Tutorial 21: Quake3 Explorer

This Tutorial shows how to load different Quake 3 maps.

Features:

• Load BSP Archives at Runtime from the menu
• Load a Map from the menu. Showing with Screenshot
• Set the VideoDriver at runtime from menu
• Adjust GammaLevel at runtime
• Create SceneNodes for the Shaders
• Load EntityList and create Entity SceneNodes
• Create Players with Weapons and with Collision Response
• Play music

You can download the Quake III Arena demo ( copyright id software ) at the following location: ftp://ftp.idsoftware.com/idstuff/quake3/win32/q3ademo.exe

Copyright 2006-2011 Burningwater, Thomas Alten

#include "driverChoice.h"
#include <irrlicht.h>
#include "q3factory.h"
#include "sound.h"

Game Data is used to hold Data which is needed to drive the game

struct GameData
{
    GameData ( const path &startupDir) :
        retVal(0), StartupDir(startupDir), createExDevice(0), Device(0)
    {
        setDefault ();
    }

    void setDefault ();
    s32 save ( const path &filename );
    s32 load ( const path &filename );

    s32 debugState;
    s32 gravityState;
    s32 flyTroughState;
    s32 wireFrame;
    s32 guiActive;
    s32 guiInputActive;
    f32 GammaValue;
    s32 retVal;
    s32 sound;

    path StartupDir;
    stringw CurrentMapName;
    array<path> CurrentArchiveList;

    vector3df PlayerPosition;
    vector3df PlayerRotation;

    tQ3EntityList Variable;

    Q3LevelLoadParameter loadParam;
    SIrrlichtCreationParameters deviceParam;
    funcptr_createDeviceEx createExDevice;
    IrrlichtDevice *Device;
};

set default settings

void GameData::setDefault ()
{
    debugState = EDS_OFF;
    gravityState = 1;
    flyTroughState = 0;
    wireFrame = 0;
    guiActive = 1;
    guiInputActive = 0;
    GammaValue = 1.f;

    // default deviceParam;
#if defined ( _IRR_WINDOWS_ )
    deviceParam.DriverType = EDT_DIRECT3D9;
#else
    deviceParam.DriverType = EDT_OPENGL;
#endif
    deviceParam.WindowSize.Width = 800;
    deviceParam.WindowSize.Height = 600;
    deviceParam.Fullscreen = false;
    deviceParam.Bits = 24;
    deviceParam.ZBufferBits = 16;
    deviceParam.Vsync = false;
    deviceParam.AntiAlias = false;

    // default Quake3 loadParam
    loadParam.defaultLightMapMaterial = EMT_LIGHTMAP;
    loadParam.defaultModulate = EMFN_MODULATE_1X;
    loadParam.defaultFilter = EMF_ANISOTROPIC_FILTER;
    loadParam.verbose = 2;
    loadParam.mergeShaderBuffer = 1;        // merge meshbuffers with same material
    loadParam.cleanUnResolvedMeshes = 1;    // should unresolved meshes be cleaned. otherwise blue texture
    loadParam.loadAllShaders = 1;           // load all scripts in the script directory
    loadParam.loadSkyShader = 0;            // load sky Shader
    loadParam.alpharef = 1;

    sound = 0;

    CurrentMapName = "";
    CurrentArchiveList.clear ();

    // Explorer Media directory
    CurrentArchiveList.push_back ( StartupDir + "../../media/" );

    // Add the original quake3 files before you load your custom map
    // Most mods are using the original shaders, models&items&weapons
    CurrentArchiveList.push_back("/q/baseq3/");

    CurrentArchiveList.push_back(StartupDir + "../../media/map-20kdm2.pk3");
}

Load the current game State from a typical quake3 cfg file

s32 GameData::load ( const path &filename )
{
    if (!Device)
        return 0;

    // the quake3 mesh loader can also handle *.shader and *.cfg file
    IQ3LevelMesh* mesh = (IQ3LevelMesh*) Device->getSceneManager()->getMesh ( filename );
    if (!mesh)
        return 0;

    tQ3EntityList &entityList = mesh->getEntityList ();

    stringc s;
    u32 pos;

    for ( u32 e = 0; e != entityList.size (); ++e )
    {
        //dumpShader ( s, &entityList[e], false );
        //printf ( s.c_str () );

        for ( u32 g = 0; g != entityList[e].getGroupSize (); ++g )
        {
            const SVarGroup *group = entityList[e].getGroup ( g );

            for ( u32 index = 0; index < group->Variable.size (); ++index )
            {
                const SVariable &v = group->Variable[index];
                pos = 0;
                if ( v.name == "playerposition" )
                {
                    PlayerPosition = getAsVector3df ( v.content, pos );
                }
                else
                if ( v.name == "playerrotation" )
                {
                    PlayerRotation = getAsVector3df ( v.content, pos );
                }
            }
        }
    }

    return 1;
}

Store the current game State in a quake3 configuration file

s32 GameData::save ( const path &filename )
{
    return 0;
    if (!Device)
        return 0;

    c8 buf[128];
    u32 i;

    // Store current Archive for restart
    CurrentArchiveList.clear();
    IFileSystem *fs = Device->getFileSystem();
    for ( i = 0; i != fs->getFileArchiveCount(); ++i )
    {
        CurrentArchiveList.push_back ( fs->getFileArchive(i)->getFileList()->getPath() );
    }

    // Store Player Position and Rotation
    ICameraSceneNode * camera = Device->getSceneManager()->getActiveCamera ();
    if ( camera )
    {
        PlayerPosition = camera->getPosition ();
        PlayerRotation = camera->getRotation ();
    }

    IWriteFile *file = fs->createAndWriteFile ( filename );
    if (!file)
        return 0;

    snprintf ( buf, 128, "playerposition %.f %.f %.f\nplayerrotation %.f %.f %.f\n",
            PlayerPosition.X, PlayerPosition.Z, PlayerPosition.Y,
            PlayerRotation.X, PlayerRotation.Z, PlayerRotation.Y);
    file->write ( buf, (s32) strlen ( buf ) );
    for ( i = 0; i != fs->getFileArchiveCount(); ++i )
    {
        snprintf ( buf, 128, "archive %s\n",stringc ( fs->getFileArchive(i)->getFileList()->getPath() ).c_str () );
        file->write ( buf, (s32) strlen ( buf ) );
    }

    file->drop ();
    return 1;
}

Representing a player

struct Q3Player : public IAnimationEndCallBack
{
    Q3Player ()
    : Device(0), MapParent(0), Mesh(0), WeaponNode(0), StartPositionCurrent(0)
    {
        animation[0] = 0;
        memset(Anim, 0, sizeof(TimeFire)*4);
    }

    virtual void OnAnimationEnd(IAnimatedMeshSceneNode* node);

    void create (   IrrlichtDevice *device,
                    IQ3LevelMesh* mesh,
                    ISceneNode *mapNode,
                    IMetaTriangleSelector *meta
                );
    void shutdown ();
    void setAnim ( const c8 *name );
    void respawn ();
    void setpos ( const vector3df &pos, const vector3df& rotation );

    ISceneNodeAnimatorCollisionResponse * cam() { return camCollisionResponse ( Device ); }

    IrrlichtDevice *Device;
    ISceneNode* MapParent;
    IQ3LevelMesh* Mesh;
    IAnimatedMeshSceneNode* WeaponNode;
    s32 StartPositionCurrent;
    TimeFire Anim[4];
    c8 animation[64];
    c8 buf[64];
};

End player

void Q3Player::shutdown ()
{
    setAnim ( 0 );

    dropElement (WeaponNode);

    if ( Device )
    {
        ICameraSceneNode* camera = Device->getSceneManager()->getActiveCamera();
        dropElement ( camera );
        Device = 0;
    }

    MapParent = 0;
    Mesh = 0;
}

create a new player

void Q3Player::create ( IrrlichtDevice *device, IQ3LevelMesh* mesh, ISceneNode *mapNode, IMetaTriangleSelector *meta )
{
    setTimeFire ( Anim + 0, 200, FIRED );
    setTimeFire ( Anim + 1, 5000 );

    if (!device)
        return;
    // load FPS weapon to Camera
    Device = device;
    Mesh = mesh;
    MapParent = mapNode;

    ISceneManager *smgr = device->getSceneManager ();
    IVideoDriver * driver = device->getVideoDriver();

    ICameraSceneNode* camera = 0;

    SKeyMap keyMap[10];
    keyMap[0].Action = EKA_MOVE_FORWARD;
    keyMap[0].KeyCode = KEY_UP;
    keyMap[1].Action = EKA_MOVE_FORWARD;
    keyMap[1].KeyCode = KEY_KEY_W;

    keyMap[2].Action = EKA_MOVE_BACKWARD;
    keyMap[2].KeyCode = KEY_DOWN;
    keyMap[3].Action = EKA_MOVE_BACKWARD;
    keyMap[3].KeyCode = KEY_KEY_S;

    keyMap[4].Action = EKA_STRAFE_LEFT;
    keyMap[4].KeyCode = KEY_LEFT;
    keyMap[5].Action = EKA_STRAFE_LEFT;
    keyMap[5].KeyCode = KEY_KEY_A;

    keyMap[6].Action = EKA_STRAFE_RIGHT;
    keyMap[6].KeyCode = KEY_RIGHT;
    keyMap[7].Action = EKA_STRAFE_RIGHT;
    keyMap[7].KeyCode = KEY_KEY_D;

    keyMap[8].Action = EKA_JUMP_UP;
    keyMap[8].KeyCode = KEY_KEY_J;

    keyMap[9].Action = EKA_CROUCH;
    keyMap[9].KeyCode = KEY_KEY_C;

    camera = smgr->addCameraSceneNodeFPS(0, 100.0f, 0.6f, -1, keyMap, 10, false, 0.6f);
    camera->setName ( "First Person Camera" );
    //camera->setFOV ( 100.f * core::DEGTORAD );
    camera->setFarValue( 20000.f );

