (rgn->Type() == type) {
            OrbitalRegion* orgn = rgn->GetOrbitalRegion();
            if (orgn) {
                double test = fabs((orgn->Location() - objloc).length());
                if (test < distance) {
                    result = rgn.value();
                    distance = test;
                }
            }
        }
    }

    return result;
}

SimRegion*
Sim::FindNearestSpaceRegion(Orbital* body)
{
    SimRegion*  result   = 0;

    if (!body)
    return result;

    ListIter<SimRegion> rgn = regions;
    while (++rgn && !result) {
        if (rgn->IsOrbital()) {
            OrbitalRegion* orgn = rgn->GetOrbitalRegion();
            if (orgn) {
                ListIter<OrbitalRegion> iter = body->Regions();
                while (++iter) {
                    if (iter.value() == orgn)
                    result = rgn.value();
                }
            }
        }
    }

    return result;
}

// +--------------------------------------------------------------------+

bool
Sim::ActivateRegion(SimRegion* rgn)
{
    if (rgn && active_region != rgn && regions.contains(rgn)) {
        if (active_region)
        active_region->Deactivate();

        if (!active_region || active_region->System() != rgn->System()) {
            if (active_region)
            active_region->System()->Deactivate();
            rgn->System()->Activate(scene);
        }

        active_region = rgn;
        star_system   = active_region->System();

        if (star_system) {
            star_system->SetActiveRegion(active_region->orbital_region);
        }
        else {
            ::Print("WARNING: Sim::ActivateRegion() No star system found for rgn '%s'", rgn->Name());
        }

        active_region->Activate();
        return true;
    }

    return false;
}

// +--------------------------------------------------------------------+

void
Sim::RequestHyperJump(Ship* obj, SimRegion* rgn, const Point& loc,
int type, Ship* fc1, Ship* fc2)
{
    bool hyperdrive = false;

    if (obj->GetQuantumDrive() && obj->GetQuantumDrive()->Subtype() == QuantumDrive::HYPER)
    hyperdrive = true;

    jumplist.append(new SimHyper(obj, rgn, loc, type, hyperdrive, fc1, fc2));
}

// +--------------------------------------------------------------------+

void
Sim::ExecFrame(double seconds)
{
    if (first_frame) {
        first_frame = false;
        netgame = NetGame::Create();
    }

    if (netgame)
    netgame->ExecFrame();

    if (regions.isEmpty()) {
        active_region = 0;
        rgn_queue.clear();
        jumplist.destroy();
        scene.Collect();
        return;
    }

    ListIter<Element> elem = elements;
    while (++elem)
    if (!elem->IsSquadron())
    elem->ExecFrame(seconds);

    ListIter<SimRegion> rgn = regions;
    while (++rgn)
    if (rgn.value() != active_region && rgn->NumShips() && !rgn_queue.contains(rgn.value()))
    rgn_queue.append(rgn.value());

    // execframe for one inactive sim region:
    if (rgn_queue.size()) {
        SimRegion* exec_rgn = rgn_queue.removeIndex(0);

        while (exec_rgn && (exec_rgn->NumShips() == 0 || exec_rgn == active_region))
        if (rgn_queue.size())
        exec_rgn = rgn_queue.removeIndex(0);
        else
        exec_rgn = 0;

        if (exec_rgn)
        exec_rgn->ExecFrame(seconds);
    }

    if (active_region)
    active_region->ExecFrame(seconds);

    ExecEvents(seconds);
    ResolveHyperList();
    ResolveSplashList();

    // GC all the dead objects:
    scene.Collect();

    if (!IsTestMode()) {
        ListIter<Element> e_iter = elements;
        while (++e_iter) {
            Element* elem = e_iter.value();
            if (!elem->IsSquadron() && elem->IsFinished()) {
                finished.append(e_iter.removeItem());
            }
        }
    }

    // setup music
    if (!MusicDirector::IsNoMusic()) {
        Starshatter* stars = Starshatter::GetInstance();
        if (stars && stars->GetGameMode() == Game::PLAY_MODE) {
            Ship* player_ship = GetPlayerShip();
            if (player_ship) {
                int phase = player_ship->GetFlightPhase();

                if (phase < Ship::ACTIVE) {
                    MusicDirector::SetMode(MusicDirector::LAUNCH);
                }

                else if (phase > Ship::ACTIVE) {
                    MusicDirector::SetMode(MusicDirector::RECOVERY);
                }

                else {
                    if (player_ship->IsInCombat()) {
                        MusicDirector::SetMode(MusicDirector::COMBAT);
                    }

                    else {
                        MusicDirector::SetMode(MusicDirector::FLIGHT);
                    }
                }
            }
        }
    }
}

void
Sim::ExecEvents(double seconds)
{
    ListIter<MissionEvent> iter = events;
    while (++iter) {
        MissionEvent* event = iter.value();
        event->ExecFrame(seconds);
    }
}

void
Sim::ResolveHyperList()
{
    // resolve the hyper space transitions:
    if (jumplist.size()) {
        Ship* pship = GetPlayerShip();

        ListIter<SimHyper> j_iter = jumplist;
        while (++j_iter) {
            SimHyper*   jump     = j_iter.value();
            Ship*       jumpship = jump->ship;

            if (jumpship) {
                SimRegion* dest = jump->rgn;

                if (!dest)
                dest = FindNearestSpaceRegion(jumpship);

                if (dest) {
                    // bring along fighters on deck:
                    ListIter<FlightDeck> deck = jumpship->FlightDecks();
                    while (++deck) {
                        for (int i = 0; i < deck->NumSlots(); i++) {
                            Ship* s = deck->GetShip(i);

                            if (s) {
                                dest->InsertObject(s);
                                s->ClearTrack();
                            }
                        }
                    }

                    if (jump->type == 0 && !jump->hyperdrive) {
                        // bring along nearby ships:
                        // have to do it in two parts, because inserting the ships
                        // into the destination corrupts the iter over the current
                        // region's list of ships...

                        // part one: gather the ships that will be jumping:
                        List<Ship> riders;
                        ListIter<Ship> neighbor = jumpship->GetRegion()->Ships();
                        while (++neighbor) {
                            if (neighbor->IsDropship()) {
                                Ship* s = neighbor.value();
                                if (s == jumpship) continue;

                                Point delta = s->Location() - jumpship->Location();

                                if (delta.length() < 5e3) {
                                    riders.append(s);
                                }
                            }
                        }

                        // part two: now transfer the list to the destination:
                        for (int i = 0; i < riders.size(); i++) {
                            Ship* s = riders[i];
                            Point delta = s->Location() - jumpship->Location();
                            dest->InsertObject(s);
                            s->MoveTo(jump->loc.OtherHand() + delta);
                            s->ClearTrack();

                            if (jump->fc_dst) {
                                double r = jump->fc_dst->Roll();
                                double p = jump->fc_dst->Pitch();
                                double w = jump->fc_dst->Yaw();

                                s->SetAbsoluteOrientation(r, p, w);
                                s->SetVelocity(jump->fc_dst->Heading() * 500);
                            }

                            ProcessEventTrigger(MissionEvent::TRIGGER_JUMP, 0, s->Name());
                            NetUtil::SendObjHyper(s, dest->Name(), jump->loc, jump->fc_src, jump->fc_dst, jump->type);
                        }
                    }

                    // now it is safe to move the main jump ship:
                    dest->InsertObject(jumpship);
                    jumpship->MoveTo(jump->loc.OtherHand());
                    jumpship->ClearTrack();

                    ProcessEventTrigger(MissionEvent::TRIGGER_JUMP, 0, jumpship->Name());
                    NetUtil::SendObjHyper(jumpship, dest->Name(), jump->loc, jump->fc_src, jump->fc_dst, jump->type);

                    // if using farcaster:
                    if (jump->fc_src) {
                        ::Print("Ship '%s' farcast to '%s'\n", jumpship->Name(), dest->Name());
                        CreateExplosion(jumpship->Location(), Point(0,0,0), Explosion::QUANTUM_FLASH, 1.0f, 0, dest);

                        if (jump->fc_dst) {
                            double r = jump->fc_dst->Roll();
                            double p = jump->fc_dst->Pitch();
                            double w = jump->fc_dst->Yaw();

