ADD: Integrate SceneManager into Application, derive scene for LoadingScreen, closes #17

CMakeLists.txt

@@ -313,6 +313,12 @@ if(BUILD_GAME)
             src/engine/renderer/loader/async/AssetLoadingProgressEvent.h
             src/engine/core/scenes/Scene.cpp
             src/engine/core/scenes/Scene.h
+            src/engine/core/scenes/SceneManager.cpp
+            src/engine/core/scenes/SceneManager.h
+            src/engine/core/scenes/SplashScreen.cpp
+            src/engine/core/scenes/SplashScreen.h
+            src/engine/core/scenes/SplashScreenLayer.cpp
+            src/engine/core/scenes/SplashScreenLayer.h
     )
     target_compile_options(Dicewars_Siedler PRIVATE
             -Wall

src/engine/core/Application.cpp

@@ -5,10 +5,10 @@
 #include "Application.h"
 
 #include "EngineTime.h"
-#include "../layer/Layer.h"
 #include "../platform/glfw/InputManager.h"
 #include "inputsOutputs/stateControl/StateRegistry.h"
-
+#include "../core/scenes/SceneManager.h"
+#include "../core/scenes/Scene.h"
 Application* Application::instance = nullptr;
 
 void Application::updateTime() {
@@ -20,14 +20,10 @@ void Application::updateTime() {
     // printf("Frametime: %f\n", EngineTime::deltaTime);
 }
 
-void Application::pushLayer(Layer* layer) {
-    layers.push_back(layer);
-    layer->onAttach();
-}
-
 Application::Application()
 {
     instance = this;
+    sceneManager = std::make_unique<SceneManager>();
 
     WindowProps window_props = WindowProps();
     window_props.Width = 1280;
@@ -50,11 +46,9 @@ void Application::run() {
     {
         window->OnUpdate();
         updateTime();
-        for (Layer* layer : layers)
-            layer->onUpdate();
 
-        for (Layer* layer : layers)
-            layer->onRender();
+        sceneManager->update();
+        sceneManager->render();
 
         InputManager::update();
 

src/engine/core/Application.h

@@ -15,7 +15,8 @@
 #include "inputsOutputs/stateControl/states/State.h"
 
 
-class Layer;
+
+class SceneManager;
 
 class Application
 {
@@ -31,22 +32,17 @@ public:
     std::unique_ptr<Keyboard> keyboard;
     std::unique_ptr<Mouse> mouse;
     std::unique_ptr<StateManager> stateManager;
-
     std::shared_ptr<GameState> gameState;
+    std::unique_ptr<SceneManager> sceneManager;
 private:
     bool running = true;
     std::unique_ptr<Window> window;
-
     static Application* instance;
 
-    std::vector<Layer*> layers;
 
     void updateTime();
 
     float lastFrame;
-
-protected:
-    void pushLayer(Layer* layer);
 };
 
 

src/engine/core/gui/uiComponent/layout/LayoutEngine.h

@@ -21,12 +21,16 @@ namespace LayoutEngine {
         std::vector<ComputedLayout> children;
     };
 
-    inline float resolveDim(const SizeValue size, float parentSize, float axisLength) {
+    inline float resolveDim(const SizeValue size, float parentSize, float axisLength, float screenWidth, float screenHeight) {
         switch (size.unit) {
             case SizeUnit::Percent:
                 return size.value * parentSize;
             case SizeUnit::Pixels:
                 return size.value / axisLength; // has to be normalized!
+            case SizeUnit::Vmin: {
+                float vmin = std::min(screenWidth, screenHeight);
+                return (size.value * vmin) / axisLength;  // normalisiert
+            }
             default:
                 return 0.0f;
         }
@@ -34,10 +38,10 @@ namespace LayoutEngine {
 
     inline Dimensions computeSelfDimensions(const NodeLayout &node, const Dimensions &parent, float screenWidth, float screenHeight) {
         Dimensions d = {};
-        d.x = parent.x + resolveDim(node.layoutStyle.margin.left, parent.width, screenWidth);
-        d.y = parent.y + resolveDim(node.layoutStyle.margin.top, parent.height, screenHeight);
-        d.width = resolveDim(node.layoutStyle.width, parent.width, screenWidth);
-        d.height = resolveDim(node.layoutStyle.height, parent.height, screenHeight);
+        d.x = parent.x + resolveDim(node.layoutStyle.margin.left, parent.width, screenWidth, screenWidth, screenHeight);
+        d.y = parent.y + resolveDim(node.layoutStyle.margin.top, parent.height, screenHeight, screenWidth, screenHeight);
+        d.width = resolveDim(node.layoutStyle.width, parent.width, screenWidth, screenWidth, screenHeight);
+        d.height = resolveDim(node.layoutStyle.height, parent.height, screenHeight, screenWidth, screenHeight);
         return d;
     }
 
