FactoryCraft-Server/FactoryCraft/Game.cpp

#include "Game.h"

#include "AddEntityUpdate.h"
#include "AsynchronCall.h"
#include "Entity.h"
#include "EntityRemovedUpdate.h"
#include "NetworkMessage.h"
#include "NoBlock.h"
#include "OverworldDimension.h"
#include "Player.h"
#include "Zeit.h"

using namespace Framework;

char* randomKey(int& len)
{
    len = 1024 + (int)(((double)rand() / RAND_MAX - 0.5) * 512);
    char* key = new char[len];
    for (int i = 0; i < len; i++)
        key[i] = (char)((((double)rand() / RAND_MAX) * 254) + 1);
    return key;
}

GameClient::GameClient(Player* zPlayer, FCKlient* client)
    : Thread(),
      zPlayer(zPlayer),
      client(client),
      viewDistance(DEFAULT_VIEW_DISTANCE),
      first(1),
      online(1),
      finished(0),
      backgroundFinished(0),
      foregroundFinished(0)
{
    new AsynchronCall("Game Client Updates", [this]() {
        while (online)
        {
            other.lock();
            if (updateQueue.hat(0))
            {
                WorldUpdate* update = updateQueue.get(0);
                updateQueue.remove(0);
                other.unlock();
                background.lock();
                this->client->zBackgroundWriter()->schreibe(
                    (char*)&Message::WORLD_UPDATE, 1);
                update->writeAndCheck(this->client->zBackgroundWriter());
                background.unlock();
                update->release();
            }
            else
            {
                other.unlock();
                updateSync.wait();
            }
        }
        finished = 1;
    });
    start();
}

GameClient::~GameClient()
{
    online = 0;
    updateSync.notify();
    emptyForegroundQueueSync.notifyAll();
    emptyBackgroundQueueSync.notifyAll();
    foregroundQueueSync.notify();
    backgroundQueueSync.notify();
    while (!finished || !foregroundFinished || !backgroundFinished)
        Sleep(100);
    client->release();
}

void GameClient::thread()
{
    new AsynchronCall("Game Client Background", [this]() {
        while (online)
        {
            queueCs.lock();
            if (backgroundQueue.hat(0))
            {
                NetworkMessage* message = backgroundQueue.get(0);
                backgroundQueue.remove(0);
                queueCs.unlock();
                background.lock();
                message->writeTo(client->zBackgroundWriter());
                background.unlock();
                message->release();
            }
            else
            {
                queueCs.unlock();
                emptyBackgroundQueueSync.notifyAll();
                backgroundQueueSync.wait();
            }
        }
        backgroundFinished = 1;
    });
    while (online)
    {
        queueCs.lock();
        if (foregroundQueue.hat(0))
        {
            NetworkMessage* message = foregroundQueue.get(0);
            foregroundQueue.remove(0);
            queueCs.unlock();
            foreground.lock();
            message->writeTo(client->zForegroundWriter());
            foreground.unlock();
            message->release();
        }
        else
        {
            queueCs.unlock();
            emptyForegroundQueueSync.notifyAll();
            foregroundQueueSync.wait();
        }
    }
    foregroundFinished = 1;
}

void GameClient::sendWorldUpdate(WorldUpdate* update)
{
    bool add = 0;
    if (zPlayer->getCurrentDimensionId() == update->getAffectedDimension())
    {
        auto pos = (Vec3<int>)zPlayer->getPosition();
        int dist = update->distanceTo(pos.x, pos.y);
        if (dist < viewDistance * CHUNK_SIZE)
        {
            other.lock();
            int index = 0;
            for (auto update2 : updateQueue)
            {
                int dist2 = update2->distanceTo(pos.x, pos.y);
                if (dist2 > dist) break;
                index++;
            }
            updateQueue.add(update, index);
            other.unlock();
            updateSync.notify();
            add = 1;
        }
    }
    if (!add) update->release();
}