    IAnimatedMeshMD2* weaponMesh = (IAnimatedMeshMD2*) smgr->getMesh("gun.md2");
    if ( 0 == weaponMesh )
        return;

    if ( weaponMesh->getMeshType() == EAMT_MD2 )
    {
        s32 count = weaponMesh->getAnimationCount();
        for ( s32 i = 0; i != count; ++i )
        {
            snprintf ( buf, 64, "Animation: %s", weaponMesh->getAnimationName(i) );
            device->getLogger()->log(buf, ELL_INFORMATION);
        }
    }

    WeaponNode = smgr->addAnimatedMeshSceneNode(
                        weaponMesh,
                        smgr->getActiveCamera(),
                        10,
                        vector3df( 0, 0, 0),
                        vector3df(-90,-90,90)
                        );
    WeaponNode->setMaterialFlag(EMF_LIGHTING, false);
    WeaponNode->setMaterialTexture(0, driver->getTexture( "gun.jpg"));
    WeaponNode->setLoopMode ( false );
    WeaponNode->setName ( "tommi the gun man" );

    //create a collision auto response animator
    ISceneNodeAnimator* anim =
        smgr->createCollisionResponseAnimator( meta, camera,
            vector3df(30,45,30),
            getGravity ( "earth" ),
            vector3df(0,40,0),
            0.0005f
        );

    camera->addAnimator( anim );
    anim->drop();

    if ( meta )
    {
        meta->drop ();
    }

    respawn ();
    setAnim ( "idle" );
}

so we need a good starting Position in the level. we can ask the Quake3 Loader for all entities with class_name "info_player_deathmatch"

void Q3Player::respawn ()
{
    if (!Device)
        return;
    ICameraSceneNode* camera = Device->getSceneManager()->getActiveCamera();

    Device->getLogger()->log( "respawn" );

    if ( StartPositionCurrent >= Q3StartPosition (
            Mesh, camera,StartPositionCurrent++,
            cam ()->getEllipsoidTranslation() )
        )
    {
        StartPositionCurrent = 0;
    }
}

set Player position from saved coordinates

void Q3Player::setpos ( const vector3df &pos, const vector3df &rotation )
{
    if (!Device)
        return;
    Device->getLogger()->log( "setpos" );

    ICameraSceneNode* camera = Device->getSceneManager()->getActiveCamera();
    if ( camera )
    {
        camera->setPosition ( pos );
        camera->setRotation ( rotation );
        camera->OnAnimate ( 0 );
    }
}

set the Animation of the player and weapon

void Q3Player::setAnim ( const c8 *name )
{
    if ( name )
    {
        snprintf ( animation, 64, "%s", name );
        if ( WeaponNode )
        {
            WeaponNode->setAnimationEndCallback ( this );
            WeaponNode->setMD2Animation ( animation );
        }
    }
    else
    {
        animation[0] = 0;
        if ( WeaponNode )
        {
            WeaponNode->setAnimationEndCallback ( 0 );
        }
    }
}


// Callback
void Q3Player::OnAnimationEnd(IAnimatedMeshSceneNode* node)
{
    setAnim ( 0 );
}

GUI Elements

struct GUI
{
    GUI ()
    {
        memset ( this, 0, sizeof ( *this ) );
    }

    void drop()
    {
        dropElement ( Window );
        dropElement ( Logo );
    }

    IGUIComboBox* VideoDriver;
    IGUIComboBox* VideoMode;
    IGUICheckBox* FullScreen;
    IGUICheckBox* Bit32;
    IGUIScrollBar* MultiSample;
    IGUIButton* SetVideoMode;

    IGUIScrollBar* Tesselation;
    IGUIScrollBar* Gamma;
    IGUICheckBox* Collision;
    IGUICheckBox* Visible_Map;
    IGUICheckBox* Visible_Shader;
    IGUICheckBox* Visible_Fog;
    IGUICheckBox* Visible_Unresolved;
    IGUICheckBox* Visible_Skydome;
    IGUIButton* Respawn;

    IGUITable* ArchiveList;
    IGUIButton* ArchiveAdd;
    IGUIButton* ArchiveRemove;
    IGUIFileOpenDialog* ArchiveFileOpen;
    IGUIButton* ArchiveUp;
    IGUIButton* ArchiveDown;

    IGUIListBox* MapList;
    IGUITreeView* SceneTree;
    IGUIStaticText* StatusLine;
    IGUIImage* Logo;
    IGUIWindow* Window;
};

CQuake3EventHandler controls the game

class CQuake3EventHandler : public IEventReceiver
{
public:

    CQuake3EventHandler( GameData *gameData );
    virtual ~CQuake3EventHandler ();

    void Animate();
    void Render();

    void AddArchive ( const path& archiveName );
    void LoadMap ( const stringw& mapName, s32 collision );
    void CreatePlayers();
    void AddSky( u32 dome, const c8 *texture );
    Q3Player *GetPlayer ( u32 index ) { return &Player[index]; }

    void CreateGUI();
    void SetGUIActive( s32 command);

    bool OnEvent(const SEvent& eve);


private:

    GameData *Game;

    IQ3LevelMesh* Mesh;
    ISceneNode* MapParent;
    ISceneNode* ShaderParent;
    ISceneNode* ItemParent;
    ISceneNode* UnresolvedParent;
    ISceneNode* BulletParent;
    ISceneNode* FogParent;
    ISceneNode * SkyNode;
    IMetaTriangleSelector *Meta;

    c8 buf[256];

    Q3Player Player[2];

    struct SParticleImpact
    {
        u32 when;
        vector3df pos;
        vector3df outVector;
    };
    array<SParticleImpact> Impacts;
    void useItem( Q3Player * player);
    void createParticleImpacts( u32 now );

    void createTextures ();
    void addSceneTreeItem( ISceneNode * parent, IGUITreeViewNode* nodeParent);

    GUI gui;
    void dropMap ();
};

Constructor

CQuake3EventHandler::CQuake3EventHandler( GameData *game )
: Game(game), Mesh(0), MapParent(0), ShaderParent(0), ItemParent(0), UnresolvedParent(0),
    BulletParent(0), FogParent(0), SkyNode(0), Meta(0)
{
    buf[0]=0;
    // Also use 16 Bit Textures for 16 Bit RenderDevice
    if ( Game->deviceParam.Bits == 16 )
    {
        game->Device->getVideoDriver()->setTextureCreationFlag(ETCF_ALWAYS_16_BIT, true);
    }

    // Quake3 Shader controls Z-Writing
    game->Device->getSceneManager()->getParameters()->setAttribute(scene::ALLOW_ZWRITE_ON_TRANSPARENT, true);

    // create internal textures
    createTextures ();

    sound_init ( game->Device );

    Game->Device->setEventReceiver ( this );
}


// destructor
CQuake3EventHandler::~CQuake3EventHandler ()
{
    Player[0].shutdown ();
    sound_shutdown ();

    Game->save( "explorer.cfg" );

    Game->Device->drop();
}


// create runtime textures smog, fog
void CQuake3EventHandler::createTextures()
{
    IVideoDriver * driver = Game->Device->getVideoDriver();

    dimension2du dim(64, 64);

    video::IImage* image;
    u32 i;
    u32 x;
    u32 y;
    u32 * data;
    for ( i = 0; i != 8; ++i )
    {
        image = driver->createImage ( video::ECF_A8R8G8B8, dim);
        data = (u32*) image->lock ();
        for ( y = 0; y != dim.Height; ++y )
        {
            for ( x = 0; x != dim.Width; ++x )
            {
                data [x] = 0xFFFFFFFF;
            }
            data = (u32*) ( (u8*) data + image->getPitch() );
        }
        image->unlock();
        snprintf ( buf, 64, "smoke_%02d", i );
        driver->addTexture( buf, image );
        image->drop ();
    }

    // fog
    for ( i = 0; i != 1; ++i )
    {
        image = driver->createImage ( video::ECF_A8R8G8B8, dim);
        data = (u32*) image->lock ();
        for ( y = 0; y != dim.Height; ++y )
        {
            for ( x = 0; x != dim.Width; ++x )
            {
                data [x] = 0xFFFFFFFF;
            }
            data = (u32*) ( (u8*) data + image->getPitch() );
        }
        image->unlock();
        snprintf ( buf, 64, "fog_%02d", i );
        driver->addTexture( buf, image );
        image->drop ();
    }
}

create the GUI

void CQuake3EventHandler::CreateGUI()
{

    IGUIEnvironment *env = Game->Device->getGUIEnvironment();
    IVideoDriver * driver = Game->Device->getVideoDriver();

    gui.drop();

    // set skin font
    IGUIFont* font = env->getFont("fontlucida.png");
    if (font)
        env->getSkin()->setFont(font);
    env->getSkin()->setColor ( EGDC_BUTTON_TEXT, video::SColor(240,0xAA,0xAA,0xAA) );
    env->getSkin()->setColor ( EGDC_3D_HIGH_LIGHT, video::SColor(240,0x22,0x22,0x22) );
    env->getSkin()->setColor ( EGDC_3D_FACE, video::SColor(240,0x44,0x44,0x44) );
    env->getSkin()->setColor ( EGDC_EDITABLE, video::SColor(240,0x44,0x44,0x44) );
    env->getSkin()->setColor ( EGDC_FOCUSED_EDITABLE, video::SColor(240,0x54,0x54,0x54) );
    env->getSkin()->setColor ( EGDC_WINDOW, video::SColor(240,0x66,0x66,0x66) );

