milek7/sim branch network code import

2026-07-22 22:09:19 +02:00 · 2020-02-16 03:03:17 +01:00
parent 2ce3091e8f
commit 7a0c89f508
56 changed files with 2609 additions and 426 deletions
--- a/Classes.h
+++ b/Classes.h
@@ -40,6 +40,7 @@ class memory_table;
 class powergridsource_table;
 class instance_table;
 class vehicle_table;
+class train_table;
 struct light_array;
 class particle_manager;
 struct dictionary_source;
@@ -77,4 +78,8 @@ enum class TCommandType
 using material_handle = int;
 using texture_handle = int;

+struct invalid_scenery_exception : std::runtime_error {
+	invalid_scenery_exception() : std::runtime_error("cannot load scenery") {}
+};
+
 #endif
--- a/Driver.cpp
+++ b/Driver.cpp
@@ -1862,11 +1862,9 @@ void TController::Activation()
        }
        if (pVehicle != old)
        { // jeśli zmieniony został pojazd prowadzony
-            if( ( simulation::Train )
-             && ( simulation::Train->Dynamic() == old ) ) {
-                // ewentualna zmiana kabiny użytkownikowi
-                Global.changeDynObj = pVehicle; // uruchomienie protezy
-            }
+			TTrain *train = simulation::Trains.find(old->name());
+			if (train)
+				train->MoveToVehicle(pVehicle);
            ControllingSet(); // utworzenie połączenia do sterowanego pojazdu (może się zmienić) - silnikowy dla EZT
        }
        if( mvControlling->EngineType == TEngineType::DieselEngine ) {
--- a/DynObj.cpp
+++ b/DynObj.cpp
@@ -1615,6 +1615,36 @@ TDynamicObject::~TDynamicObject() {
    SafeDeleteArray( pAnimated ); // lista animowanych submodeli
 }

+void TDynamicObject::place_on_track(TTrack *Track, double fDist, bool Reversed)
+{
+	for( auto &axle : m_axlesounds ) {
+		// wyszukiwanie osi (0 jest na końcu, dlatego dodajemy długość?)
+		axle.distance = (
+		    Reversed ?
+		         -axle.offset :
+		        ( axle.offset + MoverParameters->Dim.L ) ) + fDist;
+	}
+	double fAxleDistHalf = fAxleDist * 0.5;
+	// przesuwanie pojazdu tak, aby jego początek był we wskazanym miejcu
+	fDist -= 0.5 * MoverParameters->Dim.L; // dodajemy pół długości pojazdu, bo ustawiamy jego środek (zliczanie na minus)
+	switch (iNumAxles) {
+	    // Ra: pojazdy wstawiane są na tor początkowy, a potem przesuwane
+	case 2: // ustawianie osi na torze
+		Axle0.Init(Track, this, iDirection ? 1 : -1);
+		Axle0.Reset();
+		Axle0.Move((iDirection ? fDist : -fDist) + fAxleDistHalf, false);
+		Axle1.Init(Track, this, iDirection ? 1 : -1);
+		Axle1.Reset();
+		Axle1.Move((iDirection ? fDist : -fDist) - fAxleDistHalf, false); // false, żeby nie generować eventów
+		break;
+	}
+	// potrzebne do wyliczenia aktualnej pozycji; nie może być zero, bo nie przeliczy pozycji
+	// teraz jeszcze trzeba przypisać pojazdy do nowego toru, bo przesuwanie początkowe osi nie
+	// zrobiło tego
+	Move( 0.0001 );
+	ABuCheckMyTrack(); // zmiana toru na ten, co oś Axle0 (oś z przodu)
+}
+
 double
 TDynamicObject::Init(std::string Name, // nazwa pojazdu, np. "EU07-424"
                     std::string BaseDir, // z którego katalogu wczytany, np. "PKP/EU07"
@@ -2190,7 +2220,7 @@ TDynamicObject::create_controller( std::string const Type, bool const Trainset )

    if( Type == "" ) { return; }

-    if( asName == Global.asHumanCtrlVehicle ) {
+    if( asName == Global.local_start_vehicle ) {
        // jeśli pojazd wybrany do prowadzenia
        if( MoverParameters->EngineType != TEngineType::Dumb ) {
            // wsadzamy tam sterującego
@@ -6542,6 +6572,20 @@ glm::dvec3 TDynamicObject::get_future_movement() const {
    return m_future_movement;
 }

+void TDynamicObject::move_set(double distance)
+{
+	TDynamicObject *d = this;
+	while( d ) {
+		d->Move( distance * d->DirectionGet() );
+		d = d->Next(); // pozostałe też
+	    }
+	d = Prev();
+	while( d ) {
+		d->Move( distance * d->DirectionGet() );
+		d = d->Prev(); // w drugą stronę też
+	}
+}
+
 // returns type of the nearest functional power source present in the trainset
 TPowerSource
 TDynamicObject::ConnectedEnginePowerSource( TDynamicObject const *Caller ) const {
@@ -6640,13 +6684,13 @@ TDynamicObject::update_shake( double const Timedelta ) {

        auto shake { 1.25 * ShakeSpring.ComputateForces( shakevector, ShakeState.offset ) };

-        if( Random( iVel ) > 25.0 ) {
+        if( LocalRandom( iVel ) > 25.0 ) {
            // extra shake at increased velocity
            shake += ShakeSpring.ComputateForces(
                Math3D::vector3(
-                ( Random( iVel * 2 ) - iVel ) / ( ( iVel * 2 ) * 4 ) * BaseShake.jolt_scale.x,
-                ( Random( iVel * 2 ) - iVel ) / ( ( iVel * 2 ) * 4 ) * BaseShake.jolt_scale.y,
-                ( Random( iVel * 2 ) - iVel ) / ( ( iVel * 2 ) * 4 ) * BaseShake.jolt_scale.z )
+                ( LocalRandom( iVel * 2 ) - iVel ) / ( ( iVel * 2 ) * 4 ) * BaseShake.jolt_scale.x,
+                ( LocalRandom( iVel * 2 ) - iVel ) / ( ( iVel * 2 ) * 4 ) * BaseShake.jolt_scale.y,
+                ( LocalRandom( iVel * 2 ) - iVel ) / ( ( iVel * 2 ) * 4 ) * BaseShake.jolt_scale.z )
 //                * (( 200 - DynamicObject->MyTrack->iQualityFlag ) * 0.0075 ) // scale to 75-150% based on track quality
                * 1.25,
                ShakeState.offset );
@@ -6986,7 +7030,7 @@ TDynamicObject::powertrain_sounds::render( TMoverParameters const &Vehicle, doub
                if( ( volume < 1.0 )
                 && ( Vehicle.EnginePower < 100 ) ) {

-                    auto const volumevariation { Random( 100 ) * Vehicle.enrot / ( 1 + Vehicle.nmax ) };
+                    auto const volumevariation { LocalRandom( 100 ) * Vehicle.enrot / ( 1 + Vehicle.nmax ) };
                    if( volumevariation < 2 ) {
                        volume += volumevariation / 200;
                    }
@@ -7362,6 +7406,7 @@ vehicle_table::erase_disabled() {
                // TBD, TODO: kill vehicle sounds
                SafeDelete( simulation::Train );
            }
+			simulation::Trains.purge(vehicle->name());
            // remove potential entries in the light array
            simulation::Lights.remove( vehicle );
 /*
--- a/DynObj.h
+++ b/DynObj.h
@@ -544,6 +544,7 @@ private:

    TDynamicObject();
    ~TDynamicObject();
+	void place_on_track(TTrack *Track, double fDist, bool Reversed);
    // zwraca długość pojazdu albo 0, jeśli błąd
    double Init(
        std::string Name, std::string BaseDir, std::string asReplacableSkin, std::string Type_Name,
@@ -672,6 +673,7 @@ private:
    material_handle DestinationFind( std::string Destination );
    void OverheadTrack(float o);
    glm::dvec3 get_future_movement() const;
+	void move_set(double distance);

    double MED[9][8]; // lista zmiennych do debugowania hamulca ED
    static std::string const MED_labels[ 8 ];
--- a/EvLaunch.cpp
+++ b/EvLaunch.cpp
@@ -31,20 +31,23 @@ http://mozilla.org/MPL/2.0/.
 // encodes expected key in a short, where low byte represents the actual key,
 // and the high byte holds modifiers: 0x1 = shift, 0x2 = ctrl, 0x4 = alt
 int vk_to_glfw_key( int const Keycode ) {
+	char modifier = 0;
+	char key = 0;

-#ifdef _WIN32
-    auto const code = VkKeyScan( Keycode );
-    char key = code & 0xff;
-    char shiftstate = ( code & 0xff00 ) >> 8;
+	if (Keycode < 'A') {
+		key = Keycode;
+	} else if (Keycode <= 'Z') {
+		key = Keycode;
+		modifier = GLFW_MOD_SHIFT;
+	} else if (Keycode < 'a') {
+		key = Keycode;
+	} else if (Keycode <= 'z') {
+		key = Keycode - 32;
+	} else {
+		ErrorLog("unknown key: " + std::to_string(Keycode));
+	}

-    if( (key >= 'A') && (key <= 'Z') ) {
-        key = GLFW_KEY_A + key - 'A';
-    }
-    else if( ( key >= '0' ) && ( key <= '9' ) ) {
-        key = GLFW_KEY_0 + key - '0';
-    }
-    return key + ( shiftstate << 8 );
-#endif
+	return ((int)modifier << 8) | key;
 }

 bool TEventLauncher::Load(cParser *parser)
@@ -152,24 +155,33 @@ bool TEventLauncher::Load(cParser *parser)
    return true;
 }

+bool TEventLauncher::check_activation_key() {
+	if (iKey <= 0)
+		return false;
+
+	char key = iKey & 0xff;
+
+	bool result = Console::Pressed(key);
+
+	char modifier = iKey >> 8;
+	if (modifier & GLFW_MOD_SHIFT)
+		result &= Global.shiftState;
+	if (modifier & GLFW_MOD_CONTROL)
+		result &= Global.ctrlState;
+
+	return result;
+}
+
 bool TEventLauncher::check_activation() {

    auto bCond { false };

-    if( iKey > 0 ) {
-        if( iKey > 255 ) {
-            // key and modifier
-            auto const modifier = ( iKey & 0xff00 ) >> 8;
-            bCond = ( Console::Pressed( iKey & 0xff ) )
-                 && ( ( modifier & 1 ) ? Global.shiftState : true )
-                 && ( ( modifier & 2 ) ? Global.ctrlState : true );
-        }
-        else {
-            // just key
-            bCond = ( Console::Pressed( iKey & 0xff ) ); // czy klawisz wciśnięty
-        }
-    }
-    if( DeltaTime > 0 ) {
+	if (DeltaTime == 10000.0) {
+		if (UpdatedTime == 0.0)
+			bCond = true;
+		UpdatedTime = 1.0;
+	}
+	else if( DeltaTime > 0 ) {
        if( UpdatedTime > DeltaTime ) {
            UpdatedTime = 0; // naliczanie od nowa
            bCond = true;
--- a/EvLaunch.h
+++ b/EvLaunch.h
@@ -30,6 +30,7 @@ public:

 // methods
    bool Load( cParser *parser );
+	bool check_activation_key();
    bool check_activation();
    // checks conditions associated with the event. returns: true if the conditions are met
    bool check_conditions();
--- a/Event.cpp
+++ b/Event.cpp
@@ -1966,14 +1966,19 @@ event_manager::update() {
    CheckQuery();
    // test list of global events for possible new additions to the queue
    for( auto *launcher : m_launcherqueue ) {
+		if (launcher->check_conditions() && launcher->Event1) {
+			// NOTE: we're presuming global events aren't going to use event2

-        if( true == ( launcher->check_activation() && launcher->check_conditions() ) ) {
-            // NOTE: we're presuming global events aren't going to use event2
-            WriteLog( "Eventlauncher " + launcher->name() );
-            if( launcher->Event1 ) {
-                AddToQuery( launcher->Event1, nullptr );
-            }
-        }
+			if (launcher->check_activation()) {
+				WriteLog( "Eventlauncher: " + launcher->name() );
+				AddToQuery( launcher->Event1, nullptr );
+			}
+
+			if (launcher->check_activation_key()) {
+				WriteLog( "Eventlauncher: " + launcher->name() );
+				m_relay.post(user_command::queueevent, 0.0, 0.0, GLFW_PRESS, 0, glm::vec3(0.0f), &launcher->Event1->name());
+			}
+		}
    }
 }

--- a/Event.h
+++ b/Event.h
@@ -77,6 +77,7 @@ public:
    virtual glm::dvec3 input_location() const;
    void group( scene::group_handle Group );
    scene::group_handle group() const;
+	std::string const &name() const { return m_name; }
 // members
    basic_event *m_next { nullptr }; // następny w kolejce // TODO: replace with event list in the manager
    basic_event *m_sibling { nullptr }; // kolejny event z tą samą nazwą - od wersji 378
@@ -584,6 +585,10 @@ public:
    // legacy method, returns pointer to specified event, or null
    basic_event *
        FindEvent( std::string const &Name );
+	inline TEventLauncher* FindEventlauncher(std::string const &Name) {
+		auto ptr = m_inputdrivenlaunchers.find(Name);
+		return ptr ? ptr : m_radiodrivenlaunchers.find(Name);
+	}
    // legacy method, inserts specified event in the event query
    bool
        AddToQuery( basic_event *Event, TDynamicObject const *Owner );
@@ -618,6 +623,7 @@ private:
    basic_table<TEventLauncher> m_inputdrivenlaunchers;
    basic_table<TEventLauncher> m_radiodrivenlaunchers;
    eventlauncher_sequence m_launcherqueue;
+	command_relay m_relay;
 };


--- a/Globals.cpp
+++ b/Globals.cpp
@@ -52,7 +52,7 @@ global_settings::ConfigParse(cParser &Parser) {
        {

            Parser.getTokens();
-            Parser >> asHumanCtrlVehicle;
+            Parser >> local_start_vehicle;
        }
        else if( token == "fieldofview" ) {

@@ -768,6 +768,18 @@ global_settings::ConfigParse(cParser &Parser) {
            Parser.getTokens(1);
            Parser >> gfx_shadowmap_enabled;
        }
+		else if (token == "fpslimit")
+		{
+			Parser.getTokens(1);
+			float fpslimit;
+			Parser >> fpslimit;
+			minframetime = std::chrono::duration<float>(1.0f / fpslimit);
+		}
+		else if (token == "randomseed")
+		{
+			Parser.getTokens(1);
+			Parser >> Global.random_seed;
+		}
        else if (token == "gfx.envmap.enabled")
        {
            Parser.getTokens(1);
@@ -852,6 +864,29 @@ global_settings::ConfigParse(cParser &Parser) {
 			Parser.getTokens(1);
 			Parser >> python_mipmaps;
 		}
+		else if (token == "network.server")
+		{
+			Parser.getTokens(2);
+
+			std::string backend;
+			std::string conf;
+			Parser >> backend >> conf;
+
+			network_servers.push_back(std::make_pair(backend, conf));
+		}
+		else if (token == "network.client")
+		{
+			Parser.getTokens(2);
+
+			network_client.emplace();
+			Parser >> network_client->first;
+			Parser >> network_client->second;
+		}
+		else if (token == "execonexit") {
+			Parser.getTokens(1);
+			Parser >> exec_on_exit;
+			std::replace(std::begin(exec_on_exit), std::end(exec_on_exit), '_', ' ');
+		}
 /*
 		else if (token == "crashdamage") {
 			Parser.getTokens(1);
--- a/Globals.h
+++ b/Globals.h
@@ -28,8 +28,11 @@ struct global_settings {
    bool shiftState{ false }; //m7todo: brzydko
    bool ctrlState{ false };
    bool altState{ false };
-    std::mt19937 random_engine{ std::mt19937( static_cast<unsigned int>( std::time( NULL ) ) ) };
-    std::mt19937 local_random_engine{ std::mt19937( static_cast<unsigned int>( std::time( NULL ) ) ) };
+	std::mt19937 random_engine;
+	std::mt19937 local_random_engine;
+	bool ready_to_load { false };
+	std::time_t starting_timestamp = 0; // starting time, in local timezone
+	uint32_t random_seed = 0;
    TDynamicObject *changeDynObj{ nullptr };// info o zmianie pojazdu
    TCamera pCamera; // parametry kamery
    TCamera pDebugCamera;
@@ -63,7 +66,7 @@ struct global_settings {
    std::string szTexturesDDS{ ".dds" }; // lista tekstur od DDS
    std::string szDefaultExt{ szTexturesDDS };
    std::string SceneryFile{ "td.scn" };
-    std::string asHumanCtrlVehicle{ "EU07-424" };
+    std::string local_start_vehicle{ "EU07-424" };
    int iConvertModels{ 0 }; // tworzenie plików binarnych
    bool file_binary_terrain{ true }; // enable binary terrain (de)serialization
    // logs
@@ -188,6 +191,13 @@ struct global_settings {
    std::string asVersion{ "UNKNOWN" }; // z opisem
    // TODO: move these to relevant areas
    bool render_cab = true;
+
+	std::chrono::duration<float> minframetime {0.0f};
+
+    std::string fullscreen_monitor;
+
+    bool python_mipmaps = true;
+
    int gfx_framebuffer_width = -1;
    int gfx_framebuffer_height = -1;
    int gfx_framebuffer_fidelity = -1;
@@ -202,8 +212,12 @@ struct global_settings {
    bool gfx_extraeffects = true;
    bool gfx_shadergamma = false;
    bool gfx_usegles = false;
-    std::string fullscreen_monitor;
-    bool python_mipmaps = true;
+
+    std::string exec_on_exit;
+
+    std::vector<std::pair<std::string, std::string>> network_servers;
+    std::optional<std::pair<std::string, std::string>> network_client;
+    double desync = 0.0;

 // methods
    void LoadIniFile( std::string asFileName );
--- a/Logs.h
+++ b/Logs.h
@@ -20,7 +20,7 @@ enum logtype : unsigned int {
 //    lua = ( 1 << 4 ),
    material = ( 1 << 5 ),
 	shader = ( 1 << 6 ),
-//    net = ( 1 << 7 )
+    net = ( 1 << 7 )
 };

 void WriteLog( const char *str, logtype const Type = logtype::generic );
--- a/Names.h
+++ b/Names.h
@@ -38,6 +38,43 @@ public:
            // item with this name already exists; update mapping to point to the new one, for backward compatibility
            mapping.first->second = itemhandle;
            return false; }
+	void purge (std::string const &Name)
+	{
+		auto lookup = m_itemmap.find( Name );
+		if (lookup == m_itemmap.end())
+			return;
+		delete m_items[lookup->second];
+
+		detach(Name);
+	}
+	void detach (std::string const &Name)
+	{
+		auto lookup = m_itemmap.find( Name );
+		if (lookup == m_itemmap.end())
+			return;
+
+		m_items[lookup->second] = nullptr;
+		// TBD, TODO: remove from m_items?
+
+		m_itemmap.erase(lookup);
+	}
+	uint32_t find_id( std::string const &Name) const {
+		auto lookup = m_itemmap.find( Name );
+		return (
+		    lookup != m_itemmap.end() ?
+		        lookup->second :
+		        -1 );
+	}
+	void purge (Type_ *Item)
+	{
+		for (auto it = m_items.begin(); it != m_items.end(); it++) {
+			if (*it == Item) {
+				delete *it;
+				*it = nullptr;
+				return;
+			}
+		}
+	}
    // locates item with specified name. returns pointer to the item, or nullptr
    Type_ *
        find( std::string const &Name ) const {
--- a/Timer.cpp
+++ b/Timer.cpp
@@ -15,13 +15,14 @@ namespace Timer {

 subsystem_stopwatches subsystem;

-double DeltaTime, DeltaRenderTime;
+double DeltaTime = 0.0, DeltaRenderTime = 0.0;
 double fFPS{ 0.0f };
 double fLastTime{ 0.0f };
 DWORD dwFrames{ 0 };
 double fSimulationTime{ 0.0 };
 double fSoundTimer{ 0.0 };
 double fSinceStart{ 0.0 };
+double override_delta = -1.0f;

 double GetTime()
 {
@@ -30,6 +31,8 @@ double GetTime()

 double GetDeltaTime()
 { // czas symulacji (stoi gdy pauza)
+	if (override_delta != -1.0f)
+		return override_delta;
    return DeltaTime;
 }

