SCR_AmbientVehicleSystem.c

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void OnAmbientVehicleSpawnedDelegate(SCR_AmbientVehicleSpawnPointComponent spawnpoint, Vehicle vehicle);
 
typedef func OnAmbientVehicleSpawnedDelegate;
 
typedef ScriptInvokerBase<OnAmbientVehicleSpawnedDelegate> OnAmbientVehicleSpawnedInvoker;
 
//------------------------------------------------------------------------------------------------
class SCR_AmbientVehicleSystem : GameSystem
{
    protected static const int CHECK_INTERVAL = 3;                  //s, how often should an individual spawnpoint be checked
    protected static const int DESPAWN_TIMEOUT = 10000;             //ms
    protected static const int PARKED_THRESHOLD = 5;                //m, how far away can the spawned vehicle moved before being considered used
 
    protected static const int SPAWN_RADIUS_MIN_SQ = 500 * 500;     // Square value for distance checks
    protected static const int SPAWN_RADIUS_MAX_SQ = 1000 * 1000;   // Square value for distance checks
    protected static const int DESPAWN_RADIUS_DIFF_SQ = 200 * 200;  // Square value for distance checks
 
    protected ref array<SCR_AmbientVehicleSpawnPointComponent> m_aSpawnpoints = {};
    protected ref array<IEntity> m_aPlayers = {};
 
    protected ref OnAmbientVehicleSpawnedInvoker m_OnVehicleSpawned;
 
    protected int m_iLastAssignedIndex;
    protected int m_iIndexToCheck;
    protected int m_iSpawnDistanceSq;
    protected int m_iDespawnDistanceSq;
 
    protected float m_fTimer;
    protected float m_fCheckInterval;
 
    //------------------------------------------------------------------------------------------------
    override event protected void OnInit()
    {
        // No need to run updates unless some spawnpoints are actually registered
        if (m_aSpawnpoints.IsEmpty())
            Enable(false);
 
        RefreshPlayerList();
 
        // Calculate (de)spawn distance based on view distance, have it squared for faster distance calculation
        int fractionVD = GetGame().GetViewDistance() * 0.3;
        m_iSpawnDistanceSq = fractionVD * fractionVD;
        m_iSpawnDistanceSq = Math.Min(SPAWN_RADIUS_MAX_SQ, m_iSpawnDistanceSq);
        m_iSpawnDistanceSq = Math.Max(SPAWN_RADIUS_MIN_SQ, m_iSpawnDistanceSq);
        m_iDespawnDistanceSq = m_iSpawnDistanceSq + DESPAWN_RADIUS_DIFF_SQ;
 
        SCR_BaseGameMode gameMode = SCR_BaseGameMode.Cast(GetGame().GetGameMode());
 
        if (!gameMode)
            return;
 
        gameMode.GetOnPlayerSpawned().Insert(OnPlayerSpawnedOrDeleted);
        gameMode.GetOnPlayerKilled().Insert(OnPlayerKilled);
        gameMode.GetOnPlayerDeleted().Insert(OnPlayerSpawnedOrDeleted);
        gameMode.GetOnPlayerDisconnected().Insert(OnPlayerDisconnected);
    }
 
    //------------------------------------------------------------------------------------------------
    override event protected void OnCleanup()
    {
        SCR_BaseGameMode gameMode = SCR_BaseGameMode.Cast(GetGame().GetGameMode());
 
        if (!gameMode)
            return;
 
        gameMode.GetOnPlayerSpawned().Remove(OnPlayerSpawnedOrDeleted);
        gameMode.GetOnPlayerKilled().Remove(OnPlayerKilled);
        gameMode.GetOnPlayerDeleted().Remove(OnPlayerSpawnedOrDeleted);
        gameMode.GetOnPlayerDisconnected().Remove(OnPlayerDisconnected);
    }
 
    //------------------------------------------------------------------------------------------------
    override event protected void OnUpdate(ESystemPoint point)
    {
        if (!GetGame().AreGameFlagsSet(EGameFlags.SpawnVehicles))
        {
            Enable(false);
            return;
        }
 
        float timeSlice = GetWorld().GetFixedTimeSlice();
 
        m_fTimer += timeSlice;
 
        if (m_fTimer < m_fCheckInterval)
            return;
 
        m_fTimer = 0;
 
        ProcessSpawnpoint(m_iIndexToCheck);
        m_iIndexToCheck++;
 
        if (!m_aSpawnpoints.IsIndexValid(m_iIndexToCheck))
            m_iIndexToCheck = 0;
    }
 
    //------------------------------------------------------------------------------------------------
    override event bool ShouldBePaused()
    {
        return true;
    }
 
    //------------------------------------------------------------------------------------------------
    static SCR_AmbientVehicleSystem GetInstance()
    {
        World world = GetGame().GetWorld();
 
        if (!world)
            return null;
 
        return SCR_AmbientVehicleSystem.Cast(world.FindSystem(SCR_AmbientVehicleSystem));
    }
 
    //------------------------------------------------------------------------------------------------
    OnAmbientVehicleSpawnedInvoker GetOnVehicleSpawned()
    {
        if (!m_OnVehicleSpawned)
            m_OnVehicleSpawned = new OnAmbientVehicleSpawnedInvoker();
 
        return m_OnVehicleSpawned;
    }
 
    //------------------------------------------------------------------------------------------------
    protected void UpdateCheckInterval()
    {
        m_fCheckInterval = CHECK_INTERVAL / m_aSpawnpoints.Count();
    }
 