void GameClient::reply()
{
    other.lock();
    for (auto req : requests)
        Game::INSTANCE->api(req, this);
    requests.leeren();
    other.unlock();
    if (first)
    {
        foreground.lock();
        int id = zPlayer->getId();
        client->zForegroundWriter()->schreibe(
            (char*)&Message::POSITION_UPDATE, 1);
        client->zForegroundWriter()->schreibe((char*)&id, 4);
        foreground.unlock();
        first = 0;
    }
}

void GameClient::logout()
{
    online = 0;
    updateSync.notify();
    emptyForegroundQueueSync.notifyAll();
    emptyBackgroundQueueSync.notifyAll();
    foregroundQueueSync.notify();
    backgroundQueueSync.notify();
}

void GameClient::addMessage(StreamReader* reader)
{
    short len = 0;
    reader->lese((char*)&len, 2);
    InMemoryBuffer* buffer = new InMemoryBuffer();
    char* tmp = new char[len];
    reader->lese(tmp, len);
    buffer->schreibe(tmp, len);
    delete[] tmp;
    other.lock();
    requests.add(buffer);
    other.unlock();
}

bool GameClient::isOnline() const
{
    return online;
}

void GameClient::sendResponse(NetworkMessage* response)
{
    queueCs.lock();
    if (response->isUseBackground())
    {
        if (backgroundQueue.getEintragAnzahl() > 20)
        {
            queueCs.unlock();
            emptyBackgroundQueueSync.wait();
            queueCs.lock();
        }
        backgroundQueue.add(response);
        queueCs.unlock();
        backgroundQueueSync.notify();
    }
    else
    {
        if (foregroundQueue.getEintragAnzahl() > 100)
        {
            queueCs.unlock();
            std::cout << "WARNING: Game paused because nework connection to "
                      << zPlayer->getName() << " is to slow.\n";
            ZeitMesser m;
            m.messungStart();
            emptyForegroundQueueSync.wait();
            m.messungEnde();
            std::cout << "WARNING: Game resumed after " << m.getSekunden()
                      << " seconds.\n";
            queueCs.lock();
        }
        foregroundQueue.add(response);
        queueCs.unlock();
        foregroundQueueSync.notify();
    }
}

Player* GameClient::zEntity() const
{
    return zPlayer;
}

void GameClient::sendTypes()
{
    foreground.lock();
    int count = StaticRegistry<BlockType>::INSTANCE.getCount();
    client->zForegroundWriter()->schreibe((char*)&count, 4);
    for (int i = 0; i < count; i++)
    {
        BlockType* t = StaticRegistry<BlockType>::INSTANCE.zElement(i);
        int id = t->getId();
        client->zForegroundWriter()->schreibe((char*)&id, 4);
        bool inst = t->doesNeedClientInstance();
        client->zForegroundWriter()->schreibe((char*)&inst, 1);
        int maxHp = t->getInitialMaxHP();
        client->zForegroundWriter()->schreibe((char*)&maxHp, 4);
        t->getModel().writeTo(client->zForegroundWriter());
    }
    count = 0;
    for (int i = 0; i < StaticRegistry<ItemType>::INSTANCE.getCount(); i++)
    {
        if (StaticRegistry<ItemType>::INSTANCE.zElement(i)) count++;
    }
    client->zForegroundWriter()->schreibe((char*)&count, 4);
    for (int i = 0; i < StaticRegistry<ItemType>::INSTANCE.getCount(); i++)
    {
        if (StaticRegistry<ItemType>::INSTANCE.zElement(i))
        {
            ItemType* t = StaticRegistry<ItemType>::INSTANCE.zElement(i);
            int id = t->getId();
            client->zForegroundWriter()->schreibe((char*)&id, 4);
            t->getModel().writeTo(client->zForegroundWriter());
        }
    }
    count = StaticRegistry<EntityType>::INSTANCE.getCount();
    client->zForegroundWriter()->schreibe((char*)&count, 4);
    for (int i = 0; i < count; i++)
    {
        EntityType* t = StaticRegistry<EntityType>::INSTANCE.zElement(i);
        int id = t->getId();
        client->zForegroundWriter()->schreibe((char*)&id, 4);
        t->getModel().writeTo(client->zForegroundWriter());
    }
    foreground.unlock();
}