                            jumpship->SetAbsoluteOrientation(r, p, w);
                            jumpship->SetVelocity(jump->fc_dst->Heading() * 500);
                        }

                        jumpship->SetHelmHeading(jumpship->CompassHeading());
                        jumpship->SetHelmPitch(0);
                    }

                    // break orbit:
                    else if (jump->type == Ship::TRANSITION_DROP_ORBIT) {
                        ::Print("Ship '%s' broke orbit to '%s'\n", jumpship->Name(), dest->Name());
                        jumpship->SetAbsoluteOrientation(0,PI/4,0);
                        jumpship->SetVelocity(jumpship->Heading() * 1.0e3);
                    }

                    // make orbit:
                    else if (jump->type == Ship::TRANSITION_MAKE_ORBIT) {
                        ::Print("Ship '%s' achieved orbit '%s'\n", jumpship->Name(), dest->Name());
                        jumpship->LookAt(Point(0,0,0));
                        jumpship->SetVelocity(jumpship->Heading() * 500.0);
                    }

                    // hyper jump:
                    else {
                        ::Print("Ship '%s' quantum to '%s'\n", jumpship->Name(), dest->Name());

                        if (jump->hyperdrive)
                        CreateExplosion(jumpship->Location(), Point(0,0,0), Explosion::HYPER_FLASH,   1, 1, dest);
                        else
                        CreateExplosion(jumpship->Location(), Point(0,0,0), Explosion::QUANTUM_FLASH, 1, 0, dest);

                        jumpship->LookAt(Point(0,0,0));
                        jumpship->SetVelocity(jumpship->Heading() * 500.0);
                        jumpship->SetHelmHeading(jumpship->CompassHeading());
                        jumpship->SetHelmPitch(0);
                    }
                }

                else if (regions.size() > 1) {
                    ::Print("Warning: Unusual jump request for ship '%s'\n", jumpship->Name());
                    regions[1]->InsertObject(jumpship);
                }

                Sensor* sensor = jumpship->GetSensor();
                if (sensor)
                sensor->ClearAllContacts();
            }
        }

        jumplist.destroy();

        if (pship && pship->GetRegion()) {
            if (active_region != pship->GetRegion()) {
                pship->GetRegion()->SetPlayerShip(pship);
            }
        }
    }
}

void
Sim::ResolveSplashList()
{
    if (splashlist.size()) {
        ListIter<SimSplash> iter = splashlist;
        while (++iter) {
            SimSplash* splash = iter.value();

            if (!splash->rgn)
            continue;

            // damage ships:
            ListIter<Ship> s_iter = splash->rgn->Ships();
            while (++s_iter) {
                Ship* ship = s_iter.value();

                double distance = (ship->Location() - splash->loc).length();

                if (distance > 1 && distance < splash->range) {
                    double damage = splash->damage * (1 - distance/splash->range);
                    if (!NetGame::IsNetGameClient()) {
                        ship->InflictDamage(damage);
                    }

                    int ship_destroyed = (!ship->InTransition() && ship->Integrity() < 1.0f);

                    // then delete the ship:
                    if (ship_destroyed) {
                        NetUtil::SendObjKill(ship, 0, NetObjKill::KILL_MISC);
                        Print("    %s Killed %s (%s)\n", (const char*) splash->owner_name, ship->Name(), FormatGameTime());

                        // record the kill
                        ShipStats* killer = ShipStats::Find(splash->owner_name);
                        if (killer) {
                            if (splash->missile)
                            killer->AddEvent(SimEvent::MISSILE_KILL, ship->Name());
                            else
                            killer->AddEvent(SimEvent::GUNS_KILL, ship->Name());
                        }

                        Ship* owner = FindShip(splash->owner_name, splash->rgn->Name());
                        if (owner && owner->GetIFF() != ship->GetIFF()) {
                            if (ship->GetIFF() > 0 || owner->GetIFF() > 1) {
                                killer->AddPoints(ship->Value());

                                Element* elem = owner->GetElement();
                                if (elem) {
                                    if (owner->GetElementIndex() > 1) {
                                        Ship* s = elem->GetShip(1);

                                        if (s) {
                                            ShipStats* cmdr_stats = ShipStats::Find(s->Name());
                                            if (cmdr_stats) {
                                                cmdr_stats->AddCommandPoints(ship->Value()/2);
                                            }
                                        }
                                    }

                                    Element* cmdr = elem->GetCommander();
                                    if (cmdr) {
                                        Ship* s = cmdr->GetShip(1);

                                        if (s) {
                                            ShipStats* cmdr_stats = ShipStats::Find(s->Name());
                                            if (cmdr_stats) {
                                                cmdr_stats->AddCommandPoints(ship->Value()/2);
                                            }
                                        }
                                    }
                                }
                            }
                        }

                        ShipStats* killee = ShipStats::Find(ship->Name());
                        if (killee)
                        killee->AddEvent(SimEvent::DESTROYED, splash->owner_name);

                        ship->DeathSpiral();
                    }
                }
            }

            // damage drones:
            ListIter<Drone> drone_iter = splash->rgn->Drones();
            while (++drone_iter) {
                Drone* drone = drone_iter.value();

                double distance = (drone->Location() - splash->loc).length();

                if (distance > 1 && distance < splash->range) {
                    double damage = splash->damage * (1 - distance/splash->range);
                    drone->InflictDamage(damage);

                    int destroyed = (drone->Integrity() < 1.0f);

                    // then mark the drone for deletion:
                    if (destroyed) {
                        NetUtil::SendWepDestroy(drone);
                        sim->CreateExplosion(drone->Location(), drone->Velocity(), 21 /* was LARGE_EXP */, 1.0f, 1.0f, splash->rgn);
                        drone->SetLife(0);
                    }
                }
            }
        }

        splashlist.destroy();
    }
}

// +--------------------------------------------------------------------+

void
Sim::ProcessEventTrigger(int type, int event_id, const char* ship, int param)
{
    Text ship_name = ship;

    ListIter<MissionEvent> iter = events;
    while (++iter) {
        MissionEvent* event = iter.value();

        if (event->IsPending() && event->Trigger() == type) {
            switch (type) {
            case MissionEvent::TRIGGER_DAMAGE:
            case MissionEvent::TRIGGER_DESTROYED:
            case MissionEvent::TRIGGER_JUMP:
            case MissionEvent::TRIGGER_LAUNCH:
            case MissionEvent::TRIGGER_DOCK:
            case MissionEvent::TRIGGER_TARGET:
                if (event->TriggerParam() <= param) {
                    if (ship_name.indexOf(event->TriggerShip()) == 0)
                    event->Activate();
                }
                break;

            case MissionEvent::TRIGGER_NAVPT:
                if (event->TriggerParam() == param) {
                    if (ship_name.indexOf(event->TriggerShip()) == 0)
                    event->Activate();
                }
                break;

            case MissionEvent::TRIGGER_EVENT:
            case MissionEvent::TRIGGER_SKIPPED:
                if (event->TriggerParam() == event_id)
                event->Activate();
                break;
            }
        }
    }
}

double
Sim::MissionClock() const
{
    return starshatter::engine::MissionTime();
}

// +--------------------------------------------------------------------+

void
Sim::SkipCutscene()
{
    Starshatter* stars = Starshatter::GetInstance();
    if (stars && stars->InCutscene()) {
        ListIter<MissionEvent>  iter     = events;
        bool                    end      = false;
        double                  end_time = 0;

        while (++iter && !end) {
            MissionEvent* event = iter.value();

            if (event->IsPending() || event->IsActive()) {
                if (event->Event() == MissionEvent::END_SCENE ||
                        event->Event() == MissionEvent::END_MISSION) {
                    end = true;
                    end_time = event->Time();
                }

                if (event->Event() == MissionEvent::FIRE_WEAPON) {
                    event->Skip();
                }

                else {
                    event->Activate();
                    event->Execute(true);
                }
            }
        }

        const auto skip_time = end_time - MissionClock();
        if (skip_time > 0) {
            Clock::GetInstance()->SkipGameTime(skip_time);
        }
    }
}

// +--------------------------------------------------------------------+

void
Sim::ResolveTimeSkip(double seconds)
{
    double skipped   = 0;