@@ -38,35 +41,31 @@ double GetDeltaRenderTime()
    return DeltaRenderTime;
 }

-void SetDeltaTime(double t)
+void set_delta_override(double t)
 {
-    DeltaTime = t;
-}
-
-bool GetSoundTimer()
-{ // Ra: być może, by dźwięki nie modyfikowały się zbyt często, po 0.1s zeruje się ten licznik
-    return (fSoundTimer == 0.0f);
-}
-
-double GetFPS()
-{
-    return fFPS;
+	override_delta = t;
 }

 void ResetTimers()
 {
    UpdateTimers( Global.iPause != 0 );
-    DeltaTime = 0.1;
+	DeltaTime = 0.0;
    DeltaRenderTime = 0.0;
-    fSoundTimer = 0.0;
-};
+}

-LONGLONG fr, count, oldCount;
-
-void UpdateTimers(bool pause) {
+uint64_t fr, count, oldCount;

+void UpdateTimers(bool pause)
+{
+#ifdef _WIN32
    QueryPerformanceFrequency((LARGE_INTEGER *)&fr);
    QueryPerformanceCounter((LARGE_INTEGER *)&count);
+#elif __unix__
+	timespec ts;
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	count = (uint64_t)ts.tv_sec * 1000000000 + (uint64_t)ts.tv_nsec;
+	fr = 1000000000;
+#endif
    DeltaRenderTime = double(count - oldCount) / double(fr);
    if (!pause)
    {
@@ -77,15 +76,19 @@ void UpdateTimers(bool pause) {

        if (DeltaTime > 1.0)
            DeltaTime = 1.0;
+
+		fSimulationTime += GetDeltaTime();
    }
    else
        DeltaTime = 0.0; // wszystko stoi, bo czas nie płynie

    oldCount = count;
    // Keep track of the time lapse and frame count
-#if _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#if __unix__
+	double fTime = (double)(count / 1000000000);
+#elif _WIN32_WINNT >= _WIN32_WINNT_VISTA
    double fTime = ::GetTickCount64() * 0.001f; // Get current time in seconds
-#else
+#elif _WIN32
    double fTime = ::GetTickCount() * 0.001f; // Get current time in seconds
 #endif
    ++dwFrames; // licznik ramek
@@ -96,7 +99,6 @@ void UpdateTimers(bool pause) {
        fLastTime = fTime;
        dwFrames = 0L;
    }
-    fSimulationTime += DeltaTime;
 };

 }; // namespace timer
--- a/Timer.h
+++ b/Timer.h
@@ -16,11 +16,7 @@ double GetTime();
 double GetDeltaTime();
 double GetDeltaRenderTime();

-void SetDeltaTime(double v);
-
-bool GetSoundTimer();
-
-double GetFPS();
+void set_delta_override(double v);

 void ResetTimers();

@@ -35,17 +31,23 @@ public:
    void
        start() {
            m_start = std::chrono::steady_clock::now(); }
-    void
+	std::chrono::duration<float, std::milli>
        stop() {
-            m_accumulator = 0.95f * m_accumulator + std::chrono::duration_cast<std::chrono::microseconds>( ( std::chrono::steady_clock::now() - m_start ) ).count() / 1000.f; }
+		    m_last = std::chrono::duration_cast<std::chrono::microseconds>( ( std::chrono::steady_clock::now() - m_start ) );
+			m_accumulator = 0.95f * m_accumulator + m_last.count() / 1000.f;
+			return m_last; }
    float
        average() const {
            return m_accumulator / 20.f;}
+	std::chrono::microseconds
+	    last() const {
+		    return m_last; }

 private:
 // members
    std::chrono::time_point<std::chrono::steady_clock> m_start { std::chrono::steady_clock::now() };
    float m_accumulator { 1000.f / 30.f * 20.f }; // 20 last samples, initial 'neutral' rate of 30 fps
+    std::chrono::microseconds m_last;
 };

 struct subsystem_stopwatches {
--- a/Train.cpp
+++ b/Train.cpp
@@ -381,6 +381,9 @@ TTrain::commandhandler_map const TTrain::m_commandhandlers = {
    { user_command::generictoggle7, &TTrain::OnCommand_generictoggle },
    { user_command::generictoggle8, &TTrain::OnCommand_generictoggle },
    { user_command::generictoggle9, &TTrain::OnCommand_generictoggle },
+    { user_command::vehiclemoveforwards, &TTrain::OnCommand_vehiclemoveforwards },
+    { user_command::vehiclemovebackwards, &TTrain::OnCommand_vehiclemovebackwards },
+    { user_command::vehicleboost, &TTrain::OnCommand_vehicleboost },
 	{ user_command::springbraketoggle, &TTrain::OnCommand_springbraketoggle },
 	{ user_command::springbrakeenable, &TTrain::OnCommand_springbrakeenable },
 	{ user_command::springbrakedisable, &TTrain::OnCommand_springbrakedisable },
@@ -5582,14 +5585,15 @@ void TTrain::OnCommand_cabchangeforward( TTrain *Train, command_data const &Comm
                    end::rear ) };
            if( TestFlag( Train->DynamicObject->MoverParameters->Couplers[ exitdirection ].CouplingFlag, coupling::gangway ) ) {
                // przejscie do nastepnego pojazdu
-                Global.changeDynObj = (
+                auto *targetvehicle = (
                    exitdirection == end::front ?
                        Train->DynamicObject->PrevConnected() :
                        Train->DynamicObject->NextConnected() );
-                Global.changeDynObj->MoverParameters->CabOccupied = (
+                targetvehicle->MoverParameters->CabOccupied = (
                    Train->DynamicObject->MoverParameters->Neighbours[ exitdirection ].vehicle_end ?
                        -1 :
                         1 );
+                Train->MoveToVehicle( targetvehicle );
            }
        }
        // HACK: match consist door permit state with the preset in the active cab
@@ -5615,14 +5619,15 @@ void TTrain::OnCommand_cabchangebackward( TTrain *Train, command_data const &Com
                    end::rear ) };
            if( TestFlag( Train->DynamicObject->MoverParameters->Couplers[ exitdirection ].CouplingFlag, coupling::gangway ) ) {
                // przejscie do nastepnego pojazdu
-                Global.changeDynObj = (
+                auto *targetvehicle = (
                    exitdirection == end::front ?
                        Train->DynamicObject->PrevConnected() :
                        Train->DynamicObject->NextConnected() );
-                Global.changeDynObj->MoverParameters->CabOccupied = (
+                targetvehicle->MoverParameters->CabOccupied = (
                    Train->DynamicObject->MoverParameters->Neighbours[ exitdirection ].vehicle_end ?
                        -1 :
                         1 );
+                Train->MoveToVehicle( targetvehicle );
            }
        }
        // HACK: match consist door permit state with the preset in the active cab
@@ -5632,6 +5637,38 @@ void TTrain::OnCommand_cabchangebackward( TTrain *Train, command_data const &Com
    }
 }

+void TTrain::OnCommand_vehiclemoveforwards(TTrain *Train, const command_data &Command) {
+	if (Command.action == GLFW_RELEASE || !DebugModeFlag)
+		return;
+
+	Train->DynamicObject->move_set(100.0);
+}
+
+void TTrain::OnCommand_vehiclemovebackwards(TTrain *Train, const command_data &Command) {
+	if (Command.action == GLFW_RELEASE || !DebugModeFlag)
+		return;
+
+	Train->DynamicObject->move_set(-100.0);
+}
+
+void TTrain::OnCommand_vehicleboost(TTrain *Train, const command_data &Command) {
+	if (Command.action == GLFW_RELEASE || !DebugModeFlag)
+		return;
+
+	double boost = Command.param1 != 0.0 ? Command.param1 : 2.78;
+
+	TDynamicObject *d = Train->DynamicObject;
+	while( d ) {
+		d->MoverParameters->V += d->DirectionGet() * boost;
+		d = d->Next(); // pozostałe też
+	}
+	d = Train->DynamicObject->Prev();
+	while( d ) {
+		d->MoverParameters->V += d->DirectionGet() * boost;
+		d = d->Prev(); // w drugą stronę też
+	}
+}
+
 // cab movement update, fixed step part
 void TTrain::UpdateCab() {

@@ -5720,7 +5757,7 @@ bool TTrain::Update( double const Deltatime )
    command_data commanddata;
    // NOTE: currently we're only storing commands for local vehicle and there's no id system in place,
    // so we're supplying 'default' vehicle id of 0
-    while( simulation::Commands.pop( commanddata, static_cast<std::size_t>( command_target::vehicle ) | 0 ) ) {
+    while( simulation::Commands.pop( commanddata, static_cast<std::size_t>( command_target::vehicle ) | id() ) ) {

        auto lookup = m_commandhandlers.find( commanddata.command );
        if( lookup != m_commandhandlers.end() ) {
@@ -7829,6 +7866,95 @@ void TTrain::DynamicSet(TDynamicObject *d)
        }
 };

+void
+TTrain::MoveToVehicle(TDynamicObject *target) {
+	// > Ra: to nie może być tak robione, to zbytnia proteza jest
+	// indeed, too much hacks...
+	// TODO: cleanup
+
+	TTrain *target_train = simulation::Trains.find(target->name());
+	if (target_train) {
+		// let's try to destroy this TTrain and move to already existing one
+
+		if (!Dynamic()->Mechanik || !Dynamic()->Mechanik->AIControllFlag) {
+			// tylko jeśli ręcznie prowadzony
+			// jeśli prowadzi AI, to mu nie robimy dywersji!
+			Occupied()->CabDeactivisation();
+			Occupied()->CabOccupied = 0;
+			Occupied()->BrakeLevelSet(Occupied()->Handle->GetPos(bh_NP)); //rozwala sterowanie hamulcem GF 04-2016
+			Dynamic()->MechInside = false;
+			Dynamic()->Controller = AIdriver;
+
+			Dynamic()->bDisplayCab = false;
+			Dynamic()->ABuSetModelShake( {} );
+
+			Dynamic()->Mechanik->MoveTo(target);
+
+			target_train->Occupied()->LimPipePress = target_train->Occupied()->PipePress;
+			target_train->Occupied()->CabActivisation(); // załączenie rozrządu (wirtualne kabiny)
+			target_train->Dynamic()->MechInside = true;
+			target_train->Dynamic()->Controller = Humandriver;
+		} else {
+			target_train->Dynamic()->bDisplayCab = false;
+			target_train->Dynamic()->ABuSetModelShake( {} );
+		}
+
+		target_train->Dynamic()->bDisplayCab = true;
+		target_train->Dynamic()->ABuSetModelShake( {} ); // zerowanie przesunięcia przed powrotem?
+
+		// potentially move player
+		if (simulation::Train == this) {
+			simulation::Train = target_train;
+		}
+
+		// delete this TTrain
+		pending_delete = true;
+	} else {
+		// move this TTrain to other dynamic
+
+		// remove TTrain from global list, we're going to change dynamic anyway
+		simulation::Trains.detach(Dynamic()->name());
+
+		if (!Dynamic()->Mechanik || !Dynamic()->Mechanik->AIControllFlag) {
+			// tylko jeśli ręcznie prowadzony
+			// jeśli prowadzi AI, to mu nie robimy dywersji!
+
+			Occupied()->CabDeactivisation();
+			Occupied()->CabOccupied = 0;
+			Occupied()->BrakeLevelSet(Occupied()->Handle->GetPos(bh_NP)); //rozwala sterowanie hamulcem GF 04-2016
+			Dynamic()->MechInside = false;
+			Dynamic()->Controller = AIdriver;
+
+			Dynamic()->bDisplayCab = false;
+			Dynamic()->ABuSetModelShake( {} );
+
+			Dynamic()->Mechanik->MoveTo(target);
+
+			DynamicSet(target);
+
+			Occupied()->LimPipePress = Occupied()->PipePress;
+			Occupied()->CabActivisation(); // załączenie rozrządu (wirtualne kabiny)
+			Dynamic()->MechInside = true;
+			Dynamic()->Controller = Humandriver;
+		} else {
+			Dynamic()->bDisplayCab = false;
+			Dynamic()->ABuSetModelShake( {} );
+
+			DynamicSet(target);
+		}
+
+		InitializeCab(
+		    Occupied()->CabActive,
+		    Dynamic()->asBaseDir + Occupied()->TypeName + ".mmd" );
+
+		Dynamic()->bDisplayCab = true;
+		Dynamic()->ABuSetModelShake( {} ); // zerowanie przesunięcia przed powrotem?
+
+		// add it back with updated dynamic name
+		simulation::Trains.insert(this);
+	}
+}
+
 // checks whether specified point is within boundaries of the active cab
 bool
 TTrain::point_inside( Math3D::vector3 const Point ) const {
@@ -9106,3 +9232,33 @@ bool TTrain::initialize_gauge(cParser &Parser, std::string const &Label, int con

    return true;
 }
+
+uint16_t TTrain::id() {
+	if (vid == 0) {
+		vid = ++simulation::prev_train_id;
+		WriteLog("net: assigning id " + std::to_string(vid) + " to vehicle " + Dynamic()->name(), logtype::net);
+	}
+	return vid;
+}
+
+void train_table::update(double dt)
+{
+	for (TTrain *train : m_items) {
+		if (!train)
+			continue;
+
+		train->Update(dt);
+
+		if (train->pending_delete) {
+			purge(train->Dynamic()->name());
+			if (simulation::Train == train)
+				simulation::Train = nullptr;
+		}
+
+		// for single-player destroy non-player trains
+		if (simulation::Train != train
+		        && Global.network_servers.empty() && !Global.network_client) {
+			purge(train->Dynamic()->name());
+		}
+	}
+}
--- a/Train.h
+++ b/Train.h
@@ -130,6 +130,9 @@ class TTrain {
    bool LoadMMediaFile(std::string const &asFileName);
    dictionary_source *GetTrainState();
    state_t get_state() const;
+    inline
+    std::string name() const {
+        return Dynamic()->name(); }

  private:
 // types
@@ -384,6 +387,9 @@ class TTrain {
    static void OnCommand_cabchangeforward( TTrain *Train, command_data const &Command );
    static void OnCommand_cabchangebackward( TTrain *Train, command_data const &Command );
    static void OnCommand_generictoggle( TTrain *Train, command_data const &Command );
+	static void OnCommand_vehiclemoveforwards( TTrain *Train, command_data const &Command );
+	static void OnCommand_vehiclemovebackwards( TTrain *Train, command_data const &Command );
+	static void OnCommand_vehicleboost( TTrain *Train, command_data const &Command );
 	static void OnCommand_springbraketoggle(TTrain *Train, command_data const &Command);
 	static void OnCommand_springbrakeenable(TTrain *Train, command_data const &Command);
 	static void OnCommand_springbrakedisable(TTrain *Train, command_data const &Command);
@@ -754,6 +760,7 @@ private:
    bool m_mastercontrollerinuse { false };
    float m_mastercontrollerreturndelay { 0.f };
    std::vector<std::pair<std::string, texture_handle>> m_screens;
+	uint16_t vid { 0 }; // train network recipient id
    float m_distancecounter { -1.f }; // distance traveled since meter was activated or -1 if inactive
    double m_brakehandlecp{ 0.0 };
    int m_pantselection{ 0 };
@@ -775,9 +782,18 @@ private:
    inline TMoverParameters *Occupied() { return mvOccupied; };
    inline TMoverParameters const *Occupied() const { return mvOccupied; };
    void DynamicSet(TDynamicObject *d);
+    void MoveToVehicle( TDynamicObject *target );
    // checks whether specified point is within boundaries of the active cab
    bool point_inside( Math3D::vector3 const Point ) const;
    Math3D::vector3 clamp_inside( Math3D::vector3 const &Point ) const;

+	uint16_t id();
+	bool pending_delete = false;
 };
+
+class train_table : public basic_table<TTrain> {
+public:
+    void update( double dt );
+};
+
 //---------------------------------------------------------------------------
--- a/TrkFoll.cpp
+++ b/TrkFoll.cpp
@@ -38,6 +38,12 @@ bool TTrackFollower::Init(TTrack *pTrack, TDynamicObject *NewOwner, double fDir)
    return true;
 }

+void TTrackFollower::Reset()
+{
+	fCurrentDistance = 0.0;
+	fDirection = 1.0;
+}
+
 TTrack * TTrackFollower::SetCurrentTrack(TTrack *pTrack, int end)
 { // przejechanie na inny odcinkek toru, z ewentualnym rozpruciem
    if (pTrack)
--- a/TrkFoll.h
+++ b/TrkFoll.h
@@ -40,6 +40,7 @@ public:
    //{ return pCurrentSegment->ComputeLength(p1,cp1,cp2,p2); };
    // inline double GetRadius(double L, double d);  //McZapkie-150503
    bool Init(TTrack *pTrack, TDynamicObject *NewOwner, double fDir);
+	void Reset();
    void Render(float fNr);
 // members
    double fOffsetH = 0.0; // Ra: odległość środka osi od osi toru (dla samochodów) - użyć do wężykowania
--- a/application.cpp
+++ b/application.cpp
@@ -43,6 +43,11 @@ http://mozilla.org/MPL/2.0/.
 #pragma comment (lib, "dbghelp.lib")
 #pragma comment (lib, "version.lib")

+#ifdef __unix__
+#include <unistd.h>
+#include <sys/stat.h>
+#endif
+
 extern "C" { _declspec( dllexport ) DWORD AmdPowerXpressRequestHighPerformance = 0x00000001; }
 extern "C" { _declspec( dllexport ) DWORD NvOptimusEnablement = 0x00000001; }

@@ -65,19 +70,14 @@ extern WNDPROC BaseWindowProc;
 // user input callbacks

 void focus_callback( GLFWwindow *window, int focus ) {
-    if( Global.bInactivePause ) // jeśli ma być pauzowanie okna w tle
-        if( focus )
-            Global.iPause &= ~4; // odpauzowanie, gdy jest na pierwszym planie
-        else
-            Global.iPause |= 4; // włączenie pauzy, gdy nieaktywy
+	Application.on_focus_change(focus != 0);
 }

 void window_resize_callback( GLFWwindow *window, int w, int h ) {
    // NOTE: we have two variables which basically do the same thing as we don't have dynamic fullscreen toggle
    // TBD, TODO: merge them?
    Global.iWindowWidth = w;
-    Global.iWindowHeight = h;
-    Global.fDistanceFactor = std::max( 0.5f, h / 768.0f ); // not sure if this is really something we want to use
+	Global.iWindowHeight = h;
    glViewport( 0, 0, w, h );
 }

@@ -101,6 +101,11 @@ void key_callback( GLFWwindow *window, int key, int scancode, int action, int mo
    Application.on_key( key, scancode, action, mods );
 }

+void char_callback(GLFWwindow *window, unsigned int c)
+{
+    Application.on_char(c);
+}
+
 // public:

 int
@@ -117,10 +122,10 @@ eu07_application::init( int Argc, char *Argv[] ) {
        return result;
    }

-    WriteLog( "Starting MaSzyna rail vehicle simulator (release: " + Global.asVersion + ")" );
-    WriteLog( "For online documentation and additional files refer to: http://eu07.pl" );
-    WriteLog( "Authors: Marcin_EU, McZapkie, ABu, Winger, Tolaris, nbmx, OLO_EU, Bart, Quark-t, "
-        "ShaXbee, Oli_EU, youBy, KURS90, Ra, hunter, szociu, Stele, Q, firleju and others\n" );
+	WriteLog( "Starting MaSzyna rail vehicle simulator (release: " + Global.asVersion + ")" );
+	WriteLog( "For online documentation and additional files refer to: http://eu07.pl" );
+	WriteLog( "Authors: Marcin_EU, McZapkie, ABu, Winger, Tolaris, nbmx, OLO_EU, Bart, Quark-t, "
+	    "ShaXbee, Oli_EU, youBy, KURS90, Ra, hunter, szociu, Stele, Q, firleju and others\n" );

    if( ( result = init_glfw() ) != 0 ) {
        return result;
@@ -140,9 +145,28 @@ eu07_application::init( int Argc, char *Argv[] ) {
        return result;
    }

