feat: new PacMan entity, entity trait implementation

src/animation.rs

@@ -0,0 +1,53 @@
+use sdl2::{
+    rect::Rect,
+    render::{Canvas, Texture},
+    video::Window,
+};
+
+pub struct AnimatedTexture<'a> {
+    raw_texture: &'a Texture<'a>,
+    current_frame: u32,
+    frame_count: u32,
+    frame_width: u32,
+    frame_height: u32,
+}
+
+impl<'a> AnimatedTexture<'a> {
+    pub fn new(
+        texture: &'a Texture<'a>,
+        frame_count: u32,
+        frame_width: u32,
+        frame_height: u32,
+    ) -> Self {
+        AnimatedTexture {
+            raw_texture: texture,
+            current_frame: 0,
+            frame_count,
+            frame_width,
+            frame_height,
+        }
+    }
+
+    fn next_frame(&mut self) {
+        self.current_frame = (self.current_frame + 1) % self.frame_count;
+    }
+
+    fn get_frame_rect(&self) -> Rect {
+        Rect::new(
+            (self.current_frame * self.frame_width) as i32,
+            0,
+            self.frame_width,
+            self.frame_height,
+        )
+    }
+
+    pub fn render(&mut self, canvas: &mut Canvas<Window>, position: (i32, i32)) {
+        let frame_rect = self.get_frame_rect();
+        let position_rect = Rect::new(position.0, position.1, self.frame_width, self.frame_height);
+        canvas
+            .copy(&self.raw_texture, frame_rect, position_rect)
+            .expect("Could not render sprite on canvas");
+
+            self.next_frame();
+    }
+}

src/direction.rs

@@ -0,0 +1,6 @@
+pub enum Direction {
+    Up,
+    Down,
+    Left,
+    Right,
+}

src/entity.rs

@@ -0,0 +1,8 @@
+pub trait Entity {
+    // Returns true if the entity is colliding with the other entity
+    fn is_colliding(&self, other: &dyn Entity) -> bool;
+    // Returns the absolute position of the entity
+    fn position(&self) -> (i32, i32);
+    // Returns the cell position of the entity (XY position within the grid)
+    fn cell_position(&self) -> (u32, u32);
+}

src/game.rs

@@ -1,11 +1,63 @@
-pub struct Game {}
+use sdl2::{pixels::Color, render::Canvas, video::Window};
 
-impl Game {
-    pub fn new() -> Game {
-        Game {}
+use crate::constants::{MapTile, BOARD, BOARD_HEIGHT, BOARD_WIDTH};
+use crate::pacman::Pacman;
+use crate::textures::TextureManager;
+
+pub struct Game<'a> {
+    pub textures: TextureManager<'a>,
+    canvas: &'a mut Canvas<Window>,
+    pacman: Pacman<'a>,
+    debug: bool,
+}
+
+impl Game<'_> {
+    pub fn new<'a>(
+        canvas: &'a mut Canvas<Window>,
+        texture_manager: TextureManager<'a>,
+    ) -> Game<'a> {
+        let pacman = Pacman::new(None, &texture_manager.pacman);
+
+        Game {
+            canvas,
+            textures: texture_manager,
+            pacman: pacman,
+            debug: true,
+        }
     }
 
-    pub fn tick() {}
+    pub fn tick(&mut self) {}
 
-    pub fn draw() {}
-}
+    pub fn draw(&mut self) {
+        // Clear the screen (black)
+        self.canvas.set_draw_color(Color::RGB(0, 0, 0));
+        self.canvas.clear();
+        
+        self.canvas
+            .copy(&self.textures.map, None, None)
+            .expect("Could not render texture on canvas");
+
+        // Draw a grid
+        for x in 0..BOARD_WIDTH {
+            for y in 0..BOARD_HEIGHT {
+                let tile = BOARD[x as usize][y as usize];
+                let color = match tile {
+                    MapTile::Empty => None,
+                    MapTile::Wall => Some(Color::BLUE),
+                    MapTile::Pellet => Some(Color::RED),
+                    MapTile::PowerPellet => Some(Color::MAGENTA),
+                    MapTile::StartingPosition(_) => Some(Color::GREEN),
+                };
+
+                if let Some(color) = color {
+                    self.canvas.set_draw_color(color);
+                    self.canvas
+                        .draw_rect(sdl2::rect::Rect::new(x as i32 * 24, y as i32 * 24, 24, 24))
+                        .expect("Could not draw rectangle");
+                }
+            }
+        }
+
+        self.canvas.present();
+    }
+}

src/pacman.rs

@@ -0,0 +1,41 @@
+use sdl2::{render::{Canvas, Texture}, video::Window};
+
+use crate::{direction::Direction, entity::Entity, animation::AnimatedTexture};
+
+pub struct Pacman<'a> {
+    // Absolute position on the board (precise)
+    pub position: (i32, i32),
+    pub direction: Direction,
+    sprite: AnimatedTexture<'a>,
+}
+
+impl Pacman<'_> {
+    pub fn new<'a>(starting_position: Option<(i32, i32)>, atlas: &'a Texture<'a>) -> Pacman<'a> {
+        Pacman {
+            position: starting_position.unwrap_or((0i32, 0i32)),
+            direction: Direction::Right,
+            sprite: AnimatedTexture::new(atlas, 2, 24, 24),
+        }
+    }
+
+    pub fn render(&mut self,  canvas: &mut Canvas<Window>) {
+        self.sprite.render(canvas, self.position);
+    }
+}
+
+impl Entity for Pacman<'_> {
+    fn is_colliding(&self, other: &dyn Entity) -> bool {
+        let (x, y) = self.position();
+        let (other_x, other_y) = other.position();
+        x == other_x && y == other_y
+    }
+
+    fn position(&self) -> (i32, i32) {
+        self.position
+    }
+
+    fn cell_position(&self) -> (u32, u32) {
+        let (x, y) = self.position();
+        (x as u32 / 24, y as u32 / 24)
+    }
+}