From 7c9c492f1555bb84a43fc68a56f69c25b54e7346 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Mon, 18 Apr 2022 11:35:25 +0200
Subject: Separated Stage from GameScreen

---
 CMakeLists.txt  |  1 +
 GameScreen.cpp  | 24 +++++++++++++-----------
 GameScreen.h    | 12 +++++-------
 Stage.h         | 10 ++++++++++
 TestStage.cpp   | 35 +++++++++++++++++++++++++++++++++++
 TestStage.h     | 20 ++++++++++++++++++++
 TitleScreen.cpp |  3 ++-
 7 files changed, 86 insertions(+), 19 deletions(-)
 create mode 100644 Stage.h
 create mode 100644 TestStage.cpp
 create mode 100644 TestStage.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 32c3787..5b2d655 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@ add_executable(
     GameScreen.cpp
     main.cpp
     Player.cpp
+    TestStage.cpp
     TitleScreen.cpp
 )
 target_link_libraries(${PROJECT_NAME} raylib)
diff --git a/GameScreen.cpp b/GameScreen.cpp
index 4315060..02aab00 100644
--- a/GameScreen.cpp
+++ b/GameScreen.cpp
@@ -1,11 +1,15 @@
 #include "GameScreen.h"
 
+#include <memory>
+#include <utility>
+
 #include <raylib.h>
 
+#include "Stage.h"
+
 
-GameScreen::GameScreen() :
-    m_const {},
-    m_generator {m_const.m_bullets}
+GameScreen::GameScreen(std::unique_ptr<Stage> stage) :
+    m_stage {std::move(stage)}
 {
 }
 
@@ -13,19 +17,17 @@ GameScreen::GameScreen() :
 void
 GameScreen::update(const float dt)
 {
-    m_player.update(dt);
-    m_generator.update(dt);
-    m_const.update(dt);
-    bool collided = m_player.collide(m_const.m_bullets);
-    (void) collided;
+    if (m_stage)
+        m_stage->update(dt);
 }
 
 
 void
 GameScreen::draw()
 {
-    m_const.draw();
-    m_player.draw();
+    if (m_stage) {
+        m_stage->draw();
+        DrawText(TextFormat("%d", m_stage->total_bullets()), 5, 25, 20, DARKGRAY);
+    }
     DrawFPS(5, 5);
-    DrawText(TextFormat("%d", m_const.m_bullets.size()), 5, 25, 20, DARKGRAY);
 }
diff --git a/GameScreen.h b/GameScreen.h
index 11d5b73..5b43512 100644
--- a/GameScreen.h
+++ b/GameScreen.h
@@ -1,21 +1,19 @@
 #pragma once
 
+#include <memory>
+
 #include <raylib.h>
 
-#include "ConstantVelocity.h"
-#include "ExampleGenerator.h"
-#include "Player.h"
 #include "Screen.h"
+#include "Stage.h"
 
 
 class GameScreen : public Screen
 {
 public:
-    GameScreen();
+    explicit GameScreen(std::unique_ptr<Stage> stage);
     void update(float dt) override;
     void draw() override;
 private:
-    Player m_player;
-    ConstantVelocitySystem m_const;
-    ExampleGenerator m_generator;
+    std::unique_ptr<Stage> m_stage;
 };
diff --git a/Stage.h b/Stage.h
new file mode 100644
index 0000000..0a0cb46
--- /dev/null
+++ b/Stage.h
@@ -0,0 +1,10 @@
+#pragma once
+
+
+struct Stage
+{
+    virtual ~Stage() = default;
+    virtual void update(float dt) = 0;
+    virtual void draw() = 0;
+    virtual int total_bullets() const = 0;
+};
diff --git a/TestStage.cpp b/TestStage.cpp
new file mode 100644
index 0000000..b257cf6
--- /dev/null
+++ b/TestStage.cpp
@@ -0,0 +1,35 @@
+#include "TestStage.h"
+
+
+TestStage::TestStage() :
+    m_player {},
+    m_const {},
+    m_generator {m_const.m_bullets}
+{
+}
+
+
+void
+TestStage::update(const float dt)
+{
+    m_player.update(dt);
+    m_generator.update(dt);
+    m_const.update(dt);
+    bool collided = m_player.collide(m_const.m_bullets);
+    (void) collided;
+}
+
+
+void
+TestStage::draw()
+{
+    m_const.draw();
+    m_player.draw();
+}
+
+
+int
+TestStage::total_bullets() const
+{
+    return m_const.m_bullets.size();
+}
diff --git a/TestStage.h b/TestStage.h
new file mode 100644
index 0000000..10164cd
--- /dev/null
+++ b/TestStage.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "ConstantVelocity.h"
+#include "ExampleGenerator.h"
+#include "Player.h"
+#include "Stage.h"
+
+
+class TestStage : public Stage
+{
+public:
+    TestStage();
+    void update(float dt) override;
+    void draw() override;
+    int total_bullets() const override;
+private:
+    Player m_player;
+    ConstantVelocitySystem m_const;
+    ExampleGenerator m_generator;
+};
diff --git a/TitleScreen.cpp b/TitleScreen.cpp
index 3994fe9..0bf52f8 100644
--- a/TitleScreen.cpp
+++ b/TitleScreen.cpp
@@ -7,6 +7,7 @@
 #include "Game.h"
 #include "GameScreen.h"
 #include "Globals.h"
+#include "TestStage.h"
 
 
 static constexpr const char* TITLE {"Generic Bullet HELL"};
@@ -31,7 +32,7 @@ TitleScreen::update(const float dt)
     if (m_blink > 2 * INTERVAL)
         m_blink -= 2 * INTERVAL;
     if (IsKeyPressed(KEY_SPACE))
-        g_game.set(std::make_unique<GameScreen>());
+        g_game.set(std::make_unique<GameScreen>(std::make_unique<TestStage>()));
 }
 
 
-- 
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