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Prerequisites https://www.ultraengine.com/learn/luasetup?lang=lua Also Lua extension is quite useful for VS Code, if you don't mind Tencent. Map Create a simple map call start.ultra with a brush as floor and a Empty aka pivot with FPSPlayer component How to do it: Now you can press "F5" in the editor, or select "Game" then "run" to run your game to just made map: You can add skybox in Edit > World Settings (at top buttons in the Editor) by choosing skybox.dds from Materials\Environment\Default Main menu, loading screen and GUI Create a simple menu with couple brushes and camera and name this map menu.ultra Now open main.lua. For that open Project tab in top right corner, select root project folder and double click on Open the VSCode.bat file. If this fails make sure you have setup Visual Studio Code correctly https://www.ultraengine.com/learn/luasetup?lang=lua Select all i nfile and delete it from VS Code. Now paste there folllow code with just a Loading screen, almost without anything else and save: -- local before variable means it will be avaiable only in current scope (inside script, funtion, cycle or condition body) -- loading screen vars local loadingWorld = nil local loadingCamera = nil local loadingText = nil local loadingBackground = nil -- for using in main loop local currentWorld = nil local currentUi = nil local displays = GetDisplays() -- You can WINDOW_FULLSCREEN to styles to make game fullscreen, 3rd and 4th are resolution size window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[1], WINDOW_CENTER | WINDOW_TITLEBAR) -- Create a framebuffer, needed for rendering framebuffer = CreateFramebuffer(window) font = LoadFont("Fonts/arial.ttf"); loadingWorld = CreateWorld(); local centerX = framebuffer:GetSize().x * 0.5 local centerY = framebuffer:GetSize().y * 0.5 local labelHeight = framebuffer:GetSize().y * 0.2 loadingBackground = CreateSprite(loadingWorld, framebuffer.size.x, framebuffer.size.y) loadingBackground:SetColor(0.2, 0.2, 0.2); loadingBackground:SetRenderLayers(2); loadingText = CreateSprite(loadingWorld, font, "LOADING", labelHeight, TEXT_CENTER | TEXT_MIDDLE) loadingText:SetPosition(centerX, centerY + labelHeight * 0.5, 0) -- 0 layer - no render, 1 - default render, we will use 2 for UI and sprites loadingText:SetRenderLayers(2) -- Creating camera for sprites, which needs to be orthographic (2D) for UI and sprites if they used as UI loadingCamera = CreateCamera(loadingWorld, PROJECTION_ORTHOGRAPHIC); loadingCamera:SetPosition(centerX, centerY, 0); -- camera render layer should match with stuff that you want to be visible for this camera. RenderLayers is a bit mask, so you can combine few layers, but probably you don't need it in most cases loadingCamera:SetRenderLayers(2) currentWorld = loadingWorld -- simple minimum game loop while window:Closed() == false do -- Garbage collection step collectgarbage() -- getting all events from queue - input, UI etc. while (PeekEvent()) do local event = WaitEvent() -- You need to do it for UI in 3D scene if (currentUi) then currentUi:ProcessEvent(event) end end if (currentWorld) then -- Update game logic (positions, components etc.). By default 60 HZ and not depends on framerate if you have 60+ FPS currentWorld:Update() -- 2nd param is VSync (true by default), 3rd is fps limit. Can by changed dynamically. currentWorld:Render(framebuffer) end end Now if we start a game we will see this loading screen: And once we have a screen we can create a menu to load in. Create MainMenu.lua in Source folder. To do it in Visual Studio Code select "File" then select "New file". Type in "MainMenu.lua" and hit return. A dialog box will open asking where you want to save this file. It should open in the source folder by default but if it dosen't navigate to the source folder and hit return. Paste in the following content for this file and save: local function NewGameButtonCallback(Event, Extra) --this overload currently is not working --EmitEvent(EVENT_GAME_START, nil, 0, 0, 0, 0, 0, nil, "start.ultra") EmitEvent(EVENT_GAME_START) return true end local function ExitButtonCallback(Event, Extra) --to close application os.exit() return true end local function InitMainMenu(mainMenu) mainMenu.world = CreateWorld(); mainMenu.scene = LoadMap(mainMenu.world, "Maps/menu.ultra") --Create user interface local frameSize = framebuffer:GetSize(); mainMenu.ui = CreateInterface(mainMenu.world, font, frameSize) mainMenu.ui:SetRenderLayers(2); --to make backgrount transparent mainMenu.ui.background:SetColor(0.0, 0.0, 0.0, 0.0) --Create camera for GUI mainMenu.uiCamera = CreateCamera(mainMenu.world, PROJECTION_ORTHOGRAPHIC) mainMenu.uiCamera:SetPosition(frameSize.x * 0.5, frameSize.y * 0.5, 0); mainMenu.uiCamera:SetRenderLayers(2); --for correct rendering above 3D scene mainMenu.uiCamera:SetClearMode(CLEAR_DEPTH); --Menu buttons local newGameButton = CreateButton("New game", frameSize.x / 2 - 100, 125, 200, 50, mainMenu.ui.background); ListenEvent(EVENT_WIDGETACTION, newGameButton, NewGameButtonCallback); local exitButton = CreateButton("Exit", frameSize.x / 2 - 100, 200, 200, 50, mainMenu.ui.background); ListenEvent(EVENT_WIDGETACTION, exitButton, ExitButtonCallback); end --functions should be declared