+	if (!init_network())
+		return -1;
+
    return result;
 }

+double eu07_application::generate_sync() {
+	if (Timer::GetDeltaTime() == 0.0)
+		return 0.0;
+	double sync = 0.0;
+	for (const TDynamicObject* vehicle : simulation::Vehicles.sequence()) {
+        auto const pos { vehicle->GetPosition() };
+		 sync += pos.x + pos.y + pos.z;
+	}
+	sync += Random(1.0, 100.0);
+	return sync;
+}
+
+void eu07_application::queue_quit() {
+	glfwSetWindowShouldClose(m_windows[0], GLFW_TRUE);
+}
+
 int
 eu07_application::run() {

@@ -151,11 +175,125 @@ eu07_application::run() {
    {
        Timer::subsystem.mainloop_total.start();

-        if( !m_modes[ m_modestack.top() ]->update() )
-            break;
+		// -------------------------------------------------------------------
+		// multiplayer command relaying logic can seem a bit complex
+		//
+		// we are simultaneously:
+		// => master (not client) OR slave (client)
+		// => server OR not
+		//
+		// trivia: being client and server is possible
+
+		double frameStartTime = Timer::GetTime();
+
+		if (m_modes[m_modestack.top()]->is_command_processor()) {
+			// active mode is doing real calculations (e.g. drivermode)
+			int loop_remaining = MAX_NETWORK_PER_FRAME;
+			while (--loop_remaining > 0)
+			{
+				command_queue::commands_map commands_to_exec;
+				command_queue::commands_map local_commands = simulation::Commands.pop_intercept_queue();
+				double slave_sync;
+
+				// if we're the server
+				if (m_network && m_network->servers)
+				{
+					// fetch from network layer command requests received from clients
+					command_queue::commands_map remote_commands = m_network->servers->pop_commands();
+
+					// push these into local queue
+					add_to_dequemap(local_commands, remote_commands);
+				}
+
+				// if we're slave
+				if (m_network && m_network->client)
+				{
+					// fetch frame info from network layer,
+					auto frame_info = m_network->client->get_next_delta(MAX_NETWORK_PER_FRAME - loop_remaining);
+
+					// use delta and commands received from master
+					double delta = std::get<0>(frame_info);
+					Timer::set_delta_override(delta);
+					slave_sync = std::get<1>(frame_info);
+					add_to_dequemap(commands_to_exec, std::get<2>(frame_info));
+
+					// and send our local commands to master
+					m_network->client->send_commands(local_commands);
+
+					if (delta == 0.0)
+						loop_remaining = -1;
+				}
+				// if we're master
+				else {
+					// just push local commands to execution
+					add_to_dequemap(commands_to_exec, local_commands);
+
+					loop_remaining = -1;
+				}
+
+				// send commands to command queue
+				simulation::Commands.push_commands(commands_to_exec);
+
+				// do actual frame processing
+				if (!m_modes[ m_modestack.top() ]->update())
+					return 0;
+
+				double sync = generate_sync();
+
+				// if we're the server
+				if (m_network && m_network->servers)
+				{
+					// send delta, sync, and commands we just executed to clients
+					double delta = Timer::GetDeltaTime();
+					double render = Timer::GetDeltaRenderTime();
+					m_network->servers->push_delta(render, delta, sync, commands_to_exec);
+				}
+
+				// if we're slave
+				if (m_network && m_network->client)
+				{
+					// verify sync
+					if (sync != slave_sync) {						
+						WriteLog("net: desync! calculated: " + std::to_string(sync)
+						         + ", received: " + std::to_string(slave_sync), logtype::net);
+
+						Global.desync = slave_sync - sync;
+					}
+
+					// set total delta for rendering code
+					double totalDelta = Timer::GetTime() - frameStartTime;
+					Timer::set_delta_override(totalDelta);
+				}
+			}
+
+			if (!loop_remaining) {
+				// loop break forced by counter
+				float received = m_network->client->get_frame_counter();
+				float awaiting = m_network->client->get_awaiting_frames();
+
+				// TODO: don't meddle with mode progresbar
+				m_modes[m_modestack.top()]->set_progress(100.0f, 100.0f * (received - awaiting) / received);
+			} else {
+				m_modes[m_modestack.top()]->set_progress(0.0f, 0.0f);
+			}
+		} else {
+			// active mode is loader
+
+			// clear local command queue
+			simulation::Commands.pop_intercept_queue();
+
+			// do actual frame processing
+            if (!m_modes[ m_modestack.top() ]->update())
+                return 0;
+		}
+
+		// -------------------------------------------------------------------
+
+        // TODO: re-enable after python changes merge
+		// m_taskqueue.update();

        if (!GfxRenderer->Render())
-            break;
+            return 0;

        glfwPollEvents();

@@ -164,10 +302,15 @@ eu07_application::run() {

        m_modes[ m_modestack.top() ]->on_event_poll();

-		Timer::subsystem.mainloop_total.stop();
+		if (m_network)
+			m_network->update();
+
+		auto frametime = Timer::subsystem.mainloop_total.stop();
+		if (Global.minframetime.count() != 0.0f && (Global.minframetime - frametime).count() > 0.0f)
+			std::this_thread::sleep_for(Global.minframetime - frametime);
    }

-	return 0;
+    return 0;
 }

 // issues request for a worker thread to perform specified task. returns: true if task was scheduled
@@ -199,8 +342,12 @@ eu07_application::release_python_lock() {

 void
 eu07_application::exit() {
+	for (auto &mode : m_modes)
+		mode.reset();

-    SafeDelete( simulation::Train );
+	m_network.reset();
+
+//    SafeDelete( simulation::Train );
    SafeDelete( simulation::Region );

    ui_layer::shutdown();
@@ -208,8 +355,11 @@ eu07_application::exit() {
    for( auto *window : m_windows ) {
        glfwDestroyWindow( window );
    }
-    glfwTerminate();
    m_taskqueue.exit();
+    glfwTerminate();
+
+	if (!Global.exec_on_exit.empty())
+		system(Global.exec_on_exit.c_str());
 }

 void
@@ -222,7 +372,6 @@ eu07_application::render_ui() {

 bool
 eu07_application::pop_mode() {
-
    if( m_modestack.empty() ) { return false; }

    m_modes[ m_modestack.top() ]->exit();
@@ -291,6 +440,7 @@ eu07_application::get_cursor_pos( double &Horizontal, double &Vertical ) const {
    glfwGetCursorPos( m_windows.front(), &Horizontal, &Vertical );
 }

+
 int
 eu07_application::get_mouse_button( int const Button ) const {

@@ -314,6 +464,13 @@ eu07_application::on_key( int const Key, int const Scancode, int const Action, i
    m_modes[ m_modestack.top() ]->on_key( Key, Scancode, Action, Mods );
 }

+void eu07_application::on_char( unsigned int const Char ) {
+
+    if( m_modestack.empty() ) { return; }
+
+    m_modes[ m_modestack.top() ]->on_char( Char );
+}
+
 void
 eu07_application::on_cursor_pos( double const Horizontal, double const Vertical ) {

@@ -338,6 +495,13 @@ eu07_application::on_scroll( double const Xoffset, double const Yoffset ) {
    m_modes[ m_modestack.top() ]->on_scroll( Xoffset, Yoffset );
 }

+void eu07_application::on_focus_change(bool focus) {
+	if( Global.bInactivePause && !m_network->client) {// jeśli ma być pauzowanie okna w tle
+		command_relay relay;
+		relay.post(user_command::focuspauseset, focus ? 1.0 : 0.0, 0.0, GLFW_PRESS, 0);
+	}
+}
+
 GLFWwindow *
 eu07_application::window(int const Windowindex, bool visible, int width, int height, GLFWmonitor *monitor, bool keep_ownership , bool share_ctx) {

@@ -373,7 +537,7 @@ eu07_application::window(int const Windowindex, bool visible, int width, int hei

 // private:
 GLFWmonitor* eu07_application::find_monitor(const std::string &str) const {
-	int monitor_count;
+    int monitor_count;
 	GLFWmonitor **monitors = glfwGetMonitors(&monitor_count);

 	for (size_t i = 0; i < monitor_count; i++) {
@@ -394,17 +558,21 @@ std::string eu07_application::describe_monitor(GLFWmonitor *monitor) const {
 	return name + ":" + std::to_string(x) + "," + std::to_string(y);
 }

+// private:
+
 void
 eu07_application::init_debug() {

 #if defined(_MSC_VER) && defined (_DEBUG)
    // memory leaks
    _CrtSetDbgFlag( _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG ) | _CRTDBG_LEAK_CHECK_DF );
+    /*
    // floating point operation errors
    auto state { _clearfp() };
    state = _control87( 0, 0 );
    // this will turn on FPE for #IND and zerodiv
    state = _control87( state & ~( _EM_ZERODIVIDE | _EM_INVALID ), _MCW_EM );
+    */
 #endif
 #ifdef _WIN32
    ::SetUnhandledExceptionFilter( unhandled_handler );
@@ -417,7 +585,11 @@ eu07_application::init_files() {
 #ifdef _WIN32
    DeleteFile( "log.txt" );
    DeleteFile( "errors.txt" );
-    _mkdir( "logs" );
+    CreateDirectory( "logs", NULL );
+#elif __unix__
+	unlink("log.txt");
+	unlink("errors.txt");
+	mkdir("logs", 0755);
 #endif
 }

@@ -425,10 +597,12 @@ int
 eu07_application::init_settings( int Argc, char *Argv[] ) {

    Global.LoadIniFile( "eu07.ini" );
+#ifdef _WIN32
    if( ( Global.iWriteLogEnabled & 2 ) != 0 ) {
        // show output console if requested
        AllocConsole();
    }
+#endif
 /*
    std::string executable( argv[ 0 ] ); auto const pathend = executable.rfind( '\\' );
    Global.ExecutableName =
@@ -486,7 +660,7 @@ eu07_application::init_settings( int Argc, char *Argv[] ) {
        }
        else if( token == "-v" ) {
            if( i + 1 < Argc ) {
-                Global.asHumanCtrlVehicle = ToLower( Argv[ ++i ] );
+				Global.local_start_vehicle = ToLower( Argv[ ++i ] );
            }
        }
        else {
@@ -588,6 +762,7 @@ eu07_application::init_callbacks() {
    glfwSetMouseButtonCallback( window, mouse_button_callback );
    glfwSetKeyCallback( window, key_callback );
    glfwSetScrollCallback( window, scroll_callback );
+    glfwSetCharCallback(window, char_callback);
    glfwSetWindowFocusCallback( window, focus_callback );
    {
        int width, height;
@@ -668,7 +843,12 @@ eu07_application::init_data() {

 int
 eu07_application::init_modes() {
+	Global.local_random_engine.seed(std::random_device{}());

+	if ((!Global.network_servers.empty() || Global.network_client) && Global.SceneryFile.empty()) {
+		ErrorLog("launcher mode is currently not supported in network mode");
+		return -1;
+	}
    // NOTE: we could delay creation/initialization until transition to specific mode is requested,
    // but doing it in one go at the start saves us some error checking headache down the road

@@ -687,3 +867,42 @@ eu07_application::init_modes() {

    return 0;
 }
+
+bool eu07_application::init_network() {
+	if (!Global.network_servers.empty() || Global.network_client) {
+		// create network manager
+		m_network.emplace();
+	}
+
+	for (auto const &pair : Global.network_servers) {
+		// create all servers
+		m_network->create_server(pair.first, pair.second);
+	}
+
+	if (Global.network_client) {
+		// create client
+		m_network->connect(Global.network_client->first, Global.network_client->second);
+	} else {
+		// we're simulation master
+		if (!Global.random_seed)
+			Global.random_seed = std::random_device{}();
+		Global.random_engine.seed(Global.random_seed);
+
+		// TODO: sort out this timezone mess
+		std::time_t utc_now = std::time(nullptr);
+
+		tm tm_local, tm_utc;
+		tm *tmp = std::localtime(&utc_now);
+		memcpy(&tm_local, tmp, sizeof(tm));
+		tmp = std::gmtime(&utc_now);
+		memcpy(&tm_utc, tmp, sizeof(tm));
+
+		int64_t offset = (tm_local.tm_hour * 3600 + tm_local.tm_min * 60 + tm_local.tm_sec)
+		        - (tm_utc.tm_hour * 3600 + tm_utc.tm_min * 60 + tm_utc.tm_sec);
+
+		Global.starting_timestamp = utc_now + offset;
+		Global.ready_to_load = true;
+	}
+
+	return true;
+}
--- a/application.h
+++ b/application.h
@@ -11,8 +11,10 @@ http://mozilla.org/MPL/2.0/.

 #include "applicationmode.h"
 #include "PyInt.h"
+#include "network/manager.h"

 class eu07_application {
+	const int MAX_NETWORK_PER_FRAME = 1000;

 public:
 // types
@@ -72,15 +74,24 @@ public:
    // input handlers
    void
        on_key( int const Key, int const Scancode, int const Action, int const Mods );
+    void
+        on_char( unsigned int const Char );
    void
        on_cursor_pos( double const Horizontal, double const Vertical );
    void
        on_mouse_button( int const Button, int const Action, int const Mods );
    void
        on_scroll( double const Xoffset, double const Yoffset );
+	void
+	    on_focus_change(bool focus);
    // gives access to specified window, creates a new window if index == -1
    GLFWwindow *
        window( int const Windowindex = 0, bool visible = false, int width = 1, int height = 1, GLFWmonitor *monitor = nullptr, bool keep_ownership = true, bool share_ctx = true );
+	// generate network sync verification number
+	double
+	    generate_sync();
+	void
+	    queue_quit();

 private:
 // types
@@ -97,6 +108,7 @@ private:
    int  init_audio();
    int  init_data();
    int  init_modes();
+	bool init_network();
    GLFWmonitor * find_monitor( const std::string &str ) const;
    std::string describe_monitor( GLFWmonitor *monitor ) const;
 // members
@@ -104,6 +116,8 @@ private:
    mode_stack m_modestack; // current behaviour mode
    python_taskqueue m_taskqueue;
    std::vector<GLFWwindow *> m_windows;
+
+	std::optional<network::manager> m_network;
 };

 extern eu07_application Application;
--- a/applicationmode.h
+++ b/applicationmode.h
@@ -57,6 +57,9 @@ public:
    void
        on_key( int const Key, int const Scancode, int const Action, int const Mods ) = 0;
    virtual
+    void
+        on_char( unsigned int const Char ) = 0;
+    virtual
    void
        on_cursor_pos( double const X, double const Y ) = 0;
    virtual
@@ -68,6 +71,9 @@ public:
    virtual
    void
        on_event_poll() = 0;
+	virtual
+	bool
+	    is_command_processor() = 0;

 protected:
 // members
--- a/command.cpp
+++ b/command.cpp
@@ -14,6 +14,8 @@ http://mozilla.org/MPL/2.0/.
 #include "Logs.h"
 #include "Timer.h"
 #include "utilities.h"
+#include "simulation.h"
+#include "Train.h"

 namespace simulation {

@@ -266,7 +268,36 @@ commanddescription_sequence Commands_descriptions = {
 	{ "speedcontrolbutton6", command_target::vehicle },
 	{ "speedcontrolbutton7", command_target::vehicle },
 	{ "speedcontrolbutton8", command_target::vehicle },
-	{ "speedcontrolbutton9", command_target::vehicle }
+	{ "speedcontrolbutton9", command_target::vehicle },
+
+    { "globalradiostop", command_target::simulation },
+    { "timejump", command_target::simulation },
+    { "timejumplarge", command_target::simulation },
+    { "timejumpsmall", command_target::simulation },
+    { "setdatetime", command_target::simulation },
+    { "setweather", command_target::simulation },
+    { "settemperature", command_target::simulation },
+    { "vehiclemoveforwards", command_target::vehicle },
+    { "vehiclemovebackwards", command_target::vehicle },
+    { "vehicleboost", command_target::vehicle },
+    { "debugtoggle", command_target::simulation },
+    { "focuspauseset", command_target::simulation },
+    { "pausetoggle", command_target::simulation },
+    { "entervehicle", command_target::simulation },
+    { "resetconsist", command_target::simulation },
+    { "fillcompressor", command_target::simulation },
+    { "consistreleaser", command_target::simulation },
+    { "queueevent", command_target::simulation },
+    { "setlight", command_target::simulation },
+    { "insertmodel", command_target::simulation },
+    { "deletemodel", command_target::simulation },
+    { "trainsetmove", command_target::simulation },
+    { "consistteleport", command_target::simulation },
+    { "pullalarmchain", command_target::simulation },
+    { "sendaicommand", command_target::simulation },
+    { "spawntrainset", command_target::simulation },
+    { "destroytrainset", command_target::simulation },
+    { "quitsimulation", command_target::simulation },
 };

 } // simulation
@@ -274,10 +305,18 @@ commanddescription_sequence Commands_descriptions = {
 // posts specified command for specified recipient
 void
 command_queue::push( command_data const &Command, std::size_t const Recipient ) {
+	if (is_network_target(Recipient)) {
+		auto lookup = m_intercept_queue.emplace(Recipient, commanddata_sequence());
+		lookup.first->second.emplace_back(Command);
+	} else {
+		push_direct(Command, Recipient);
+	}
+}

-    auto lookup = m_commands.emplace( Recipient, commanddata_sequence() );
-    // recipient stack was either located or created, so we can add to it quite safely
-    lookup.first->second.emplace( Command );
+void command_queue::push_direct(const command_data &Command, const uint32_t Recipient) {
+	auto lookup = m_commands.emplace( Recipient, commanddata_sequence() );
+	// recipient stack was either located or created, so we can add to it quite safely
+	lookup.first->second.emplace_back( Command );
 }

 // retrieves oldest posted command for specified recipient, if any. returns: true on retrieval, false if there's nothing to retrieve
@@ -296,15 +335,45 @@ command_queue::pop( command_data &Command, std::size_t const Recipient ) {
    }
    // we have command stack with command(s) on it, retrieve and pop the first one
    Command = commands.front();
-    commands.pop();
+    commands.pop_front();

    return true;
 }

+bool command_queue::is_network_target(uint32_t const Recipient) {
+	const command_target target = (command_target)(Recipient & ~0xffff);
+
+	if (target == command_target::entity)
+		return false;
+
+	return true;
+}
+
+command_queue::commands_map command_queue::pop_intercept_queue() {
+	commands_map map(m_intercept_queue);
+	m_intercept_queue.clear();
+	return map;
+}
+
+void command_queue::push_commands(const commands_map &commands) {
+	for (auto const &kv : commands)
+		for (command_data const &data : kv.second)
+			push_direct(data, kv.first);
+}
+
 void
-command_relay::post( user_command const Command, double const Param1, double const Param2, int const Action, std::uint16_t const Recipient ) const {
+command_relay::post(user_command const Command, double const Param1, double const Param2,
+                     int const Action, uint16_t Recipient, glm::vec3 Position, const std::string *Payload) const {

    auto const &command = simulation::Commands_descriptions[ static_cast<std::size_t>( Command ) ];
+
+	if (command.target == command_target::vehicle && Recipient == 0) {
+		// default 0 recipient is currently controlled train
+		if (simulation::Train == nullptr)
+			return;
+		Recipient = simulation::Train->id();
+	}
+
    if( ( command.target == command_target::vehicle )
     && ( true == FreeFlyModeFlag )
     && ( ( false == DebugModeFlag )
@@ -313,44 +382,15 @@ command_relay::post( user_command const Command, double const Param1, double con
        return;
    }

