battle transition

src/engine/include/Supergoon/ECS/Components/GameStateComponent.hpp

@@ -7,6 +7,7 @@ struct GameState {
 	int WindowWidth;
 	bool Loading;
 	bool CameraFollowTarget;
+	bool EnteringBattle;
 	// Level* CurrentLevel;
 };
 }  // namespace Supergoon

src/engine/include/Supergoon/World/Level.hpp

@@ -30,6 +30,7 @@ class Level {
 	void LoadAllGameObjects();
 	void RestartLevel();
 	void CreateBackgroundImage();
+	static void SetBackGroundColor(Color color = Color{255, 255, 255, 255});
 	template <typename T>
 	static T *GetCurrentLevelProperty(std::string key);
 

src/engine/src/World/Level.cpp

@@ -293,3 +293,6 @@ void Level::Draw() {
 	}
 }
 
+void Level::SetBackGroundColor(Color color) {
+	_currentLevel->_background->SetImageColor(color);
+}

src/game/Systems/CameraSystem.cpp

@@ -11,6 +11,8 @@ void getFollowTarget(CameraComponent& cc) {
 		cc.FollowTarget = &lc;
 	});
 }
+float colorFade = 255;
+static Tween* tweener = new Tween(255, 0, 1.0, &colorFade, Supergoon::Easings::Linear);
 
 void UpdateCamera() {
 	auto c = GameObject::GetGameObjectWithComponents<CameraComponent>();
@@ -20,6 +22,16 @@ void UpdateCamera() {
 	}
 	auto& cc = c->GetComponent<CameraComponent>();
 	auto& gc = g->GetComponent<GameState>();
+	if (gc.EnteringBattle) {
+		// We should instead slowly decrement camera x
+		tweener->Update();
+		cc.Box.X -= 5;
+
+		auto color = Color{255, (uint8_t)colorFade, (uint8_t)colorFade, (uint8_t)colorFade};
+		Level::SetBackGroundColor(color);
+		Events::PushEvent(Events::BuiltinEvents.CameraUpdate, true, (void*)&cc.Box);
+		return;
+	}
 	if (!gc.CameraFollowTarget) {
 		return;
 	}

src/game/Systems/PlayerSystem.cpp

@@ -32,7 +32,7 @@ static void playerInput(GameObject go, PlayerComponent& player) {
 	auto state = GameObject::GetGameObjectWithComponents<GameState>();
 	auto& stateComponent = state->GetComponent<GameState>();
 	assert(state.has_value());
-	if (stateComponent.Loading) {
+	if (stateComponent.Loading || stateComponent.EnteringBattle) {
 		return;
 	}
 	auto vel = Vector2();
@@ -63,6 +63,15 @@ static void playerInput(GameObject go, PlayerComponent& player) {
 		moved = true;
 		newDirection = Directions::West;
 	}
+	if (KeyDown(KeyboardKeys::Key_B)) {
+		// Start battle transition.
+		stateComponent.CameraFollowTarget = false;
+		stateComponent.EnteringBattle = true;
+		Events::PushEvent(Events::BuiltinEvents.PlayBgmEvent, 0, (void*)strdup("battle1"));
+		anim.Playing = false;
+		return;
+		// Camera component handles the sliding.
+	}
 	auto deltatime = (float)Game::DeltaTime();
 	vel *= Vector2{deltatime, deltatime};
 	// Handle Collisions