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--- youtube:sfml-base [2024/02/28 18:26] – 削除 - 外部編集 (不明な日付) 127.0.0.1
+++ youtube:sfml-base [2024/03/03 07:15] (現在) – [Cargo.toml] freemikan
@@ 行 1: / 行 1: @@
+====== SFMLの基礎 ======
+作成日: 2022-12-07 (水)
+===== src/main.rs =====
+<file rust>
+// https://github.com/SFML/SFML-Game-Development-Book/tree/master/01_Intro
+use sfml::{
+    system::{
+        Vector2f,
+        Clock,
+        Time
+    },
+    window::{
+        Event,
+        Style,
+        Key
+    },
+    graphics::{
+        RenderTarget,
+        RenderWindow,
+        Transformable,
+        Color,
+        Sprite,
+        Texture,
+    },
+    SfBox
+};
+struct ResourceManager {
+    player_texture: SfBox<Texture>
+}
+fn load_resources() -> ResourceManager {
+    ResourceManager {
+        player_texture: Texture::from_file("media/eagle.png").unwrap()
+    }
+}
+struct MoveFlags {
+    up: bool,
+    down: bool,
+    left: bool,
+    right: bool
+}
+struct Game<'a> {
+    window: RenderWindow,
+    player: Sprite<'a>,
+    player_speed: f32,
+    move_flags: MoveFlags
+}
+impl<'a> Game<'a> {
+    const FRAMES_PER_SECOND: f32 = 60.0; // Time::seconds(1.0 / 60.0) is not allowed for const
+    pub fn new(resman: &'a ResourceManager) -> Game<'a> {
+        let window = RenderWindow::new(
+            (640, 480),
+            "SFML Application",
+            Style::CLOSE,
+            &Default::default());
+        Game {
+            window,
+            player: Sprite::with_texture(&resman.player_texture),
+            player_speed: 100.0,
+            move_flags: MoveFlags {
+                up: false,
+                down: false,
+                left: false,
+                right: false
+            }
+        }
+    }
+    pub fn run(&mut self) {
+        let mut clock = Clock::start();
+        let mut time_since_last_update = Time::ZERO;
+        let time_per_frame = Time::seconds(1.0 / Self::FRAMES_PER_SECOND);
+        while self.window.is_open() {
+            self.process_events();
+            time_since_last_update += clock.restart();
+            while time_since_last_update > time_per_frame {
+                time_since_last_update -= time_per_frame;
+                self.process_events();
+                self.update(&time_per_frame);
+            }
+            self.render();
+        }
+    }
+    fn process_events(&mut self) {
+        while let Some(event) = self.window.poll_event() {
+            match event {
+                Event::Closed => self.window.close(),
+                Event::KeyPressed { code, .. } =>
+                    if code == Key::Enter || code == Key::Escape {
+                        self.window.close();
+                    } else {
+                        self.handle_player_input(code, true);
+                    },
+                Event::KeyReleased { code, .. } =>
+                    self.handle_player_input(code, false),
+                _ => {}
+            }
+        }
+    }
+    fn update(&mut self, delta_time: &Time) {
+        let mut movement = Vector2f::new(0.0, 0.0);
+        if self.move_flags.up {
+            movement.y -= self.player_speed;
+        }
+        if self.move_flags.down {
+            movement.y += self.player_speed;
+        }
+        if self.move_flags.left {
+            movement.x -= self.player_speed;
+        }
+        if self.move_flags.right {
+            movement.x += self.player_speed;
+        }
+        self.player.move_(movement * delta_time.as_seconds());
+    }
+    fn render(&mut self) {
+        self.window.clear(Color::BLACK);
+        self.window.draw(&self.player);
+        self.window.display();
+    }
+    fn handle_player_input(&mut self, key: Key, pressed: bool) {
+        match key {
+            Key::W => self.move_flags.up = pressed,
+            Key::S => self.move_flags.down = pressed,
+            Key::A => self.move_flags.left = pressed,
+            Key::D => self.move_flags.right = pressed,
+            _ => {}
+        }
+    }
+}
+fn main() {
+    let resman = load_resources();
+    let mut game = Game::new(&resman);
+    game.run();
+}
+</file>
+===== Cargo.toml =====
+<file toml>
+[package]
+name = "first-game"
+version = "0.1.0"
+edition = "2021"
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[dependencies]
+sfml = "0.19.0"
+</file>