    // allow elements to process hold time, and release as needed:
    ListIter<Element> elem = elements;
    while (++elem)
    elem->ExecFrame(seconds);

    // step through the skip, ten seconds at a time:
    if (active_region) {
        double total_skip = seconds;
        double frame_skip = 10;
        Ship*  player     = GetPlayerShip();

        while (total_skip > frame_skip) {
            if (active_region->CanTimeSkip()) {
                active_region->ResolveTimeSkip(frame_skip);
                total_skip -= frame_skip;
                skipped    += frame_skip;
            }
            // break out early if player runs into bad guys...
            else {
                total_skip = 0;
            }
        }

        if (total_skip > 0)
        active_region->ResolveTimeSkip(total_skip);
        skipped += total_skip;
    }

    // give player control after time skip:
    Ship* player_ship = GetPlayerShip();
    if (player_ship) {
        player_ship->SetAutoNav(false);
        player_ship->SetThrottle(75);

        HUDView* hud = HUDView::GetInstance();
        if (hud)
        hud->SetHUDMode(HUDView::HUD_MODE_TAC);

        if (IsTestMode())
        player_ship->SetControls(0);
    }

    Clock::GetInstance()->SkipGameTime(skipped);
    CameraDirector::SetCameraMode(CameraDirector::MODE_COCKPIT);
}

// +--------------------------------------------------------------------+

ListIter<MissionElement>
Sim::GetMissionElements()
{
    mission_elements.destroy();

    ListIter<Element> iter = elements;
    while (++iter) {
        Element* elem = iter.value();

        int num_live_ships = 0;

        for (int i = 0; i < elem->NumShips(); i++) {
            Ship* s = elem->GetShip(i+1);

            if (s && !s->IsDying() && !s->IsDead())
            num_live_ships++;
        }

        if (elem->IsSquadron() || num_live_ships > 0) {
            MissionElement* msn_elem = CreateMissionElement(elem);

            if (msn_elem)
            mission_elements.append(msn_elem);
        }
    }

    return mission_elements;
}

MissionElement*
Sim::CreateMissionElement(Element* elem)
{
    MissionElement* msn_elem = 0;

    if (elem->IsSquadron()) {
        if (!elem->GetCarrier() || elem->GetCarrier()->Integrity() < 1)
        return msn_elem;
    }

    if (elem && !elem->IsNetObserver()) {
        msn_elem = new MissionElement;

        msn_elem->SetName(elem->Name());
        msn_elem->SetIFF(elem->GetIFF());
        msn_elem->SetMissionRole(elem->Type());

        if (elem->IsSquadron() && elem->GetCarrier()) {
            Ship* carrier = elem->GetCarrier();

            msn_elem->SetCarrier(carrier->Name());
            msn_elem->SetCount(elem->GetCount());
            msn_elem->SetLocation(carrier->Location().OtherHand());

            if (carrier->GetRegion())
            msn_elem->SetRegion(carrier->GetRegion()->Name());

            int      squadron_index = 0;
            Hangar*  hangar = FindSquadron(elem->Name(), squadron_index);

            if (hangar) {
                msn_elem->SetDeadCount(hangar->NumShipsDead(squadron_index));
                msn_elem->SetMaintCount(hangar->NumShipsMaint(squadron_index));

                const ShipDesign* design = hangar->SquadronDesign(squadron_index);
                msn_elem->SetDesign(design);

                Text design_path = design->path_name;
                design_path.setSensitive(false);

                if (design_path.indexOf("/Mods/Ships") == 0) {
                    design_path = design_path.substring(11, 1000);
                    msn_elem->SetPath(design_path);
                }
            }
        }

        else {
            msn_elem->SetSquadron(elem->GetSquadron());
            msn_elem->SetCount(elem->NumShips());
        }

        if (elem->GetCommander())
        msn_elem->SetCommander(elem->GetCommander()->Name());

        msn_elem->SetCombatGroup(elem->GetCombatGroup());
        msn_elem->SetCombatUnit(elem->GetCombatUnit());

        Ship* ship = elem->GetShip(1);
        if (ship) {
            if (ship->GetRegion())
            msn_elem->SetRegion(ship->GetRegion()->Name());

            msn_elem->SetLocation(ship->Location().OtherHand());
            msn_elem->SetDesign(ship->Design());

            msn_elem->SetPlayer(elem->Player());
            msn_elem->SetCommandAI(elem->GetCommandAILevel());
            msn_elem->SetHoldTime((int) elem->GetHoldTime());
            msn_elem->SetZoneLock(elem->GetZoneLock());
            msn_elem->SetHeading(ship->CompassHeading());

            msn_elem->SetPlayable(elem->IsPlayable());
            msn_elem->SetRogue(elem->IsRogue());
            msn_elem->SetIntelLevel(elem->IntelLevel());

            Text design_path = ship->Design()->path_name;
            design_path.setSensitive(false);

            if (design_path.indexOf("/Mods/Ships") == 0) {
                design_path = design_path.substring(11, 1000);
                msn_elem->SetPath(design_path);
            }

            msn_elem->SetRespawnCount(ship->RespawnCount());
        }

        MissionLoad* loadout = new MissionLoad;
        CopyMemory(loadout->GetStations(), elem->Loadout(), 16 * sizeof(int));

        msn_elem->Loadouts().append(loadout);

        int num_obj = elem->NumObjectives();
        for (int i = 0; i < num_obj; i++) {
            Instruction* o     = elem->GetObjective(i);
            Instruction* instr = 0;

            instr = new Instruction(*o);

            msn_elem->AddObjective(instr);
        }

        int num_inst = elem->NumInstructions();
        for (int i = 0; i < num_inst; i++) {
            Text instr = elem->GetInstruction(i);
            msn_elem->AddInstruction(instr);
        }

        ListIter<Instruction> nav_iter = elem->GetFlightPlan();
        while (++nav_iter) {
            Instruction* nav = nav_iter.value();
            Instruction* npt = new
            Instruction(nav->RegionName(), nav->Location(), nav->Action());

            npt->SetFormation(nav->Formation());
            npt->SetSpeed(nav->Speed());
            npt->SetTarget(nav->TargetName());
            npt->SetHoldTime(nav->HoldTime());
            npt->SetFarcast(nav->Farcast());
            npt->SetStatus(nav->Status());

            msn_elem->AddNavPoint(npt);
        }

        for (int i = 0; i < elem->NumShips(); i++) {
            ship = elem->GetShip(i+1);

            if (ship) {
                MissionShip* s = new MissionShip;

                s->SetName(ship->Name());
                s->SetRegNum(ship->Registry());
                s->SetRegion(ship->GetRegion()->Name());
                s->SetLocation(ship->Location().OtherHand());
                s->SetVelocity(ship->Velocity().OtherHand());

                s->SetRespawns(ship->RespawnCount());
                s->SetHeading(ship->CompassHeading());
                s->SetIntegrity(ship->Integrity());

                if (ship->GetDecoy())
                s->SetDecoys(ship->GetDecoy()->Ammo());

                if (ship->GetProbeLauncher())
                s->SetProbes(ship->GetProbeLauncher()->Ammo());

                int n;
                int ammo[16];
                int fuel[4];

                for (n = 0; n < 16; n++) {
                    Weapon* w = ship->GetWeaponByIndex(n+1);

                    if (w)
                    ammo[n] = w->Ammo();
                    else
                    ammo[n] = -10;
                }

                for (n = 0; n < 4; n++) {
                    if (ship->Reactors().size() > n)
                    fuel[n] = ship->Reactors()[n]->Charge();
                    else
                    fuel[n] = -10;
                }

                s->SetAmmo(ammo);
                s->SetFuel(fuel);

                msn_elem->Ships().append(s);
            }
        }
    }

    return msn_elem;
}

Hangar*
Sim::FindSquadron(const char* name, int& index)
{
    Hangar* hangar = 0;

    ListIter<SimRegion> iter = regions;
    while (++iter && !hangar) {
        SimRegion* rgn = iter.value();