    // minimal gui size 800x600
    dimension2d<u32> dim ( 800, 600 );
    dimension2d<u32> vdim ( Game->Device->getVideoDriver()->getScreenSize() );

    if ( vdim.Height >= dim.Height && vdim.Width >= dim.Width )
    {
        //dim = vdim;
    }
    else
    {
    }

    gui.Window = env->addWindow ( rect<s32> ( 0, 0, dim.Width, dim.Height ), false, L"Quake3 Explorer" );
    gui.Window->setToolTipText ( L"Quake3Explorer. Loads and show various BSP File Format and Shaders." );
    gui.Window->getCloseButton()->setToolTipText ( L"Quit Quake3 Explorer" );

    // add a status line help text
    gui.StatusLine = env->addStaticText( 0, rect<s32>( 5,dim.Height - 30,dim.Width - 5,dim.Height - 10),
                                false, false, gui.Window, -1, true
                            );


    env->addStaticText ( L"VideoDriver:", rect<s32>( dim.Width - 400, 24, dim.Width - 310, 40 ),false, false, gui.Window, -1, false );
    gui.VideoDriver = env->addComboBox(rect<s32>( dim.Width - 300, 24, dim.Width - 10, 40 ),gui.Window);
    gui.VideoDriver->addItem(L"Direct3D 9.0c", EDT_DIRECT3D9 );
    gui.VideoDriver->addItem(L"Direct3D 8.1", EDT_DIRECT3D8 );
    gui.VideoDriver->addItem(L"OpenGL 1.5", EDT_OPENGL);
    gui.VideoDriver->addItem(L"Software Renderer", EDT_SOFTWARE);
    gui.VideoDriver->addItem(L"Burning's Video (TM) Thomas Alten", EDT_BURNINGSVIDEO);
    gui.VideoDriver->setSelected ( gui.VideoDriver->getIndexForItemData ( Game->deviceParam.DriverType ) );
    gui.VideoDriver->setToolTipText ( L"Use a VideoDriver" );

    env->addStaticText ( L"VideoMode:", rect<s32>( dim.Width - 400, 44, dim.Width - 310, 60 ),false, false, gui.Window, -1, false );
    gui.VideoMode = env->addComboBox(rect<s32>( dim.Width - 300, 44, dim.Width - 10, 60 ),gui.Window);
    gui.VideoMode->setToolTipText ( L"Supported Screenmodes" );
    IVideoModeList *modeList = Game->Device->getVideoModeList();
    if ( modeList )
    {
        s32 i;
        for ( i = 0; i != modeList->getVideoModeCount (); ++i )
        {
            u16 d = modeList->getVideoModeDepth ( i );
            if ( d < 16 )
                continue;

            u16 w = modeList->getVideoModeResolution ( i ).Width;
            u16 h = modeList->getVideoModeResolution ( i ).Height;
            u32 val = w << 16 | h;

            if ( gui.VideoMode->getIndexForItemData ( val ) >= 0 )
                continue;

            f32 aspect = (f32) w / (f32) h;
            const c8 *a = "";
            if ( core::equals ( aspect, 1.3333333333f ) ) a = "4:3";
            else if ( core::equals ( aspect, 1.6666666f ) ) a = "15:9 widescreen";
            else if ( core::equals ( aspect, 1.7777777f ) ) a = "16:9 widescreen";
            else if ( core::equals ( aspect, 1.6f ) ) a = "16:10 widescreen";
            else if ( core::equals ( aspect, 2.133333f ) ) a = "20:9 widescreen";

            snprintf ( buf, sizeof ( buf ), "%d x %d, %s",w, h, a );
            gui.VideoMode->addItem ( stringw ( buf ).c_str(), val );
        }
    }
    gui.VideoMode->setSelected ( gui.VideoMode->getIndexForItemData (
                                    Game->deviceParam.WindowSize.Width << 16 |
                                    Game->deviceParam.WindowSize.Height ) );

    gui.FullScreen = env->addCheckBox ( Game->deviceParam.Fullscreen, rect<s32>( dim.Width - 400, 64, dim.Width - 300, 80 ), gui.Window,-1, L"Fullscreen" );
    gui.FullScreen->setToolTipText ( L"Set Fullscreen or Window Mode" );

    gui.Bit32 = env->addCheckBox ( Game->deviceParam.Bits == 32, rect<s32>( dim.Width - 300, 64, dim.Width - 240, 80 ), gui.Window,-1, L"32Bit" );
    gui.Bit32->setToolTipText ( L"Use 16 or 32 Bit" );

    env->addStaticText ( L"MultiSample:", rect<s32>( dim.Width - 235, 64, dim.Width - 150, 80 ),false, false, gui.Window, -1, false );
    gui.MultiSample = env->addScrollBar( true, rect<s32>( dim.Width - 150, 64, dim.Width - 70, 80 ), gui.Window,-1 );
    gui.MultiSample->setMin ( 0 );
    gui.MultiSample->setMax ( 8 );
    gui.MultiSample->setSmallStep ( 1 );
    gui.MultiSample->setLargeStep ( 1 );
    gui.MultiSample->setPos ( Game->deviceParam.AntiAlias );
    gui.MultiSample->setToolTipText ( L"Set the MultiSample (disable, 1x, 2x, 4x, 8x )" );

    gui.SetVideoMode = env->addButton (rect<s32>( dim.Width - 60, 64, dim.Width - 10, 80 ), gui.Window, -1,L"set" );
    gui.SetVideoMode->setToolTipText ( L"Set Video Mode with current values" );

    env->addStaticText ( L"Gamma:", rect<s32>( dim.Width - 400, 104, dim.Width - 310, 120 ),false, false, gui.Window, -1, false );
    gui.Gamma = env->addScrollBar( true, rect<s32>( dim.Width - 300, 104, dim.Width - 10, 120 ), gui.Window,-1 );
    gui.Gamma->setMin ( 50 );
    gui.Gamma->setMax ( 350 );
    gui.Gamma->setSmallStep ( 1 );
    gui.Gamma->setLargeStep ( 10 );
    gui.Gamma->setPos ( core::floor32 ( Game->GammaValue * 100.f ) );
    gui.Gamma->setToolTipText ( L"Adjust Gamma Ramp ( 0.5 - 3.5)" );
    Game->Device->setGammaRamp ( Game->GammaValue, Game->GammaValue, Game->GammaValue, 0.f, 0.f );


    env->addStaticText ( L"Tesselation:", rect<s32>( dim.Width - 400, 124, dim.Width - 310, 140 ),false, false, gui.Window, -1, false );
    gui.Tesselation = env->addScrollBar( true, rect<s32>( dim.Width - 300, 124, dim.Width - 10, 140 ), gui.Window,-1 );
    gui.Tesselation->setMin ( 2 );
    gui.Tesselation->setMax ( 12 );
    gui.Tesselation->setSmallStep ( 1 );
    gui.Tesselation->setLargeStep ( 1 );
    gui.Tesselation->setPos ( Game->loadParam.patchTesselation );
    gui.Tesselation->setToolTipText ( L"How smooth should curved surfaces be rendered" );

    gui.Collision = env->addCheckBox ( true, rect<s32>( dim.Width - 400, 150, dim.Width - 300, 166 ), gui.Window,-1, L"Collision" );
    gui.Collision->setToolTipText ( L"Set collision on or off ( flythrough ). \nPress F7 on your Keyboard" );
    gui.Visible_Map = env->addCheckBox ( true, rect<s32>( dim.Width - 300, 150, dim.Width - 240, 166 ), gui.Window,-1, L"Map" );
    gui.Visible_Map->setToolTipText ( L"Show or not show the static part the Level. \nPress F3 on your Keyboard" );
    gui.Visible_Shader = env->addCheckBox ( true, rect<s32>( dim.Width - 240, 150, dim.Width - 170, 166 ), gui.Window,-1, L"Shader" );
    gui.Visible_Shader->setToolTipText ( L"Show or not show the Shader Nodes. \nPress F4 on your Keyboard" );
    gui.Visible_Fog = env->addCheckBox ( true, rect<s32>( dim.Width - 170, 150, dim.Width - 110, 166 ), gui.Window,-1, L"Fog" );
    gui.Visible_Fog->setToolTipText ( L"Show or not show the Fog Nodes. \nPress F5 on your Keyboard" );
    gui.Visible_Unresolved = env->addCheckBox ( true, rect<s32>( dim.Width - 110, 150, dim.Width - 10, 166 ), gui.Window,-1, L"Unresolved" );
    gui.Visible_Unresolved->setToolTipText ( L"Show the or not show the Nodes the Engine can't handle. \nPress F6 on your Keyboard" );
    gui.Visible_Skydome = env->addCheckBox ( true, rect<s32>( dim.Width - 110, 180, dim.Width - 10, 196 ), gui.Window,-1, L"Skydome" );
    gui.Visible_Skydome->setToolTipText ( L"Show the or not show the Skydome." );