Game::Game(Framework::Text name, Framework::Text worldsDir)
    : Thread(),
      name(name),
      dimensions(new RCArray<Dimension>()),
      updates(new RCArray<WorldUpdate>()),
      clients(new RCArray<GameClient>()),
      ticker(new TickOrganizer()),
      path((const char*)(worldsDir + "/" + name)),
      stop(0),
      tickId(0),
      nextEntityId(0),
      generator(0),
      loader(0),
      totalTickTime(0),
      tickCounter(0)
{
    if (!DateiExistiert(worldsDir + "/" + name))
        DateiPfadErstellen(worldsDir + "/" + name + "/");
    Datei d;
    d.setDatei(path + "/eid");
    if (d.existiert())
    {
        d.open(Datei::Style::lesen);
        d.lese((char*)&nextEntityId, 4);
        d.close();
    }
    start();
}

Game::~Game()
{
    dimensions->release();
    updates->release();
    clients->release();
    generator->release();
    loader->release();
}

void Game::initialize()
{
    int seed = 0;
    int index = 0;
    for (const char* n = name; *n; n++)
        seed += (int)pow((float)*n * 31, (float)++index);
    generator = new WorldGenerator(seed);
    loader = new WorldLoader();
    recipies.loadRecipies("data/recipies");
}

