feat: add play / editor mode

lightkeeper/include/Lightkeeper.h

@@ -1,6 +1,7 @@
 #ifndef LIGHTKEEPER_H
 #define LIGHTKEEPER_H
 
+#include <optional>
 #include <string>
 
 #include <destrum/App.h>
@@ -28,6 +29,7 @@ public:
 
     void onWindowResize(int newWidth, int newHeight) override;
     void customWindowsMenu() override;
+    void onPlayModeChanged(bool nowPlaying) override;
 
 private:
     void setupSkybox();
@@ -53,6 +55,7 @@ private:
     void submitColliderDebugLines();
 
     Camera camera{glm::vec3(0.f, 0.f, -5.f), glm::vec3(0, 1, 0)};
+    std::optional<Camera> editorCamera;
 
     std::unique_ptr<CubeMap> skyboxCubemap;
     MainSceneObjects mainScene{};

lightkeeper/src/Lightkeeper.cpp

@@ -83,7 +83,7 @@ void LightKeeper::updateViewMode()
     auto& input = InputManager::GetInstance();
     FirstPersonController* player = mainScene.playerController;
 
-    if (player != nullptr && input.WasKeyPressed(SDL_SCANCODE_F5))
+    if (isPlaying() && player != nullptr && input.WasKeyPressed(SDL_SCANCODE_F6))
     {
         player->SetPossessed(!player->IsPossessed());
     }
@@ -100,13 +100,13 @@ void LightKeeper::updateViewMode()
 
 bool LightKeeper::isPlayerViewActive() const
 {
-    return mainScene.playerController != nullptr && mainScene.playerController->IsPossessed();
+    return isPlaying() && mainScene.playerController != nullptr && mainScene.playerController->IsPossessed();
 }
 
 CameraComponent* LightKeeper::getSceneCamera() const
 {
     const auto& activeScenes = SceneManager::GetInstance().GetActiveScenes();
-    if (useFreeCamera || activeScenes.empty()) {
+    if (!isPlaying() || useFreeCamera || activeScenes.empty()) {
         return nullptr;
     }
     return activeScenes.front()->GetCurrentCamera();
@@ -187,6 +187,23 @@ void LightKeeper::customFixedUpdate(float dt)
     SceneManager::GetInstance().FixedUpdate(dt);
 }
 
+void LightKeeper::onPlayModeChanged(bool nowPlaying)
+{
+    findPlayer();
+    if (nowPlaying) {
+        // The player view moves the free camera, put it back where the editor left it on Stop
+        editorCamera = camera;
+        if (mainScene.playerController != nullptr) {
+            mainScene.playerController->SetPossessed(true);
+        }
+    } else if (editorCamera) {
+        const float aspectRatio = camera.GetAspectRatio();
+        camera = *editorCamera;
+        camera.setAspectRatio(aspectRatio);
+        editorCamera.reset();
+    }
+}
+
 void LightKeeper::onWindowResize(int newWidth, int newHeight)
 {
     renderer.resize(gfxDevice, glm::ivec2{newWidth, newHeight});

lightkeeper/src/main.cpp

@@ -28,6 +28,7 @@ int main(int argc, char* argv[]) {
             .appName = "Destrum Engine",
             .windowTitle = "Lightkeeper",
             .exeDir = exeDir,
+            .startInEditMode = true,
         });
         app.run();
         app.cleanup();