    //Respawn = env->addButton ( rect<s32>( dim.Width - 260, 90, dim.Width - 10, 106 ), 0,-1, L"Respawn" );

    env->addStaticText ( L"Archives:", rect<s32>( 5, dim.Height - 530, dim.Width - 600,dim.Height - 514 ),false, false, gui.Window, -1, false );

    gui.ArchiveAdd = env->addButton ( rect<s32>( dim.Width - 725, dim.Height - 530, dim.Width - 665, dim.Height - 514 ), gui.Window,-1, L"add" );
    gui.ArchiveAdd->setToolTipText ( L"Add an archive, usually packed zip-archives (*.pk3) to the Filesystem" );
    gui.ArchiveRemove = env->addButton ( rect<s32>( dim.Width - 660, dim.Height - 530, dim.Width - 600, dim.Height - 514 ), gui.Window,-1, L"del" );
    gui.ArchiveRemove->setToolTipText ( L"Remove the selected archive from the FileSystem." );
    gui.ArchiveUp = env->addButton ( rect<s32>( dim.Width - 575, dim.Height - 530, dim.Width - 515, dim.Height - 514 ), gui.Window,-1, L"up" );
    gui.ArchiveUp->setToolTipText ( L"Arrange Archive Look-up Hirachy. Move the selected Archive up" );
    gui.ArchiveDown = env->addButton ( rect<s32>( dim.Width - 510, dim.Height - 530, dim.Width - 440, dim.Height - 514 ), gui.Window,-1, L"down" );
    gui.ArchiveDown->setToolTipText ( L"Arrange Archive Look-up Hirachy. Move the selected Archive down" );


    gui.ArchiveList = env->addTable ( rect<s32>( 5,dim.Height - 510, dim.Width - 450,dim.Height - 410 ), gui.Window  );
    gui.ArchiveList->addColumn ( L"Type", 0 );
    gui.ArchiveList->addColumn ( L"Real File Path", 1 );
    gui.ArchiveList->setColumnWidth ( 0, 60 );
    gui.ArchiveList->setColumnWidth ( 1, 284 );
    gui.ArchiveList->setToolTipText ( L"Show the attached Archives" );


    env->addStaticText ( L"Maps:", rect<s32>( 5, dim.Height - 400, dim.Width - 450,dim.Height - 380 ),false, false, gui.Window, -1, false );
    gui.MapList = env->addListBox ( rect<s32>( 5,dim.Height - 380, dim.Width - 450,dim.Height - 40  ), gui.Window, -1, true  );
    gui.MapList->setToolTipText ( L"Show the current Maps in all Archives.\n Double-Click the Map to start the level" );


    // create a visible Scene Tree
    env->addStaticText ( L"Scenegraph:", rect<s32>( dim.Width - 400, dim.Height - 400, dim.Width - 5,dim.Height - 380 ),false, false, gui.Window, -1, false );
    gui.SceneTree = env->addTreeView(   rect<s32>( dim.Width - 400, dim.Height - 380, dim.Width - 5, dim.Height - 40 ),
                                    gui.Window, -1, true, true, false );
    gui.SceneTree->setToolTipText ( L"Show the current Scenegraph" );
    gui.SceneTree->getRoot()->clearChildren();
    addSceneTreeItem ( Game->Device->getSceneManager()->getRootSceneNode(), gui.SceneTree->getRoot() );


    IGUIImageList* imageList = env->createImageList(    driver->getTexture ( "iconlist.png" ),
                                        dimension2di( 32, 32 ), true );

    if ( imageList )
    {
        gui.SceneTree->setImageList( imageList );
        imageList->drop ();
    }


    // load the engine logo
    gui.Logo = env->addImage( driver->getTexture("irrlichtlogo3.png"), position2d<s32>(5, 16 ), true, 0 );
    gui.Logo->setToolTipText ( L"The great Irrlicht Engine" );

    AddArchive ( "" );
}

Add an Archive to the FileSystems and updates the GUI

void CQuake3EventHandler::AddArchive ( const path& archiveName )
{
    IFileSystem *fs = Game->Device->getFileSystem();
    u32 i;

    if ( archiveName.size () )
    {
        bool exists = false;
        for ( i = 0; i != fs->getFileArchiveCount(); ++i )
        {
            if ( fs->getFileArchive(i)->getFileList()->getPath() == archiveName )
            {
                exists = true;
                break;
            }
        }

        if (!exists)
        {
            fs->addFileArchive(archiveName, true, false);
        }
    }

    // store the current archives in game data
    // show the attached Archive in proper order
    if ( gui.ArchiveList )
    {
        gui.ArchiveList->clearRows();

        for ( i = 0; i != fs->getFileArchiveCount(); ++i )
        {
            IFileArchive * archive = fs->getFileArchive ( i );

            u32 index = gui.ArchiveList->addRow(i);

            core::stringw typeName;
            switch(archive->getType())
            {
            case io::EFAT_ZIP:
                typeName = "ZIP";
                break;
            case io::EFAT_GZIP:
                typeName = "gzip";
                break;
            case io::EFAT_FOLDER:
                typeName = "Mount";
                break;
            case io::EFAT_PAK:
                typeName = "PAK";
                break;
            case io::EFAT_TAR:
                typeName = "TAR";
                break;
            default:
                typeName = "archive";
            }

            gui.ArchiveList->setCellText ( index, 0, typeName );
            gui.ArchiveList->setCellText ( index, 1, archive->getFileList()->getPath() );
        }
    }


    // browse the archives for maps
    if ( gui.MapList )
    {
        gui.MapList->clear();

        IGUISpriteBank *bank = Game->Device->getGUIEnvironment()->getSpriteBank("sprite_q3map");
        if ( 0 == bank )
            bank = Game->Device->getGUIEnvironment()->addEmptySpriteBank("sprite_q3map");

        SGUISprite sprite;
        SGUISpriteFrame frame;
        core::rect<s32> r;

        bank->getSprites().clear();
        bank->getPositions().clear ();
        gui.MapList->setSpriteBank ( bank );

        u32 g = 0;
        core::stringw s;

        // browse the attached file system
        fs->setFileListSystem ( FILESYSTEM_VIRTUAL );
        fs->changeWorkingDirectoryTo ( "/maps/" );
        IFileList *fileList = fs->createFileList ();
        fs->setFileListSystem ( FILESYSTEM_NATIVE );

        for ( i=0; i< fileList->getFileCount(); ++i)
        {
            s = fileList->getFullFileName(i);
            if ( s.find ( ".bsp" ) >= 0 )
            {
                // get level screenshot. reformat texture to 128x128
                path c ( s );
                deletePathFromFilename ( c );
                cutFilenameExtension ( c, c );
                c = path ( "levelshots/" ) + c;

                dimension2du dim ( 128, 128 );
                IVideoDriver * driver = Game->Device->getVideoDriver();
                IImage* image = 0;
                ITexture *tex = 0;
                path filename;

                filename = c + ".jpg";
                if ( fs->existFile ( filename ) )
                    image = driver->createImageFromFile( filename );
                if ( 0 == image )
                {
                    filename = c + ".tga";
                    if ( fs->existFile ( filename ) )
                        image = driver->createImageFromFile( filename );
                }

                if ( image )
                {
                    IImage* filter = driver->createImage ( video::ECF_R8G8B8, dim );
                    image->copyToScalingBoxFilter ( filter, 0 );
                    image->drop ();
                    image = filter;
                }

                if ( image )
                {
                    tex = driver->addTexture ( filename, image );
                    image->drop ();
                }


                bank->setTexture ( g, tex );

                r.LowerRightCorner.X = dim.Width;
                r.LowerRightCorner.Y = dim.Height;
                gui.MapList->setItemHeight ( r.LowerRightCorner.Y + 4 );
                frame.rectNumber = bank->getPositions().size();
                frame.textureNumber = g;

                bank->getPositions().push_back(r);

                sprite.Frames.set_used ( 0 );
                sprite.Frames.push_back(frame);
                sprite.frameTime = 0;
                bank->getSprites().push_back(sprite);

                gui.MapList->addItem ( s.c_str (), g );
                g += 1;
            }
        }
        fileList->drop ();

        gui.MapList->setSelected ( -1 );
        IGUIScrollBar * bar = (IGUIScrollBar*)gui.MapList->getElementFromId( 0 );
        if ( bar )
            bar->setPos ( 0 );

    }

}

clears the Map in Memory

void CQuake3EventHandler::dropMap ()
{
    IVideoDriver * driver = Game->Device->getVideoDriver();

    driver->removeAllHardwareBuffers ();
    driver->removeAllTextures ();

    Player[0].shutdown ();


    dropElement ( ItemParent );
    dropElement ( ShaderParent );
    dropElement ( UnresolvedParent );
    dropElement ( FogParent );
    dropElement ( BulletParent );


    Impacts.clear();

    if ( Meta )
    {
        Meta = 0;
    }

    dropElement ( MapParent );
    dropElement ( SkyNode );

    // clean out meshes, because textures are invalid
    // TODO: better texture handling;-)
    IMeshCache *cache = Game->Device->getSceneManager ()->getMeshCache();
    cache->clear ();
    Mesh = 0;
}

Load new map

void CQuake3EventHandler::LoadMap ( const stringw &mapName, s32 collision )
{
    if ( 0 == mapName.size() )
        return;

    dropMap ();

    IFileSystem *fs = Game->Device->getFileSystem();
    ISceneManager *smgr = Game->Device->getSceneManager ();

    IReadFile* file = fs->createMemoryReadFile(&Game->loadParam,
                sizeof(Game->loadParam), L"levelparameter.cfg", false);

    // load cfg file
    smgr->getMesh( file );
    file->drop ();

    // load the actual map
    Mesh = (IQ3LevelMesh*) smgr->getMesh(mapName);
    if ( 0 == Mesh )
        return;

add the geometry mesh to the Scene ( polygon & patches ) The Geometry mesh is optimised for faster drawing

IMesh *geometry = Mesh->getMesh(E_Q3_MESH_GEOMETRY);
if ( 0 == geometry || geometry->getMeshBufferCount() == 0)
    return;