@@ -81,10 +85,10 @@ namespace LayoutEngine {
         result.children.resize(node.children.size());
 
         //Padding auflösen
-        float padLeft = resolveDim(node.layoutStyle.padding.left, result.self.width, screenWidth);
-        float padRight = resolveDim(node.layoutStyle.padding.right, result.self.width, screenWidth);
-        float padTop  = resolveDim(node.layoutStyle.padding.top, result.self.height, screenHeight);
-        float padBottom = resolveDim(node.layoutStyle.padding.bottom, result.self.height, screenHeight);
+        float padLeft = resolveDim(node.layoutStyle.padding.left, result.self.width, screenWidth, screenWidth, screenHeight);
+        float padRight = resolveDim(node.layoutStyle.padding.right, result.self.width, screenWidth, screenWidth, screenHeight);
+        float padTop  = resolveDim(node.layoutStyle.padding.top, result.self.height, screenHeight, screenWidth, screenHeight);
+        float padBottom = resolveDim(node.layoutStyle.padding.bottom, result.self.height, screenHeight, screenWidth, screenHeight);
 
         // Available space for children
         Dimensions innerArea = {
@@ -105,8 +109,8 @@ namespace LayoutEngine {
 
             const float mainSize = isColumn ? childLayout.self.height : childLayout.self.width;
             const float marginMain = isColumn
-                ? resolveDim(child.layoutStyle.margin.top, parent.height, screenHeight) + resolveDim(child.layoutStyle.margin.bottom, parent.height, screenHeight)
-                : resolveDim(child.layoutStyle.margin.left, parent.width, screenWidth) + resolveDim(child.layoutStyle.margin.right, parent.width, screenWidth);
+                ? resolveDim(child.layoutStyle.margin.top, parent.height, screenHeight, screenWidth, screenHeight) + resolveDim(child.layoutStyle.margin.bottom, parent.height, screenHeight, screenWidth, screenHeight)
+                : resolveDim(child.layoutStyle.margin.left, parent.width, screenWidth, screenWidth, screenHeight) + resolveDim(child.layoutStyle.margin.right, parent.width, screenWidth, screenWidth, screenHeight);
 
             totalMainSize += mainSize + marginMain;
         }
@@ -128,15 +132,15 @@ namespace LayoutEngine {
                 cursor += gap;
 
             if (isColumn) {
-                float marginTop = resolveDim(child.layoutStyle.margin.top, innerArea.height, screenHeight);
-                float marginBottom = resolveDim(child.layoutStyle.margin.bottom, innerArea.height, screenHeight);
+                float marginTop = resolveDim(child.layoutStyle.margin.top, innerArea.height, screenHeight, screenWidth, screenHeight);
+                float marginBottom = resolveDim(child.layoutStyle.margin.bottom, innerArea.height, screenHeight, screenWidth, screenHeight);
                 offsetLayout(childLayout, 0.0f, cursor);
                 cursor += childLayout.self.height + marginTop + marginBottom;
                 if (i + 1 < node.children.size())
                     cursor += node.layoutStyle.gap;
             } else {
-                float marginLeft = resolveDim(child.layoutStyle.margin.left, innerArea.width, screenWidth);
-                float marginRight = resolveDim(child.layoutStyle.margin.right, innerArea.width, screenWidth);
+                float marginLeft = resolveDim(child.layoutStyle.margin.left, innerArea.width, screenWidth, screenWidth, screenHeight);
+                float marginRight = resolveDim(child.layoutStyle.margin.right, innerArea.width, screenWidth, screenWidth, screenHeight);
                 offsetLayout(childLayout, cursor, 0.0f);
                 cursor += childLayout.self.width + marginLeft + marginRight;
                 if (i + 1 < node.children.size())
@@ -149,7 +153,7 @@ namespace LayoutEngine {
             auto&       childLayout = result.children[i];
 