-    simulation::Commands.push(
-        command_data{
-            Command,
-            Action,
-            Param1,
-            Param2,
-            Timer::GetDeltaTime() },
-        static_cast<std::size_t>( command.target ) | Recipient );
-/*
-#ifdef _DEBUG
-    if( Action != GLFW_RELEASE ) {
-    // key was pressed or is still held
-        if( false == command.name.empty() ) {
-            if( false == (
-                ( Command == user_command::moveleft )
-             || ( Command == user_command::moveleftfast )
-             || ( Command == user_command::moveright )
-             || ( Command == user_command::moverightfast )
-             || ( Command == user_command::moveforward )
-             || ( Command == user_command::moveforwardfast )
-             || ( Command == user_command::moveback )
-             || ( Command == user_command::movebackfast )
-             || ( Command == user_command::moveup )
-             || ( Command == user_command::moveupfast )
-             || ( Command == user_command::movedown )
-             || ( Command == user_command::movedownfast )
-             || ( Command == user_command::movevector )
-             || ( Command == user_command::viewturn ) ) ) {
-                WriteLog( "Command issued: " + command.name );
-            }
-        }
-    }
-    else {
-    // key was released (but we don't log this)
-        WriteLog( "Key released: " + command.name );
-    }
-#endif
-*/
+	if (Position == glm::vec3(0.0f))
+		Position = Global.pCamera.Pos;
+
+	uint32_t combined_recipient = static_cast<uint32_t>( command.target ) | Recipient;
+	command_data commanddata({Command, Action, Param1, Param2, Timer::GetDeltaTime(), FreeFlyModeFlag, Position });
+	if (Payload)
+		commanddata.payload = *Payload;
+
+	simulation::Commands.push(commanddata, combined_recipient);
 }

 //---------------------------------------------------------------------------
--- a/command.h
+++ b/command.h
@@ -260,13 +260,42 @@ enum class user_command {
 	speedcontrolbutton7,
 	speedcontrolbutton8,
 	speedcontrolbutton9,
+
+    globalradiostop,
+    timejump,
+    timejumplarge,
+    timejumpsmall,
+    setdatetime,
+    setweather,
+    settemperature,
+    vehiclemoveforwards,
+    vehiclemovebackwards,
+    vehicleboost,
+    debugtoggle,
+    focuspauseset,
+    pausetoggle,
+    entervehicle,
+    resetconsist,
+    fillcompressor,
+    consistreleaser,
+    queueevent,
+    setlight,
+    insertmodel,
+    deletemodel,
+    dynamicmove,
+    consistteleport,
+    pullalarmchain,
+    sendaicommand,
+    spawntrainset,
+    destroytrainset,
+    quitsimulation,
+
    none = -1
 };

 enum class command_target {

    userinterface,
-    simulation,
 /*
    // NOTE: there's no need for consist- and unit-specific commands at this point, but it's a possibility.
    // since command targets are mutually exclusive these don't reduce ranges for individual vehicles etc
@@ -276,7 +305,9 @@ enum class command_target {
    // values are combined with object id. 0xffff objects of each type should be quite enough ("for everyone")
    vehicle = 0x10000,
    signal  = 0x20000,
-    entity  = 0x40000
+    entity  = 0x40000,
+
+    simulation = 0x80000
 };

 struct command_description {
@@ -292,6 +323,11 @@ struct command_data {
    double param1;
    double param2;
    double time_delta;
+
+    bool freefly;
+    glm::vec3 location;
+
+    std::string payload;
 };

 // command_queues: collects and holds commands from input sources, for processing by their intended recipients
@@ -301,6 +337,9 @@ struct command_data {
 class command_queue {

 public:
+// types
+	typedef std::deque<command_data> commanddata_sequence;
+	typedef std::unordered_map<uint32_t, commanddata_sequence> commands_map;
 // methods
    // posts specified command for specified recipient
    void
@@ -308,16 +347,36 @@ public:
    // retrieves oldest posted command for specified recipient, if any. returns: true on retrieval, false if there's nothing to retrieve
    bool
        pop( command_data &Command, std::size_t const Recipient );
+    // checks if given command must be scheduled on server
+	bool
+	    is_network_target(const uint32_t Recipient);
+
+	// pops commands from intercept queue
+	commands_map pop_intercept_queue();
+
+	// pushes commands into main queue
+	void push_commands(const commands_map &commands);

 private:
-// types
-    typedef std::queue<command_data> commanddata_sequence;
-    typedef std::unordered_map<std::size_t, commanddata_sequence> commanddatasequence_map;
 // members
-    commanddatasequence_map m_commands;
+	// contains command ready to execution
+	commands_map m_commands;

+	// contains intercepted commands to be read by application layer
+	commands_map m_intercept_queue;
+
+	void push_direct( command_data const &Command, uint32_t const Recipient );
 };

+template<typename A, typename B>
+void add_to_dequemap(std::unordered_map<A, std::deque<B>> &lhs, const std::unordered_map<A, std::deque<B>> &rhs) {
+	for (auto const &kv : rhs) {
+		auto lookup = lhs.emplace(kv.first, std::deque<B>());
+		for (B const &data : kv.second)
+			lookup.first->second.emplace_back(data);
+	}
+}
+
 // NOTE: simulation should be a (light) wrapper rather than namespace so we could potentially instance it,
 //       but realistically it's not like we're going to run more than one simulation at a time
 namespace simulation {
@@ -340,8 +399,8 @@ public:
    // posts specified command for the specified recipient
    // TODO: replace uint16_t with recipient handle, based on item id
    void
-        post( user_command const Command, double const Param1, double const Param2,
-            int const Action, std::uint16_t const Recipient ) const;
+	    post(user_command const Command, double const Param1, double const Param2,
+	        int const Action, uint16_t Recipient, glm::vec3 Position = glm::vec3(0.0f) , const std::string *Payload = nullptr) const;
 private:
 // types
 // members
--- a/driverkeyboardinput.cpp
+++ b/driverkeyboardinput.cpp
@@ -244,7 +244,7 @@ driverkeyboard_input::default_bindings() {
        // batterydisable,
        { user_command::motorblowerstogglefront, GLFW_KEY_N | keymodifier::shift },
        { user_command::motorblowerstogglerear, GLFW_KEY_M | keymodifier::shift },
-        { user_command::motorblowersdisableall, GLFW_KEY_M | keymodifier::control }
+        { user_command::motorblowersdisableall, GLFW_KEY_M | keymodifier::control },
        // coolingfanstoggle,
        // tempomattoggle,
        // springbraketoggle,
@@ -269,6 +269,15 @@ driverkeyboard_input::default_bindings() {
 	    // speedcontrolbutton7,
 	    // speedcontrolbutton8,
 	    // speedcontrolbutton9,
+	    // admin_timejump,
+	    { user_command::timejumplarge, GLFW_KEY_F1 | keymodifier::control },
+	    { user_command::timejumpsmall, GLFW_KEY_F1 | keymodifier::shift },
+	    // admin_vehiclemove,
+	    { user_command::vehiclemoveforwards, GLFW_KEY_LEFT_BRACKET | keymodifier::control },
+	    { user_command::vehiclemovebackwards, GLFW_KEY_RIGHT_BRACKET | keymodifier::control },
+	    { user_command::vehicleboost, GLFW_KEY_TAB | keymodifier::control },
+	    { user_command::debugtoggle, GLFW_KEY_F12 | keymodifier::control | keymodifier::shift },
+	    { user_command::pausetoggle, GLFW_KEY_ESCAPE }
    };
 }

--- a/drivermode.cpp
+++ b/drivermode.cpp
@@ -226,11 +226,26 @@ driver_mode::update() {

    // variable step simulation time routines

+    if (!change_train.empty()) {
+		TTrain *train = simulation::Trains.find(change_train);
+		if (train) {
+			simulation::Train = train;
+			InOutKey();
+			m_relay.post(user_command::aidriverdisable, 0.0, 0.0, GLFW_PRESS, 0);
+			change_train.clear();
+		}
+	}
+
    if( ( simulation::Train == nullptr ) && ( false == FreeFlyModeFlag ) ) {
        // intercept cases when the driven train got removed after entering portal
        InOutKey();
    }

+   	if (!FreeFlyModeFlag && simulation::Train->Dynamic() != Camera.m_owner) {
+		// fixup camera after vehicle switch
+		CabView();
+	}
+/*
    if( Global.changeDynObj ) {
        // ABu zmiana pojazdu - przejście do innego
        ChangeDynamic();
@@ -243,15 +258,13 @@ driver_mode::update() {
            InOutKey();
        }
    }
+*/
+	if( simulation::Train != nullptr )
+		TSubModel::iInstance = reinterpret_cast<std::uintptr_t>( simulation::Train->Dynamic() );
+	else
+		TSubModel::iInstance = 0;

-    if( simulation::Train != nullptr ) {
-        TSubModel::iInstance = reinterpret_cast<std::uintptr_t>( simulation::Train->Dynamic() );
-        simulation::Train->Update( deltatime );
-    }
-    else {
-        TSubModel::iInstance = 0;
-    }
-
+	simulation::Trains.update(deltatime);
    simulation::Events.update();
    simulation::Region->update_events();
    simulation::Lights.update();
@@ -260,12 +273,16 @@ driver_mode::update() {

    auto const deltarealtime = Timer::GetDeltaRenderTime(); // nie uwzględnia pauzowania ani mnożenia czasu

+    simulation::State.process_commands();
+
    // fixed step render time routines

    fTime50Hz += deltarealtime; // w pauzie też trzeba zliczać czas, bo przy dużym FPS będzie problem z odczytem ramek
    bool runonce { false };
    while( fTime50Hz >= 1.0 / 50.0 ) {
+#ifdef _WIN32
        Console::Update(); // to i tak trzeba wywoływać
+#endif
        ui::Transcripts.Update(); // obiekt obsługujący stenogramy dźwięków na ekranie
        m_userinterface->update();
        // decelerate camera
@@ -354,8 +371,8 @@ void
 driver_mode::enter() {

    TDynamicObject *nPlayerTrain { (
-        ( Global.asHumanCtrlVehicle != "ghostview" ) ?
-            simulation::Vehicles.find( Global.asHumanCtrlVehicle ) :
+        ( Global.local_start_vehicle != "ghostview" ) ?
+            simulation::Vehicles.find( Global.local_start_vehicle ) :
            nullptr ) };

    Camera.Init(Global.FreeCameraInit[0], Global.FreeCameraInitAngle[0], nPlayerTrain );
@@ -364,32 +381,17 @@ driver_mode::enter() {

    if (nPlayerTrain)
    {
-        WriteLog( "Initializing player train, \"" + Global.asHumanCtrlVehicle + "\"" );
+		WriteLog( "Trying to enter player train, \"" + Global.local_start_vehicle + "\"" );

-        if( simulation::Train == nullptr ) {
-            simulation::Train = new TTrain();
-        }
-        if( simulation::Train->Init( nPlayerTrain ) )
-        {
-            WriteLog("Player train initialization OK");
-
-            Application.set_title( Global.AppName + " (" + simulation::Train->Controlled()->Name + " @ " + Global.SceneryFile + ")" );
-
-            CabView();
-        }
-        else
-        {
-            Error("Bad init: player train initialization failed");
-            FreeFlyModeFlag = true; // Ra: automatycznie włączone latanie
-            SafeDelete( simulation::Train );
-            Camera.m_owner = nullptr;
-        }
+        FreeFlyModeFlag = true; // HACK: entervehicle won't work if the simulation thinks we're outside
+        m_relay.post(user_command::entervehicle, 0.0, 0.0, GLFW_PRESS, 0, nPlayerTrain->GetPosition());
+		change_train = nPlayerTrain->name();
    }
    else
    {
-        if (Global.asHumanCtrlVehicle != "ghostview")
+        if (Global.local_start_vehicle != "ghostview")
        {
-            Error("Bad scenario: failed to locate player train, \"" + Global.asHumanCtrlVehicle + "\"" );
+            Error("Bad scenario: failed to locate player train, \"" + Global.local_start_vehicle + "\"" );
        }
        FreeFlyModeFlag = true; // Ra: automatycznie włączone latanie
        Camera.m_owner = nullptr;
@@ -459,6 +461,11 @@ driver_mode::on_key( int const Key, int const Scancode, int const Action, int co
    }
 }

+void
+driver_mode::on_char( unsigned int const Char ) {
+    // TODO: implement
+}
+
 void
 driver_mode::on_cursor_pos( double const Horizontal, double const Vertical ) {

@@ -498,6 +505,12 @@ driver_mode::on_event_poll() {
    m_input.poll();
 }

+bool
+driver_mode::is_command_processor() {
+
+    return true;
+}
+
 void
 driver_mode::update_camera( double const Deltatime ) {

@@ -759,7 +772,7 @@ driver_mode::OnKeyDown(int cKey) {
            // z [Shift] uruchomienie eventu
            if( ( Global.iPause == 0 ) // podczas pauzy klawisze nie działają
             && ( KeyEvents[ i ] != nullptr ) ) {
-                simulation::Events.AddToQuery( KeyEvents[ i ], NULL );
+				m_relay.post(user_command::queueevent, 0.0, 0.0, GLFW_PRESS, 0, glm::vec3(0.0f), &KeyEvents[i]->name());
            }
        }
        else if( Global.ctrlState ) {
@@ -794,21 +807,6 @@ driver_mode::OnKeyDown(int cKey) {

    switch (cKey) {

-        case GLFW_KEY_F1: {
-
-            if( DebugModeFlag ) {
-                // additional simulation clock jump keys in debug mode
-                if( Global.ctrlState ) {
-                    // ctrl-f1
-                    simulation::Time.update( 20.0 * 60.0 );
-                }
-                else if( Global.shiftState ) {
-                    // shift-f1
-                    simulation::Time.update( 5.0 * 60.0 );
-                }
-            }
-            break;
-        }
        case GLFW_KEY_F4: {
            
            if( Global.shiftState ) { ExternalView(); } // with Shift, cycle through external views 
@@ -817,6 +815,19 @@ driver_mode::OnKeyDown(int cKey) {
        }
        case GLFW_KEY_F5: {
            // przesiadka do innego pojazdu
+            if (!FreeFlyModeFlag)
+				// only available in free fly mode
+				break;
+
+			TDynamicObject *dynamic = std::get<TDynamicObject *>( simulation::Region->find_vehicle( Global.pCamera.Pos, 50, false, false ) );
+			if (dynamic) {
+				m_relay.post(user_command::entervehicle, 0.0, 0.0, GLFW_PRESS, 0);
+
+				change_train = dynamic->name();
+			}
+
+            break;
+/*
            if( false == FreeFlyModeFlag ) {
                // only available in free fly mode
                break;
@@ -872,12 +883,10 @@ driver_mode::OnKeyDown(int cKey) {
                                // we can simply move the 'human' controller to the new vehicle
                                Global.changeDynObj = targetvehicle;
                                // TODO: choose active cab based on camera's location relative to vehicle's location
-/*
-                                Global.changeDynObj->MoverParameters->CabOccupied = (
-                                    Train->DynamicObject->MoverParameters->Neighbours[ exitdirection ].vehicle_end ?
-                                    -1 :
-                                     1 );
-*/
+//                                Global.changeDynObj->MoverParameters->CabOccupied = (
+//                                    Train->DynamicObject->MoverParameters->Neighbours[ exitdirection ].vehicle_end ?
+//                                    -1 :
+//                                     1 );
                            }
                        }
                    }
@@ -905,6 +914,7 @@ driver_mode::OnKeyDown(int cKey) {
                }
            }
            break;
+*/
        }
        case GLFW_KEY_F6: {
            // przyspieszenie symulacji do testowania scenerii... uwaga na FPS!
@@ -954,66 +964,6 @@ driver_mode::OnKeyDown(int cKey) {
            }
            break;
        }
-        case GLFW_KEY_F12: {
-            // quick debug mode toggle
-            if( Global.ctrlState
-             && Global.shiftState ) {
-                DebugModeFlag = !DebugModeFlag;
-            }
-            break;
-        }
-
-        case GLFW_KEY_LEFT_BRACKET:
-        case GLFW_KEY_RIGHT_BRACKET:
-        case GLFW_KEY_TAB: {
-            // consist movement in debug mode
-            if( ( true == DebugModeFlag )
-             && ( false == Global.shiftState )
-             && ( true == Global.ctrlState )
-             && ( simulation::Train != nullptr )
-             && ( simulation::Train->Dynamic()->Controller == Humandriver ) ) {
-
-                if( DebugModeFlag ) {
-                    // przesuwanie składu o 100m
-                    auto *vehicle { simulation::Train->Dynamic() };
-                    TDynamicObject *d = vehicle;
-                    if( cKey == GLFW_KEY_LEFT_BRACKET ) {
-                        while( d ) {
-                            d->Move( 100.0 * d->DirectionGet() );
-                            d = d->Next(); // pozostałe też
-                        }
-                        d = vehicle->Prev();
-                        while( d ) {
-                            d->Move( 100.0 * d->DirectionGet() );
-                            d = d->Prev(); // w drugą stronę też
-                        }
-                    }
-                    else if( cKey == GLFW_KEY_RIGHT_BRACKET ) {
-                        while( d ) {
-                            d->Move( -100.0 * d->DirectionGet() );
-                            d = d->Next(); // pozostałe też
-                        }
-                        d = vehicle->Prev();
-                        while( d ) {
-                            d->Move( -100.0 * d->DirectionGet() );
-                            d = d->Prev(); // w drugą stronę też
-                        }
-                    }
-                    else if( cKey == GLFW_KEY_TAB ) {
-                        while( d ) {
-                            d->MoverParameters->V += d->DirectionGet()*2.78;
-                            d = d->Next(); // pozostałe też
-                        }
-                        d = vehicle->Prev();
-                        while( d ) {
-                            d->MoverParameters->V += d->DirectionGet()*2.78;
-                            d = d->Prev(); // w drugą stronę też
-                        }
-                    }
-                }
-            }
-            break;
-        }

        default: {
            break;
@@ -1267,7 +1217,7 @@ driver_mode::ChangeDynamic() {
    vehicle = train->Dynamic();
    occupied = train->Occupied();
    driver = vehicle->Mechanik;
-    Global.asHumanCtrlVehicle = vehicle->name();
+    Global.local_start_vehicle = vehicle->name();
    if( driver ) // AI może sobie samo pójść
        if( false == driver->AIControllFlag ) // tylko jeśli ręcznie prowadzony
        {
--- a/drivermode.h
+++ b/drivermode.h
@@ -41,6 +41,8 @@ public:
    // input handlers
    void
        on_key( int const Key, int const Scancode, int const Action, int const Mods ) override;
+    void
+        on_char( unsigned int const Char ) override;
    void
        on_cursor_pos( double const Horizontal, double const Vertical ) override;
    void
@@ -49,6 +51,8 @@ public:
        on_scroll( double const Xoffset, double const Yoffset ) override;
    void
        on_event_poll() override;
+    bool
+        is_command_processor() override;

 private:
 // types
@@ -109,4 +113,6 @@ private:
    double m_primaryupdateaccumulator { m_secondaryupdaterate }; // keeps track of elapsed simulation time, for core fixed step routines
    double m_secondaryupdateaccumulator { m_secondaryupdaterate }; // keeps track of elapsed simulation time, for less important fixed step routines
    int iPause { 0 }; // wykrywanie zmian w zapauzowaniu
+	command_relay m_relay;
+	std::string change_train; // train name awaiting entering
 };
--- a/driveruilayer.cpp
+++ b/driveruilayer.cpp
@@ -47,22 +47,6 @@ driver_ui::driver_ui() {
 bool
 driver_ui::on_key_( int const Key, int const Scancode, int const Action, int const Mods ) {

-    if( Key == GLFW_KEY_ESCAPE ) {
-        // toggle pause
-        if( Action != GLFW_PRESS ) { return true; } // recognized, but ignored
-
-        if( Global.iPause & 1 ) {
-            // jeśli pauza startowa
-            // odpauzowanie, gdy po wczytaniu miało nie startować
-            Global.iPause ^= 1;
-        }
-        else if( ( Global.iMultiplayer & 2 ) == 0 ) {
-            // w multiplayerze pauza nie ma sensu
-            Global.iPause ^= 2; // zmiana stanu zapauzowania
-        }
-        return true;
-    }
-
    // if the pause is on ignore block other input
    if( m_paused ) { return true; }