void Game::thread()
{
    ZeitMesser waitForLock;
    ZeitMesser removeOldClients;
    ZeitMesser tickEntities;
    ZeitMesser worldUpdates;
    ZeitMesser clientReply;
    ZeitMesser removeOldChunks;
    ZeitMesser m;
    while (!stop)
    {
        m.messungStart();
        ticker->nextTick();
        actionsCs.lock();
        while (actions.getEintragAnzahl() > 0)
        {
            actions.get(0)();
            actions.remove(0);
        }
        actionsCs.unlock();
        Array<int> removed;
        double waitTotal = 0;
        waitForLock.messungStart();
        cs.lock();
        waitForLock.messungEnde();
        waitTotal += waitForLock.getSekunden();
        removeOldClients.messungStart();
        int index = 0;
        for (auto player : *clients)
        {
            if (!player->isOnline())
            {
                std::cout << "player " << player->zEntity()->getName()
                          << " disconnected.\n";
                Datei pFile;
                pFile.setDatei(
                    path + "/player/" + player->zEntity()->getName());
                pFile.erstellen();
                if (pFile.open(Datei::Style::schreiben))
                    StaticRegistry<EntityType>::INSTANCE
                        .zElement(EntityTypeEnum::PLAYER)
                        ->saveEntity(player->zEntity(), &pFile);
                pFile.close();
                removed.add(index, 0);
                Dimension* dim
                    = zDimension(player->zEntity()->getCurrentDimensionId());
                dim->removeSubscriptions(player->zEntity());
                this->requestWorldUpdate(
                    new EntityRemovedUpdate(player->zEntity()->getId(),
                        player->zEntity()->getCurrentDimensionId(),
                        player->zEntity()->getPosition()));
            }
            index++;
        }
        for (auto i : removed)
            clients->remove(i);
        removeOldClients.messungEnde();
        cs.unlock();
        tickEntities.messungStart();
        for (auto dim : *dimensions)
            dim->tickEntities();
        tickEntities.messungEnde();
        waitForLock.messungStart();
        cs.lock();
        waitForLock.messungEnde();
        waitTotal += waitForLock.getSekunden();
        worldUpdates.messungStart();
        while (updates->hat(0))
        {
            WorldUpdate* update = updates->z(0);
            for (auto client : *clients)
                client->sendWorldUpdate(
                    dynamic_cast<WorldUpdate*>(update->getThis()));
            if (!zDimension(update->getAffectedDimension()))
                addDimension(new Dimension(update->getAffectedDimension()));
            update->onUpdate(zDimension(update->getAffectedDimension()));
            updates->remove(0);
        }
        worldUpdates.messungEnde();
        cs.unlock();
        clientReply.messungStart();
        for (auto client : *clients)
            client->reply();
        clientReply.messungEnde();
        waitForLock.messungStart();
        cs.lock();
        waitForLock.messungEnde();
        waitTotal += waitForLock.getSekunden();
        removeOldChunks.messungStart();
        for (auto dim : *dimensions)
            dim->removeOldChunks();
        removeOldChunks.messungEnde();
        cs.unlock();
        m.messungEnde();
        double sec = m.getSekunden();
        tickCounter++;
        totalTickTime += sec;
        if (tickCounter >= 1000)
        {
            std::cout << "Average Tick time: " << (totalTickTime / 1000)
                      << "\n";
            if ((totalTickTime / 1000) * 20 > 1)
            {
                std::cout << "The game runns slower than normal.\n";
            }
            else
            {
                std::cout << "No performance issues detected.\n";
            }
            totalTickTime = 0;
            tickCounter = 0;
        }
        if (sec < 0.05)
            Sleep((int)((0.05 - sec) * 1000));
        else if (sec > 1)
        {
            std::cout << "WARNING: tick needed " << sec
                      << " seconds. The game will run sower then normal.\n";
            std::cout << "waiting: " << waitTotal << "\nremoveOldClients: "
                      << removeOldClients.getSekunden()
                      << "\ntickEntities:" << tickEntities.getSekunden()
                      << "\nworldUpdates: " << worldUpdates.getSekunden()
                      << "\nclientReply: " << clientReply.getSekunden()
                      << "\nremoveOldChunks:" << removeOldChunks.getSekunden()
                      << "\n";
        }
    }
    save();
    generator->exitAndWait();
    loader->exitAndWait();
    ticker->exitAndWait();
    for (Dimension* dim : *dimensions)
        dim->requestStopAndWait();
    std::cout << "Game thread exited\n";
}

void Game::api(Framework::InMemoryBuffer* zRequest, GameClient* zOrigin)
{
    char type;
    zRequest->lese(&type, 1);
    NetworkMessage* response = new NetworkMessage();
    switch (type)
    {
    case 1: // world
        {
            Dimension* dim
                = zDimension(zOrigin->zEntity()->getCurrentDimensionId());
            if (!dim)
            {
                dim = new Dimension(
                    zOrigin->zEntity()->getCurrentDimensionId());
                addDimension(dim);
            }
            dim->api(zRequest, response, zOrigin->zEntity());
            break;
        }
    case 2: // player
        zOrigin->zEntity()->playerApi(zRequest, response);
        break;
    case 3: // entity
        {
            int id;
            zRequest->lese((char*)&id, 4);
            for (Dimension* dim : *dimensions)
            {
                Entity* entity = dim->zEntity(id);
                if (entity)
                {
                    entity->api(zRequest, response, zOrigin->zEntity());
                    break;
                }
            }
            break;
        }
    case 4:
        { // inventory
            bool isEntity;
            zRequest->lese((char*)&isEntity, 1);
            Inventory* target;
            if (isEntity)
            {
                int id;
                zRequest->lese((char*)&id, 4);
                target = zEntity(id);
            }
            else
            {
                int dim;
                Vec3<int> pos;
                zRequest->lese((char*)&dim, 4);
                zRequest->lese((char*)&pos.x, 4);
                zRequest->lese((char*)&pos.y, 4);
                zRequest->lese((char*)&pos.z, 4);
                target = zBlockAt(pos, dim);
            }
            if (target)
                target->inventoryApi(zRequest, response, zOrigin->zEntity());
            break;
        }
    default:
        std::cout << "received unknown api request in game with type "
                  << (int)type << "\n";
    }
    if (!response->isEmpty())
    {
        if (response->isBroadcast())
            broadcastMessage(response);
        else
            zOrigin->sendResponse(response);
    }
    else
    {
        response->release();
    }
}