        ListIter<Ship> s_iter = rgn->Carriers();
        while (++s_iter && !hangar) {
            Ship*    carrier = s_iter.value();
            Hangar*  h       = carrier->GetHangar();

            for (int i = 0; i < h->NumSquadrons() && !hangar; i++) {
                if (h->SquadronName(i) == name) {
                    hangar = h;
                    index  = i;
                }
            }
        }
    }

    return hangar;
}

// +===================================================================-+

SimRegion::SimRegion(Sim* s, const char* n, int t)
    : sim(s), name(n), type(t), orbital_region(0), star_system(0), player_ship(0),
      grid(0), active(false), current_view(0), sim_time(0), ai_index(0), terrain(0)
{
    if (sim) {
        star_system = sim->GetStarSystem();
    }
}

SimRegion::SimRegion(Sim* s, OrbitalRegion* r)
    : sim(s), orbital_region(r), type(REAL_SPACE), star_system(0), player_ship(0),
      grid(0), active(false), current_view(0), sim_time(0), ai_index(0), terrain(0)
{
    if (r) {
        star_system = r->System();
    }

    if (orbital_region) {
        name = orbital_region->Name();
        grid = new Grid((int) orbital_region->Radius(),
        (int) orbital_region->GridSpace());


        if (orbital_region->Type() == Orbital::TERRAIN) {
            TerrainRegion* trgn = (TerrainRegion*) orbital_region;
            terrain = new Terrain(trgn);

            type = AIR_SPACE;
        }

        else if (orbital_region->Asteroids() > 0) {
            int asteroids = orbital_region->Asteroids();

            for (int i = 0; i < asteroids; i++) {
                Point init_loc((rand()-16384.0f) * 30,
                (rand()-16384.0f) * 3,
                (rand()-16384.0f) * 30);
                sim->CreateAsteroid(init_loc, i, Random(1e7, 1e8), this);
            }
        }
    }
    else {
        name = ContentBundle::GetInstance()->GetText("Unknown");
    }
}

SimRegion::~SimRegion()
{
    GRAPHIC_DESTROY(grid);
    delete terrain;
    explosions.destroy();
    shots.destroy();
    ships.destroy();
    debris.destroy();
    asteroids.destroy();
    dead_ships.destroy();

    for (int i = 0; i < 5; i++)
    track_database[i].destroy();
}

int
SimRegion::operator < (const SimRegion& r) const
{
    return (orbital_region && r.orbital_region && *orbital_region <  *r.orbital_region);
}

int
SimRegion::operator <= (const SimRegion& r) const
{
    return (orbital_region && r.orbital_region && *orbital_region <= *r.orbital_region);
}

// +--------------------------------------------------------------------+

void
SimRegion::SetPlayerShip(Ship* ship)
{
    // there can only be a player ship when playing the game locally
    if (Starshatter::GetInstance()) {
        int player_index = ships.index(ship);

        if (player_index >= 0) {
            if (sim->GetActiveRegion() != this)
            sim->ActivateRegion(this);

            AttachPlayerShip(player_index);
        }

        else {
            Print("SimRegion %s could not set player ship '%s' - not in region\n",
            name.data(), ship ? ship->Name() : "(null)");
        }
    }

    // if this is a stand-alone server, set player ship to null
    else {
        if (player_ship)
        player_ship->SetControls(0);

        current_view = -1;
        player_ship = 0;
    }
}

void
SimRegion::AttachPlayerShip(int index)
{
    if (player_ship)
    player_ship->SetControls(0);

    current_view = index;
    player_ship  = ships[current_view];

    CameraDirector* cam_dir = CameraDirector::GetInstance();
    if (cam_dir)
    cam_dir->SetShip(player_ship);

    if (sim->dust)
    sim->dust->Reset(player_ship->Location());

    if (!sim->IsTestMode())
    player_ship->SetControls(sim->ctrl);

    MouseController* mouse_con = MouseController::GetInstance();
    if (mouse_con)
    mouse_con->SetActive(false);
}

void
SimRegion::NextView()
{
    if (ships.size()) {
        int original_view = current_view;

        do {
            current_view++;
            if (current_view >= ships.size()) {
                current_view = 0;
            }
        }
        while (ships[current_view]->Life() == 0 && current_view != original_view);

        if (current_view != original_view) {
            ClearSelection();

            if (!sim->IsTestMode())
            player_ship->SetControls(0);

            if (player_ship->Rep())
            player_ship->Rep()->Show();

            AttachPlayerShip(current_view);
        }
    }
}

bool
SimRegion::IsSelected(Ship* s)
{
    return selection.contains(s);
}

ListIter<Ship>
SimRegion::GetSelection()
{
    return selection;
}

void
SimRegion::SetSelection(Ship* newsel)
{
    selection.clear();
    selection.append(newsel);
}

void
SimRegion::ClearSelection()
{
    selection.clear();
}

void
SimRegion::AddSelection(Ship* newsel)
{
    if (!newsel ||
            newsel->GetFlightPhase() <  Ship::ACTIVE ||
            newsel->GetFlightPhase() >= Ship::RECOVERY)
    return;

    if (!selection.contains(newsel))
    selection.append(newsel);
}

// +--------------------------------------------------------------------+

void
SimRegion::Activate()
{
    if (!sim) return;

    ListIter<Ship> ship = ships;
    while (++ship)
    ship->Activate(sim->scene);

    ListIter<Shot> shot = shots;
    while (++shot)
    shot->Activate(sim->scene);

    ListIter<Explosion> exp = explosions;
    while (++exp)
    exp->Activate(sim->scene);

    ListIter<Debris> deb = debris;
    while (++deb)
    deb->Activate(sim->scene);

    ListIter<Asteroid> a = asteroids;
    while (++a)
    a->Activate(sim->scene);

    if (grid)
    sim->scene.AddGraphic(grid);

    if (terrain)
    terrain->Activate(sim->scene);

    player_ship = 0;
    active      = true;
}

// +--------------------------------------------------------------------+

void
SimRegion::Deactivate()
{
    if (!sim) return;

    ListIter<Ship> ship = ships;
    while (++ship)
    ship->Deactivate(sim->scene);

    ListIter<Shot> shot = shots;
    while (++shot)
    shot->Deactivate(sim->scene);

    ListIter<Explosion> exp = explosions;
    while (++exp)
    exp->Deactivate(sim->scene);

    ListIter<Debris> deb = debris;
    while (++deb)
    deb->Deactivate(sim->scene);

    ListIter<Asteroid> a = asteroids;
    while (++a)
    a->Deactivate(sim->scene);

    if (grid)
    sim->scene.DelGraphic(grid);

    if (terrain)
    terrain->Deactivate(sim->scene);

    player_ship = 0;
    active      = false;

    for (int i = 0; i < 5; i++)
    track_database[i].destroy();
}

// +--------------------------------------------------------------------+

void
SimRegion::ExecFrame(double secs)
{
    if (!sim) return;

    double seconds    = secs;

    // DON'T REALLY KNOW WHAT PURPOSE THIS SERVES....
    if (!active) {
        double max_frame  = 3.0 / 5.0;  // Value is based on already removed legacy constants.
        long   new_time   = Clock::GetInstance()->GameTime();
        double delta      = new_time - sim_time;
        seconds    = delta / 1000.0;

        if (seconds > max_frame)
        seconds = max_frame;
    }

    sim_time = Clock::GetInstance()->GameTime();

    if (orbital_region)
    location = orbital_region->Location();

    CameraDirector* cam_dir = CameraDirector::GetInstance();

    Point ref;

    if (active && cam_dir) {
        ref = cam_dir->GetCamera()->Pos();
        UpdateSky(seconds, ref);
    }

    if (terrain)
    terrain->ExecFrame(seconds);

    UpdateTracks(seconds);
    UpdateShips(seconds);
    UpdateShots(seconds);
    UpdateExplosions(seconds);

    if (!Game::GetInstance()->Paused()) {
        DamageShips();
        DockShips();

        if (active) {
            CollideShips();
            CrashShips();
        }

        DestroyShips();
    }

    if (active && cam_dir && player_ship) {
        Sound::SetListener(*(cam_dir->GetCamera()), player_ship->Velocity());
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::ShowGrid(int show)
{
    if (grid) {
        if (show)
        grid->Show();
        else
        grid->Hide();
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::UpdateSky(double seconds, const Point& ref)
{
    Dust* dust = sim->dust;

    if (dust) {
        if (orbital_region && orbital_region->Type() == Orbital::TERRAIN) {
            dust->Hide();
        }
        else {
            dust->Show();

            dust->ExecFrame(seconds, ref);

            if (player_ship && dust->Hidden()) {
                dust->Reset(player_ship->Location());
                dust->Show();
            }
        }
    }