             if (isColumn) {
-                float marginLeft      = resolveDim(child.layoutStyle.margin.left, innerArea.width, screenWidth);
+                float marginLeft      = resolveDim(child.layoutStyle.margin.left, innerArea.width, screenWidth, screenWidth, screenHeight);
                 float remainingCross  = innerArea.width - childLayout.self.width;
                 float oldX            = childLayout.self.x;
                 switch (node.layoutStyle.alignItems) {
@@ -163,7 +167,7 @@ namespace LayoutEngine {
                 }
                 offsetChildLayouts(childLayout, childLayout.self.x - oldX, 0.0f);
             } else {
-                float marginTop      = resolveDim(child.layoutStyle.margin.top, innerArea.height, screenHeight);
+                float marginTop      = resolveDim(child.layoutStyle.margin.top, innerArea.height, screenHeight, screenWidth, screenHeight);
                 float remainingCross = innerArea.height - childLayout.self.height;
                 float oldY           = childLayout.self.y;
                 switch (node.layoutStyle.alignItems) {

src/engine/core/gui/uiComponent/layout/LayoutStyle.h

@@ -7,7 +7,8 @@
 
 enum class SizeUnit {
     Pixels,
-    Percent
+    Percent,
+    Vmin
 };
 
 struct SizeValue {

src/engine/core/scenes/Scene.cpp

@@ -17,5 +17,6 @@ void Scene::onRender() {
 }
 
 void Scene::addLayer(std::unique_ptr<Layer> layer) {
+    layer->onAttach();
     layers.push_back(std::move(layer));
 }

src/engine/core/scenes/Scene.h

@@ -8,13 +8,19 @@
 #include <vector>
 
 #include "../../layer/Layer.h"
+#include "../../renderer/loader/async/AssetLoader.h"
 
 
 class Scene {
 public:
     virtual ~Scene() = default;
     virtual void onEnter() {} //Layer registrieren
-    virtual void onExit() {} //Aufräumen, Daten unloaden
+    virtual void onExit() {
+        for (const auto& layer : layers) {
+            layer->onDetach();
+        }
+    } //Aufräumen, Daten unloaden
+    virtual std::vector<AssetRequest> getRequiredAssets() {return {};}
     void onUpdate();
     void onRender();
 

src/engine/core/scenes/SceneManager.cpp

@@ -0,0 +1,47 @@
+//
+// Created by sebastian on 21.04.26.
+//
+
+#include "SceneManager.h"
+
+#include "Scene.h"
+#include "spdlog/spdlog.h"
+
+void SceneManager::switchTo(std::unique_ptr<Scene> next) {
+    nextScene = std::move(next);
+    std::vector<AssetRequest> requestedAssets = nextScene->getRequiredAssets();
+    spdlog::debug("Required assets: {}", requestedAssets.size());
+    for (AssetRequest& request : requestedAssets) {
+        assetLoader.scheduleAsset(request);
+    }
+
+    assetLoader.start();
+}
+
+void SceneManager::update() {
+    if (nextScene) {
+        assetLoader.processUploadQueue(2);
+
+        if (assetLoader.getProgress().isDone()) {
+            if (currentScene) {
+                currentScene->onExit();
+            }
+            currentScene = std::move(nextScene);
+            nextScene = nullptr;
+            currentScene->onEnter();
+            assetLoader.stop();
+        }
+    }
+
+    if (currentScene) {
+        currentScene->onUpdate();
+    }
+}
+
+void SceneManager::render() {
+    if (currentScene) {
+        currentScene->onRender();
+    }
+}
+
+SceneManager::~SceneManager() = default;

src/engine/core/scenes/SceneManager.h

@@ -0,0 +1,29 @@
+//
+// Created by sebastian on 21.04.26.
+//
+
+#ifndef SCENEMANAGER_H
+#define SCENEMANAGER_H
+#include <memory>
+
+#include "../../renderer/loader/async/AssetLoader.h""
+class Scene;
+
+class SceneManager {
+public:
+    void switchTo(std::unique_ptr<Scene> next);
+    void update();
+    void render();
+    ~SceneManager();
+private:
+    std::unique_ptr<Scene> currentScene;
+    std::unique_ptr<Scene> nextScene;
+
+    AssetLoader assetLoader;
+
+    bool isTransitioning = false;
+};
+
+
+
+#endif //SCENEMANAGER_H

