From 63c64254a80564e11987ba4af289cf8d47774668 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Mon, 25 Apr 2022 00:18:36 +0200
Subject: Added move constraints

---
 GameScreen.cpp |  7 +++++--
 Player.cpp     | 18 +++++++++++++++++-
 Player.h       |  1 +
 Stage.h        |  2 ++
 TestStage.cpp  |  1 -
 TestStage.h    |  1 -
 6 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/GameScreen.cpp b/GameScreen.cpp
index a5b4c6c..aeda96b 100644
--- a/GameScreen.cpp
+++ b/GameScreen.cpp
@@ -11,12 +11,15 @@
 
 
 static constexpr Color INTERFACE {0, 0, 0, 230};
+static constexpr float BAR_WIDTH {160};
 
 
 GameScreen::GameScreen(std::unique_ptr<Stage> stage) :
     m_stage {std::move(stage)},
     m_stats {std::make_shared<Stats>()}
 {
+    m_stage->m_player.m_playground = Rectangle{
+        BAR_WIDTH, 0, GetScreenWidth() - 2 * BAR_WIDTH, static_cast<float>(GetScreenHeight())};
     m_stage->m_stats = m_stats;
 }
 
@@ -34,8 +37,8 @@ void
 GameScreen::draw()
 {
     m_stage->draw();
-    DrawRectangle(0, 0, 160, 600, INTERFACE);
-    DrawRectangle(800 - 160, 0, 160, 600, INTERFACE);
+    DrawRectangle(0, 0, BAR_WIDTH, 600, INTERFACE);
+    DrawRectangle(800 - BAR_WIDTH, 0, BAR_WIDTH, 600, INTERFACE);
     DrawText(TextFormat("%d", m_stats->total_bullets), 5, 25, 20, DARKGRAY);
     DrawText(TextFormat("%d", m_stats->lifes), 5, 45, 20, DARKGREEN);
     DrawText(TextFormat("%d", m_stats->points), 5, 65, 20, GOLD);
diff --git a/Player.cpp b/Player.cpp
index 4e13ad0..94371c1 100644
--- a/Player.cpp
+++ b/Player.cpp
@@ -13,6 +13,7 @@ static constexpr float MAX_SPEED {180};
 static constexpr float DAMP {2200};
 static constexpr float MARGIN {0.3f};
 static constexpr float HIT_INVUL {1.2f};
+static constexpr float RADIUS {4};
 
 
 static float damped_velocity(float dt, float direction, float velocity);
@@ -22,6 +23,7 @@ Player::Player() :
     m_invulnerability {HIT_INVUL / 2.f},
     m_position {400, 450},
     m_velocity {0, 0},
+    m_playground {0, 0, 800, 600},
     m_controller {std::make_unique<KeyboardController>()}
 {
 }
@@ -35,6 +37,20 @@ Player::update(const float dt)
     m_velocity.y = std::clamp(damped_velocity(dt, direction.y, m_velocity.y), -MAX_SPEED, MAX_SPEED);
     m_position.x += m_velocity.x * dt;
     m_position.y += m_velocity.y * dt;
+    if (m_position.y < m_playground.y + RADIUS || m_position.y > m_playground.y + m_playground.height - RADIUS) {
+        m_position.y =
+            m_position.y < m_playground.y + m_playground.height / 2 ?
+            m_playground.y + RADIUS :
+            m_playground.y + m_playground.height - RADIUS;
+        m_velocity.y = 0;
+    }
+    if (m_position.x < m_playground.x + RADIUS || m_position.x > m_playground.x + m_playground.width - RADIUS) {
+        m_position.x =
+            m_position.x < m_playground.x + m_playground.width / 2 ?
+            m_playground.x + RADIUS :
+            m_playground.x + m_playground.width - RADIUS;
+        m_velocity.x = 0;
+    }
     m_invulnerability -= dt;
 }
 
@@ -42,7 +58,7 @@ Player::update(const float dt)
 void
 Player::draw()
 {
-    DrawCircle(m_position.x, m_position.y, 4, m_invulnerability > 0 ? RED : LIGHTGRAY);
+    DrawCircle(m_position.x, m_position.y, RADIUS, m_invulnerability > 0 ? RED : LIGHTGRAY);
 }
 
 
diff --git a/Player.h b/Player.h
index b1cb629..d831234 100644
--- a/Player.h
+++ b/Player.h
@@ -18,6 +18,7 @@ struct Player
     float m_invulnerability;
     Vector2 m_position;
     Vector2 m_velocity;
+    Rectangle m_playground;
     std::unique_ptr<Controller> m_controller;
 };
 
diff --git a/Stage.h b/Stage.h
index fcb69b3..e5b4172 100644
--- a/Stage.h
+++ b/Stage.h
@@ -2,6 +2,7 @@
 
 #include <memory>
 
+#include "Player.h"
 #include "Stats.h"
 
 
@@ -10,5 +11,6 @@ struct Stage
     virtual ~Stage() = default;
     virtual void update(float dt) = 0;
     virtual void draw() = 0;
+    Player m_player;
     std::shared_ptr<Stats> m_stats;
 };
diff --git a/TestStage.cpp b/TestStage.cpp
index 7dd5779..4aa1767 100644
--- a/TestStage.cpp
+++ b/TestStage.cpp
@@ -9,7 +9,6 @@ static constexpr Color DEEPSPACE {3, 5, 22, 255};
 
 
 TestStage::TestStage() :
-    m_player {},
     m_const {}
 {
     m_enemies.reserve(5);
diff --git a/TestStage.h b/TestStage.h
index 7ddbe06..776d32f 100644
--- a/TestStage.h
+++ b/TestStage.h
@@ -15,7 +15,6 @@ public:
     void update(float dt) override;
     void draw() override;
 private:
-    Player m_player;
     ConstantVelocitySystem m_const;
     std::vector<Enemy> m_enemies;
 };
-- 
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