    ListIter<Asteroid> a = asteroids;
    while (++a) {
        a->ExecFrame(seconds);
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::UpdateShips(double seconds)
{
    int ship_index = 0;
    if (ai_index > ships.size())
    ai_index = 0;

    ListIter<Ship> ship_iter = ships;
    Ship* ship = 0;

    while (++ship_iter) {
        ship = ship_iter.value();

        if (ship_index == ai_index || ship == player_ship)
        ship->SetAIMode(2);
        else
        ship->SetAIMode(1);

        ship->ExecFrame(seconds);
        ship_index++;
    }

    ai_index++;
}

// +--------------------------------------------------------------------+

void
SimRegion::UpdateShots(double seconds)
{
    ListIter<Shot> shot_iter = shots;
    while (++shot_iter) {
        Shot* shot = shot_iter.value();
        shot->ExecFrame(seconds);

        if (shot->Design()->flak) {
            SeekerAI* seeker = (SeekerAI*) shot->GetDirector();

            if (shot->Life() < 0.02 || seeker && seeker->Overshot()) {
                shot->SetFuse(0.001); // set lifetime to ~zero
                sim->CreateSplashDamage(shot);
            }
        }

        if (shot->Life() < 0.01) {  // died of old age
            NetUtil::SendWepDestroy(shot);

            if (shot->IsDrone())
            drones.remove((Drone*) shot);

            shot_iter.removeItem();
            delete shot;
            shot = 0;
        }
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::UpdateExplosions(double seconds)
{
    ListIter<Explosion> exp_iter = explosions;
    while (++exp_iter) {
        Explosion* exp = exp_iter.value();
        exp->ExecFrame(seconds);

        if (exp->Life() < 0.01) {  // died of old age
            exp_iter.removeItem();
            delete exp;
        }
    }

    ListIter<Debris> debris_iter = debris;
    while (++debris_iter) {
        Debris* d = debris_iter.value();
        d->ExecFrame(seconds);

        if (d->Life() < 0.01) {  // died of old age
            debris_iter.removeItem();
            delete d;
        }
    }
}

// +--------------------------------------------------------------------+
// Check for collisions between ships and shots, and apply damage.
// Also look for damage to drones and debris.

void
SimRegion::DamageShips()
{
    if (ships.size() == 0 || shots.size() == 0)
    return;

    Point impact;

    // FOR EACH SHOT IN THE REGION:
    ListIter<Shot> shot_iter = shots;
    while (++shot_iter) {
        Shot*       shot  = shot_iter.value();
        const Ship* owner = shot->Owner();
        const char* owner_name;

        if (owner)
        owner_name = owner->Name();
        else
        owner_name = "[KIA]";

        // CHECK FOR COLLISION WITH A SHIP:
        ListIter<Ship> ship_iter = ships;
        while (shot && ++ship_iter) {
            Ship* ship = ship_iter.value();
            int   hit  = ship->HitBy(shot, impact);

            if (hit) {
                // recon imager:
                if (shot->Damage() < 0) {
                    ShipStats* shooter = ShipStats::Find(owner_name);
                    if (shooter) {
                        shooter->AddEvent(SimEvent::SCAN_TARGET, ship->Name());
                    }
                }

                // live round:
                else if (shot->Damage() > 0) {
                    int ship_destroyed = (!ship->InTransition() && ship->Integrity() < 1.0f);

                    // then delete the ship:
                    if (ship_destroyed) {
                        NetUtil::SendObjKill(ship, owner, shot->IsMissile() ? NetObjKill::KILL_SECONDARY : NetObjKill::KILL_PRIMARY);
                        Director* director;

                        Print("    %s Killed %s (%s)\n", owner_name, ship->Name(), FormatGameTime());

                        if (owner)
                            director = owner->GetDirector();

                        // alert the killer
                        if (director && director->Type() > SteerAI::SEEKER && director->Type() < SteerAI::GROUND) {
                            ShipAI* shipAI = (ShipAI*) director;
                            shipAI->Splash(ship);
                        }

                        // record the kill
                        ShipStats* killer = ShipStats::Find(owner_name);
                        if (killer) {
                            if (shot->IsMissile())
                            killer->AddEvent(SimEvent::MISSILE_KILL, ship->Name());
                            else
                            killer->AddEvent(SimEvent::GUNS_KILL, ship->Name());
                        }

                        if (owner && owner->GetIFF() != ship->GetIFF()) {
                            if (ship->GetIFF() > 0 || owner->GetIFF() > 1) {
                                killer->AddPoints(ship->Value());

                                Element* elem = owner->GetElement();
                                if (elem) {
                                    if (owner->GetElementIndex() > 1) {
                                        Ship* s = elem->GetShip(1);

                                        if (s) {
                                            ShipStats* cmdr_stats = ShipStats::Find(s->Name());
                                            if (cmdr_stats) {
                                                cmdr_stats->AddCommandPoints(ship->Value()/2);
                                            }
                                        }
                                    }

                                    Element* cmdr = elem->GetCommander();
                                    if (cmdr) {
                                        Ship* s = cmdr->GetShip(1);

                                        if (s) {
                                            ShipStats* cmdr_stats = ShipStats::Find(s->Name());
                                            if (cmdr_stats) {
                                                cmdr_stats->AddCommandPoints(ship->Value()/2);
                                            }
                                        }
                                    }
                                }
                            }
                        }

                        ShipStats* killee = ShipStats::Find(ship->Name());
                        if (killee)
                        killee->AddEvent(SimEvent::DESTROYED, owner_name);

                        ship->DeathSpiral();
                    }
                }

                // finally, consume the shot:
                if (!shot->IsBeam()) {
                    if (owner) {
                        ShipStats* stats = ShipStats::Find(owner_name);
                        if (shot->Design()->primary)
                        stats->AddGunHit();
                        else if (shot->Damage() > 0)
                        stats->AddMissileHit();
                    }

                    NetUtil::SendWepDestroy(shot);

                    if (shot->IsDrone())
                    drones.remove((Drone*) shot);

                    shot_iter.removeItem();
                    delete shot;
                    shot = 0;
                }
                else if (!shot->HitTarget()) {
                    shot->SetHitTarget(true);

                    if (owner) {
                        ShipStats* stats = ShipStats::Find(owner_name);
                        if (shot->Design()->primary)
                        stats->AddGunHit();
                    }
                }
            }
        }

        // CHECK FOR COLLISION WITH A DRONE:
        if (shot && shot->Design()->target_type & Ship::DRONE) {
            ListIter<Drone> drone_iter = drones;
            while (shot && ++drone_iter) {
                Drone* d = drone_iter.value();

                if (d == shot || d->Owner() == owner)
                continue;

                int hit = d->HitBy(shot, impact);
                if (hit) {
                    int destroyed = (d->Integrity() < 1.0f);

                    // then mark the drone for deletion:
                    if (destroyed) {
                        NetUtil::SendWepDestroy(d);
                        sim->CreateExplosion(d->Location(), d->Velocity(), 21, 1.0f, 1.0f, this);
                        d->SetLife(0);
                    }

                    // finally, consume the shot:
                    if (!shot->IsBeam()) {
                        if (owner) {
                            ShipStats* stats = ShipStats::Find(owner_name);
                            if (shot->Design()->primary)
                            stats->AddGunHit();
                            else
                            stats->AddMissileHit();
                        }

                        NetUtil::SendWepDestroy(shot);

                        if (shot->IsDrone())
                        drones.remove((Drone*) shot);

                        shot_iter.removeItem();
                        delete shot;
                        shot = 0;
                    }
                }
            }
        }

        // CHECK FOR COLLISION WITH DEBRIS:
        ListIter<Debris> debris_iter = debris;
        while (shot && ++debris_iter) {
            Debris* d = debris_iter.value();

            if (d->Radius() < 50)
            continue;

            int hit = d->HitBy(shot, impact);
            if (hit) {
                int destroyed = (d->Integrity() < 1.0f);

                // then delete the debris:
                if (destroyed) {
                    sim->CreateExplosion(d->Location(), d->Velocity(), Explosion::LARGE_EXPLOSION, 1.0f, 1.0f, this);
                    debris_iter.removeItem();
                    delete d;
                }