Game->CurrentMapName = mapName;

//create a collision list
Meta = 0;

ITriangleSelector * selector = 0;
if (collision)
    Meta = smgr->createMetaTriangleSelector();

//IMeshBuffer *b0 = geometry->getMeshBuffer(0);
//s32 minimalNodes = b0 ? core::s32_max ( 2048, b0->getVertexCount() / 32 ) : 2048;
s32 minimalNodes = 2048;

MapParent = smgr->addOctreeSceneNode(geometry, 0, -1, minimalNodes);
MapParent->setName ( mapName );
if ( Meta )
{
    selector = smgr->createOctreeTriangleSelector( geometry,MapParent, minimalNodes);
    //selector = smgr->createTriangleSelector ( geometry, MapParent );
    Meta->addTriangleSelector( selector);
    selector->drop ();
}

// logical parent for the items
ItemParent = smgr->addEmptySceneNode();
if ( ItemParent )
    ItemParent->setName ( "Item Container" );

ShaderParent = smgr->addEmptySceneNode();
if ( ShaderParent )
    ShaderParent->setName ( "Shader Container" );

UnresolvedParent = smgr->addEmptySceneNode();
if ( UnresolvedParent )
    UnresolvedParent->setName ( "Unresolved Container" );

FogParent = smgr->addEmptySceneNode();
if ( FogParent )
    FogParent->setName ( "Fog Container" );

// logical parent for the bullets
BulletParent = smgr->addEmptySceneNode();
if ( BulletParent )
    BulletParent->setName ( "Bullet Container" );

now construct SceneNodes for each Shader The Objects are stored in the quake mesh E_Q3_MESH_ITEMS and the Shader ID is stored in the MaterialParameters mostly dark looking skulls and moving lava.. or green flashing tubes?

Q3ShaderFactory ( Game->loadParam, Game->Device, Mesh, E_Q3_MESH_ITEMS,ShaderParent, Meta, false );
Q3ShaderFactory ( Game->loadParam, Game->Device, Mesh, E_Q3_MESH_FOG,FogParent, 0, false );
Q3ShaderFactory ( Game->loadParam, Game->Device, Mesh, E_Q3_MESH_UNRESOLVED,UnresolvedParent, Meta, true );

Now construct Models from Entity List

    Q3ModelFactory ( Game->loadParam, Game->Device, Mesh, ItemParent, false );
}

Adds a SceneNode with an icon to the Scene Tree

void CQuake3EventHandler::addSceneTreeItem( ISceneNode * parent, IGUITreeViewNode* nodeParent)
{
    IGUITreeViewNode* node;
    wchar_t msg[128];

    s32 imageIndex;
    list<ISceneNode*>::ConstIterator it = parent->getChildren().begin();
    for (; it != parent->getChildren().end(); ++it)
    {
        switch ( (*it)->getType () )
        {
            case ESNT_Q3SHADER_SCENE_NODE: imageIndex = 0; break;
            case ESNT_CAMERA: imageIndex = 1; break;
            case ESNT_EMPTY: imageIndex = 2; break;
            case ESNT_MESH: imageIndex = 3; break;
            case ESNT_OCTREE: imageIndex = 3; break;
            case ESNT_ANIMATED_MESH: imageIndex = 4; break;
            case ESNT_SKY_BOX: imageIndex = 5; break;
            case ESNT_BILLBOARD: imageIndex = 6; break;
            case ESNT_PARTICLE_SYSTEM: imageIndex = 7; break;
            case ESNT_TEXT: imageIndex = 8; break;
            default:imageIndex = -1; break;
        }

        if ( imageIndex < 0 )
        {
            swprintf ( msg, 128, L"%hs,%hs",
                Game->Device->getSceneManager ()->getSceneNodeTypeName ( (*it)->getType () ),
                (*it)->getName()
                );
        }
        else
        {
            swprintf ( msg, 128, L"%hs",(*it)->getName() );
        }

        node = nodeParent->addChildBack( msg, 0, imageIndex );

        // Add all Animators
        list<ISceneNodeAnimator*>::ConstIterator ait = (*it)->getAnimators().begin();
        for (; ait != (*it)->getAnimators().end(); ++ait)
        {
            imageIndex = -1;
            swprintf ( msg, 128, L"%hs",
                Game->Device->getSceneManager ()->getAnimatorTypeName ( (*ait)->getType () )
                );

            switch ( (*ait)->getType () )
            {
                case ESNAT_FLY_CIRCLE:
                case ESNAT_FLY_STRAIGHT:
                case ESNAT_FOLLOW_SPLINE:
                case ESNAT_ROTATION:
                case ESNAT_TEXTURE:
                case ESNAT_DELETION:
                case ESNAT_COLLISION_RESPONSE:
                case ESNAT_CAMERA_FPS:
                case ESNAT_CAMERA_MAYA:
                default:
                    break;
            }
            node->addChildBack( msg, 0, imageIndex );
        }

        addSceneTreeItem ( *it, node );
    }
}


// Adds life!
void CQuake3EventHandler::CreatePlayers()
{
    Player[0].create ( Game->Device, Mesh, MapParent, Meta );
}


// Adds a skydome to the scene
void CQuake3EventHandler::AddSky( u32 dome, const c8 *texture)
{
    ISceneManager *smgr = Game->Device->getSceneManager ();
    IVideoDriver * driver = Game->Device->getVideoDriver();

    bool oldMipMapState = driver->getTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS);
    driver->setTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS, false);

    if ( 0 == dome )
    {
        // irrlicht order
        //static const c8*p[] = { "ft", "lf", "bk", "rt", "up", "dn" };
        // quake3 order
        static const c8*p[] = { "ft", "rt", "bk", "lf", "up", "dn" };

        u32 i = 0;
        snprintf ( buf, 64, "%s_%s.jpg", texture, p[i] );
        SkyNode = smgr->addSkyBoxSceneNode( driver->getTexture ( buf ), 0, 0, 0, 0, 0 );

        if (SkyNode)
        {
            for ( i = 0; i < 6; ++i )
            {
                snprintf ( buf, 64, "%s_%s.jpg", texture, p[i] );
                SkyNode->getMaterial(i).setTexture ( 0, driver->getTexture ( buf ) );
            }
        }
    }
    else
    if ( 1 == dome )
    {
        snprintf ( buf, 64, "%s.jpg", texture );
        SkyNode = smgr->addSkyDomeSceneNode(
                driver->getTexture( buf ), 32,32,
                1.f, 1.f, 1000.f, 0, 11);
    }
    else
    if ( 2 == dome )
    {
        snprintf ( buf, 64, "%s.jpg", texture );
        SkyNode = smgr->addSkyDomeSceneNode(
                driver->getTexture( buf ), 16,8,
                0.95f, 2.f, 1000.f, 0, 11);
    }

    if (SkyNode)
        SkyNode->setName("Skydome");
    //SkyNode->getMaterial(0).ZBuffer = video::EMDF_DEPTH_LESS_EQUAL;

    driver->setTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS, oldMipMapState);
}


// enable GUI elements
void CQuake3EventHandler::SetGUIActive( s32 command)
{
    bool inputState = false;

    ICameraSceneNode * camera = Game->Device->getSceneManager()->getActiveCamera ();

    switch ( command )
    {
        case 0: Game->guiActive = 0; inputState = !Game->guiActive; break;
        case 1: Game->guiActive = 1; inputState = !Game->guiActive;;break;
        case 2: Game->guiActive ^= 1; inputState = !Game->guiActive;break;
        case 3:
            if ( camera )
                inputState = !camera->isInputReceiverEnabled();
            break;
    }

    if ( camera )
    {
        camera->setInputReceiverEnabled ( inputState );
        Game->Device->getCursorControl()->setVisible( !inputState );
    }

    if ( gui.Window )
    {
        gui.Window->setVisible ( Game->guiActive != 0 );
    }

    if ( Game->guiActive &&
            gui.SceneTree && Game->Device->getGUIEnvironment()->getFocus() != gui.SceneTree
        )
    {
        gui.SceneTree->getRoot()->clearChildren();
        addSceneTreeItem ( Game->Device->getSceneManager()->getRootSceneNode(), gui.SceneTree->getRoot() );
    }

    Game->Device->getGUIEnvironment()->setFocus ( Game->guiActive ? gui.Window: 0 );
}