    //------------------------------------------------------------------------------------------------
    protected void RefreshPlayerList()
    {
        m_aPlayers.Clear();
        array<int> playerIds = {};
        PlayerManager pc = GetGame().GetPlayerManager();
        int playersCount = pc.GetPlayers(playerIds);
 
        foreach (int playerId : playerIds)
        {
            IEntity player = pc.GetPlayerControlledEntity(playerId);
 
            if (!player)
                continue;
 
            CharacterControllerComponent comp = CharacterControllerComponent.Cast(player.FindComponent(CharacterControllerComponent));
 
            if (!comp || comp.IsDead())
                continue;
 
            m_aPlayers.Insert(player);
        }
    }
 
    //------------------------------------------------------------------------------------------------
    protected void OnPlayerSpawnedOrDeleted(int playerId, IEntity player)
    {
        RefreshPlayerList();
    }
 
    //------------------------------------------------------------------------------------------------
    protected void ProcessSpawnpoint(int spawnpointIndex)
    {
        SCR_AmbientVehicleSpawnPointComponent spawnpoint = m_aSpawnpoints[spawnpointIndex];
 
        if (!spawnpoint || spawnpoint.GetIsDepleted())
            return;
 
        Vehicle spawnedVeh = spawnpoint.GetSpawnedVehicle();
        ChimeraWorld world = GetWorld();
        WorldTimestamp currentTime = world.GetServerTimestamp();
        int respawnPeriod = spawnpoint.GetRespawnPeriod();
        
        // Non-respawning vehicle has beed deleted by other means
        // Ignore this spawnpoint from now on
        if (!spawnedVeh && spawnpoint.GetIsSpawnProcessed() && respawnPeriod <= 0)
        {
            spawnpoint.SetIsDepleted(true);
            return;
        }
 
        if (!spawnedVeh)
        {
            WorldTimestamp respawnTimestamp = spawnpoint.GetRespawnTimestamp();
 
            // Respawn timer is ticking
            if (respawnTimestamp.Greater(currentTime))
                return;
 
            if (spawnpoint.GetIsFirstSpawnDone())
            {
                // Vehicle has been deleted, setup respawn timer if enabled
                if (respawnTimestamp == 0 && respawnPeriod > 0)
                {
                    spawnpoint.SetRespawnTimestamp(currentTime.PlusSeconds(respawnPeriod));
                    return;
                }
            }
        }
 
        vector location = spawnpoint.GetOwner().GetOrigin();
 
        // Only handle vehicles which are still on their spawnpoints
        if (spawnedVeh && vector.DistanceXZ(spawnedVeh.GetOrigin(), location) > PARKED_THRESHOLD)
        {
            // Non-respawning spawnpoints get depleted once the vehicle leaves the spawnpoint
            if (spawnpoint.GetRespawnPeriod() <= 0)
                spawnpoint.SetIsDepleted(true);
 
            return;
        }
 
        bool playersNear = false;
        bool playersFar = true;
        int distance;
 
        // Define if any player is close enough to spawn or if all players are far enough to despawn
        foreach (IEntity player : m_aPlayers)
        {
            if (!player)
                continue;
 
            distance = vector.DistanceSq(player.GetOrigin(), location);
 
            if (distance < m_iDespawnDistanceSq)
            {
                playersFar = false;
 
                if (distance < m_iSpawnDistanceSq)
                {
                    playersNear = true;
                    break;
                }
            }
        }
 
        if (!spawnedVeh && playersNear)
        {
            Vehicle vehicle = spawnpoint.SpawnVehicle();
 
            if (vehicle && m_OnVehicleSpawned)
                m_OnVehicleSpawned.Invoke(spawnpoint, vehicle);
 
            return;
        }
 
        // Delay is used so dying players don't see the despawn happen
        if (spawnedVeh && playersFar)
        {
            WorldTimestamp despawnT = spawnpoint.GetDespawnTimer();
 
            if (despawnT == 0)
                spawnpoint.SetDespawnTimer(currentTime.PlusMilliseconds(DESPAWN_TIMEOUT));
            else if (currentTime.Greater(despawnT))
                spawnpoint.DespawnVehicle();
        }
        else
        {
            spawnpoint.SetDespawnTimer(null);
        }
    }
 
    //------------------------------------------------------------------------------------------------
    void RegisterSpawnpoint(notnull SCR_AmbientVehicleSpawnPointComponent spawnpoint)
    {
        if (!IsEnabled())
            Enable(true);
 
        m_aSpawnpoints.Insert(spawnpoint);
        spawnpoint.SetID(m_iLastAssignedIndex);
        m_iLastAssignedIndex++;
        UpdateCheckInterval();
    }
 
    //------------------------------------------------------------------------------------------------
    void UnregisterSpawnpoint(notnull SCR_AmbientVehicleSpawnPointComponent spawnpoint)
    {
        m_aSpawnpoints.RemoveItem(spawnpoint);
        m_iIndexToCheck = 0;
 
        if (!m_aSpawnpoints.IsEmpty())
        {
            UpdateCheckInterval();
            return;
        }
 
        Enable(false);
    }
 
    //------------------------------------------------------------------------------------------------
    int GetSpawnpoints(out array<SCR_AmbientVehicleSpawnPointComponent> spawnpoints)
    {
        if (spawnpoints)
            return spawnpoints.Copy(m_aSpawnpoints);
        else
            return m_aSpawnpoints.Count();
    }
 
    //------------------------------------------------------------------------------------------------
    void OnPlayerDisconnected(int playerId, KickCauseCode cause = KickCauseCode.NONE, int timeout = -1)
    {
        RefreshPlayerList();
    }
 
    //------------------------------------------------------------------------------------------------
    void OnPlayerKilled(int playerId, IEntity playerEntity, IEntity killerEntity, notnull Instigator killer)
    {
        RefreshPlayerList();
    }
}