src/engine/core/scenes/SplashScreen.cpp

@@ -0,0 +1,21 @@
+//
+// Created by sebastian on 21.04.26.
+//
+
+#include "SplashScreen.h"
+
+#include "SplashScreenLayer.h"
+
+std::vector<AssetRequest> SplashScreen::getRequiredAssets() {
+    std::vector<AssetRequest> requests;
+    requests.push_back(TextureRequest("logo", "assets/logo.png"));
+    return requests;
+}
+
+void SplashScreen::onEnter() {
+    addLayer(std::make_unique<SplashScreenLayer>());
+}
+
+void SplashScreen::onExit() {
+    Scene::onExit();
+}

src/engine/core/scenes/SplashScreen.h

@@ -0,0 +1,20 @@
+//
+// Created by sebastian on 21.04.26.
+//
+
+#ifndef SPLASHSCREEN_H
+#define SPLASHSCREEN_H
+#include "Scene.h"
+
+
+class SplashScreen : public Scene {
+public:
+    std::vector<AssetRequest> getRequiredAssets() override;
+    void onEnter() override;
+    void onExit() override;
+
+};
+
+
+
+#endif //SPLASHSCREEN_H

src/engine/core/scenes/SplashScreenLayer.cpp

@@ -0,0 +1,49 @@
+//
+// Created by sebastian on 21.04.26.
+//
+
+#include "SplashScreenLayer.h"
+
+#include "../../renderer/loader/AssetManager.h"
+#include "../../renderer/GUIRenderer.h"
+#include "../gui/uiComponent/UiImage.h"
+#include "../gui/uiMain/UiContainer.h"
+#include "spdlog/spdlog.h"
+
+SplashScreenLayer::SplashScreenLayer() {
+    guiRenderer = std::make_unique<GUIRenderer>(Loader::instance());
+}
+
+void SplashScreenLayer::onRender() {
+    UiRenderBundle renderBundle;
+    if (rootContainer) {
+        rootContainer->collectRenderData(renderBundle);
+    }
+
+    auto guis = renderBundle.getGUITextures();
+    guiRenderer->render(guis);
+}
+
+void SplashScreenLayer::onUpdate() {
+    Dimensions rootParent {0.0, 0.0, 1.0, 1.0f};
+    rootContainer->uiPositioner.compute(rootParent);
+}
+
+void SplashScreenLayer::onAttach() {
+    rootContainer = std::make_unique<UiContainer>();
+
+    auto logoLayoutStyle = LayoutStyle();
+    logoLayoutStyle.width = SizeValue(0.5f, SizeUnit::Vmin);
+    logoLayoutStyle.height = SizeValue(0.5f, SizeUnit::Vmin);
+
+    rootContainer->getLayoutStyle().justifyContent = JustifyContent::Center;
+    rootContainer->getLayoutStyle().alignItems = AlignItems::Center;
+
+    rootContainer->addChild<UiImage>(std::make_unique<UiImage>(AssetManager::getTexture("logo")->getTextureID(), logoLayoutStyle));
+}
+
+void SplashScreenLayer::onDetach() {
+    Layer::onDetach();
+}
+
+SplashScreenLayer::~SplashScreenLayer() = default;

src/engine/core/scenes/SplashScreenLayer.h

@@ -0,0 +1,26 @@
+//
+// Created by sebastian on 21.04.26.
+//
+
+#ifndef SPLASHSCREENLAYER_H
+#define SPLASHSCREENLAYER_H
+#include "../../layer/Layer.h"
+
+#include "../../renderer/GUIRenderer.h"
+#include "../../core/gui/uiMain/UiContainer.h"
+class SplashScreenLayer: public Layer {
+public:
+    SplashScreenLayer();
+    virtual void onRender() override;
+    virtual void onUpdate() override;
+    virtual void onAttach() override;
+    virtual void onDetach() override;
+    ~SplashScreenLayer() override;
+private:
+    std::unique_ptr<UiContainer> rootContainer;
+    std::unique_ptr<GUIRenderer> guiRenderer;
+};
+
+
+
+#endif //SPLASHSCREENLAYER_H

src/engine/renderer/loader/async/AssetLoader.cpp

@@ -12,34 +12,28 @@
 #include "../OBJLoader.h"
 #include "../TextureLoader.h"
 #include "../../../core/events/EventBus.h"
+#include "spdlog/spdlog.h"
 
 namespace fs = std::filesystem;
 
-void AssetLoader::scheduleTexture(const std::string &name, const std::string &path) {
-    {
-        std::lock_guard lock(pendingMutex);
-        pendingQueue.push(TextureRequest{name, path});
-        ++total;
-    }
-    pendingCV.notify_one();
-}
 