after another function that this fucntion uses function CreateMainMenu() local mainMenu = {} InitMainMenu(mainMenu) return mainMenu end Let's get back to main.lua. We need to import main menu script and custom event ids to top: import "Source/MainMenu.lua" --custom events ids EVENT_GAME_START = 1001 EVENT_MAIN_MENU = 1002 Now add after "local currentUi = nil" menu var and callback fuctions for events: framebuffer = nil local menu = nil local function StartGameEventCallback(Event, Extra) --nothing just for now return true; end --function should be declared after vars that this function uses local function MainMenuEventCallback(Event, Extra) menu = CreateMainMenu(); --switching current render and update targets for loop currentWorld = menu.world; currentUi = menu.ui; return true; end Put this above main loop: --to show Loading screen before Main Menu loadingWorld:Render(framebuffer); --ListenEvent are needed to do something in callback function when specific even from specfic source (or not, if 2nd param is nil) emitted ListenEvent(EVENT_GAME_START, nil, StartGameEventCallback); ListenEvent(EVENT_MAIN_MENU, nil, MainMenuEventCallback); --let's try it out! EmitEvent(EVENT_MAIN_MENU) Just in case if something one wrong, current main.lua main.lua We need to modify FPSPlayer component just a little bit. Via Editor you can find it by selecting "Project" ( Top right of the editor screen), select "Source", select "Components", select "Player". Double click "FPSPlayer.lua". Add to its top to other vars a new one (24th line to be precisely) FPSPlayer.doResetMousePosition = true And new condition for mouse position reset in FPSPlayer.lua in Update() at 286 line or find thine line with Ctrl-F and past to search field "window:SetMousePosition(cx, cy)" if doResetMousePosition then window:SetMousePosition(cx, cy) end One big thing left - a game to play. Add Game.lua to project at Source folder: local function GameMenuButtonCallback(Event, Extra) if (KEY_ESCAPE == Event.data and Extra) then local game = Extra local isHidden = game.menuPanel:GetHidden() game.menuPanel:SetHidden(not isHidden) if isHidden then window:SetCursor(CURSOR_DEFAULT) else window:SetCursor(CURSOR_NONE) end if (game.player ~= nil) then --to stop cursor reset to center when menu on game.player.doResetMousePosition = not isHidden end end return false end local function MainMenuButtonCallback(Event, Extra) EmitEvent(EVENT_MAIN_MENU) return true end local function ExitButtonCallback(Event, Extra) os.exit() return true end local function InitGame(game, mapPath) game.world = CreateWorld(); game.scene = LoadScene(game.world, mapPath) for k, entity in pairs(game.scene.entities) do local foundPlayer = entity:GetComponent("FPSPlayer") if (foundPlayer ~= nil) then game.player = foundPlayer; break; end end --Create user interface for game menu local frameSize = framebuffer:GetSize() game.ui = CreateInterface(game.world, font, frameSize) game.ui:SetRenderLayers(2) game.ui.background:SetColor(0.0, 0.0, 0.0, 0.0) game.uiCamera = CreateCamera(game.world, PROJECTION_ORTHOGRAPHIC) game.uiCamera:SetPosition(frameSize.x * 0.5, frameSize.y * 0.5, 0) game.uiCamera:SetRenderLayers(2); game.uiCamera:SetClearMode(CLEAR_DEPTH); --widgets are stays without extra pointers because parent widet, game.ui.background in this case, keep them --to remove widget you should do widget:SetParent(nil) game.menuPanel = CreatePanel(frameSize.x / 2 - 150, frameSize.y / 2 - 125 / 2, 300, 250, game.ui.background) local menuButton = CreateButton("Main menu", 50, 50, 200, 50, game.menuPanel); ListenEvent(EVENT_WIDGETACTION, menuButton, MainMenuButtonCallback); local exitButton = CreateButton("Exit", 50, 150, 200, 50, game.menuPanel); ListenEvent(EVENT_WIDGETACTION, exitButton, ExitButtonCallback); --we don't need game menu on screen while playing game.menuPanel:SetHidden(true); --and we will need it once hitting Esc button ListenEvent(EVENT_KEYUP, window, GameMenuButtonCallback, game); end --functions should be declared after another function that this fucntion uses function CreateGame(mapPath) local game = {} InitGame(game, mapPath) return game end Add new Game include and global var to main.lua: import "Source/Game.lua" local game = nil Update function callbacks at 24 line: local function StartGameEventCallback(Event, Extra) --destroying a main menu menu = nil --to show loading screen loadingWorld:Render(framebuffer) if Event.text ~= nil and Event.text ~= "" then --in lua .. used for string concatenation game = CreateGame("Maps/" .. Event.text); else game = CreateGame("Maps/start.ultra"); end --switching current render and update targets for loop currentWorld = game.world currentUi = game.ui return true; end --function should be declared after vars that this function uses local function MainMenuEventCallback(Event, Extra) --destroying a game instance if one existed game = nil --to show loading screen loadingWorld:Render(framebuffer) menu = CreateMainMenu() --switching current render and update targets for loop currentWorld = menu.world; currentUi = menu.ui; return true; end And in the end we have a game with own menu: All created and modified classes: LuaMenuGameLoad.zip Repository: https://github.com/Dreikblack/LuaTutorialProject/tree/menu-loading-screen-and-gui

