Engine now supports window resize

core/Engine.cpp

@@ -69,6 +69,13 @@ Engine::Engine(int windowWidth, int windowHeight, const char *name = "Feather Pr
         engine->mouseY = ypos;
     });
 
+    glfwSetFramebufferSizeCallback(window, [](GLFWwindow *window, int width, int height) {
+        glViewport(0, 0, width, height);
+
+        auto *engine = static_cast<Engine *>(glfwGetWindowUserPointer(window));
+        engine->onWindowResizeObservable.notifyObservers(width, height);
+    });
+
     setClearColor(0.1f, 0.1f, 0.1f, 1.0f);
 
     glDepthFunc(GL_LESS);   // Specify the depth test for the z-buffer

core/Engine.h

@@ -51,6 +51,8 @@ class Engine {
 
     Observable<> onExecuteLoopObservable{};
 
+    Observable<int, int> onWindowResizeObservable{};
+
     Observable<int> onKeyPressObservable{};
     Observable<int> onKeyReleaseObservable{};
     Observable<double, double> onMouseScrollObservable{};

core/Scene.h

@@ -12,6 +12,14 @@
 
 class Scene {
 public:
+    explicit Scene(Engine *engine) {
+        _engine = engine;
+
+        _engine->onWindowResizeObservable.add([this](int width, int height) {
+            this->_activeCamera->setAspectRatio(static_cast<float>(width) / static_cast<float>(height));
+        });
+    }
+
     void addMesh(Mesh *mesh);
 
     void setActiveCamera(Camera *camera);
@@ -22,7 +30,9 @@ class Scene {
     Observable<> onAfterRenderObservable{};
 
 private:
-    std::vector<Mesh*> _meshes;
+    Engine *_engine;
+
+    std::vector<Mesh *> _meshes;
     Camera *_activeCamera = nullptr;
 };
 

main.cpp

@@ -13,7 +13,7 @@ const int WINDOW_HEIGHT = 600;
 int main() {
     Engine engine(WINDOW_WIDTH, WINDOW_HEIGHT, "Solar System");
 
-    Scene scene;
+    Scene scene(&engine);
 
     OrbitCamera camera(&engine);
     camera.setPosition(0, 0, 20);