@@ -192,12 +176,13 @@ driver_ui::render_() {
            auto const popupwidth{ locale::strings[ locale::string::driver_pause_header ].size() * 7 };
            if( ImGui::Button( locale::strings[ locale::string::driver_pause_resume ].c_str(), ImVec2( popupwidth, 0 ) ) ) {
                ImGui::CloseCurrentPopup();
-                auto const pausemask { 1 | 2 };
-                Global.iPause &= ~pausemask;
+                command_relay commandrelay;
+    			commandrelay.post(user_command::pausetoggle, 0.0, 0.0, GLFW_PRESS, 0);
            }
            if( ImGui::Button( locale::strings[ locale::string::driver_pause_quit ].c_str(), ImVec2( popupwidth, 0 ) ) ) {
                ImGui::CloseCurrentPopup();
-                glfwSetWindowShouldClose( m_window, 1 );
+                command_relay commandrelay;
+    			commandrelay.post(user_command::quitsimulation, 0.0, 0.0, GLFW_PRESS, 0);
            }
            ImGui::EndPopup();
        }
--- a/editormode.cpp
+++ b/editormode.cpp
@@ -181,6 +181,11 @@ editor_mode::on_key( int const Key, int const Scancode, int const Action, int co
    }
 }

+void
+editor_mode::on_char( unsigned int const Char ) {
+    // TODO: implement
+}
+
 void
 editor_mode::on_cursor_pos( double const Horizontal, double const Vertical ) {

@@ -266,6 +271,12 @@ editor_mode::on_event_poll() {
    m_input.poll();
 }

+bool
+editor_mode::is_command_processor() {
+
+    return false;
+}
+
 bool
 editor_mode::mode_translation() const {

--- a/editormode.h
+++ b/editormode.h
@@ -37,6 +37,8 @@ public:
    // input handlers
    void
        on_key( int const Key, int const Scancode, int const Action, int const Mods ) override;
+    void
+        on_char( unsigned int const Char ) override;
    void
        on_cursor_pos( double const Horizontal, double const Vertical ) override;
    void
@@ -45,6 +47,8 @@ public:
        on_scroll( double const Xoffset, double const Yoffset ) override;
    void
        on_event_poll() override;
+    bool
+        is_command_processor() override;