Handle game input

bool CQuake3EventHandler::OnEvent(const SEvent& eve)
{
    if ( eve.EventType == EET_LOG_TEXT_EVENT )
    {
        return false;
    }

    if ( Game->guiActive && eve.EventType == EET_GUI_EVENT )
    {
        if ( eve.GUIEvent.Caller == gui.MapList && eve.GUIEvent.EventType == gui::EGET_LISTBOX_SELECTED_AGAIN )
        {
            s32 selected = gui.MapList->getSelected();
            if ( selected >= 0 )
            {
                stringw loadMap = gui.MapList->getListItem ( selected );
                if ( 0 == MapParent || loadMap != Game->CurrentMapName )
                {
                    printf ( "Loading map %ls\n", loadMap.c_str() );
                    LoadMap ( loadMap , 1 );
                    if ( 0 == Game->loadParam.loadSkyShader )
                    {
                        AddSky ( 1, "skydome2" );
                    }
                    CreatePlayers ();
                    CreateGUI ();
                    SetGUIActive ( 0 );
                    return true;
                }
            }
        }
        else
        if ( eve.GUIEvent.Caller == gui.ArchiveRemove && eve.GUIEvent.EventType == gui::EGET_BUTTON_CLICKED )
        {
            Game->Device->getFileSystem()->removeFileArchive( gui.ArchiveList->getSelected() );
            Game->CurrentMapName = "";
            AddArchive ( "" );
        }
        else
        if ( eve.GUIEvent.Caller == gui.ArchiveAdd && eve.GUIEvent.EventType == gui::EGET_BUTTON_CLICKED )
        {
            if ( 0 == gui.ArchiveFileOpen )
            {
                Game->Device->getFileSystem()->setFileListSystem ( FILESYSTEM_NATIVE );
                gui.ArchiveFileOpen = Game->Device->getGUIEnvironment()->addFileOpenDialog ( L"Add Game Archive" , false,gui.Window  );
            }
        }
        else
        if ( eve.GUIEvent.Caller == gui.ArchiveFileOpen && eve.GUIEvent.EventType == gui::EGET_FILE_SELECTED )
        {
            AddArchive ( gui.ArchiveFileOpen->getFileName() );
            gui.ArchiveFileOpen = 0;
        }
        else
        if ( eve.GUIEvent.Caller == gui.ArchiveFileOpen && eve.GUIEvent.EventType == gui::EGET_DIRECTORY_SELECTED )
        {
            AddArchive ( gui.ArchiveFileOpen->getDirectoryName() );
        }
        else
        if ( eve.GUIEvent.Caller == gui.ArchiveFileOpen && eve.GUIEvent.EventType == gui::EGET_FILE_CHOOSE_DIALOG_CANCELLED )
        {
            gui.ArchiveFileOpen = 0;
        }
        else
        if ( ( eve.GUIEvent.Caller == gui.ArchiveUp || eve.GUIEvent.Caller == gui.ArchiveDown ) &&
            eve.GUIEvent.EventType == gui::EGET_BUTTON_CLICKED )
        {
            s32 rel = eve.GUIEvent.Caller == gui.ArchiveUp ? -1 : 1;
            if ( Game->Device->getFileSystem()->moveFileArchive ( gui.ArchiveList->getSelected (), rel ) )
            {
                s32 newIndex = core::s32_clamp ( gui.ArchiveList->getSelected() + rel, 0, gui.ArchiveList->getRowCount() - 1 );
                AddArchive ( "" );
                gui.ArchiveList->setSelected ( newIndex );
                Game->CurrentMapName = "";
            }
        }
        else
        if ( eve.GUIEvent.Caller == gui.VideoDriver && eve.GUIEvent.EventType == gui::EGET_COMBO_BOX_CHANGED )
        {
            Game->deviceParam.DriverType = (E_DRIVER_TYPE) gui.VideoDriver->getItemData ( gui.VideoDriver->getSelected() );
        }
        else
        if ( eve.GUIEvent.Caller == gui.VideoMode && eve.GUIEvent.EventType == gui::EGET_COMBO_BOX_CHANGED )
        {
            u32 val = gui.VideoMode->getItemData ( gui.VideoMode->getSelected() );
            Game->deviceParam.WindowSize.Width = val >> 16;
            Game->deviceParam.WindowSize.Height = val & 0xFFFF;
        }
        else
        if ( eve.GUIEvent.Caller == gui.FullScreen && eve.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED )
        {
            Game->deviceParam.Fullscreen = gui.FullScreen->isChecked();
        }
        else
        if ( eve.GUIEvent.Caller == gui.Bit32 && eve.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED )
        {
            Game->deviceParam.Bits = gui.Bit32->isChecked() ? 32 : 16;
        }
        else
        if ( eve.GUIEvent.Caller == gui.MultiSample && eve.GUIEvent.EventType == gui::EGET_SCROLL_BAR_CHANGED )
        {
            Game->deviceParam.AntiAlias = gui.MultiSample->getPos();
        }
        else
        if ( eve.GUIEvent.Caller == gui.Tesselation && eve.GUIEvent.EventType == gui::EGET_SCROLL_BAR_CHANGED )
        {
            Game->loadParam.patchTesselation = gui.Tesselation->getPos ();
        }
        else
        if ( eve.GUIEvent.Caller == gui.Gamma && eve.GUIEvent.EventType == gui::EGET_SCROLL_BAR_CHANGED )
        {
            Game->GammaValue = gui.Gamma->getPos () * 0.01f;
            Game->Device->setGammaRamp ( Game->GammaValue, Game->GammaValue, Game->GammaValue, 0.f, 0.f );
        }
        else
        if ( eve.GUIEvent.Caller == gui.SetVideoMode && eve.GUIEvent.EventType == gui::EGET_BUTTON_CLICKED )
        {
            Game->retVal = 2;
            Game->Device->closeDevice();
        }
        else
        if ( eve.GUIEvent.Caller == gui.Window && eve.GUIEvent.EventType == gui::EGET_ELEMENT_CLOSED )
        {
            Game->Device->closeDevice();
        }
        else
        if ( eve.GUIEvent.Caller == gui.Collision && eve.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED )
        {
            // set fly through active
            Game->flyTroughState ^= 1;
            Player[0].cam()->setAnimateTarget ( Game->flyTroughState == 0 );

            printf ( "collision %d\n", Game->flyTroughState == 0 );
        }
        else
        if ( eve.GUIEvent.Caller == gui.Visible_Map && eve.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED )
        {
            bool v = gui.Visible_Map->isChecked();

            if ( MapParent )
            {
                printf ( "static node set visible %d\n",v );
                MapParent->setVisible ( v );
            }
        }
        else
        if ( eve.GUIEvent.Caller == gui.Visible_Shader && eve.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED )
        {
            bool v = gui.Visible_Shader->isChecked();

            if ( ShaderParent )
            {
                printf ( "shader node set visible %d\n",v );
                ShaderParent->setVisible ( v );
            }
        }
        else
        if ( eve.GUIEvent.Caller == gui.Visible_Skydome && eve.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED )
        {
            if ( SkyNode )
            {
                bool v = !SkyNode->isVisible();
                printf ( "skynode set visible %d\n",v );
                SkyNode->setVisible ( v );
            }
        }
        else
        if ( eve.GUIEvent.Caller == gui.Respawn && eve.GUIEvent.EventType == gui::EGET_BUTTON_CLICKED )
        {
            Player[0].respawn ();
        }

        return false;
    }

    // fire
    if ((eve.EventType == EET_KEY_INPUT_EVENT && eve.KeyInput.Key == KEY_SPACE &&
        eve.KeyInput.PressedDown == false) ||
        (eve.EventType == EET_MOUSE_INPUT_EVENT && eve.MouseInput.Event == EMIE_LMOUSE_LEFT_UP)
        )
    {
        ICameraSceneNode * camera = Game->Device->getSceneManager()->getActiveCamera ();
        if ( camera && camera->isInputReceiverEnabled () )
        {
            useItem( Player + 0 );
        }
    }

    // gui active
    if ((eve.EventType == EET_KEY_INPUT_EVENT && eve.KeyInput.Key == KEY_F1 &&
        eve.KeyInput.PressedDown == false) ||
        (eve.EventType == EET_MOUSE_INPUT_EVENT && eve.MouseInput.Event == EMIE_RMOUSE_LEFT_UP)
        )
    {
        SetGUIActive ( 2 );
    }

    // check if user presses the key
    if ( eve.EventType == EET_KEY_INPUT_EVENT && eve.KeyInput.PressedDown == false)
    {
        // Escape toggles camera Input
        if ( eve.KeyInput.Key == irr::KEY_ESCAPE )
        {
            SetGUIActive ( 3 );
        }
        else
        if (eve.KeyInput.Key == KEY_F11)
        {
            // screenshot are taken without gamma!
            IImage* image = Game->Device->getVideoDriver()->createScreenShot();
            if (image)
            {
                core::vector3df pos;
                core::vector3df rot;
                ICameraSceneNode * cam = Game->Device->getSceneManager()->getActiveCamera ();
                if ( cam )
                {
                    pos = cam->getPosition ();
                    rot = cam->getRotation ();
                }

                static const c8 *dName[] = { "null", "software", "burning",
                    "d3d8", "d3d9", "opengl" };

                snprintf(buf, 256, "%s_%ls_%.0f_%.0f_%.0f_%.0f_%.0f_%.0f.jpg",
                        dName[Game->Device->getVideoDriver()->getDriverType()],
                        Game->CurrentMapName.c_str(),
                        pos.X, pos.Y, pos.Z,
                        rot.X, rot.Y, rot.Z
                        );
                path filename ( buf );
                filename.replace ( '/', '_' );
                printf ( "screenshot : %s\n", filename.c_str() );
                Game->Device->getVideoDriver()->writeImageToFile(image, filename, 100 );
                image->drop();
            }
        }
        else
        if (eve.KeyInput.Key == KEY_F9)
        {
            s32 value = EDS_OFF;

            Game->debugState = ( Game->debugState + 1 ) & 3;

            switch ( Game->debugState )
            {
                case 1: value = EDS_NORMALS | EDS_MESH_WIRE_OVERLAY | EDS_BBOX_ALL; break;
                case 2: value = EDS_NORMALS | EDS_MESH_WIRE_OVERLAY | EDS_SKELETON; break;
            }

set debug map data on/off debugState = debugState == EDS_OFF ? EDS_NORMALS | EDS_MESH_WIRE_OVERLAY | EDS_BBOX_ALL: EDS_OFF;

            if ( ItemParent )
            {
                list<ISceneNode*>::ConstIterator it = ItemParent->getChildren().begin();
                for (; it != ItemParent->getChildren().end(); ++it)
                {
                    (*it)->setDebugDataVisible ( value );
                }
            }

            if ( ShaderParent )
            {
                list<ISceneNode*>::ConstIterator it = ShaderParent->getChildren().begin();
                for (; it != ShaderParent->getChildren().end(); ++it)
                {
                    (*it)->setDebugDataVisible ( value );
                }
            }

            if ( UnresolvedParent )
            {
                list<ISceneNode*>::ConstIterator it = UnresolvedParent->getChildren().begin();
                for (; it != UnresolvedParent->getChildren().end(); ++it)
                {
                    (*it)->setDebugDataVisible ( value );
                }
            }

            if ( FogParent )
            {
                list<ISceneNode*>::ConstIterator it = FogParent->getChildren().begin();
                for (; it != FogParent->getChildren().end(); ++it)
                {
                    (*it)->setDebugDataVisible ( value );
                }
            }

            if ( SkyNode )
            {
                SkyNode->setDebugDataVisible ( value );
            }