-void AssetLoader::scheduleModel(const std::string &name, const std::string &objPath) {
+void AssetLoader::scheduleAsset(const AssetRequest &assetRequest) {
     {
         std::lock_guard lock(pendingMutex);
-        pendingQueue.push(ModelRequest{name, objPath});
+        pendingQueue.push(assetRequest);
         ++total;
     }
     pendingCV.notify_one();
-}
-
-void AssetLoader::scheduleAsset(const std::string &name, const std::string &assetPath) {
-    {
-        std::lock_guard lock(pendingMutex);
-        pendingQueue.push(StagedModelRequest{name, assetPath});
-        ++total;
+    std::visit([]<typename T>(const T& req) -> void {
+       using Type = std::decay_t<T>;
+       if constexpr (std::is_same_v<Type, TextureRequest>) {
+           spdlog::debug("Scheduled Texture Request: {} -> {}", req.name, req.path);
+       } else if constexpr (std::is_same_v<Type, ModelRequest>) {
+           spdlog::debug("Scheduled Model Request: {} -> {}", req.name, req.objPath);
+       } else if constexpr (std::is_same_v<Type, StagedModelRequest>) {
+           spdlog::debug("Scheduled Staged Model Request: {} -> {}", req.name, req.assetPath);
        }
-    pendingCV.notify_one();
+   }, assetRequest);
 }
 
 void AssetLoader::start() {
@@ -97,6 +91,7 @@ void AssetLoader::loadingThreadFunc() {
 }
 
 RawTextureData AssetLoader::processTextureRequest(const TextureRequest &request) {
+    spdlog::debug("Processing Texture Request: {} -> {}", request.name, request.path);
     RawTextureData textureData = TextureLoader::loadRawTextureData(request.path, request.flipVertically);
     textureData.name = request.name;
     return textureData;

src/engine/renderer/loader/async/AssetLoader.h

@@ -5,6 +5,7 @@
 #ifndef ASSETLOADER_H
 #define ASSETLOADER_H
 #include <condition_variable>
+#include <format>
 #include <queue>
 #include <string>
 #include <variant>
@@ -39,6 +40,27 @@ struct StagedModelRequest {
 using AssetRequest = std::variant<TextureRequest, ModelRequest, StagedModelRequest>;
 using IntermediateAsset = std::variant<RawTextureData, RawModelData, RawStagedModelData>;
 
+inline std::string assetRequestToString(const AssetRequest& request) {
+    return std::visit([]<typename T>(const T& req) -> std::string {
+        using Type = std::decay_t<T>;
+        if constexpr (std::is_same_v<Type, TextureRequest>) {
+            return std::format("TextureRequest{{name='{}', path='{}'}}", req.name, req.path);
+        } else if constexpr (std::is_same_v<Type, ModelRequest>) {
+            return std::format("ModelRequest{{name='{}', objPath='{}'}}", req.name, req.objPath);
+        } else if constexpr (std::is_same_v<Type, StagedModelRequest>) {
+            return std::format("StagedModelRequest{{name='{}', assetPath='{}'}}", req.name, req.assetPath);
+        }
+    }, request);
+}
+
+template <>
+struct std::formatter<AssetRequest> {
+    constexpr auto parse(std::format_parse_context& ctx) { return ctx.begin(); }
+    auto format(const AssetRequest& request, std::format_context& ctx) const {
+        return std::format_to(ctx.out(), "{}", assetRequestToString(request));
+    }
+};
+
 struct LoadingProgress {
     int total;
     int loaded;
@@ -52,9 +74,7 @@ struct LoadingProgress {
 
 class AssetLoader {
 public:
-    void scheduleTexture(const std::string& name, const std::string& path);
-    void scheduleModel(const std::string& name, const std::string& objPath);
-    void scheduleAsset(const std::string& name, const std::string& assetPath);
+    void scheduleAsset(const AssetRequest& assetRequest);
 
     void start();
     void stop();

src/game/DicewarsApp.cpp

@@ -4,9 +4,9 @@
 
 #include "DicewarsApp.h"
 
-#include "GameLayer.h"
-#include "UILayer.h"
+#include "../engine/core/scenes/SceneManager.h"
+#include "../engine/core/scenes/SplashScreen.h"
 
 DicewarsApp::DicewarsApp() {
-
+    sceneManager->switchTo(std::make_unique<SplashScreen>());
 }