 private:
 // types
--- a/maszyna.vcxproj
+++ b/maszyna.vcxproj
@@ -84,10 +84,10 @@
  </PropertyGroup>
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;WIN32_LEAN_AND_MEAN;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <WarningLevel>Level3</WarningLevel>
      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/asio/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
      <PrecompiledHeader>Use</PrecompiledHeader>
      <MultiProcessorCompilation>true</MultiProcessorCompilation>
      <MinimalRebuild>false</MinimalRebuild>
@@ -108,10 +108,10 @@
  </ItemDefinitionGroup>
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
    <ClCompile>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;WIN32_LEAN_AND_MEAN;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <WarningLevel>Level3</WarningLevel>
      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/asio/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
      <PrecompiledHeader>Use</PrecompiledHeader>
      <MultiProcessorCompilation>true</MultiProcessorCompilation>
      <MinimalRebuild>false</MinimalRebuild>
@@ -128,10 +128,10 @@
  </ItemDefinitionGroup>
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
    <ClCompile>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;WIN32_LEAN_AND_MEAN;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <WarningLevel>Level3</WarningLevel>
      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/asio/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
      <PrecompiledHeader>Use</PrecompiledHeader>
      <MultiProcessorCompilation>true</MultiProcessorCompilation>
      <WholeProgramOptimization>true</WholeProgramOptimization>
@@ -151,10 +151,10 @@
  </ItemDefinitionGroup>
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
    <ClCompile>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;WIN32_LEAN_AND_MEAN;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <WarningLevel>Level3</WarningLevel>
      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glew/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)console;$(SolutionDir)mczapkie;$(SolutionDir)ref/glad/include;$(SolutionDir)ref/glfw/include;$(SolutionDir)ref/glm;$(SolutionDir)ref/openal/include;$(SolutionDir)ref/dr_libs/include;$(SolutionDir)ref/imgui;$(SolutionDir)ref/imgui/examples;$(SolutionDir)ref/python/include;$(SolutionDir)ref/libserialport/include;$(SolutionDir)ref/asio/include;$(SolutionDir)ref/stb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
      <PrecompiledHeader>Use</PrecompiledHeader>
      <MultiProcessorCompilation>true</MultiProcessorCompilation>
      <WholeProgramOptimization>true</WholeProgramOptimization>
@@ -234,6 +234,10 @@
    <ClCompile Include="drivermouseinput.cpp" />
    <ClCompile Include="mtable.cpp" />
    <ClCompile Include="Names.cpp" />
+    <ClCompile Include="network\backend\asio.cpp" />
+    <ClCompile Include="network\manager.cpp" />
+    <ClCompile Include="network\message.cpp" />
+    <ClCompile Include="network\network.cpp" />
    <ClCompile Include="opengl33geometrybank.cpp" />
    <ClCompile Include="opengl33light.cpp" />
    <ClCompile Include="opengl33particles.cpp" />
@@ -409,6 +413,10 @@
    <ClInclude Include="drivermouseinput.h" />
    <ClInclude Include="mtable.h" />
    <ClInclude Include="Names.h" />
+    <ClInclude Include="network\backend\asio.h" />
+    <ClInclude Include="network\manager.h" />
+    <ClInclude Include="network\message.h" />
+    <ClInclude Include="network\network.h" />
    <ClInclude Include="opengl33geometrybank.h" />
    <ClInclude Include="opengl33light.h" />
    <ClInclude Include="opengl33particles.h" />
--- a/maszyna.vcxproj.filters
+++ b/maszyna.vcxproj.filters
@@ -70,6 +70,18 @@
    <Filter Include="Source Files\math">
      <UniqueIdentifier>{dd00198e-a316-4bcc-a4d3-916c8dcfe08f}</UniqueIdentifier>
    </Filter>
+    <Filter Include="Source Files\application\network">
+      <UniqueIdentifier>{a41f784b-da5a-40de-a4ec-f9b1da1aa607}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files\application\network">
+      <UniqueIdentifier>{5a6c58fe-4b3c-4a46-8ef0-71d4c08d7ebe}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files\application\network\backend">
+      <UniqueIdentifier>{de8b7596-9589-4320-9008-15e15ebf1d8f}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Source Files\application\network\backend">
+      <UniqueIdentifier>{db0ac2d6-9a5d-412e-87b6-8b23c8f8b7a7}</UniqueIdentifier>
+    </Filter>
  </ItemGroup>
  <ItemGroup>
    <ClCompile Include="AirCoupler.cpp">
@@ -441,6 +453,18 @@
    <ClCompile Include="opengl33geometrybank.cpp">
      <Filter>Source Files\gfx</Filter>
    </ClCompile>
+    <ClCompile Include="network\network.cpp">
+      <Filter>Source Files\application\network</Filter>
+    </ClCompile>
+    <ClCompile Include="network\manager.cpp">
+      <Filter>Source Files\application\network</Filter>
+    </ClCompile>
+    <ClCompile Include="network\message.cpp">
+      <Filter>Source Files\application\network</Filter>
+    </ClCompile>
+    <ClCompile Include="network\backend\asio.cpp">
+      <Filter>Source Files\application\network\backend</Filter>
+    </ClCompile>
  </ItemGroup>
  <ItemGroup>
    <ClInclude Include="Globals.h">
@@ -812,6 +836,18 @@
    <ClInclude Include="stars.h">
      <Filter>Header Files\gfx</Filter>
    </ClInclude>
+    <ClInclude Include="network\manager.h">
+      <Filter>Header Files\application\network</Filter>
+    </ClInclude>
+    <ClInclude Include="network\message.h">
+      <Filter>Header Files\application\network</Filter>
+    </ClInclude>
+    <ClInclude Include="network\network.h">
+      <Filter>Header Files\application\network</Filter>
+    </ClInclude>
+    <ClInclude Include="network\backend\asio.h">
+      <Filter>Header Files\application\network\backend</Filter>
+    </ClInclude>
  </ItemGroup>
  <ItemGroup>
    <ResourceCompile Include="maszyna.rc">
--- a/messaging.cpp
+++ b/messaging.cpp
@@ -68,7 +68,8 @@ OnCommandGet(multiplayer::DaneRozkaz *pRozkaz)
                     || ( typeid( *event ) == typeid( lights_event ) )
                     || ( event->m_sibling != 0 ) ) {
                        // tylko jawne albo niejawne Multiple
-                        simulation::Events.AddToQuery( event, nullptr ); // drugi parametr to dynamic wywołujący - tu brak
+						command_relay relay;
+						relay.post(user_command::queueevent, 0.0, 0.0, GLFW_PRESS, 0, glm::vec3(0.0f), &event->name());
                    }
                }
            }
@@ -139,7 +140,7 @@ OnCommandGet(multiplayer::DaneRozkaz *pRozkaz)
                    // jeśli długość nazwy jest niezerowa szukamy pierwszego pojazdu o takiej nazwie i odsyłamy parametry ramką #7
                    auto *vehicle = (
                        pRozkaz->cString[ 1 ] == '*' ?
-                            simulation::Vehicles.find( Global.asHumanCtrlVehicle ) :
+                            simulation::Vehicles.find( Global.local_start_vehicle ) :
                            simulation::Vehicles.find( std::string{ pRozkaz->cString + 1, (unsigned)pRozkaz->cString[ 0 ] } ) );
                    if( vehicle != nullptr ) {
                        WyslijNamiary( vehicle ); // wysłanie informacji o pojeździe
@@ -180,7 +181,7 @@ OnCommandGet(multiplayer::DaneRozkaz *pRozkaz)
            { // szukamy pierwszego pojazdu o takiej nazwie i odsyłamy parametry ramką #13
                auto *lookup = (
                    pRozkaz->cString[ 2 ] == '*' ?
-                        simulation::Vehicles.find( Global.asHumanCtrlVehicle ) : // nazwa pojazdu użytkownika
+                        simulation::Vehicles.find( Global.local_start_vehicle ) : // nazwa pojazdu użytkownika
                        simulation::Vehicles.find( std::string( pRozkaz->cString + 2, (unsigned)pRozkaz->cString[ 1 ] ) ) ); // nazwa pojazdu
                if( lookup == nullptr ) { break; } // nothing found, nothing to do
                auto *d { lookup };
--- a/network/backend/asio.cpp
+++ b/network/backend/asio.cpp
@@ -0,0 +1,244 @@
+#include "stdafx.h"
+#include "network/backend/asio.h"
+
+#include "sn_utils.h"
+#include "Logs.h"
+
+network::tcp::connection::connection(asio::io_context &io_ctx, bool client, size_t counter)
+    : network::connection(client, counter),
+      m_socket(io_ctx)
+{
+	m_header_buffer.resize(8);
+}
+
+network::tcp::connection::~connection()
+{
+	m_socket.shutdown(m_socket.shutdown_both);
+	m_socket.close();
+}
+
+void network::tcp::connection::disconnect()
+{
+	network::connection::disconnect();
+}
+
+void network::tcp::connection::send_data(std::shared_ptr<std::string> buffer)
+{
+	asio::async_write(m_socket, asio::buffer(*buffer.get()), std::bind(&connection::send_complete, this, buffer));
+}
+
+void network::tcp::connection::connected()
+{
+	network::connection::connected();
+	read_header();
+}
+
+void network::tcp::connection::read_header()
+{
+	asio::async_read(m_socket, asio::buffer(m_header_buffer),
+	                    std::bind(&connection::handle_header, this,
+	                              std::placeholders::_1, std::placeholders::_2));
+}
+
+void network::tcp::connection::handle_header(const asio::error_code &err, size_t bytes_transferred)
+{
+	if (err) {
+		disconnect();
+		return;
+	}
+
+	std::istringstream header(m_header_buffer);
+	if (m_header_buffer.size() != bytes_transferred) {
+		disconnect();
+		return;
+	}
+
+	uint32_t sig = sn_utils::ld_uint32(header);
+	if (sig != NETWORK_MAGIC) {
+		disconnect();
+		return;
+	}
+
+	uint32_t len = sn_utils::ld_uint32(header);
+	m_body_buffer.resize(len);
+	if (len > MAX_MSG_SIZE) {
+		disconnect();
+		return;
+	}
+
+	asio::async_read(m_socket, asio::buffer(m_body_buffer),
+	                 std::bind(&connection::handle_data, this, std::placeholders::_1, std::placeholders::_2));
+}
+
+void network::tcp::connection::handle_data(const asio::error_code &err, size_t bytes_transferred)
+{
+	if (err) {
+		disconnect();
+		return;
+	}
+
+	if (m_body_buffer.size() != bytes_transferred) {
+		disconnect();
+		return;
+	}
+
+	std::istringstream stream(m_body_buffer);
+	std::shared_ptr<message> msg = deserialize_message(stream);
+	if (message_handler)
+		message_handler(*msg);
+
+	read_header();
+}
+
+void network::tcp::connection::write_message(const message &msg, std::ostream &stream)
+{
+	size_t beg = (size_t)stream.tellp();
+
+	sn_utils::ls_uint32(stream, NETWORK_MAGIC);
+	sn_utils::ls_uint32(stream, 0);
+
+	serialize_message(msg, stream);
+
+	size_t size = (size_t)stream.tellp() - beg - 8;
+	if (size > MAX_MSG_SIZE) {
+		ErrorLog("net: message too big", logtype::net);
+		return;
+	}
+	stream.seekp(beg + 4, std::ios_base::beg);
+	sn_utils::ls_uint32(stream, size);
+
+	stream.seekp(0, std::ios_base::end);
+}
+
+void network::tcp::connection::send_messages(const std::vector<std::shared_ptr<message> > &messages)
+{
+	if (messages.size() == 0)
+		return;
+
+	std::ostringstream stream;
+	for (auto const &msg : messages)
+		write_message(*msg.get(), stream);
+
+	stream.flush();
+	send_data(std::make_shared<std::string>(stream.str()));
+}
+
+void network::tcp::connection::send_message(const message &msg)
+{
+	std::ostringstream stream;
+	write_message(msg, stream);
+
+	stream.flush();
+	send_data(std::make_shared<std::string>(stream.str()));
+}
+
+// -----------------
+
+network::tcp::server::server(std::shared_ptr<std::istream> buf, asio::io_context &io_ctx, const std::string &host, uint32_t port)
+    : network::server(buf), m_acceptor(io_ctx)
+{
+	auto endpoint = asio::ip::tcp::endpoint(asio::ip::address::from_string(host), port);
+	m_acceptor.open(endpoint.protocol());
+	m_acceptor.set_option(asio::socket_base::reuse_address(true));
+	m_acceptor.set_option(asio::ip::tcp::no_delay(true));
+	m_acceptor.bind(endpoint);
+	m_acceptor.listen(10);
+
+	accept_conn();
+}
+
+void network::tcp::server::accept_conn()
+{
+	std::shared_ptr<connection> conn = std::make_shared<connection>(m_acceptor.get_executor().context());
+	conn->set_handler(std::bind(&server::handle_message, this, conn, std::placeholders::_1));
+
+	m_acceptor.async_accept(conn->m_socket, std::bind(&server::handle_accept, this, conn, std::placeholders::_1));
+}
+
+void network::tcp::server::handle_accept(std::shared_ptr<connection> conn, const asio::error_code &err)
+{
+	if (!err)
+	{
+		clients.emplace_back(conn);
+		conn->connected();
+	}
+	else
+	{
+		conn->state = connection::DEAD;
+		WriteLog(std::string("net: failed to accept client: " + err.message()), logtype::net);
+	}
+
+	accept_conn();
+}
+
+// ------------------
+
+network::tcp::client::client(asio::io_context &io_ctxx, const std::string &hostarg, uint32_t portarg)
+    : host(hostarg), port(portarg), io_ctx(io_ctxx)
+{
+}
+
+void network::tcp::client::connect()
+{
+	if (this->conn)
+		return;
+
+	std::shared_ptr<connection> conn = std::make_shared<connection>(io_ctx, true, resume_frame_counter);
+	conn->set_handler(std::bind(&client::handle_message, this, conn, std::placeholders::_1));
+
+	asio::ip::tcp::endpoint endpoint(
+	            asio::ip::address::from_string(host), port);
+	conn->m_socket.open(endpoint.protocol());
+	conn->m_socket.set_option(asio::ip::tcp::no_delay(true));
+	conn->m_socket.async_connect(endpoint,
+	                    std::bind(&client::handle_accept, this, std::placeholders::_1));
+
+	this->conn = conn;
+
+}
+
+void network::tcp::client::handle_accept(const asio::error_code &err)
+{
+	if (!err)
+	{
+		conn->connected();
+	}
+	else
+	{
+		WriteLog(std::string("net: failed to connect: " + err.message()), logtype::net);
+		conn->disconnect();
+	}
+}
+
+network::tcp::asio_manager::asio_manager() {
+	backend_list().emplace("tcp", this);
+}
+
+std::shared_ptr<network::server> network::tcp::asio_manager::create_server(std::shared_ptr<std::fstream> backbuffer, const std::string &conf) {
+	std::istringstream stream(conf);
+
+	std::string host;
+	std::getline(stream, host, ':');
+
+	int port;
+	stream >> port;
+
+	return std::make_shared<tcp::server>(backbuffer, io_context, host, port);
+}
+
+std::shared_ptr<network::client> network::tcp::asio_manager::create_client(const std::string &conf) {
+	std::istringstream stream(conf);
+
+	std::string host;
+	std::getline(stream, host, ':');
+
+	int port;
+	stream >> port;
+
+	return std::make_shared<tcp::client>(io_context, host, port);
+}
+
+void network::tcp::asio_manager::update() {
+	io_context.restart();
+	io_context.poll();
+}
--- a/network/backend/asio.h
+++ b/network/backend/asio.h
@@ -0,0 +1,82 @@
+#define ASIO_STANDALONE
+
+#ifdef DBG_NEW
+#undef new
+#endif
+
+#include <asio.hpp>
+
+#include "network/network.h"
+
+namespace network::tcp
+{
+    const uint32_t NETWORK_MAGIC = 0x37305545;
+	const uint32_t MAX_MSG_SIZE = 100000;
+
+	class connection : public network::connection
+	{
+		friend class server;
+		friend class client;
+
+	public:
+		connection(asio::io_context &io_ctx, bool client = false, size_t counter = 0);
+		~connection();
+
+		virtual void connected() override;
+		virtual void disconnect() override;
+		virtual void send_messages(const std::vector<std::shared_ptr<message> > &messages) override;
+		virtual void send_message(const message &msg) override;
+
+		asio::ip::tcp::socket m_socket;
+
+	private:
+		std::string m_header_buffer;
+		std::string m_body_buffer;
+
+		void write_message(const message &msg, std::ostream &stream);
+		void send_data(std::shared_ptr<std::string> buffer);
+		void read_header();
+		void handle_header(const asio::error_code &err, size_t bytes_transferred);
+		void handle_data(const asio::error_code &err, size_t bytes_transferred);
+	};
+
+	class server : public network::server
+	{
+	private:
+		void accept_conn();
+		void handle_accept(std::shared_ptr<connection> conn, const asio::error_code &err);
+
+		asio::ip::tcp::acceptor m_acceptor;
+
+	public:
+		server(std::shared_ptr<std::istream> buf, asio::io_context &io_ctx, const std::string &host, uint32_t port);
+	};
+
+	class client : public network::client
+	{
+	private:
+		void handle_accept(const asio::error_code &err);
+		asio::io_context &io_ctx;
+		std::string host;
+		uint32_t port;
+
+	protected:
+		virtual void connect() override;
+
+	public:
+		client(asio::io_context &io_ctx, const std::string &host, uint32_t port);
+	};
+
+	class asio_manager : public network::backend_manager {
+		asio::io_context io_context;
+
+	public:
+		asio_manager();
+
+		virtual std::shared_ptr<network::server> create_server(std::shared_ptr<std::fstream>, const std::string &conf) override;
+		virtual std::shared_ptr<network::client> create_client(const std::string &conf) override;
+		virtual void update() override;
+	};
+
+	asio_manager manager;
+}
--- a/network/manager.cpp
+++ b/network/manager.cpp
@@ -0,0 +1,89 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#include "stdafx.h"
+#include "network/manager.h"
+
+#include "simulation.h"
+#include "Logs.h"
+
+network::server_manager::server_manager()
+{
+	backbuffer = std::make_shared<std::fstream>("backbuffer.bin", std::ios::out | std::ios::in | std::ios::trunc | std::ios::binary);
+}
+
+command_queue::commands_map network::server_manager::pop_commands()
+{
+	command_queue::commands_map map;
+
+	for (auto srv : servers)
+		add_to_dequemap(map, srv->pop_commands());
+
+	return map;
+}
+
+void network::server_manager::push_delta(double render_dt, double dt, double sync, const command_queue::commands_map &commands)
+{
+	if (dt == 0.0 && commands.empty())
+		return;
+
+	frame_info msg;
+	msg.render_dt = render_dt;
+	msg.dt = dt;
+	msg.sync = sync;
+	msg.commands = commands;
+
+	for (auto srv : servers)
+		srv->push_delta(msg);
+
+	serialize_message(msg, *backbuffer.get());
+}
+
+void network::server_manager::create_server(const std::string &backend, const std::string &conf)
+{
+	auto it = backend_list().find(backend);
+	if (it == backend_list().end()) {
+		ErrorLog("net: unknown backend: " + backend);
+		return;
+	}
+
+	servers.emplace_back(it->second->create_server(backbuffer, conf));
+}
+
+network::manager::manager()
+{
+}
+
+void network::manager::update()
+{
+	for (auto &backend : backend_list())
+		backend.second->update();
+
+	if (client)
+		client->update();
+}
+
+void network::manager::create_server(const std::string &backend, const std::string &conf)
+{
+	servers.emplace();
+	servers->create_server(backend, conf);
+}
+
+void network::manager::connect(const std::string &backend, const std::string &conf)
+{
+	auto it = backend_list().find(backend);
+	if (it == backend_list().end()) {
+		ErrorLog("net: unknown backend: " + backend);
+		return;
+	}
+
+	client = it->second->create_client(conf);
+}
+
+//std::unordered_map<std::string, std::shared_ptr<network::backend_manager>> network::backend_list;
--- a/network/manager.h
+++ b/network/manager.h
@@ -0,0 +1,34 @@
+#pragma once
+#include <memory>
+#include "network/network.h"
+#include "command.h"
+
+namespace network
+{
+    class server_manager
+	{
+	private:
+		std::vector<std::shared_ptr<server>> servers;
+		std::shared_ptr<std::fstream> backbuffer;
+
+	public:
+		server_manager();
+
+		void push_delta(double render_dt, double dt, double sync, const command_queue::commands_map &commands);
+		command_queue::commands_map pop_commands();
+		void create_server(const std::string &backend, const std::string &conf);
+	};
+
+    class manager
+	{
+	public:
+		manager();
+
+		std::optional<server_manager> servers;
+		std::shared_ptr<network::client> client;
+
+		void create_server(const std::string &backend, const std::string &conf);
+		void connect(const std::string &backend, const std::string &conf);
+		void update();
+	};
+}
--- a/network/message.cpp
+++ b/network/message.cpp
@@ -0,0 +1,124 @@
+#include "stdafx.h"
+#include "network/message.h"
+#include "sn_utils.h"
+
+void network::client_hello::serialize(std::ostream &stream) const
+{
+	sn_utils::ls_int32(stream, version);
+	sn_utils::ls_uint32(stream, start_packet);
+}
+
+void network::client_hello::deserialize(std::istream &stream)
+{
+	version = sn_utils::ld_int32(stream);
+	start_packet = sn_utils::ld_uint32(stream);
+}
+
+void network::server_hello::serialize(std::ostream &stream) const
+{
+	sn_utils::ls_uint32(stream, seed);
+	sn_utils::ls_int64(stream, timestamp);
+}
+
+void network::server_hello::deserialize(std::istream &stream)
+{
+	seed = sn_utils::ld_uint32(stream);
+	timestamp = sn_utils::ld_int64(stream);
+}
+
+void ::network::request_command::serialize(std::ostream &stream) const
+{
+	sn_utils::ls_uint32(stream, commands.size());
+	for (auto const &kv : commands)
+	{
+		sn_utils::ls_uint32(stream, kv.first);
+		sn_utils::ls_uint32(stream, kv.second.size());
+		for (command_data const &data : kv.second)
+		{
+			sn_utils::ls_uint32(stream, (uint32_t)data.command);
+			sn_utils::ls_int32(stream, data.action);
+			sn_utils::ls_float64(stream, data.param1);
+			sn_utils::ls_float64(stream, data.param2);
+			sn_utils::ls_float64(stream, data.time_delta);
+
+			sn_utils::s_bool(stream, data.freefly);
+			sn_utils::s_vec3(stream, data.location);
+
+			sn_utils::s_str(stream, data.payload);
+		}
+	}
+}
+
+void network::request_command::deserialize(std::istream &stream)
+{
+	uint32_t commands_size = sn_utils::ld_uint32(stream);
+	for (uint32_t i = 0; i < commands_size; i++)
+	{
+		uint32_t recipient = sn_utils::ld_uint32(stream);
+		uint32_t sequence_size = sn_utils::ld_uint32(stream);
+
+		command_queue::commanddata_sequence sequence;
+		for (uint32_t i = 0; i < sequence_size; i++)
+		{
+			command_data data;
+			data.command = (user_command)sn_utils::ld_uint32(stream);
+			data.action = sn_utils::ld_int32(stream);
+			data.param1 = sn_utils::ld_float64(stream);
+			data.param2 = sn_utils::ld_float64(stream);
+			data.time_delta = sn_utils::ld_float64(stream);
+
+			data.freefly = sn_utils::d_bool(stream);
+			data.location = sn_utils::d_vec3(stream);
+
+			data.payload = sn_utils::d_str(stream);
+
+			sequence.emplace_back(data);
+		}
+
+		commands.emplace(recipient, sequence);
+	}
+}
+
+void network::frame_info::serialize(std::ostream &stream) const
+{
+	sn_utils::ls_float64(stream, render_dt);
+	sn_utils::ls_float64(stream, dt);
+	sn_utils::ls_float64(stream, sync);
+
+	request_command::serialize(stream);
+}
+
+void network::frame_info::deserialize(std::istream &stream)
+{
+	render_dt = sn_utils::ld_float64(stream);
+	dt = sn_utils::ld_float64(stream);
+	sync = sn_utils::ld_float64(stream);
+
+	request_command::deserialize(stream);
+}
+
+std::shared_ptr<network::message> network::deserialize_message(std::istream &stream)
+{
+	message::type_e type = (message::type_e)sn_utils::ld_uint16(stream);
+
+	std::shared_ptr<message> msg;
+
+	if (type == message::CLIENT_HELLO)
+		msg = std::make_shared<client_hello>();
+	else if (type == message::SERVER_HELLO)
+		msg = std::make_shared<server_hello>();
+	else if (type == message::FRAME_INFO)
+		msg = std::make_shared<frame_info>();
+	else if (type == message::REQUEST_COMMAND)
+		msg = std::make_shared<request_command>();
+
+	msg->deserialize(stream);
+
+	return msg;
+}
+
+void network::serialize_message(const message &msg, std::ostream &stream)
+{
+	sn_utils::ls_uint16(stream, (uint16_t)msg.type);
+	msg.serialize(stream);
+}
--- a/network/message.h
+++ b/network/message.h
@@ -0,0 +1,73 @@
+#pragma once
+#include "network/message.h"
+#include "command.h"
+#include <queue>
+
+namespace network
+{
+struct message
+{
+	enum type_e
+	{
+		CLIENT_HELLO = 0,
+		SERVER_HELLO,
+		FRAME_INFO,
+		REQUEST_COMMAND,
+		TYPE_MAX
+	};
+
+	type_e type;
+
+	message(type_e t) : type(t) {}
+	virtual void serialize(std::ostream &stream) const {}
+	virtual void deserialize(std::istream &stream) {}
+};
+
+struct client_hello : public message
+{
+	client_hello() : message(CLIENT_HELLO) {}
+
+	virtual void serialize(std::ostream &stream) const override;
+	virtual void deserialize(std::istream &stream) override;
+
+	int32_t version;
+	uint32_t start_packet;
+};
+
+struct server_hello : public message
+{
+	server_hello() : message(SERVER_HELLO) {}
+
+	uint32_t seed;
+	int64_t timestamp;
+
+	virtual void serialize(std::ostream &stream) const override;
+	virtual void deserialize(std::istream &stream) override;
+};
+
+struct request_command : public message
+{
+	request_command(type_e type) : message(type) {}
+	request_command() : message(REQUEST_COMMAND) {}
+
+	command_queue::commands_map commands;
+
+	virtual void serialize(std::ostream &stream) const override;
+	virtual void deserialize(std::istream &stream) override;
+};
+
+struct frame_info : public request_command
+{
+	frame_info() : request_command(FRAME_INFO) {}
+
+	double render_dt;
+	double dt;
+	double sync;
+
+	virtual void serialize(std::ostream &stream) const override;
+	virtual void deserialize(std::istream &stream) override;
+};
+
+std::shared_ptr<message> deserialize_message(std::istream &stream);
+void serialize_message(const message &msg, std::ostream &stream);
+} // namespace network
--- a/network/network.cpp
+++ b/network/network.cpp
@@ -0,0 +1,269 @@
+#include "stdafx.h"
+#include "network/network.h"
+#include "network/message.h"
+#include "Logs.h"
+#include "sn_utils.h"
+#include "Timer.h"
+#include "application.h"
+#include "Globals.h"
+
+namespace network {
+
+backend_list_t& backend_list() {
+    // HACK: static initialization order fiasco fix
+    // NOTE: potential static deinitialization order fiasco
+    static backend_list_t backend_list;
+    return backend_list;
+}
+
+}
+// connection
+
+void network::connection::disconnect() {
+	WriteLog("net: peer dropped", logtype::net);
+	state = DEAD;
+}
+
+void network::connection::set_handler(std::function<void (const message &)> handler) {
+	message_handler = handler;
+}
+
+network::connection::connection(bool client, size_t counter) {
+	packet_counter = counter;
+	is_client = client;
+	state = AWAITING_HELLO;
+}
+
+void network::connection::connected()
+{
+	WriteLog("net: socket connected", logtype::net);
+
+	if (is_client) {
+		client_hello msg;
+		msg.version = 1;
+		msg.start_packet = packet_counter;
+		send_message(msg);
+	}
+}
+
+void network::connection::catch_up()
+{
+	backbuffer->seekg(backbuffer_pos);
+
+	std::vector<std::shared_ptr<message>> messages;
+
+	for (int i = 0; i < CATCHUP_PACKETS; i++) {
+		if (backbuffer->peek() == EOF) {
+			send_messages(messages);
+			state = ACTIVE;
+			backbuffer->seekg(0, std::ios_base::end);
+			return;
+		}
+
+		auto msg = deserialize_message(*backbuffer.get());
+
+		if (packet_counter) {
+			packet_counter--;
+			i--; // TODO: it would be better to skip frames in chunks
+			continue;
+		}
+
+		messages.push_back(msg);
+	}
+
+	backbuffer_pos = backbuffer->tellg();
+	backbuffer->seekg(0, std::ios_base::end);
+
+	send_messages(messages);
+}
+
+void network::connection::send_complete(std::shared_ptr<std::string> buf)
+{
+	if (!is_client && state == CATCHING_UP) {
+		catch_up();
+	}
+}
+
+// --------------
+
+// server
+network::server::server(std::shared_ptr<std::istream> buf) : backbuffer(buf)
+{
+
+}
+
+void network::server::push_delta(const frame_info &msg)
+{
+	for (auto it = clients.begin(); it != clients.end(); ) {
+		if ((*it)->state == connection::DEAD) {
+			it = clients.erase(it);
+			continue;
+		}
+
+		if ((*it)->state == connection::ACTIVE)
+			(*it)->send_message(msg);
+
+		it++;
+	}
+}
+
+command_queue::commands_map network::server::pop_commands()
+{
+	command_queue::commands_map map(client_commands_queue);
+	client_commands_queue.clear();
+	return map;
+}
+
+void network::server::handle_message(std::shared_ptr<connection> conn, const message &msg)
+{
+	if (msg.type == message::TYPE_MAX)
+	{
+		conn->disconnect();
+		return;
+	}
+
+	if (msg.type == message::CLIENT_HELLO) {
+		auto cmd = dynamic_cast<const client_hello&>(msg);
+
+		if (cmd.version != 1 // wrong version
+		        || !Global.ready_to_load) { // not ready yet
+			conn->disconnect();
+			return;
+		}
+
+		server_hello reply;
+		reply.seed = Global.random_seed;
+		reply.timestamp = Global.starting_timestamp;
+		conn->state = connection::CATCHING_UP;
+		conn->backbuffer = backbuffer;
+		conn->backbuffer_pos = 0;
+		conn->packet_counter = cmd.start_packet;
+
+		conn->send_message(reply);
+
+		WriteLog("net: client accepted", logtype::net);
+	}
+	else if (msg.type == message::REQUEST_COMMAND) {
+		auto cmd = dynamic_cast<const request_command&>(msg);
+
+		for (auto const &kv : cmd.commands)
+			client_commands_queue.emplace(kv);
+	}
+}
+
+// ------------
+
+void network::client::update()
+{
+	if (conn && conn->state == connection::DEAD) {
+		conn.reset();
+	}
+
+	if (!conn) {
+		if (!reconnect_delay) {
+			connect();
+			reconnect_delay = RECONNECT_DELAY_FRAMES;
+		}
+		reconnect_delay--;
+	}
+}
+
+// client
+std::tuple<double, double, command_queue::commands_map> network::client::get_next_delta(int counter)
+{
+	auto now = std::chrono::high_resolution_clock::now();
+	if (counter == 1) {
+		frame_time = now - last_frame;
+		last_frame = now;
+	}
+
+	if (delta_queue.empty()) {
+		// buffer underflow
+		return std::tuple<double, double,
+		        command_queue::commands_map>(0.0, 0.0, command_queue::commands_map());
+	}
+
+
+	float size = delta_queue.size() - consume_counter;
+	auto entry = delta_queue.front();
+	float mult = entry.render_dt / std::chrono::duration_cast<std::chrono::duration<float>>(frame_time).count();
+
+	if (counter == 1 && size < MAX_BUFFER_SIZE * 2.0f) {
+		last_target = last_target * TARGET_MIX +
+		        (std::min(TARGET_MIN + jitteriness * JITTERINESS_MULTIPIER, MAX_BUFFER_SIZE)) * (1.0f - TARGET_MIX);
+		float diff = size - last_target;
+		jitteriness = std::max(jitteriness * JITTERINESS_MIX, std::abs(diff));
+
+		float speed = 1.0f + diff * CONSUME_MULTIPIER;
+
+		consume_counter += speed;
+	}
+
+	float last_rcv_diff = std::chrono::duration_cast<std::chrono::duration<float>>(now - last_rcv).count();
+
+	if (size > MAX_BUFFER_SIZE || consume_counter > mult || last_rcv_diff > 1.0f) {
+		if (consume_counter > mult) {
+			consume_counter = std::clamp(consume_counter - mult, -MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
+		}
+
+		delta_queue.pop();
+
+		return std::make_tuple(entry.dt, entry.sync, entry.commands);
+	} else {
+		// nothing to push
+		return std::tuple<double, double,
+		        command_queue::commands_map>(0.0, 0.0, command_queue::commands_map());
+	}
+}
+
+void network::client::send_commands(command_queue::commands_map commands)
+{
+	if (!conn || conn->state == connection::DEAD || commands.empty())
+		return;
+	// eh, maybe queue lost messages
+
+	request_command msg;
+	msg.commands = commands;
+
+	conn->send_message(msg);
+}
+
+void network::client::handle_message(std::shared_ptr<connection> conn, const message &msg)
+{
+	if (msg.type >= message::TYPE_MAX)
+	{
+		conn->disconnect();
+		return;
+	}
+
+	if (msg.type == message::SERVER_HELLO) {
+		auto cmd = dynamic_cast<const server_hello&>(msg);
+		conn->state = connection::ACTIVE;
+
+		if (!Global.ready_to_load) {
+			Global.random_seed = cmd.seed;
+			Global.random_engine.seed(Global.random_seed);
+			Global.starting_timestamp = cmd.timestamp;
+			Global.ready_to_load = true;
+		} else if (Global.random_seed != cmd.seed) {
+			ErrorLog("net: seed mismatch", logtype::net);
+			conn->disconnect();
+			return;
+		}
+
+		WriteLog("net: accept received", logtype::net);
+	}
+
+	if (conn->state != connection::ACTIVE)
+		return;
+
+	if (msg.type == message::FRAME_INFO) {
+		resume_frame_counter++;
+
+		auto delta = dynamic_cast<const frame_info&>(msg);
+		delta_queue.push(delta);
+		last_rcv = std::chrono::high_resolution_clock::now();
+	}
+}
+
+// --------------
--- a/network/network.h
+++ b/network/network.h
@@ -0,0 +1,122 @@
+#pragma once
+
+#include <memory>
+#include <functional>
+#include <optional>
+#include <queue>
+#include <chrono>
+#include "network/message.h"
+#include "command.h"
+
+namespace network
+{
+    //m7todo: separate client/server connection class?
+    class connection
+	{
+		friend class server;
+		friend class client;
+
+	private:
+		const int CATCHUP_PACKETS = 300;
+
+		bool is_client;
+
+	protected:
+		std::shared_ptr<std::istream> backbuffer;
+		size_t backbuffer_pos;
+		size_t packet_counter;
+
+		void send_complete(std::shared_ptr<std::string> buf);
+		void catch_up();
+
+	public:
+		std::function<void(const message &msg)> message_handler;
+
+		virtual void connected() = 0;
+		virtual void send_message(const message &msg) = 0;
+		virtual void send_messages(const std::vector<std::shared_ptr<message>> &messages) = 0;
+
+		connection(bool client = false, size_t counter = 0);
+		void set_handler(std::function<void(const message &msg)> handler);
+
+		virtual void disconnect() = 0;
+
+		enum peer_state {
+			AWAITING_HELLO,
+			CATCHING_UP,
+			ACTIVE,
+			DEAD
+		};
+		peer_state state;
+	};
+
+	class server
+	{
+	private:
+		std::shared_ptr<std::istream> backbuffer;
+
+	protected:
+		void handle_message(std::shared_ptr<connection> conn, const message &msg);
+
+		std::vector<std::shared_ptr<connection>> clients;
+
+		command_queue::commands_map client_commands_queue;
+
+	public:
+		server(std::shared_ptr<std::istream> buf);
+		void push_delta(const frame_info &msg);
+		command_queue::commands_map pop_commands();
+	};
+
+	class client
+	{
+	protected:
+		virtual void connect() = 0;
+		void handle_message(std::shared_ptr<connection> conn, const message &msg);
+		std::shared_ptr<connection> conn;
+		size_t resume_frame_counter = 0;
+		size_t reconnect_delay = 0;
+
+		const size_t RECONNECT_DELAY_FRAMES = 60;
+		const float MAX_BUFFER_SIZE = 60.0f;
+		const float JITTERINESS_MIX = 0.998f;
+		const float TARGET_MIN = 2.0f;
+		const float TARGET_MIX = 0.98f;
+		const float JITTERINESS_MULTIPIER = 2.0f;
+		const float CONSUME_MULTIPIER = 0.05f;
+
+		std::queue<frame_info> delta_queue;
+
+		float last_target = 20.0f;
+		float jitteriness = 1.0f;
+		float consume_counter = 0.0f;
+
+		std::chrono::high_resolution_clock::time_point last_rcv;
+		std::chrono::high_resolution_clock::time_point last_frame;
+		std::chrono::high_resolution_clock::duration frame_time;
+
+	public:
+		void update();
+		std::tuple<double, double, command_queue::commands_map> get_next_delta(int counter);
+		void send_commands(command_queue::commands_map commands);
+		int get_frame_counter() {
+			return resume_frame_counter;
+		}
+		int get_awaiting_frames() {
+			return delta_queue.size();
+		}
+	};
+
+	class backend_manager
+	{
+	public:
+		virtual std::shared_ptr<server> create_server(std::shared_ptr<std::fstream>, const std::string &conf) = 0;
+		virtual std::shared_ptr<client> create_client(const std::string &conf) = 0;
+		virtual void update() = 0;
+	};
+
+    // HACK: static initialization order fiasco fix
+//	extern std::unordered_map<std::string, backend_manager*> backend_list;
+    using backend_list_t = std::unordered_map<std::string, backend_manager*>;
+    backend_list_t& backend_list();
+}
--- a/scenarioloadermode.cpp
+++ b/scenarioloadermode.cpp
@@ -37,20 +37,33 @@ scenarioloader_mode::init() {
 bool
 scenarioloader_mode::update() {