void Game::updateLightning(int dimensionId, Vec3<int> location)
{
    Dimension* zDim = zDimension(dimensionId);
    if (zDim) zDim->updateLightning(location);
}

void Game::updateLightningWithoutWait(int dimensionId, Vec3<int> location)
{
    Dimension* zDim = zDimension(dimensionId);
    if (zDim) zDim->updateLightningWithoutWait(location);
}

void Game::broadcastMessage(NetworkMessage* response)
{
    for (auto client : *clients)
        client->sendResponse(
            dynamic_cast<NetworkMessage*>(response->getThis()));
}

void Game::sendMessage(NetworkMessage* response, Entity* zTargetPlayer)
{
    for (auto client : *clients)
    {
        if (client->zEntity()->getId() == zTargetPlayer->getId())
        {
            client->sendResponse(response);
            return;
        }
    }
    response->release();
}

bool Game::requestWorldUpdate(WorldUpdate* update)
{
    cs.lock();
    for (WorldUpdate* u : *updates)
    {
        if (u->getMaxAffectedPoint().x >= update->getMinAffectedPoint().x
            && u->getMinAffectedPoint().x <= update->getMaxAffectedPoint().x
            && u->getMaxAffectedPoint().y >= update->getMinAffectedPoint().y
            && u->getMinAffectedPoint().y <= update->getMaxAffectedPoint().y
            && u->getMaxAffectedPoint().z >= update->getMinAffectedPoint().z
            && u->getMinAffectedPoint().z <= update->getMaxAffectedPoint().z
            && u->getType() == update->getType())
        {
            cs.unlock();
            update->release();
            return 0;
        }
    }
    updates->add(update);
    cs.unlock();
    return 1;
}

bool Game::checkPlayer(Framework::Text name, Framework::Text secret)
{
    Datei pFile;
    pFile.setDatei(path + "/player/" + name + ".key");
    if (!pFile.existiert())
    {
        if (!secret.getLength())
            return 1;
        else
        {
            std::cout << "player " << name.getText()
                      << " tryed to connect with an invalid secret.\n";
            return 0;
        }
    }
    pFile.open(Datei::Style::lesen);
    char* buffer = new char[(int)pFile.getSize()];
    pFile.lese(buffer, (int)pFile.getSize());
    bool eq = 1;
    int sLen = secret.getLength();
    for (int i = 0; i < pFile.getSize();
         i++) // !!SECURITY!! runtime should not be dependent on the position of
              // the first unequal character in the secret
        eq &= buffer[i] == (sLen > i ? secret[i] : ~buffer[i]);
    delete[] buffer;
    pFile.close();
    if (!eq)
    {
        std::cout << "player " << name.getText()
                  << " tryed to connect with an invalid secret.\n";
    }
    return eq;
}

bool Game::existsPlayer(Framework::Text name)
{
    Datei pFile;
    pFile.setDatei(path + "/player/" + name + ".key");
    return pFile.existiert();
}

Framework::Text Game::createPlayer(Framework::Text name)
{
    Datei pFile;
    pFile.setDatei(path + "/player/" + name + ".key");
    if (!pFile.existiert())
    {
        pFile.erstellen();
        int keyLen;
        char* key = randomKey(keyLen);
        pFile.open(Datei::Style::schreiben);
        pFile.schreibe(key, keyLen);
        pFile.close();
        Text res = "";
        for (int i = 0; i < keyLen; i++)
            res.append(key[i]);
        delete[] key;
        return res;
    }
    return "";
}