                // finally, consume the shot:
                if (!shot->IsBeam()) {
                    NetUtil::SendWepDestroy(shot);
                    if (shot->IsDrone())
                    drones.remove((Drone*) shot);

                    shot_iter.removeItem();
                    delete shot;
                    shot = 0;
                }
            }
        }

        // CHECK FOR COLLISION WITH ASTEROIDS:
        ListIter<Asteroid> a_iter = asteroids;
        while (shot && ++a_iter) {
            Asteroid* a = a_iter.value();

            int hit = a->HitBy(shot, impact);
            if (hit) {
                if (!shot->IsBeam()) {
                    if (shot->IsDrone())
                    drones.remove((Drone*) shot);

                    shot_iter.removeItem();
                    delete shot;
                    shot = 0;
                }
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::CollideShips()
{
    if (ships.size() < 2 && debris.size() < 1)
    return;

    List<Ship> kill_list;

    int s_index = 0;

    ListIter<Ship> ship_iter = ships;
    while (++ship_iter) {
        Ship* ship = ship_iter.value();

        if (ship->InTransition()                  ||
                ship->GetFlightPhase() < Ship::ACTIVE ||
                ship->MissionClock() < 10000          ||
                ship->IsNetObserver())
        continue;

        int t_index = 0;
        ListIter<Ship> targ_iter = ships;
        while (++targ_iter) {
            Ship* targ = targ_iter.value();

            if (t_index++ <= s_index) continue;

            if (targ == ship) continue;

            if (targ->InTransition()                  ||
                    targ->GetFlightPhase() < Ship::ACTIVE ||
                    targ->MissionClock() < 10000          ||
                    targ->IsNetObserver())
            continue;

            // ignore AI fighter collisions:
            if (ship->IsDropship()     &&
                    ship != player_ship    &&
                    targ->IsDropship()     &&
                    targ != player_ship)
            continue;

            // don't collide with own runway!
            if (ship->IsAirborne() && ship->GetCarrier() == targ)
            continue;
            if (targ->IsAirborne() && targ->GetCarrier() == ship)
            continue;

            // impact:
            if (ship->CollidesWith(*targ)) {
                Vec3 tv1 = targ->Velocity();
                Vec3 sv1 = ship->Velocity();

                Physical::SemiElasticCollision(*ship, *targ);

                Vec3 tv2 = targ->Velocity();
                Vec3 sv2 = ship->Velocity();

                double dvs = (sv2-sv1).length();
                double dvt = (tv2-tv1).length();

                if (dvs > 20) dvs *= dvs;
                if (dvt > 20) dvt *= dvt;

                if (!NetGame::IsNetGameClient()) {
                    double old_integrity = ship->Integrity();
                    ship->InflictDamage(dvs);
                    double hull_damage = old_integrity - ship->Integrity();
                    NetUtil::SendObjDamage(ship, hull_damage);

                    old_integrity = targ->Integrity();
                    targ->InflictDamage(dvt);
                    hull_damage = old_integrity - targ->Integrity();
                    NetUtil::SendObjDamage(targ, hull_damage);
                }

                // then delete the ship:
                if (targ->Integrity() < 1.0f) {
                    NetUtil::SendObjKill(targ, ship, NetObjKill::KILL_COLLISION);
                    Print("   ship %s died in collision with %s (%s)\n", targ->Name(), ship->Name(), FormatGameTime());
                    if (!kill_list.contains(targ)) {
                        ShipStats* r = ShipStats::Find(targ->Name());
                        if (r) r->AddEvent(SimEvent::COLLIDE, ship->Name());

                        if (targ->GetIFF() > 0 && ship->GetIFF() != targ->GetIFF()) {
                            r = ShipStats::Find(ship->Name());
                            if (r) r->AddPoints(targ->Value());
                        }

                        kill_list.insert(targ);
                    }
                }

                if (ship->Integrity() < 1.0f) {
                    NetUtil::SendObjKill(ship, targ, NetObjKill::KILL_COLLISION);
                    Print("   ship %s died in collision with %s (%s)\n", ship->Name(), targ->Name(), FormatGameTime());
                    if (!kill_list.contains(ship)) {
                        ShipStats* r = ShipStats::Find(ship->Name());
                        if (r) r->AddEvent(SimEvent::COLLIDE, targ->Name());

                        if (ship->GetIFF() > 0 && ship->GetIFF() != targ->GetIFF()) {
                            r = ShipStats::Find(targ->Name());
                            if (r) r->AddPoints(ship->Value());
                        }

                        kill_list.insert(ship);
                    }
                }
            }
        }

        ListIter<Debris> debris_iter = debris;
        while (++debris_iter) {
            Debris* d = debris_iter.value();

            if (d->Radius() < 50)
            continue;

            if (ship->CollidesWith(*d)) {
                Vec3 tv1 = d->Velocity();
                Vec3 sv1 = ship->Velocity();

                Physical::SemiElasticCollision(*ship, *d);

                Vec3 tv2 = d->Velocity();
                Vec3 sv2 = ship->Velocity();

                if (!NetGame::IsNetGameClient()) {
                    ship->InflictDamage((sv2-sv1).length());
                }

                d->InflictDamage((tv2-tv1).length());

                // then delete the debris:
                if (d->Integrity() < 1.0f) {
                    sim->CreateExplosion(d->Location(), d->Velocity(), Explosion::LARGE_EXPLOSION, 1.0f, 1.0f, this);
                    debris_iter.removeItem();
                    delete d;
                }

                if (ship->Integrity() < 1.0f) {
                    if (!kill_list.contains(ship)) {
                        ShipStats* r = ShipStats::Find(ship->Name());
                        if (r) r->AddEvent(SimEvent::COLLIDE, ContentBundle::GetInstance()->GetText("DEBRIS"));

                        kill_list.insert(ship);
                    }
                }
            }
        }

        ListIter<Asteroid> a_iter = asteroids;
        while (++a_iter) {
            Asteroid* a = a_iter.value();

            if (ship->CollidesWith(*a)) {
                Vec3 sv1 = ship->Velocity();
                Physical::SemiElasticCollision(*ship, *a);
                Vec3 sv2 = ship->Velocity();

                if (!NetGame::IsNetGameClient()) {
                    ship->InflictDamage((sv2-sv1).length() * 10);
                }

                if (ship->Integrity() < 1.0f) {
                    if (!kill_list.contains(ship)) {
                        ShipStats* r = ShipStats::Find(ship->Name());
                        if (r) r->AddEvent(SimEvent::COLLIDE, ContentBundle::GetInstance()->GetText("ASTEROID"));

                        kill_list.insert(ship);
                    }
                }
            }
        }

        s_index++;
    }

    ListIter<Ship> killed(kill_list);
    while (++killed) {
        Ship* kill = killed.value();
        kill->DeathSpiral();
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::CrashShips()
{
    if (type != AIR_SPACE || NetGame::IsNetGameClient())
    return;

    ListIter<Ship> ship_iter = ships;
    while (++ship_iter) {
        Ship* ship = ship_iter.value();

        if (!ship->IsGroundUnit() &&
                !ship->InTransition() &&
                ship->Class() != Ship::LCA &&
                ship->AltitudeAGL() < ship->Radius()/2) {
            if (ship->GetFlightPhase() == Ship::ACTIVE || ship->GetFlightPhase() == Ship::APPROACH) {
                ship->InflictDamage(1e6);

                if (ship->Integrity() < 1.0f) {
                    Print("    ship destroyed by crash: %s (%s)\n", ship->Name(), FormatGameTime());
                    ShipStats* r = ShipStats::Find(ship->Name());
                    if (r) r->AddEvent(SimEvent::CRASH);

                    ship->DeathSpiral();
                }
            }
        }
    }

    ListIter<Shot> shot_iter = shots;
    while (++shot_iter) {
        Shot* shot = shot_iter.value();

        if (shot->IsBeam() || shot->IsDecoy())
        continue;

        if (shot->AltitudeMSL() < 5e3 &&
                shot->AltitudeAGL() < 5) {

            // shot hit the ground, destroy it:
            NetUtil::SendWepDestroy(shot);

            if (shot->IsDrone())
            drones.remove((Drone*) shot);

            shot_iter.removeItem();
            delete shot;
        }
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::DestroyShips()
{
    ListIter<Ship> ship_iter = ships;
    while (++ship_iter) {
        Ship*    ship = ship_iter.value();

        if (ship->IsDead()) {
            // must use the iterator to remove the current
            // item from the container:
            ship_iter.removeItem();
            DestroyShip(ship);
        }
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::DestroyShip(Ship* ship)
{
    if (!ship) return;