-    WriteLog( "\nLoading scenario \"" + Global.SceneryFile + "\"..." );
+	if (!Global.ready_to_load)
+		// waiting for network connection
+		return true;

-    auto timestart = std::chrono::system_clock::now();
+	if (!state) {
+		WriteLog("using simulation seed: " + std::to_string(Global.random_seed), logtype::generic);

-    if( true == simulation::State.deserialize( Global.SceneryFile ) ) {
-        WriteLog( "Scenario loading time: " + std::to_string( std::chrono::duration_cast<std::chrono::seconds>( ( std::chrono::system_clock::now() - timestart ) ).count() ) + " seconds" );
-        // TODO: implement and use next mode cue
-        Application.pop_mode();
-        Application.push_mode( eu07_application::mode::driver );
-    }
-    else {
-        ErrorLog( "Bad init: scenario loading failed" );
-        Application.pop_mode();
-    }
+		WriteLog( "\nLoading scenario \"" + Global.SceneryFile + "\"..." );
+
+		timestart = std::chrono::system_clock::now();
+		state = simulation::State.deserialize_begin(Global.SceneryFile);
+	}
+
+	try {
+		if (simulation::State.deserialize_continue(state))
+			return true;
+	}
+	catch (invalid_scenery_exception &e) {
+		ErrorLog( "Bad init: scenario loading failed" );
+		Application.pop_mode();
+	}
+
+	WriteLog( "Scenario loading time: " + std::to_string( std::chrono::duration_cast<std::chrono::seconds>( ( std::chrono::system_clock::now() - timestart ) ).count() ) + " seconds" );
+	// TODO: implement and use next mode cue
+
+	Application.pop_mode();
+    Application.push_mode( eu07_application::mode::driver );

    return true;
 }
@@ -75,6 +88,6 @@ scenarioloader_mode::enter() {
 void
 scenarioloader_mode::exit() {

-    simulation::Time.init();
+    simulation::Time.init( Global.starting_timestamp );
    simulation::Environment.init();
 }
--- a/scenarioloadermode.h
+++ b/scenarioloadermode.h
@@ -10,8 +10,11 @@ http://mozilla.org/MPL/2.0/.
 #pragma once

 #include "applicationmode.h"
+#include "simulation.h"

 class scenarioloader_mode : public application_mode {
+	std::shared_ptr<simulation::deserializer_state> state;
+	std::chrono::system_clock::time_point timestart;

 public:
 // constructors
@@ -32,6 +35,8 @@ public:
    // input handlers
    void
        on_key( int const Key, int const Scancode, int const Action, int const Mods ) override { ; }
+    void
+        on_char( unsigned int const Char ) override { ; }
    void
        on_cursor_pos( double const Horizontal, double const Vertical ) override { ; }
    void
@@ -40,4 +45,6 @@ public:
        on_scroll( double const Xoffset, double const Yoffset ) override { ; }
    void
        on_event_poll() override { ; }
+    bool
+        is_command_processor() override { return false; }
 };
--- a/scene.cpp
+++ b/scene.cpp
@@ -35,7 +35,7 @@ basic_cell::on_click( TAnimModel const *Instance ) {
        if( ( launcher->name() == Instance->name() )
         && ( glm::length2( launcher->location() - Instance->location() ) < launcher->dRadius )
         && ( true == launcher->check_conditions() ) ) {
-            launch_event( launcher );
+            launch_event( launcher, true );
        }
    }
 }
@@ -123,11 +123,13 @@ basic_cell::update_events() {

    // event launchers
    for( auto *launcher : m_eventlaunchers ) {
-        if( ( true == ( launcher->check_activation() && launcher->check_conditions() ) )
-         && ( ( launcher->dRadius < 0.0 )
-           || ( SquareMagnitude( launcher->location() - Global.pCamera.Pos ) < launcher->dRadius ) ) ) {
-
-            launch_event( launcher );
+        if( launcher->check_conditions()
+            && ( launcher->dRadius < 0.0
+                || SquareMagnitude( launcher->location() - Global.pCamera.Pos ) < launcher->dRadius ) ) {
+            if( launcher->check_activation() )
+                launch_event( launcher, true );
+            if( launcher->check_activation_key() )
+                launch_event( launcher, true );
        }
    }
 }
@@ -608,16 +610,19 @@ basic_cell::create_geometry( gfx::geometrybank_handle const &Bank ) {

 // executes event assigned to specified launcher
 void
-basic_cell::launch_event( TEventLauncher *Launcher ) {
-
-    WriteLog( "Eventlauncher " + Launcher->name() );
-    if( ( true == Global.shiftState )
-     && ( Launcher->Event2 != nullptr ) ) {
-        simulation::Events.AddToQuery( Launcher->Event2, nullptr );
-    }
-    else if( Launcher->Event1 ) {
-        simulation::Events.AddToQuery( Launcher->Event1, nullptr );
-    }
+basic_cell::launch_event( TEventLauncher *Launcher, bool local_only ) {
+	WriteLog( "Eventlauncher: " + Launcher->name() );
+	if (!local_only) {
+		if( Launcher->Event1 ) {
+			simulation::Events.AddToQuery( Launcher->Event1, nullptr );
+		}
+	} else {
+        command_relay commandrelay;
+        if (Global.shiftState && Launcher->Event2 != nullptr)
+			commandrelay.post(user_command::queueevent, 0.0, 0.0, GLFW_PRESS, 0, glm::vec3(0.0f), &Launcher->Event2->name());
+		else if (Launcher->Event1)
+			commandrelay.post(user_command::queueevent, 0.0, 0.0, GLFW_PRESS, 0, glm::vec3(0.0f), &Launcher->Event1->name());
+	}
 }

 // adjusts cell bounding area to enclose specified node
--- a/scene.h
+++ b/scene.h
@@ -173,7 +173,7 @@ private:
    using memorycell_sequence = std::vector<TMemCell *>;
 // methods
    void
-        launch_event( TEventLauncher *Launcher );
+	    launch_event(TEventLauncher *Launcher, bool local_only);
    void
        enclose_area( scene::basic_node *Node );
 // members
--- a/scenenode.h
+++ b/scenenode.h
@@ -342,6 +342,10 @@ public:
        group( scene::group_handle Group );
    scene::group_handle
        group() const;
+	void
+	    mark_dirty() { m_dirty = true; }
+	bool
+	    dirty() const { return m_dirty; }

 protected:
 // members
@@ -351,6 +355,7 @@ protected:
    double m_rangesquaredmax { 0.0 }; // visibility range, max
    bool m_visible { true }; // visibility flag
    std::string m_name;
+	bool m_dirty { false };

 private:
 // methods
--- a/simulation.cpp
+++ b/simulation.cpp
@@ -25,6 +25,7 @@ http://mozilla.org/MPL/2.0/.
 #include "particles.h"
 #include "scene.h"
 #include "Train.h"
+#include "application.h"

 namespace simulation {

@@ -37,18 +38,26 @@ powergridsource_table Powergrid;
 sound_table Sounds;
 instance_table Instances;
 vehicle_table Vehicles;
+train_table Trains;
 light_array Lights;
 particle_manager Particles;

 scene::basic_region *Region { nullptr };
 TTrain *Train { nullptr };

+uint16_t prev_train_id { 0 };
 bool is_ready { false };

-bool
-state_manager::deserialize( std::string const &Scenariofile ) {
+std::shared_ptr<deserializer_state>
+state_manager::deserialize_begin(std::string const &Scenariofile) {

-    return m_serializer.deserialize( Scenariofile );
+	return m_serializer.deserialize_begin( Scenariofile );
+}
+
+bool
+state_manager::deserialize_continue(std::shared_ptr<deserializer_state> state) {
+
+	return m_serializer.deserialize_continue(state);
 }

 // stores class data in specified file, in legacy (text) format
@@ -92,9 +101,7 @@ state_manager::init_scripting_interface() {
 void
 state_manager::update( double const Deltatime, int Iterationcount ) {
    // aktualizacja animacji krokiem FPS: dt=krok czasu [s], dt*iter=czas od ostatnich przeliczeń
-    if (Deltatime == 0.0) {
-        return;
-    }
+    if (Deltatime == 0.0) { return; }

    auto const totaltime { Deltatime * Iterationcount };
    // NOTE: we perform animations first, as they can determine factors like contact with powergrid
@@ -166,6 +173,261 @@ state_manager::update_scripting_interface() {
    *m_scriptinginterface.date = *date;
 }

+void state_manager::process_commands() {
+	command_data commanddata;
+	while( Commands.pop( commanddata, (uint32_t)command_target::simulation )) {
+		if (commanddata.command == user_command::consistreleaser) {
+			TDynamicObject *found_vehicle = simulation::Vehicles.find(commanddata.payload);
+			TDynamicObject *vehicle = found_vehicle;
+
+			while (vehicle) {
+				vehicle->MoverParameters->Hamulec->Releaser(commanddata.action != GLFW_RELEASE ? 1 : 0);
+				vehicle = vehicle->Next();
+			}
+
+			vehicle = found_vehicle;
+			while (vehicle) {
+				vehicle->MoverParameters->Hamulec->Releaser(commanddata.action != GLFW_RELEASE ? 1 : 0);
+				vehicle = vehicle->Prev();
+			}
+		}
+
+		if (commanddata.action == GLFW_RELEASE)
+			continue;
+
+		if (commanddata.command == user_command::debugtoggle)
+			DebugModeFlag = !DebugModeFlag;
+
+		if (commanddata.command == user_command::pausetoggle) {
+			if( Global.iPause & 1 ) {
+				// jeśli pauza startowa
+				// odpauzowanie, gdy po wczytaniu miało nie startować
+				Global.iPause ^= 1;
+			}
+			else {
+				Global.iPause ^= 2; // zmiana stanu zapauzowania
+			}
+		}
+
+		if (commanddata.command == user_command::focuspauseset) {
+			if( commanddata.param1 == 1.0 )
+				Global.iPause &= ~4; // odpauzowanie, gdy jest na pierwszym planie
+			else
+				Global.iPause |= 4; // włączenie pauzy, gdy nieaktywy
+		}
+
+		if (commanddata.command == user_command::entervehicle) {
+			// przesiadka do innego pojazdu
+			if (!commanddata.freefly)
+				// only available in free fly mode
+				continue;
+
+			TDynamicObject *dynamic = std::get<TDynamicObject *>( simulation::Region->find_vehicle( commanddata.location, 50, false, false ) );
+
+			if (!dynamic)
+				continue;
+
+			TTrain *train = simulation::Trains.find(dynamic->name());
+			if (train)
+				continue;
+
+			train = new TTrain();
+			if (train->Init(dynamic)) {
+				simulation::Trains.insert(train);
+			}
+			else {
+				delete train;
+				train = nullptr;
+			}
+		}
+
+		if (commanddata.command == user_command::queueevent) {
+			std::istringstream ss(commanddata.payload);
+
+			std::string event_name;
+			std::string vehicle_name;
+			std::getline(ss, event_name, '%');
+			std::getline(ss, vehicle_name, '%');
+
+			basic_event *ev = Events.FindEvent(event_name);
+			TDynamicObject *vehicle = nullptr;
+			if (!vehicle_name.empty())
+				vehicle = simulation::Vehicles.find(vehicle_name);
+
+			if (ev)
+				Events.AddToQuery(ev, vehicle);
+		}
+
+		if (commanddata.command == user_command::setlight) {
+			int light = std::round(commanddata.param1);
+			float state = commanddata.param2;
+			TAnimModel *model = simulation::Instances.find(commanddata.payload);
+			if (model)
+				model->LightSet(light, state);
+		}
+
+		if (commanddata.command == user_command::setdatetime) {
+			int yearday = std::round(commanddata.param1);
+			int minute = std::round(commanddata.param2 * 60.0);
+			simulation::Time.set_time(yearday, minute);
+
+			simulation::Environment.compute_season(yearday);
+		}
+
+		if (commanddata.command == user_command::setweather) {
+			Global.fFogEnd = commanddata.param1;
+			Global.Overcast = commanddata.param2;
+
+			simulation::Environment.compute_weather();
+		}
+
+		if (commanddata.command == user_command::settemperature) {
+			Global.AirTemperature = commanddata.param1;
+		}
+
+		if (commanddata.command == user_command::insertmodel) {
+			std::istringstream ss(commanddata.payload);
+
+			std::string name;
+			std::string data;
+			std::getline(ss, name, ':');
+			std::getline(ss, data, ':');
+
+			TAnimModel *model = simulation::State.create_model(data, name, commanddata.location);
+			simulation::State.create_eventlauncher("node -1 0 launcher eventlauncher 0 0 0 " + std::to_string(model->radius())
+			                                       + " none -10000.0 obstacle_collision end", name + "_snd", commanddata.location);
+		}
+
+		if (commanddata.command == user_command::deletemodel) {
+			simulation::State.delete_model(simulation::Instances.find(commanddata.payload));
+			simulation::State.delete_eventlauncher(simulation::Events.FindEventlauncher(commanddata.payload + "_snd"));
+		}
+
+		if (commanddata.command == user_command::globalradiostop) {
+			simulation::Region->RadioStop( commanddata.location );
+		}
+
+		if (commanddata.command == user_command::resetconsist) {
+			TDynamicObject *found_vehicle = simulation::Vehicles.find(commanddata.payload);
+			TDynamicObject *vehicle = found_vehicle;
+
+			while (vehicle) {
+				if (vehicle->Next())
+					vehicle = vehicle->Next();
+				else
+					break;
+			}
+
+			while (vehicle) {
+				vehicle->MoverParameters->DamageFlag = 0;
+				vehicle->MoverParameters->EngDmgFlag = 0;
+				vehicle->MoverParameters->V = 0.0;
+				vehicle->MoverParameters->DistCounter = 0.0;
+				vehicle->MoverParameters->WheelFlat = 0.0;
+				vehicle->MoverParameters->AlarmChainFlag = false;
+				vehicle->MoverParameters->OffsetTrackH = 0.0;
+				vehicle->MoverParameters->OffsetTrackV = 0.0;
+				vehicle = vehicle->Prev();
+			}
+		}
+
+		if (commanddata.command == user_command::fillcompressor) {
+			TDynamicObject *vehicle = simulation::Vehicles.find(commanddata.payload);
+			vehicle->MoverParameters->CompressedVolume = 8.0f * vehicle->MoverParameters->VeselVolume;
+		}
+
+		if (commanddata.command == user_command::dynamicmove) {
+			TDynamicObject *vehicle = simulation::Vehicles.find(commanddata.payload);
+			if (vehicle)
+				vehicle->move_set(commanddata.param1);
+		}
+
+		if (commanddata.command == user_command::consistteleport) {
+			std::istringstream ss(commanddata.payload);
+
+			std::string track_name;
+			std::string vehicle_name;
+			std::getline(ss, vehicle_name, '%');
+			std::getline(ss, track_name, '%');
+
+			TTrack *track = simulation::Paths.find(track_name);
+			TDynamicObject *vehicle = simulation::Vehicles.find(vehicle_name);
+
+			while (vehicle) {
+				if (vehicle->Next())
+					vehicle = vehicle->Next();
+				else
+					break;
+			}
+
+			double offset = 0.0;
+
+			while (vehicle) {
+				offset += vehicle->MoverParameters->Dim.L;
+				vehicle->place_on_track(track, offset, false);
+				vehicle = vehicle->Prev();
+			}
+		}
+
+		if (commanddata.command == user_command::spawntrainset) {
+
+		}
+
+		if (commanddata.command == user_command::pullalarmchain) {
+			TDynamicObject *vehicle = simulation::Vehicles.find(commanddata.payload);
+			if (vehicle)
+				vehicle->MoverParameters->AlarmChainSwitch(true);
+		}
+
+		if (commanddata.command == user_command::sendaicommand) {
+			std::istringstream ss(commanddata.payload);
+
+			std::string vehicle_name;
+			std::string command;
+			std::getline(ss, vehicle_name, '%');
+			std::getline(ss, command, '%');
+
+			TDynamicObject *vehicle = simulation::Vehicles.find(vehicle_name);
+			glm::dvec3 location = commanddata.location;
+			if (vehicle && vehicle->Mechanik)
+				vehicle->Mechanik->PutCommand(command, commanddata.param1, commanddata.param2, &location);
+		}
+
+		if (commanddata.command == user_command::quitsimulation) {
+			Application.queue_quit();
+		}
+
+		if (DebugModeFlag) {
+			if (commanddata.command == user_command::timejump) {
+				Time.update(commanddata.param1);
+			}
+			else if (commanddata.command == user_command::timejumplarge) {
+				Time.update(20.0 * 60.0);
+			}
+			else if (commanddata.command == user_command::timejumpsmall) {
+				Time.update(5.0 * 60.0);
+			}
+		}
+	}
+}
+
+TAnimModel * state_manager::create_model(const std::string &src, const std::string &name, const glm::dvec3 &position) {
+	return m_serializer.create_model(src, name, position);
+}
+
+TEventLauncher * state_manager::create_eventlauncher(const std::string &src, const std::string &name, const glm::dvec3 &position) {
+	return m_serializer.create_eventlauncher(src, name, position);
+}
+
+void state_manager::delete_model(TAnimModel *model) {
+	Region->erase(model);
+	Instances.purge(model);
+}
+
+void state_manager::delete_eventlauncher(TEventLauncher *launcher) {
+	launcher->dRadius = 0.0f; // disable it
+}
+
 // passes specified sound to all vehicles within range as a radio message broadcasted on specified channel
 void
 radio_message( sound_source *Message, int const Channel ) {
--- a/simulation.h
+++ b/simulation.h
@@ -27,9 +27,27 @@ public:
        update_clocks();
    void
        update_scripting_interface();
-    // restores simulation data from specified file. returns: true on success, false otherwise
-    bool
-        deserialize( std::string const &Scenariofile );
+    // process input commands
+    void
+        process_commands();
+ 	// create model from node string
+	TAnimModel *
+	    create_model(const std::string &src, const std::string &name, const glm::dvec3 &position);
+	// create eventlauncher from node string
+	TEventLauncher *
+	    create_eventlauncher(const std::string &src, const std::string &name, const glm::dvec3 &position);
+	// delete TAnimModel instance
+	void
+	    delete_model(TAnimModel *model);
+	// delete TEventLauncher instance
+	void
+	    delete_eventlauncher(TEventLauncher *launcher);
+	// starts deserialization from specified file, returns context pointer on success, throws otherwise
+	std::shared_ptr<deserializer_state>
+	    deserialize_begin(std::string const &Scenariofile);
+	// continues deserialization for given context, amount limited by time, returns true if needs to be called again
+	bool
+	    deserialize_continue(std::shared_ptr<deserializer_state> state);
    // stores class data in specified file, in legacy (text) format
    void
        export_as_text( std::string const &Scenariofile ) const;
@@ -54,14 +72,18 @@ extern powergridsource_table Powergrid;
 extern sound_table Sounds;
 extern instance_table Instances;
 extern vehicle_table Vehicles;
+extern train_table Trains;
 extern light_array Lights;
 extern particle_manager Particles;

 extern scene::basic_region *Region;
 extern TTrain *Train;

+extern uint16_t prev_train_id;
 extern bool is_ready;

+struct deserializer_state;
+
 } // simulation

 //---------------------------------------------------------------------------
--- a/simulationstateserializer.cpp
+++ b/simulationstateserializer.cpp
@@ -31,8 +31,8 @@ http://mozilla.org/MPL/2.0/.

 namespace simulation {

-bool
-state_serializer::deserialize( std::string const &Scenariofile ) {
+std::shared_ptr<deserializer_state>
+state_serializer::deserialize_begin( std::string const &Scenariofile ) {

    // TODO: move initialization to separate routine so we can reuse it
    SafeDelete( Region );
@@ -40,93 +40,81 @@ state_serializer::deserialize( std::string const &Scenariofile ) {

    simulation::State.init_scripting_interface();