GameClient* Game::addPlayer(FCKlient* client, Framework::Text name)
{
    cs.lock();
    Datei pFile;
    pFile.setDatei(path + "/player/" + name);
    std::cout << "player " << name.getText() << " connected.\n";
    Player* player;
    bool isNew = 0;
    if (!pFile.existiert() || !pFile.open(Datei::Style::lesen))
    {
        player = (Player*)StaticRegistry<EntityType>::INSTANCE
                     .zElement(EntityTypeEnum::PLAYER)
                     ->createEntityAt(
                         Vec3<float>(0.5, 0.5, 0), DimensionEnum::OVERWORLD);
        player->setName(name);
        isNew = 1;
    }
    else
    {
        player = (Player*)StaticRegistry<EntityType>::INSTANCE
                     .zElement(EntityTypeEnum::PLAYER)
                     ->loadEntity(&pFile);
        pFile.close();
    }
    if (player->getId() >= nextEntityId)
    {
        nextEntityId = player->getId() + 1;
    }
    GameClient* gameClient = new GameClient(player, client);
    gameClient->sendTypes();
    clients->add(gameClient);
    if (!zDimension(player->getCurrentDimensionId()))
    {
        this->addDimension(new Dimension(player->getCurrentDimensionId()));
    }
    // subscribe the new player as an observer of the new chunk
    Dimension* dim = zDimension(player->getCurrentDimensionId());
    InMemoryBuffer* buffer = new InMemoryBuffer();
    buffer->schreibe("\0", 1);
    Punkt center = getChunkCenter(
        (int)player->getPosition().x, (int)player->getPosition().y);
    buffer->schreibe((char*)&center.x, 4);
    buffer->schreibe((char*)&center.y, 4);
    buffer->schreibe("\0", 1);
    dim->api(buffer, 0, player);
    buffer->release();
    while (isNew
           && !dim->zChunk(getChunkCenter(
               (int)player->getPosition().x, (int)player->getPosition().y)))
    {
        cs.unlock();
        Sleep(1000);
        cs.lock();
    }
    if (isNew)
    {
        Either<Block*, int> b = BlockTypeEnum::AIR;
        int h = WORLD_HEIGHT;
        while (((b.isA() && (!(Block*)b || ((Block*)b)->isPassable()))
                   || (b.isB()
                       && StaticRegistry<BlockType>::INSTANCE.zElement(b)
                              ->zDefault()
                              ->isPassable()))
               && h > 0)
            b = zBlockAt({(int)player->getPosition().x,
                             (int)player->getPosition().y,
                             --h},
                player->getCurrentDimensionId());
        player->setPosition(
            {player->getPosition().x, player->getPosition().y, (float)h + 1.f});
    }
    requestWorldUpdate(
        new AddEntityUpdate(player, player->getCurrentDimensionId()));
    cs.unlock();
    return dynamic_cast<GameClient*>(gameClient->getThis());
}

bool Game::isChunkLoaded(int x, int y, int dimension) const
{
    Dimension* dim = zDimension(dimension);
    return (dim && dim->hasChunck(x, y));
}

bool Game::doesChunkExist(int x, int y, int dimension)
{
    cs.lock();
    bool result = isChunkLoaded(x, y, dimension)
               || loader->existsChunk(x, y, dimension);
    cs.unlock();
    return result;
}

void Game::blockTargetChanged(Block* zBlock)
{
    for (GameClient* client : *this->clients)
    {
        if (client->zEntity()->zTarget()
            && client->zEntity()->zTarget()->isBlock(
                zBlock->getPos(), NO_DIRECTION))
        {
            client->zEntity()->onTargetChange();
        }
    }
}

void Game::entityTargetChanged(Entity* zEntity)
{
    for (GameClient* client : *this->clients)
    {
        if (client->zEntity()->zTarget()
            && client->zEntity()->zTarget()->isEntity(zEntity->getId()))
        {
            client->zEntity()->onTargetChange();
        }
    }
}