    Ship*    spawn = 0;

    ships.remove(ship);
    carriers.remove(ship);
    selection.remove(ship);

    Text rgn_name;
    if (ship->GetRegion())
    rgn_name = ship->GetRegion()->Name();

    bool player_destroyed = (player_ship == ship);

    char        ship_name[64];
    char        ship_reg[64];
    strcpy_s(ship_name, ship->Name());
    strcpy_s(ship_reg,  ship->Registry());

    ShipDesign* ship_design = (ShipDesign*) ship->Design();
    int         ship_iff    = ship->GetIFF();
    int         cmd_ai      = ship->GetCommandAILevel();
    bool        respawn     = sim->IsTestMode() && !ship->IsGroundUnit();
    bool        observe     = false;

    if (!respawn)
    respawn = ship->RespawnCount() > 0;

    if (sim->netgame) {
        if (!respawn)
        observe = player_destroyed;
    }

    if (respawn || observe) {
        if (!sim->netgame || !respawn)
        ship->SetRespawnLoc(RandomPoint() * 2);

        Point spawn_loc = ship->RespawnLoc();

        if (ship->IsAirborne() && spawn_loc.z < 5e3)
        spawn_loc.z = Random(8e3, 10e3);

        spawn = sim->CreateShip(ship_name, ship_reg, ship_design, rgn_name, spawn_loc, ship_iff, cmd_ai, observe ? 0 : ship->GetLoadout());
        spawn->SetRespawnCount(ship->RespawnCount() - 1);
        spawn->SetNetObserver(observe);

        if (sim->netgame && respawn)
        sim->netgame->Respawn(ship->GetObjID(), spawn);

        int n = strlen(ship_name);
        if (n > 2) {
            if (ship_name[n-2] == ' ' && isdigit(ship_name[n-1]))
                ship_name[n-2] = 0;
        }

        Element* elem = sim->FindElement(ship_name);
        if (elem)
        elem->AddShip(spawn, ship->GetOrigElementIndex());
        else
        Print("Warning: No Element found for '%s' on respawn.\n", ship_name);

        if (player_destroyed)
        SetPlayerShip(spawn);
    }
    else {
        // close mission, return to menu:
        if (player_destroyed) {
            Starshatter* stars = Starshatter::GetInstance();
            if (stars)
            stars->SetGameMode(Game::PLAN_MODE);
        }
    }

    sim->ProcessEventTrigger(MissionEvent::TRIGGER_DESTROYED, 0, ship->Name());

    dead_ships.insert(ship);
    ship->Destroy();
}

// +--------------------------------------------------------------------+

void
SimRegion::NetDockShip(Ship* ship, Ship* carrier, FlightDeck* deck)
{
    if (!ship || !carrier || !deck) return;

    deck->Dock(ship);
}

// +--------------------------------------------------------------------+

Ship*
SimRegion::FindShip(const char* ship_name)
{
    Ship* ship = 0;

    if (ship_name && *ship_name) {
        int   name_len = strlen(ship_name);

        ListIter<Ship> ship_iter = ships;
        while (++ship_iter && !ship) {
            Ship* test = ship_iter.value();
            if (!strncmp(test->Name(), ship_name, name_len)) {
                int test_len = strlen(test->Name());

                // The only fuzzy match is for element indices.
                // The desired name "Alpha" matches "Alpha 1" and "Alpha 2"
                // but not "Alpha-Centauri"

                if (test_len > name_len && test->Name()[name_len] != ' ')
                continue;

                ship = test;
            }
        }
    }

    return ship;
}

Ship*
SimRegion::FindShipByObjID(std::uint32_t objid)
{
    Ship* ship = 0;

    ListIter<Ship> ship_iter = ships;
    while (++ship_iter && !ship) {
        Ship* test = ship_iter.value();
        if (test->GetObjID() == objid)
        ship = test;
    }

    return ship;
}

Shot*
SimRegion::FindShotByObjID(std::uint32_t objid)
{
    Shot* shot = 0;

    ListIter<Shot> shot_iter = shots;
    while (++shot_iter && !shot) {
        Shot* test = shot_iter.value();
        if (test->GetObjID() == objid)
        shot = test;
    }

    if (!shot) {
        ListIter<Drone> drone_iter = drones;
        while (++drone_iter && !shot) {
            Drone* test = drone_iter.value();
            if (test->GetObjID() == objid)
            shot = test;
        }
    }

    return shot;
}

// +--------------------------------------------------------------------+

void
SimRegion::DockShips()
{
    if (ships.size() == 0)
    return;

    ListIter<Ship> ship_iter = ships;
    while (++ship_iter) {
        Ship* ship   = ship_iter.value();
        int   docked = (ship->GetFlightPhase() == Ship::DOCKED);

        if (docked) {
            sim->ProcessEventTrigger(MissionEvent::TRIGGER_DOCK, 0, ship->Name());

            // who did this ship dock with?
            Ship* carrier = ship->GetCarrier();

            if (carrier) {
                ShipStats* s = ShipStats::Find(ship->Name());
                if (s) {
                    if (ship->IsAirborne())
                    s->AddEvent(SimEvent::LAND, carrier->Name());
                    else
                    s->AddEvent(SimEvent::DOCK, carrier->Name());
                }

                ShipStats* c = ShipStats::Find(carrier->Name());
                if (c) c->AddEvent(SimEvent::RECOVER_SHIP, ship->Name());
            }

            // then delete the ship:
            int  player_docked = (player_ship == ship);
            char ship_name[33];
            strcpy_s(ship_name, ship->Name());

            selection.remove(ship);
            dead_ships.insert(ship_iter.removeItem());
            ship->Destroy();

            if (player_docked) {
                // close mission, return to menu:
                Starshatter* stars = Starshatter::GetInstance();
                if (stars)
                stars->SetGameMode(Game::PLAN_MODE);
            }

            if (carrier)
            Print("    %s Docked with %s\n", ship_name, carrier->Name());
        }
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::InsertObject(Ship* ship)
{
    if (!ship) return;

    SimRegion* orig = ship->GetRegion();

    if (orig != this) {
        if (orig != 0) {
            if (orig->active)
            ship->Deactivate(sim->scene);

            orig->ships.remove(ship);
            orig->carriers.remove(ship);
            orig->selection.remove(ship);
        }

        ships.append(ship);

        if (ship->NumFlightDecks())
        carriers.append(ship);

        TranslateObject(ship);
        ship->SetRegion(this);

        if (active)
        ship->Activate(sim->scene);
    }
}

void
SimRegion::InsertObject(Shot* shot)
{
    if (!shot) return;

    SimRegion* orig = shot->GetRegion();

    if (orig != this) {
        if (orig != 0)
        orig->shots.remove(shot);

        shots.append(shot);
        if (shot->IsDrone())
        drones.append((Drone*) shot);

        TranslateObject(shot);
        shot->SetRegion(this);

        if (active)
        shot->Activate(sim->scene);
    }
}

void
SimRegion::InsertObject(Explosion* exp)
{
    if (!exp) return;

    SimRegion* orig = exp->GetRegion();

    if (orig != this) {
        if (orig != 0)
        orig->explosions.remove(exp);

        explosions.append(exp);
        TranslateObject(exp);
        exp->SetRegion(this);

        if (active)
        exp->Activate(sim->scene);
    }
}

void
SimRegion::InsertObject(Debris* d)
{
    if (!d) return;

    SimRegion* orig = d->GetRegion();

    if (orig != this) {
        if (orig != 0)
        orig->debris.remove(d);

        debris.append(d);
        TranslateObject(d);
        d->SetRegion(this);

        if (active)
        d->Activate(sim->scene);
    }
}

void
SimRegion::InsertObject(Asteroid* a)
{
    if (!a) return;