+	// NOTE: for the time being import from text format is a given, since we don't have full binary serialization
+	std::shared_ptr<deserializer_state> state =
+	        std::make_shared<deserializer_state>(Scenariofile, cParser::buffer_FILE, Global.asCurrentSceneryPath, Global.bLoadTraction);
+
    // TODO: check first for presence of serialized binary files
    // if this fails, fall back on the legacy text format
-    scene::scratch_data importscratchpad;
-    importscratchpad.name = Scenariofile;
-    if( ( true == Global.file_binary_terrain )
-     && ( Scenariofile != "$.scn" ) ) {
+	state->scratchpad.name = Scenariofile;
+    if( Scenariofile != "$.scn" ) {
        // compilation to binary file isn't supported for rainsted-created overrides
        // NOTE: we postpone actual loading of the scene until we process time, season and weather data
-        importscratchpad.binary.terrain = Region->is_scene( Scenariofile ) ;
-    }
-    // NOTE: for the time being import from text format is a given, since we don't have full binary serialization
-    cParser scenarioparser( Scenariofile, cParser::buffer_FILE, Global.asCurrentSceneryPath, Global.bLoadTraction );
-
-    if( false == scenarioparser.ok() ) { return false; }
-
-    deserialize( scenarioparser, importscratchpad );
-    if( ( true == Global.file_binary_terrain )
-     && ( false == importscratchpad.binary.terrain )
-     && ( Scenariofile != "$.scn" ) ) {
-        // if we didn't find usable binary version of the scenario files, create them now for future use
-        // as long as the scenario file wasn't rainsted-created base file override
-        Region->serialize( Scenariofile );
+		state->scratchpad.binary.terrain = Region->is_scene( Scenariofile ) ;
    }

-    return true;
+	if( false == state->input.ok() )
+		throw invalid_scenery_exception();
+
+	// prepare deserialization function table
+	// since all methods use the same objects, we can have simple, hard-coded binds or lambdas for the task
+	using deserializefunction = void( state_serializer::*)(cParser &, scene::scratch_data &);
+	std::vector<
+	    std::pair<
+	        std::string,
+	        deserializefunction> > functionlist = {
+	            { "area",        &state_serializer::deserialize_area },
+	            { "assignment",  &state_serializer::deserialize_assignment },
+	            { "atmo",        &state_serializer::deserialize_atmo },
+	            { "camera",      &state_serializer::deserialize_camera },
+	            { "config",      &state_serializer::deserialize_config },
+	            { "description", &state_serializer::deserialize_description },
+	            { "event",       &state_serializer::deserialize_event },
+//	            { "lua",         &state_serializer::deserialize_lua },
+	            { "firstinit",   &state_serializer::deserialize_firstinit },
+	            { "group",       &state_serializer::deserialize_group },
+	            { "endgroup",    &state_serializer::deserialize_endgroup },
+	            { "light",       &state_serializer::deserialize_light },
+	            { "node",        &state_serializer::deserialize_node },
+	            { "origin",      &state_serializer::deserialize_origin },
+	            { "endorigin",   &state_serializer::deserialize_endorigin },
+	            { "rotate",      &state_serializer::deserialize_rotate },
+	            { "sky",         &state_serializer::deserialize_sky },
+	            { "test",        &state_serializer::deserialize_test },
+	            { "time",        &state_serializer::deserialize_time },
+	            { "trainset",    &state_serializer::deserialize_trainset },
+	            { "endtrainset", &state_serializer::deserialize_endtrainset } };
+
+	for( auto &function : functionlist ) {
+		state->functionmap.emplace( function.first, std::bind( function.second, this, std::ref( state->input ), std::ref( state->scratchpad ) ) );
+	}
+
+	return state;
 }

-// restores class data from provided stream
-void
-state_serializer::deserialize( cParser &Input, scene::scratch_data &Scratchpad ) {
-
-    // prepare deserialization function table
-    // since all methods use the same objects, we can have simple, hard-coded binds or lambdas for the task
-    using deserializefunction = void( state_serializer::*)(cParser &, scene::scratch_data &);
-    std::vector<
-        std::pair<
-            std::string,
-            deserializefunction> > functionlist = {
-                { "area",        &state_serializer::deserialize_area },
-                { "assignment",  &state_serializer::deserialize_assignment },
-                { "atmo",        &state_serializer::deserialize_atmo },
-                { "camera",      &state_serializer::deserialize_camera },
-                { "config",      &state_serializer::deserialize_config },
-                { "description", &state_serializer::deserialize_description },
-                { "event",       &state_serializer::deserialize_event },
-                { "firstinit",   &state_serializer::deserialize_firstinit },
-                { "group",       &state_serializer::deserialize_group },
-                { "endgroup",    &state_serializer::deserialize_endgroup },
-                { "light",       &state_serializer::deserialize_light },
-                { "node",        &state_serializer::deserialize_node },
-                { "origin",      &state_serializer::deserialize_origin },
-                { "endorigin",   &state_serializer::deserialize_endorigin },
-                { "rotate",      &state_serializer::deserialize_rotate },
-                { "sky",         &state_serializer::deserialize_sky },
-                { "test",        &state_serializer::deserialize_test },
-                { "time",        &state_serializer::deserialize_time },
-                { "trainset",    &state_serializer::deserialize_trainset },
-                { "endtrainset", &state_serializer::deserialize_endtrainset } };
-    using deserializefunctionbind = std::function<void()>;
-    std::unordered_map<
-        std::string,
-        deserializefunctionbind> functionmap;
-    for( auto &function : functionlist ) {
-        functionmap.emplace( function.first, std::bind( function.second, this, std::ref( Input ), std::ref( Scratchpad ) ) );
-    }
+// continues deserialization for given context, amount limited by time, returns true if needs to be called again
+bool
+state_serializer::deserialize_continue(std::shared_ptr<deserializer_state> state) {
+	cParser &Input = state->input;
+	scene::scratch_data &Scratchpad = state->scratchpad;

    // deserialize content from the provided input
-    auto
-        timelast { std::chrono::steady_clock::now() },
-        timenow { timelast };
+	auto timelast { std::chrono::steady_clock::now() };
    std::string token { Input.getToken<std::string>() };
    while( false == token.empty() ) {

-        auto lookup = functionmap.find( token );
-        if( lookup != functionmap.end() ) {
+		auto lookup = state->functionmap.find( token );
+		if( lookup != state->functionmap.end() ) {
            lookup->second();
        }
        else {
            ErrorLog( "Bad scenario: unexpected token \"" + token + "\" defined in file \"" + Input.Name() + "\" (line " + std::to_string( Input.Line() - 1 ) + ")" );
        }

-        timenow = std::chrono::steady_clock::now();
-        if( std::chrono::duration_cast<std::chrono::milliseconds>( timenow - timelast ).count() >= 100 ) {
-            timelast = timenow;
-            glfwPollEvents();
+		auto timenow = std::chrono::steady_clock::now();
+        if( std::chrono::duration_cast<std::chrono::milliseconds>( timenow - timelast ).count() >= 200 ) {
            Application.set_progress( Input.getProgress(), Input.getFullProgress() );
-            GfxRenderer->Render();
+			return true;
        }

        token = Input.getToken<std::string>();
@@ -136,6 +124,18 @@ state_serializer::deserialize( cParser &Input, scene::scratch_data &Scratchpad )
        // manually perform scenario initialization
        deserialize_firstinit( Input, Scratchpad );
    }
+/*
+	scene::Groups.update_map();
+	Region->create_map_geometry();
+*/
+	if( ( false == state->scratchpad.binary.terrain )
+	 && ( state->scenariofile != "$.scn" ) ) {
+		// if we didn't find usable binary version of the scenario files, create them now for future use
+		// as long as the scenario file wasn't rainsted-created base file override
+		Region->serialize( state->scenariofile );
+	}
+
+	return false;
 }

 void
@@ -1072,6 +1072,60 @@ state_serializer::export_as_text( std::string const &Scenariofile ) const {
    WriteLog( "Scenery data export done." );
 }

+TAnimModel *state_serializer::create_model(const std::string &src, const std::string &name, const glm::dvec3 &position) {
+	cParser parser(src);
+	parser.getTokens(); // "node"
+	parser.getTokens(2); // ranges
+
+	scene::node_data nodedata;
+	parser >> nodedata.range_max >> nodedata.range_min;
+
+	parser.getTokens(2); // name, type
+	nodedata.name = name;
+	nodedata.type = "model";
+
+	scene::scratch_data scratch;
+
+	TAnimModel *cloned = deserialize_model(parser, scratch, nodedata);
+
+	if (!cloned)
+		return nullptr;
+
+	cloned->mark_dirty();
+	cloned->location(position);
+	simulation::Instances.insert(cloned);
+	simulation::Region->insert(cloned);
+
+	return cloned;
+}
+
+TEventLauncher *state_serializer::create_eventlauncher(const std::string &src, const std::string &name, const glm::dvec3 &position) {
+	cParser parser(src);
+	parser.getTokens(); // "node"
+	parser.getTokens(2); // ranges
+
+	scene::node_data nodedata;
+	parser >> nodedata.range_max >> nodedata.range_min;
+
+	parser.getTokens(2); // name, type
+	nodedata.name = name;
+	nodedata.type = "eventlauncher";
+
+	scene::scratch_data scratch;
+
+	TEventLauncher *launcher = deserialize_eventlauncher(parser, scratch, nodedata);
+
+	if (!launcher)
+		return nullptr;
+
+	launcher->Event1 = simulation::Events.FindEvent( launcher->asEvent1Name );
+	launcher->location(position);
+	simulation::Events.insert(launcher);
+	simulation::Region->insert(launcher);
+
+	return launcher;
+}
+
 } // simulation

  //---------------------------------------------------------------------------
--- a/simulationstateserializer.h
+++ b/simulationstateserializer.h
@@ -14,21 +14,40 @@ http://mozilla.org/MPL/2.0/.

 namespace simulation {

+struct deserializer_state {
+	std::string scenariofile;
+	cParser input;
+	scene::scratch_data scratchpad;
+	using deserializefunctionbind = std::function<void()>;
+	std::unordered_map<
+	    std::string,
+	    deserializefunctionbind> functionmap;
+
+	deserializer_state(std::string const &File, cParser::buffertype const Type, const std::string &Path, bool const Loadtraction)
+	    : scenariofile(File), input(File, Type, Path, Loadtraction) { }
+};
+
 class state_serializer {

 public:
 // methods
-    // restores simulation data from specified file. returns: true on success, false otherwise
-    bool
-        deserialize( std::string const &Scenariofile );
+	// starts deserialization from specified file, returns context pointer on success, throws otherwise
+	std::shared_ptr<deserializer_state>
+	    deserialize_begin(std::string const &Scenariofile);
+	// continues deserialization for given context, amount limited by time, returns true if needs to be called again
+	bool
+	    deserialize_continue(std::shared_ptr<deserializer_state> state);
    // stores class data in specified file, in legacy (text) format
    void
        export_as_text( std::string const &Scenariofile ) const;
+	// create new model from node stirng
+	TAnimModel * create_model(std::string const &src, std::string const &name, const glm::dvec3 &position);
+	// create new eventlauncher from node stirng
+	TEventLauncher * create_eventlauncher(std::string const &src, std::string const &name, const glm::dvec3 &position);

 private:
 // methods
    // restores class data from provided stream
-    void deserialize( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_area( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_assignment( cParser &Input, scene::scratch_data &Scratchpad );
    void deserialize_atmo( cParser &Input, scene::scratch_data &Scratchpad );
--- a/simulationtime.cpp
+++ b/simulationtime.cpp
@@ -20,7 +20,7 @@ scenario_time Time;
 } // simulation

 void
-scenario_time::init() {
+scenario_time::init(std::time_t timestamp) {

    char monthdaycounts[ 2 ][ 13 ] = {
        { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
@@ -32,7 +32,21 @@ scenario_time::init() {
    auto const requestedhour { ( requestedtime / 60 ) % 24 };
    auto const requestedminute { requestedtime % 60 };
    // cache requested elements, if any
-    ::GetLocalTime( &m_time );
+
+    if( timestamp != 0 ) {
+        std::tm *tms = std::gmtime( &timestamp );
+        m_time.wYear = tms->tm_year + 1900;
+        m_time.wMonth = tms->tm_mon + 1;
+        m_time.wDayOfWeek = tms->tm_wday;
+        m_time.wDay = tms->tm_mday;
+        m_time.wHour = tms->tm_hour;
+        m_time.wMinute = tms->tm_min;
+        m_time.wSecond = tms->tm_sec;
+        m_time.wMilliseconds = 0;
+    }
+    else {
+        ::GetLocalTime( &m_time );
+    }

    if( Global.fMoveLight > 0.f ) {
        // day and month of the year can be overriden by scenario setup
@@ -192,6 +206,13 @@ scenario_time::julian_day() const {
    return JD;
 }

+void scenario_time::set_time(int yearday, int minute) {
+	m_yearday = yearday;
+	daymonth(m_time.wDay, m_time.wMonth, m_time.wYear, m_yearday);
+	m_time.wHour = minute / 60;
+	m_time.wMinute = minute % 60;
+}
+
 // calculates day of week for provided date
 int
 scenario_time::day_of_week( int const Day, int const Month, int const Year ) const {
--- a/simulationtime.h
+++ b/simulationtime.h
@@ -16,7 +16,7 @@ public:
    scenario_time() {
        m_time.wHour = 10; m_time.wMinute = 30; }
    void
-        init();
+	    init(time_t timestamp = 0);
    void
        update( double const Deltatime );
    inline
@@ -41,6 +41,8 @@ public:
    double
        zone_bias() const {
            return m_timezonebias; }
+	void
+	    set_time(int yearday, int minute);

 private:
    // converts provided time transition date to regular date
--- a/sn_utils.cpp
+++ b/sn_utils.cpp
@@ -38,6 +38,18 @@ int32_t sn_utils::ld_int32(std::istream &s)
 	return reinterpret_cast<int32_t&>(v);
 }

+// deserialize little endian int64
+int64_t sn_utils::ld_int64(std::istream &s)
+{
+	uint8_t buf[8];
+	s.read((char*)buf, 8);
+	uint64_t v = ((uint64_t)buf[7] << 56) | ((uint64_t)buf[6] << 48) |
+	             ((uint64_t)buf[5] << 40) | ((uint64_t)buf[4] << 32) |
+	             ((uint64_t)buf[3] << 24) | ((uint64_t)buf[2] << 16) |
+	             ((uint64_t)buf[1] << 8) | (uint64_t)buf[0];
+	return reinterpret_cast<int64_t&>(v);
+}
+
 // deserialize little endian ieee754 float32
 float sn_utils::ld_float32(std::istream &s)
 {
@@ -88,6 +100,14 @@ glm::dvec3 sn_utils::d_dvec3(std::istream& s)
        ld_float64(s) };
 }

+glm::vec3 sn_utils::d_vec3( std::istream& s)
+{
+	return {
+		ld_float32(s),
+		ld_float32(s),
+		ld_float32(s) };
+}
+
 glm::vec4 sn_utils::d_vec4( std::istream& s)
 {
    return {
@@ -125,6 +145,20 @@ void sn_utils::ls_int32(std::ostream &s, int32_t v)
 	s.write((char*)buf, 4);
 }

+void sn_utils::ls_int64(std::ostream &s, int64_t v)
+{
+	uint8_t buf[8];
+	buf[0] = v;
+	buf[1] = v >> 8;
+	buf[2] = v >> 16;
+	buf[3] = v >> 24;
+	buf[4] = v >> 32;
+	buf[5] = v >> 40;
+	buf[6] = v >> 48;
+	buf[7] = v >> 56;
+	s.write((char*)buf, 8);
+}
+
 void sn_utils::ls_float32(std::ostream &s, float t)
 {
 	uint32_t v = reinterpret_cast<uint32_t&>(t);
@@ -173,6 +207,13 @@ void sn_utils::s_dvec3(std::ostream &s, glm::dvec3 const &v)
    ls_float64(s, v.z);
 }

+void sn_utils::s_vec3(std::ostream &s, glm::vec3 const &v)
+{
+	ls_float32(s, v.x);
+	ls_float32(s, v.y);
+	ls_float32(s, v.z);
+}
+
 void sn_utils::s_vec4(std::ostream &s, glm::vec4 const &v)
 {
    ls_float32(s, v.x);
--- a/sn_utils.h
+++ b/sn_utils.h
@@ -10,20 +10,24 @@ public:
 	static uint16_t ld_uint16(std::istream&);
 	static uint32_t ld_uint32(std::istream&);
 	static int32_t ld_int32(std::istream&);
+	static int64_t ld_int64(std::istream&);
 	static float ld_float32(std::istream&);
 	static double ld_float64(std::istream&);
 	static std::string d_str(std::istream&);
    static bool d_bool(std::istream&);
    static glm::dvec3 d_dvec3(std::istream&);
+	static glm::vec3 d_vec3(std::istream&);
    static glm::vec4 d_vec4(std::istream&);

 	static void ls_uint16(std::ostream&, uint16_t);
 	static void ls_uint32(std::ostream&, uint32_t);
 	static void ls_int32(std::ostream&, int32_t);
+	static void ls_int64(std::ostream&, int64_t);
 	static void ls_float32(std::ostream&, float);
 	static void ls_float64(std::ostream&, double);
 	static void s_str(std::ostream&, std::string);
    static void s_bool(std::ostream&, bool);
    static void s_dvec3(std::ostream&, glm::dvec3 const &);
+	static void s_vec3(std::ostream&, glm::vec3 const &);
    static void s_vec4(std::ostream&, glm::vec4 const &);
 };
--- a/sound.cpp
+++ b/sound.cpp
@@ -194,7 +194,7 @@ sound_source::deserialize_mapping( cParser &Input ) {
        m_pitchvariation = (
            variation == 0.0f ?
                1.0f :
-                0.01f * static_cast<float>( Random( 100.0 - variation, 100.0 + variation ) ) );
+                0.01f * static_cast<float>( LocalRandom( 100.0 - variation, 100.0 + variation ) ) );
    }
    else if( key == "startoffset:" ) {
        m_startoffset =
@@ -353,7 +353,7 @@ sound_source::play( int const Flags ) {

    // initialize emitter-specific pitch variation if it wasn't yet set
    if( m_pitchvariation == 0.f ) {
-        m_pitchvariation = 0.01f * static_cast<float>( Random( 97.5, 102.5 ) );
+        m_pitchvariation = 0.01f * static_cast<float>( LocalRandom( 97.5, 102.5 ) );
    }
 /*
    if( ( ( m_flags & sound_flags::exclusive ) != 0 )
--- a/utilities.cpp
+++ b/utilities.cpp
@@ -28,7 +28,7 @@ Copyright (C) 2007-2014 Maciej Cierniak
 #include "parser.h"

 bool DebugModeFlag = false;
-bool FreeFlyModeFlag = false;
+bool FreeFlyModeFlag = true;
 bool EditorModeFlag = false;
 bool DebugCameraFlag = false;
 bool DebugTractionFlag = false;
@@ -106,8 +106,8 @@ bool ClearFlag( int &Flag, int const Value ) {

 double Random(double a, double b)
 {
-    std::uniform_real_distribution<> dis(a, b);
-    return dis(Global.random_engine);
+	uint32_t val = Global.random_engine();
+	return interpolate(a, b, (double)val / Global.random_engine.max());
 }

 double LocalRandom(double a, double b)
--- a/utilities.h
+++ b/utilities.h
@@ -313,8 +313,8 @@ template <class Iterator_, class VecType_>
 void
 bounding_box( VecType_ &Mincorner, VecType_ &Maxcorner, Iterator_ First, Iterator_ Last ) {

-    Mincorner = VecType_( typename std::numeric_limits<VecType_::value_type>::max() );
-    Maxcorner = VecType_( typename std::numeric_limits<VecType_::value_type>::lowest() );
+    Mincorner = VecType_( std::numeric_limits<typename VecType_::value_type>::max() );
+    Maxcorner = VecType_( std::numeric_limits<typename VecType_::value_type>::lowest() );

    std::for_each(
        First, Last,