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Hi It would be really helpful to get this coverted to LUA to assist in development of Steamworks/Multiplayer. It's been tricky to use only the basic documentation to get it done, without an example. https://www.leadwerks.com/learn/Steamworks_GetPacket?lang=cpp Example This example demonstrates lobbies, voice chat, and simple player movement. #include "UltraEngine.h" #include "Steamworks/Steamworks.h" #include "ComponentSystem.h" using namespace UltraEngine; class Player : public Object { public: static inline std::map<uint64_t, shared_ptr<Player> > players; shared_ptr<Entity> entity; WString name; uint64_t userid; static std::shared_ptr<Player> Get(shared_ptr<World> world, const uint64_t userid) { if (players[userid]) return players[userid]; auto player = std::make_shared<Player>(); player->entity = CreatePivot(world); auto model = CreateCylinder(world, 0.25, 1.8); model->SetPosition(0, 0.9, 0); model->SetParent(player->entity); model->SetCollider(nullptr); player->userid = userid; players[userid] = player; return player; } static void Remove(const uint64_t userid) { players[userid] = nullptr; } }; struct PlayerState { Vec3 position; float yaw; }; int main(int argc, const char* argv[]) { // Initialize Steam if (not Steamworks::Initialize()) { RuntimeError("Steamworks failed to initialize."); return 1; } // Get the displays auto displays = GetDisplays(); // Create a window auto window = CreateWindow("Ultra Engine", 0, 0, 1280 * displays[0]->scale, 720 * displays[0]->scale, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR); // Create a framebuffer auto framebuffer = CreateFramebuffer(window); // Create world auto world = CreateWorld(); world->SetGravity(0, -18, 0); // Create lobby auto lobbyid = Steamworks::CreateLobby(Steamworks::LOBBY_PUBLIC); Print("Lobby: " + String(lobbyid)); // Spawn local player auto player = Player::Get(world, Steamworks::GetUserId()); player->entity->AddComponent<FirstPersonControls>(); // Add lighting auto light = CreateDirectionalLight(world); light->SetRotation(55, 35, 0); // Add a floor auto floor = CreateBox(world, 50, 1, 50); floor->SetPosition(0, -0.5, 0); auto mtl = CreateMaterial(); mtl->SetTexture(LoadTexture("https://github.com/UltraEngine/Documentation/raw/master/Assets/Materials/Developer/griid_gray.dds")); floor->SetMaterial(mtl); // Main loop while (not window->KeyDown(KEY_ESCAPE) and not window->Closed()) { while (PeekEvent()) { const auto e = WaitEvent(); switch (e.id) { case Steamworks::EVENT_LOBBYINVITEACCEPTED: case Steamworks::EVENT_LOBBYDATACHANGED: case Steamworks::EVENT_LOBBYUSERJOIN: case Steamworks::EVENT_LOBBYUSERLEAVE: case Steamworks::EVENT_LOBBYUSERDISCONNECT: auto info = e.source->As<Steamworks::LobbyEventInfo>(); auto username = Steamworks::GetUserName(info->userid); switch (e.id) { case Steamworks::EVENT_LOBBYINVITEACCEPTED: Print("Invite accepted to lobby " + String(info->lobbyid)); lobbyid = info->lobbyid; if (not Steamworks::JoinLobby(info->lobbyid)) { lobbyid = 0; Print("Failed to join lobby"); } break; case Steamworks::EVENT_LOBBYDATACHANGED: Print("New lobby owner " + username); break; case Steamworks::EVENT_LOBBYUSERJOIN: Print("User " + username + " joined"); if (not Player::players[info->userid]) { // Spawn remote player Player::Get(world, info->userid); } break; case Steamworks::EVENT_LOBBYUSERLEAVE: Print("User " + username + " left"); // Remove remote player Player::Remove(info->userid); break; case Steamworks::EVENT_LOBBYUSERDISCONNECT: Print("User " + username + " disconnected"); // Remove remote player Player::Remove(info->userid); break; } break; } } // Receive player data PlayerState state; while (true) { auto pak = Steamworks::GetPacket(); if (not pak) break; if (pak->data->GetSize() == sizeof(PlayerState)) { auto player = Player::Get(world, pak->userid); if (player) { pak->data->Peek(0, (const char*)&state, pak->data->GetSize()); player->entity->SetPosition(state.position); player->entity->SetRotation(state.yaw); } } } //Receive text messages while (true) { auto pak = Steamworks::GetPacket(1); if (not pak) break; String s = pak->data->PeekString(0); Print(Steamworks::GetUserName(pak->userid) + ": " + WString(s)); } // Send player data auto userid = Steamworks::GetUserId(); auto player = Player::players[userid]; state.position = player->entity->position; state.yaw = player->entity->rotation.y; Steamworks::BroadcastPacket(lobbyid, &state, sizeof(PlayerState), 0, Steamworks::P2PSEND_UNRELIABLENODELAY); // Enable voice chat when the C key is pressed bool record = window->KeyDown(KEY_C); Steamworks::RecordVoice(record); String title = "Ultra Engine"; if (record) title += " (Microphone Enabled)"; window->SetText(title); // Update world world->Update(); // Render world world->Render(framebuffer); // Update Steamworks Steamworks::Update(); } // Close Steam Steamworks::Shutdown(); return 0; }