        }
        else
        if (eve.KeyInput.Key == KEY_F8)
        {
            // set gravity on/off
            Game->gravityState ^= 1;
            Player[0].cam()->setGravity ( getGravity ( Game->gravityState ? "earth" : "none" ) );
            printf ( "gravity %s\n", Game->gravityState ? "earth" : "none" );
        }
        else
        if (eve.KeyInput.Key == KEY_F7)
        {
            // set fly through active
            Game->flyTroughState ^= 1;
            Player[0].cam()->setAnimateTarget ( Game->flyTroughState == 0 );
            if ( gui.Collision )
                gui.Collision->setChecked ( Game->flyTroughState == 0 );

            printf ( "collision %d\n", Game->flyTroughState == 0 );
        }
        else
        if (eve.KeyInput.Key == KEY_F2)
        {
            Player[0].respawn ();
        }
        else
        if (eve.KeyInput.Key == KEY_F3)
        {
            if ( MapParent )
            {
                bool v = !MapParent->isVisible ();
                printf ( "static node set visible %d\n",v );
                MapParent->setVisible ( v );
                if ( gui.Visible_Map )
                    gui.Visible_Map->setChecked ( v );
            }
        }
        else
        if (eve.KeyInput.Key == KEY_F4)
        {
            if ( ShaderParent )
            {
                bool v = !ShaderParent->isVisible ();
                printf ( "shader node set visible %d\n",v );
                ShaderParent->setVisible ( v );
                if ( gui.Visible_Shader )
                    gui.Visible_Shader->setChecked ( v );
            }
        }
        else
        if (eve.KeyInput.Key == KEY_F5)
        {
            if ( FogParent )
            {
                bool v = !FogParent->isVisible ();
                printf ( "fog node set visible %d\n",v );
                FogParent->setVisible ( v );
                if ( gui.Visible_Fog )
                    gui.Visible_Fog->setChecked ( v );
            }

        }
        else
        if (eve.KeyInput.Key == KEY_F6)
        {
            if ( UnresolvedParent )
            {
                bool v = !UnresolvedParent->isVisible ();
                printf ( "unresolved node set visible %d\n",v );
                UnresolvedParent->setVisible ( v );
                if ( gui.Visible_Unresolved )
                    gui.Visible_Unresolved->setChecked ( v );
            }
        }
    }

    // check if user presses the key C ( for crouch)
    if ( eve.EventType == EET_KEY_INPUT_EVENT && eve.KeyInput.Key == KEY_KEY_C )
    {
        // crouch
        ISceneNodeAnimatorCollisionResponse *anim = Player[0].cam ();
        if ( anim && 0 == Game->flyTroughState )
        {
            if ( false == eve.KeyInput.PressedDown )
            {
                // stand up
                anim->setEllipsoidRadius (  vector3df(30,45,30) );
                anim->setEllipsoidTranslation ( vector3df(0,40,0));

            }
            else
            {
                // on your knees
                anim->setEllipsoidRadius (  vector3df(30,20,30) );
                anim->setEllipsoidTranslation ( vector3df(0,20,0));
            }
            return true;
        }
    }
    return false;
}

useItem

void CQuake3EventHandler::useItem( Q3Player * player)
{
    ISceneManager* smgr = Game->Device->getSceneManager();
    ICameraSceneNode* camera = smgr->getActiveCamera();

    if (!camera)
        return;

    SParticleImpact imp;
    imp.when = 0;

    // get line of camera

    vector3df start = camera->getPosition();

    if ( player->WeaponNode )
    {
        start.X += 0.f;
        start.Y += 0.f;
        start.Z += 0.f;
    }

    vector3df end = (camera->getTarget() - start);
    end.normalize();
    start += end*20.0f;

    end = start + (end * camera->getFarValue());

    triangle3df triangle;
    line3d<f32> line(start, end);

    // get intersection point with map
    scene::ISceneNode* hitNode;
    if (smgr->getSceneCollisionManager()->getCollisionPoint(
        line, Meta, end, triangle,hitNode))
    {
        // collides with wall
        vector3df out = triangle.getNormal();
        out.setLength(0.03f);

        imp.when = 1;
        imp.outVector = out;
        imp.pos = end;

        player->setAnim ( "pow" );
        player->Anim[1].next += player->Anim[1].delta;
    }
    else
    {
        // doesnt collide with wall
        vector3df start = camera->getPosition();
        if ( player->WeaponNode )
        {
            //start.X += 10.f;
            //start.Y += -5.f;
            //start.Z += 1.f;
        }

        vector3df end = (camera->getTarget() - start);
        end.normalize();
        start += end*20.0f;
        end = start + (end * camera->getFarValue());
    }

    // create fire ball
    ISceneNode* node = 0;
    node = smgr->addBillboardSceneNode( BulletParent,dimension2d<f32>(10,10), start);

    node->setMaterialFlag(EMF_LIGHTING, false);
    node->setMaterialTexture(0, Game->Device->getVideoDriver()->getTexture("fireball.bmp"));
    node->setMaterialFlag(video::EMF_ZWRITE_ENABLE, false);
    node->setMaterialType(EMT_TRANSPARENT_ADD_COLOR);

    f32 length = (f32)(end - start).getLength();
    const f32 speed = 5.8f;
    u32 time = (u32)(length / speed);

    ISceneNodeAnimator* anim = 0;

    // set flight line

    anim = smgr->createFlyStraightAnimator(start, end, time);
    node->addAnimator(anim);
    anim->drop();

    snprintf ( buf, 64, "bullet: %s on %.1f,%1.f,%1.f",
                imp.when ? "hit" : "nohit", end.X, end.Y, end.Z );
    node->setName ( buf );


    anim = smgr->createDeleteAnimator(time);
    node->addAnimator(anim);
    anim->drop();

    if (imp.when)
    {
        // create impact note
        imp.when = Game->Device->getTimer()->getTime() +
            (time + (s32) ( ( 1.f + Noiser::get() ) * 250.f ));
        Impacts.push_back(imp);
    }

    // play sound
}

// rendered when bullets hit something
void CQuake3EventHandler::createParticleImpacts( u32 now )
{
    ISceneManager* sm = Game->Device->getSceneManager();

    struct smokeLayer
    {
        const c8 * texture;
        f32 scale;
        f32 minparticleSize;
        f32 maxparticleSize;
        f32 boxSize;
        u32 minParticle;
        u32 maxParticle;
        u32 fadeout;
        u32 lifetime;
    };

    smokeLayer smoke[] =
    {
        { "smoke2.jpg", 0.4f, 1.5f, 18.f, 20.f, 20, 50, 2000, 10000 },
        { "smoke3.jpg", 0.2f, 1.2f, 15.f, 20.f, 10, 30, 1000, 12000 }
    };


    u32 i;
    u32 g;
    s32 factor = 1;
    for ( g = 0; g != 2; ++g )
    {
        smoke[g].minParticle *= factor;
        smoke[g].maxParticle *= factor;
        smoke[g].lifetime *= factor;
        smoke[g].boxSize *= Noiser::get() * 0.5f;
    }

    for ( i=0; i < Impacts.size(); ++i)
    {
        if (now < Impacts[i].when)
            continue;

        // create smoke particle system
        IParticleSystemSceneNode* pas = 0;

        for ( g = 0; g != 2; ++g )
        {
            pas = sm->addParticleSystemSceneNode(false, BulletParent, -1, Impacts[i].pos);

            snprintf ( buf, 64, "bullet impact smoke at %.1f,%.1f,%1.f",
                Impacts[i].pos.X,Impacts[i].pos.Y,Impacts[i].pos.Z);
            pas->setName ( buf );

            // create a flat smoke
            vector3df direction = Impacts[i].outVector;
            direction *= smoke[g].scale;
            IParticleEmitter* em = pas->createBoxEmitter(
                aabbox3d<f32>(-4.f,0.f,-4.f,20.f,smoke[g].minparticleSize,20.f),
                direction,smoke[g].minParticle, smoke[g].maxParticle,
                video::SColor(0,0,0,0),video::SColor(0,128,128,128),
                250,4000, 60);

            em->setMinStartSize (dimension2d<f32>( smoke[g].minparticleSize, smoke[g].minparticleSize));
            em->setMaxStartSize (dimension2d<f32>( smoke[g].maxparticleSize, smoke[g].maxparticleSize));

            pas->setEmitter(em);
            em->drop();

            // particles get invisible
            IParticleAffector* paf = pas->createFadeOutParticleAffector(
                video::SColor ( 0, 0, 0, 0 ), smoke[g].fadeout);
            pas->addAffector(paf);
            paf->drop();

            // particle system life time
            ISceneNodeAnimator* anim = sm->createDeleteAnimator( smoke[g].lifetime);
            pas->addAnimator(anim);
            anim->drop();

            pas->setMaterialFlag(video::EMF_LIGHTING, false);
            pas->setMaterialFlag(video::EMF_ZWRITE_ENABLE, false);
            pas->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR );
            pas->setMaterialTexture(0, Game->Device->getVideoDriver()->getTexture( smoke[g].texture ));
        }