This issue started happening since the latest update where I would load a level, and if I tested it in the editor immediately, it would work without problems, but, if I just moved a single piece of code in the flowgraph it would make the level crash when loading completely, from then on out, the level wouldn't work anymore, no matter what I did. Here's a short 2 minute video showing the problem. Things I have tried: -Re-loading the level. -Re-installing the engine. -Make a new project. I'm using the latest version of LEX 1.

Hello Everyone, So I have started working on my game in leadwerks (C++). It has been really fun so far but for some strange reason I just can't get it to work the way I want. For now the project only consists of a few files and I was working on getting my SceneManager to work. The scenemanager should create the world / load worlds etc but when I run my code it keeps flickering the screen and doesn't load up the map correct. I have tried both world->clear and world->release but it keeps flickering the loading screen and doesn't return. So I hope someone could help me out and show me what I am doing wrong here (it works in my head ). #include "SceneManager.h" using namespace Leadwerks; SceneManager::SceneManager() { this->mLoadingTexture = NULL; this->mCustomLoadingTexture = NULL; } SceneManager::~SceneManager() { } bool SceneManager::Init() { // Create / Load a default placeholder for the loading screen this->mLoadingTexture = Texture::Load("Materials/UI/Loading_Default.tex"); if (this->mLoadingTexture == NULL) return LogUtil::returnWithMessage(LogType::LOG_ERROR, "Failed to load texture: 'Materials/UI/Loading_Default.tex'"); //this->mLoadingTexture->AddRef(); // Create / Load World this->mWorld = World::Create(); } bool SceneManager::LoadScene(std::string map, World* world, Context* context) { // Unload custom loading screen if loaded //this->UnloadCustomLoadingTexture(); // Now reload the load texture // First render the Loading Screen if (FileSystem::GetFileType("Materials/UI/Loading_" + map + ".tex") != NULL){ LogUtil::writeMessage(LogType::LOG_INFO, "Custom loadingscreen found: Materials/UI/Loading_" + map + ".tex"); // Try to load it this->mCustomLoadingTexture = Texture::Load("Materials/UI/Loading_" + map + ".tex"); //this->mCustomLoadingTexture->AddRef(); } else{ LogUtil::writeMessage(LogType::LOG_DEBUG, "Map doesn't have custom loadingscreen..."); } // Next render the loading screen (as the load map function blocks) if (mCustomLoadingTexture != NULL) context->DrawImage(mCustomLoadingTexture, 0, 0, context->GetWidth(), context->GetHeight()); else context->DrawImage(mLoadingTexture, 0, 0, context->GetWidth(), context->GetHeight()); context->Sync(false); // Clear the old world Time::Pause(); if ( world != NULL ) world->Release(); world = World::Create(); // Now load the actual map if (!Map::Load("Maps/" + map + ".map")){ // Failed to load map LogUtil::writeMessage(LogType::LOG_WARNING, "Failed to load map..."); } Time::Resume(); // The map is loaded now create a scene from it // TODO: CREATE A SCENE // Unload the custom loading texture now that we have build the scene //this->UnloadCustomLoadingTexture(); return true; } void SceneManager::UnloadCustomLoadingTexture() { if (this->mCustomLoadingTexture != NULL){ this->mCustomLoadingTexture->Release(); this->mCustomLoadingTexture = NULL; } } void SceneManager::Update() { if (mWorld != NULL) mWorld->Update(); } void SceneManager::Render() { if (mWorld != NULL) mWorld->Render(); } With kind regards, StaticCube

Hello, lxFirebal69xl pointed out that the loadfile() function i used in the Notes.lua crashes the application. I tested it and it looks like loadfile can only load files that are placed normally in the game directory and not inside a zip-file. is this a bug or a feature?

... function App:SwitchLevel(levelname) self.world:Clear() self.world = World:Create() self.mapFile = name self.world:Release() end ... function App:Loop() self:ShouldSwitchLevel() --If window has been closed, end the program if self.window:Closed() or self.window:KeyDown(Key.Escape) then return false end if (self.window:KeyHit(Key.C)) then self.world:Clear() self:SwitchLevel("Maps/Level01.map") end So I have been working on a new project and it always seemed to be no big deal to load a map but right now I dont know why its not loading at all. When i press c (test) it makes the .exe not respond http://www.artur-betz.de/sdsd..html here the full App.lua

I have lots of gui graphics and i would like to combine them into a single file that won't be packaged in the zip file, would it be possible to instruct the texture loader to load from file offset and length? Something like: Texture* Load(const std::string& path, int flags=0, const uint64 fileid=0, uint64 file_offset, uint64 file_length)