    SimRegion* orig = a->GetRegion();

    if (orig != this) {
        if (orig != 0)
        orig->asteroids.remove(a);

        asteroids.append(a);
        TranslateObject(a);
        a->SetRegion(this);

        if (active)
        a->Activate(sim->scene);
    }
}

// +--------------------------------------------------------------------+

void
SimRegion::TranslateObject(SimObject* object)
{
    if (orbital_region)
    location = orbital_region->Location();

    if (object) {
        SimRegion* orig = object->GetRegion();
        if (orig) {
            Point delta = Location() - orig->Location();
            delta = delta.OtherHand();
            object->TranslateBy(delta);
        }
    }
}

// +--------------------------------------------------------------------+

List<Contact>&
SimRegion::TrackList(int iff)
{
    if (iff >= 0 && iff < 5)
    return track_database[iff];

    static List<Contact> empty;
    return empty;
}

void
SimRegion::UpdateTracks(double seconds)
{
    for (int i = 0; i < 5; i++) {
        ListIter<Contact> track_iter = track_database[i];

        while (++track_iter) {
            Contact* t        = track_iter.value();
            Ship*    c_ship   = t->GetShip();
            Shot*    c_shot   = t->GetShot();
            double   c_life   = 0;

            if (c_ship) {
                c_life = c_ship->Life();

                // look for quantum jumps and orbit transitions:
                if (c_ship->GetRegion() != this || c_ship->IsNetObserver())
                c_life = 0;
            }

            else if (c_shot)
            c_life = c_shot->Life();

            if (t->Age() < 0 || c_life == 0) {
                track_iter.removeItem();
                delete t;
            }

            else {
                t->Reset();
            }
        }
    }
}

// +--------------------------------------------------------------------+

bool
SimRegion::CanTimeSkip() const
{
    bool ok = false;

    if (player_ship) {
        ok = true;

        for (int i = 0; ok && i < ships.size(); i++) {
            Ship* s = ships[i];

            if (s != player_ship && s->GetIFF() && s->GetIFF() != player_ship->GetIFF()) {
                double dist = Point(s->Location() - player_ship->Location()).length();

                if (s->IsStarship())
                ok = dist > 60e3;
                else
                ok = dist > 30e3;
            }
        }
    }

    return ok;
}

// +--------------------------------------------------------------------+

void
SimRegion::ResolveTimeSkip(double seconds)
{
    for (int i = 0; i < ships.size(); i++) {
        Ship* ship = ships[i];
        Ship* ward = ship->GetWard();

        // remember to burn fuel and fix stuff...
        ship->ExecSystems(seconds);
        ship->ExecMaintFrame(seconds);

        ship->ClearTrack();
        ListIter<Contact> contact = ship->ContactList();
        while (++contact)
        contact->ClearTrack();

        if (ship->IsStatic())
        continue;

        // if ship is cleared inbound, land him:
        InboundSlot* inbound = ship->GetInbound();
        if (inbound) {
            if (inbound->Cleared()) {
                FlightDeck* deck = inbound->GetDeck();

                if (deck) {
                    ship->SetCarrier((Ship*) deck->GetCarrier(), deck);
                    ship->SetFlightPhase(Ship::DOCKED);
                    ship->Stow();
                    deck->Clear(inbound->Index());
                }
            }

            // cleared or not, once you're inbound, don't seek navpoints:
            continue;
        }

        if (ship->GetHangar()) {
            ship->GetHangar()->ExecFrame(seconds);

            List<FlightDeck>& flight_decks = ship->FlightDecks();
            for (int n = 0; n < flight_decks.size(); n++)
            flight_decks[n]->ExecFrame(seconds);
        }

        Instruction* navpt = ship->GetNextNavPoint();
        Point        dest  = ship->Location();
        double       speed = 500;
        double       space = 2.0e3 * (ship->GetElementIndex() - 1);

        if (ship->IsStarship())
        space *= 5;

        if (navpt && navpt->Action() == Instruction::LAUNCH) {
            ship->SetNavptStatus(navpt, Instruction::COMPLETE);
            navpt = ship->GetNextNavPoint();
        }

        if (navpt) {
            dest  = navpt->Location().OtherHand();
            speed = navpt->Speed();
        }

        else if (ward) {
            Point delta = ship->Location() - ward->Location();
            delta.y = 0;

            if (delta.length() > 25e3) {
                delta.Normalize();
                dest = ward->Location() + delta * 25e3;
            }
        }

        Point    delta = dest - ship->Location();
        Point    unit  = delta;
        double   dist  = unit.Normalize() - space;

        if (dist > 1e3) {
            if (speed < 50)
            speed = 500;

            double etr = dist / speed;

            if (etr > seconds)
            etr = seconds;

            Point trans = unit * (speed * etr);

            if (ship->GetFuelLevel() > 1) {
                ship->MoveTo(ship->Location() + trans);
                ship->SetVelocity(unit * speed);
            }
            ship->LookAt(dest);

            if (ship->IsStarship()) {
                ship->SetFLCSMode(Ship::FLCS_HELM);
                ship->SetHelmHeading(ship->CompassHeading());
                ship->SetHelmPitch(ship->CompassPitch());
            }
        }

        else if (navpt && navpt->Status() <= Instruction::ACTIVE) {
            ship->SetNavptStatus(navpt, Instruction::COMPLETE);
        }

        if (ward) {
            Point ward_heading = ward->Heading();
            ward_heading.y = 0;
            ward_heading.Normalize();

            if (ship->GetFuelLevel() > 1) {
                ship->SetVelocity(ward->Velocity());
            }
            ship->LookAt(ship->Location() + ward_heading * 1e6);

            if (ship->IsStarship()) {
                ship->SetFLCSMode(Ship::FLCS_HELM);
                ship->SetHelmHeading(ship->CompassHeading());
                ship->SetHelmPitch(ship->CompassPitch());
            }
        }

        if (dist > 1 || ward) {
            for (int j = 0; j < ships.size(); j++) {
                Ship* test = ships[j];

                if (ship != test && test->Mass() >= ship->Mass()) {
                    Point delta = ship->Location() - test->Location();

                    if (delta.length() < ship->Radius() * 2 + test->Radius() * 2) {
                        ship->MoveTo(test->Location() + RandomPoint().OtherHand());
                    }
                }
            }
        }
    }

    DockShips();
}

// +--------------------------------------------------------------------+

void
SimRegion::CommitMission()
{
    for (int i = 0; i < dead_ships.size(); i++) {
        Ship* s = dead_ships[i];

        if (s->GetCombatUnit() && s->GetFlightPhase() != Ship::DOCKED)
        s->GetCombatUnit()->Kill(1);
    }

    for (int i = 0; i < ships.size(); i++) {
        Ship*       s = ships[i];
        CombatUnit* u = s->GetCombatUnit();

        if (u) {
            Point u_loc = s->Location().OtherHand();
            if (u_loc.z > 20e3)
            u_loc.z = 20e3;
            else if (u_loc.z < -20e3)
            u_loc.z = -20e3;

            if (u->IsStarship()) {
                u->SetRegion(s->GetRegion()->Name());
                u->MoveTo(u_loc);
            }

            if (!u->IsDropship()) {
                if (s->Integrity() < 1)
                u->Kill(1);
                else
                u->SetSustainedDamage(s->Design()->integrity - s->Integrity());
            }

            CombatGroup* g = u->GetCombatGroup();
            if (g && g->Type() > CombatGroup::FLEET && g->GetFirstUnit() == u) {
                if (!g->IsZoneLocked())
                g->SetRegion(s->GetRegion()->Name());
                else
                u->SetRegion(g->GetRegion());

                g->MoveTo(u_loc);
            }
        }
    }
}

// +--------------------------------------------------------------------+

const char* FormatGameTime()
{
    static char txt[64];

    int t = Clock::GetInstance()->GameTime();

    int h = ( t                        / 3600000);
    int m = ((t - h*3600000)           /   60000);
    int s = ((t - h*3600000 - m*60000) /    1000);
    int e = ( t - h*3600000 - m*60000 - s*1000);

    if (h > 0)
    sprintf_s(txt, "%02d:%02d:%02d.%03d", h,m,s,e);
    else
    sprintf_s(txt, "%02d:%02d.%03d", m,s,e);

    return txt;
}