        // play impact sound
        #ifdef USE_IRRKLANG

if (irrKlang) { audio::ISound* sound = irrKlang->play3D(impactSound, Impacts[i].pos, false, false, true);

if (sound) { adjust max value a bit to make to sound of an impact louder sound->setMinDistance(400); sound->drop(); } }

        #endif


        // delete entry
        Impacts.erase(i);
        i--;
    }
}

render

void CQuake3EventHandler::Render()
{
    IVideoDriver * driver = Game->Device->getVideoDriver();
    if ( 0 == driver )
        return;

    // TODO: This does not work, yet.
    const bool anaglyph=false;
    if (anaglyph)
    {
        scene::ICameraSceneNode* cameraOld = Game->Device->getSceneManager()->getActiveCamera();
        driver->beginScene(true, true, SColor(0,0,0,0));
        driver->getOverrideMaterial().Material.ColorMask = ECP_NONE;
        driver->getOverrideMaterial().EnableFlags  = EMF_COLOR_MASK;
        driver->getOverrideMaterial().EnablePasses = ESNRP_SKY_BOX +
                                                     ESNRP_SOLID +
                                                     ESNRP_TRANSPARENT +
                                                     ESNRP_TRANSPARENT_EFFECT +
                                                     ESNRP_SHADOW;
        Game->Device->getSceneManager()->drawAll();
        driver->clearZBuffer();

        const vector3df oldPosition = cameraOld->getPosition();
        const vector3df oldTarget   = cameraOld->getTarget();
        const matrix4 startMatrix   = cameraOld->getAbsoluteTransformation();
        const vector3df focusPoint  = (oldTarget -
                cameraOld->getAbsolutePosition()).setLength(10000) +
                cameraOld->getAbsolutePosition() ;

        scene::ICameraSceneNode* camera = cameraOld;//Game->Device->getSceneManager()->addCameraSceneNode();

        //Left eye...
        vector3df pos;
        matrix4   move;

        move.setTranslation( vector3df(-1.5f,0.0f,0.0f) );
        pos=(startMatrix*move).getTranslation();

        driver->getOverrideMaterial().Material.ColorMask = ECP_RED;
        driver->getOverrideMaterial().EnableFlags  = EMF_COLOR_MASK;
        driver->getOverrideMaterial().EnablePasses =
                ESNRP_SKY_BOX|ESNRP_SOLID|ESNRP_TRANSPARENT|
                ESNRP_TRANSPARENT_EFFECT|ESNRP_SHADOW;

        camera->setPosition(pos);
        camera->setTarget(focusPoint);

        Game->Device->getSceneManager()->drawAll();
        driver->clearZBuffer();

        //Right eye...
        move.setTranslation( vector3df(1.5f,0.0f,0.0f) );
        pos=(startMatrix*move).getTranslation();

        driver->getOverrideMaterial().Material.ColorMask = ECP_GREEN + ECP_BLUE;
        driver->getOverrideMaterial().EnableFlags  = EMF_COLOR_MASK;
        driver->getOverrideMaterial().EnablePasses =
                ESNRP_SKY_BOX|ESNRP_SOLID|ESNRP_TRANSPARENT|
                ESNRP_TRANSPARENT_EFFECT|ESNRP_SHADOW;

        camera->setPosition(pos);
        camera->setTarget(focusPoint);

        Game->Device->getSceneManager()->drawAll();

        driver->getOverrideMaterial().Material.ColorMask=ECP_ALL;
        driver->getOverrideMaterial().EnableFlags=0;
        driver->getOverrideMaterial().EnablePasses=0;

        if (camera != cameraOld)
        {
            Game->Device->getSceneManager()->setActiveCamera(cameraOld);
            camera->remove();
        }
        else
        {
            camera->setPosition(oldPosition);
            camera->setTarget(oldTarget);
        }
    }
    else
    {
        driver->beginScene(true, true, SColor(0,0,0,0));
        Game->Device->getSceneManager()->drawAll();
    }
    Game->Device->getGUIEnvironment()->drawAll();
    driver->endScene();
}

update the generic scene node

void CQuake3EventHandler::Animate()
{
    u32 now = Game->Device->getTimer()->getTime();

    Q3Player * player = Player + 0;

    checkTimeFire ( player->Anim, 4, now );

    // Query Scene Manager attributes
    if ( player->Anim[0].flags & FIRED )
    {
        ISceneManager *smgr = Game->Device->getSceneManager ();
        wchar_t msg[128];
        IVideoDriver * driver = Game->Device->getVideoDriver();

        IAttributes * attr = smgr->getParameters();
#ifdef _IRR_SCENEMANAGER_DEBUG                  
        swprintf ( msg, 128,
            L"Q3 %s [%ls], FPS:%03d Tri:%.03fm Cull %d/%d nodes (%d,%d,%d)",
            Game->CurrentMapName.c_str(),
            driver->getName(),
            driver->getFPS (),
            (f32) driver->getPrimitiveCountDrawn( 0 ) * ( 1.f / 1000000.f ),
            attr->getAttributeAsInt ( "culled" ),
            attr->getAttributeAsInt ( "calls" ),
            attr->getAttributeAsInt ( "drawn_solid" ),
            attr->getAttributeAsInt ( "drawn_transparent" ),
            attr->getAttributeAsInt ( "drawn_transparent_effect" )
            );
#else
swprintf ( msg, 128,
            L"Q3 %s [%ls], FPS:%03d Tri:%.03fm",
            Game->CurrentMapName.c_str(),
            driver->getName(),
            driver->getFPS (),
            (f32) driver->getPrimitiveCountDrawn( 0 ) * ( 1.f / 1000000.f )
            );      
#endif      
        Game->Device->setWindowCaption( msg );

        swprintf ( msg, 128,
                    L"%03d fps, F1 GUI on/off, F2 respawn, F3-F6 toggle Nodes, F7 Collision on/off"
                    L", F8 Gravity on/off, Right Mouse Toggle GUI",
                    Game->Device->getVideoDriver()->getFPS ()
                );
        if ( gui.StatusLine )
            gui.StatusLine->setText ( msg );
        player->Anim[0].flags &= ~FIRED;
    }

    // idle..
    if ( player->Anim[1].flags & FIRED )
    {
        if ( strcmp ( player->animation, "idle" ) )
            player->setAnim ( "idle" );

        player->Anim[1].flags &= ~FIRED;
    }

    createParticleImpacts ( now );

}

The main game states

void runGame ( GameData *game )
{
    if ( game->retVal >= 3 )
        return;

    game->Device = (*game->createExDevice) ( game->deviceParam );
    if ( 0 == game->Device)
    {
        // could not create selected driver.
        game->retVal = 0;
        return;
    }

    // create an event receiver based on current game data
    CQuake3EventHandler *eventHandler = new CQuake3EventHandler( game );

    // load stored config
    game->load ( "explorer.cfg" );

    // add our media directory and archive to the file system
    for ( u32 i = 0; i < game->CurrentArchiveList.size(); ++i )
    {
        eventHandler->AddArchive ( game->CurrentArchiveList[i] );
    }

    // Load a Map or startup to the GUI
    if ( game->CurrentMapName.size () )
    {
        eventHandler->LoadMap ( game->CurrentMapName, 1 );
        if ( 0 == game->loadParam.loadSkyShader )
            eventHandler->AddSky ( 1, "skydome2" );
        eventHandler->CreatePlayers ();
        eventHandler->CreateGUI ();
        eventHandler->SetGUIActive ( 0 );

        // set player to last position on restart
        if ( game->retVal == 2 )
        {
            eventHandler->GetPlayer( 0 )->setpos ( game->PlayerPosition, game->PlayerRotation );
        }
    }
    else
    {
        // start up empty
        eventHandler->AddSky ( 1, "skydome2" );
        eventHandler->CreatePlayers ();
        eventHandler->CreateGUI ();
        eventHandler->SetGUIActive ( 1 );
        background_music ( "IrrlichtTheme.ogg" );
    }


    game->retVal = 3;
    while( game->Device->run() )
    {
        eventHandler->Animate ();
        eventHandler->Render ();
        //if ( !game->Device->isWindowActive() )
            game->Device->yield();
    }

    game->Device->setGammaRamp ( 1.f, 1.f, 1.f, 0.f, 0.f );
    delete eventHandler;
}

#if defined (_IRR_WINDOWS_) && 0
    #pragma comment(linker, "/subsystem:windows /ENTRY:mainCRTStartup")
#endif

The main routine, doing all setup

int IRRCALLCONV main(int argc, char* argv[])
{
    path prgname(argv[0]);
    GameData game ( deletePathFromPath ( prgname, 1 ) );

    // dynamically load irrlicht
    const c8 * dllName = argc > 1 ? argv[1] : "irrlicht.dll";
    game.createExDevice = load_createDeviceEx ( dllName );
    if ( 0 == game.createExDevice )
    {
        game.retVal = 3;
        printf ( "Could not load %s.\n", dllName );
        return game.retVal; // could not load dll
    }

    // start without asking for driver
    game.retVal = 1;
    do
    {
        // if driver could not created, ask for another driver
        if ( game.retVal == 0 )
        {
            game.setDefault ();
            // ask user for driver
            game.deviceParam.DriverType=driverChoiceConsole();
            if (game.deviceParam.DriverType==video::EDT_COUNT)
                game.retVal = 3;
        }
        runGame ( &game );
    } while ( game.retVal < 3 );

    return game.retVal;
}