Framework::Either<Block*, int> Game::zBlockAt(
    Framework::Vec3<int> location, int dimension) const
{
    Dimension* dim = zDimension(dimension);
    if (dim) return dim->zBlock(location);
    return 0;
}

Block* Game::zRealBlockInstance(Framework::Vec3<int> location, int dimension)
{
    Dimension* dim = zDimension(dimension);
    if (dim) return dim->zRealBlockInstance(location);
    return 0;
}

Dimension* Game::zDimension(int id) const
{
    for (auto dim : *dimensions)
    {
        if (dim->getDimensionId() == id) return dim;
    }
    return 0;
}

Framework::Punkt Game::getChunkCenter(int x, int y)
{
    return Punkt(((x < 0 ? x + 1 : x) / CHUNK_SIZE) * CHUNK_SIZE
                     + (x < 0 ? -CHUNK_SIZE : CHUNK_SIZE) / 2,
        ((y < 0 ? y + 1 : y) / CHUNK_SIZE) * CHUNK_SIZE
            + (y < 0 ? -CHUNK_SIZE : CHUNK_SIZE) / 2);
}

Area Game::getChunckArea(Punkt center) const
{
    return {center.x - CHUNK_SIZE / 2,
        center.y - CHUNK_SIZE / 2,
        center.x + CHUNK_SIZE / 2 - 1,
        center.y + CHUNK_SIZE / 2 - 1,
        0};
}

Framework::Text Game::getWorldDirectory() const
{
    return path;
}

void Game::requestArea(Area area)
{
    generator->requestGeneration(area);
    loader->requestLoading(area);
}

void Game::save() const
{
    Datei d;
    d.setDatei(path + "/eid");
    d.open(Datei::Style::schreiben);
    d.schreibe((char*)&nextEntityId, 4);
    d.close();
    for (auto dim : *dimensions)
        dim->save(path);
}

void Game::requestStop()
{
    stop = 1;
    warteAufThread(1000000);
}

void Game::addDimension(Dimension* d)
{
    dimensions->add(d);
}

int Game::getNextEntityId()
{
    cs.lock();
    int result = nextEntityId++;
    cs.unlock();
    return result;
}

WorldGenerator* Game::zGenerator() const
{
    return generator;
}

Game* Game::INSTANCE = 0;

void Game::initialize(Framework::Text name, Framework::Text worldsDir)
{
    if (!Game::INSTANCE)
    {
        Game::INSTANCE = new Game(name, worldsDir);
        Game::INSTANCE->initialize();
    }
}

Entity* Game::zEntity(int id, int dimensionId) const
{
    Dimension* d = zDimension(dimensionId);
    if (d) return d->zEntity(id);
    return 0;
}

Entity* Game::zEntity(int id) const
{
    for (Dimension* d : *dimensions)
    {
        Entity* e = d->zEntity(id);
        if (e) return e;
    }
    // for new players that are currently loading
    for (GameClient* client : *clients)
    {
        if (client->zEntity()->getId() == id)
        {
            return client->zEntity();
        }
    }
    return 0;
}

Entity* Game::zNearestEntity(int dimensionId,
    Framework::Vec3<float> pos,
    std::function<bool(Entity*)> filter)
{
    Dimension* d = zDimension(dimensionId);
    if (!d) return 0;
    return d->zNearestEntity(pos, filter);
}

const RecipieLoader& Game::getRecipies() const
{
    return recipies;
}

void Game::doLater(std::function<void()> action)
{
    actionsCs.lock();
    actions.add(action);
    actionsCs.unlock();
}

TickOrganizer* Game::zTickOrganizer() const
{
    return ticker;
}