feat: Add IntroStage

Added a stage which can be used to display a logo or some
introduction text.

include/game/Constants.hpp

@@ -104,7 +104,7 @@ namespace COLOURS {
 }
 
 namespace TIMINGS {
-
+	const float INTRO_OPEN_TIME = 4.0f;
 }
 
 namespace TRANSITIONS {
@@ -152,4 +152,4 @@ namespace BUTTONS {
 
 namespace GAME {
 
-}
+}

include/game/MenuStages.hpp

@@ -1,11 +1,25 @@
 #pragma once
 
 #include "BaseStage.hpp"
+#include "Font.hpp"
+#include "Timer.hpp"
 
 #include "Constants.hpp"
 
 #include "GameStages.hpp"
 
+class IntroStage : public Framework::BaseStage {
+public:
+	void start();
+
+	bool update(float dt);
+	void render();
+
+private:
+	Framework::Timer intro_timer;
+	Framework::Text intro_text;
+};
+
 class TitleStage : public Framework::BaseStage {
 public:
 	void start();

src/game/Game.cpp

@@ -5,7 +5,7 @@ Game::Game() : BaseGame() {
 }
 
 void Game::start() {
-	stage = new TitleStage();
+	stage = new IntroStage();
 }
 
 void Game::end() {
@@ -64,4 +64,4 @@ void Game::clear_data() {
 	// Don't need to clear up graphics objects items - it's done for us in BaseGame
 
 	// Clear up anything else we need to
-}
+}

src/game/MenuStages.cpp

@@ -1,5 +1,49 @@
 #include "MenuStages.hpp"
 
+// IntroStage
+
+void IntroStage::start() {
+	intro_text = Framework::Text(graphics_objects->font_ptrs[GRAPHICS_OBJECTS::FONTS::MAIN_FONT], "Some intro text", COLOURS::BLACK);
+
+	intro_timer.stop();
+
+	// Start transition
+	set_transition(graphics_objects->transition_ptrs[GRAPHICS_OBJECTS::TRANSITIONS::FADE_TRANSITION]);
+	transition->open();
+}
+
+bool IntroStage::update(float dt) {
+	transition->update(dt);
+	intro_timer.update(dt);
+
+	if (transition->is_open()) {
+		if (intro_timer.running()) {
+			if (intro_timer.time() >= TIMINGS::INTRO_OPEN_TIME) {
+				transition->close();
+			}
+		}
+		else {
+			intro_timer.reset();
+			intro_timer.start();
+		}
+	}
+	else if (transition->is_closed()) {
+		// Finish intro
+		finish(new TitleStage());
+	}
+
+	return true;
+}
+
+void IntroStage::render() {
+	graphics_objects->graphics_ptr->fill(COLOURS::BLUE);
+
+	// Display some intro text in the centre of the display
+	intro_text.render(WINDOW::SIZE_HALF);
+
+	transition->render();
+}
+
 // TitleStage
 
 void TitleStage::start() {