feat: speed property to PacMan

src/animation.rs

@@ -0,0 +1,90 @@
+use sdl2::{
+    rect::Rect,
+    render::{Canvas, Texture},
+    video::Window,
+};
+
+use crate::direction::Direction;
+
+pub struct AnimatedTexture<'a> {
+    raw_texture: Texture<'a>,
+    ticker: u32,
+    reversed: bool,
+    ticks_per_frame: u32,
+    frame_count: u32,
+    frame_width: u32,
+    frame_height: u32,
+}
+
+impl<'a> AnimatedTexture<'a> {
+    pub fn new(
+        texture: Texture<'a>,
+        ticks_per_frame: u32,
+        frame_count: u32,
+        frame_width: u32,
+        frame_height: u32,
+    ) -> Self {
+        AnimatedTexture {
+            raw_texture: texture,
+            ticker: 0,
+            reversed: false,
+            ticks_per_frame,
+            frame_count,
+            frame_width,
+            frame_height,
+        }
+    }
+
+    fn current_frame(&self) -> u32 {
+        self.ticker / self.ticks_per_frame
+    }
+
+    fn next_frame(&mut self) {
+        if self.reversed {
+            self.ticker -= 1;
+
+            if self.ticker == 0 {
+                self.reversed = !self.reversed;
+            }
+        } else {
+            self.ticker += 1;
+
+            if self.ticker + 1 == self.ticks_per_frame * self.frame_count {
+                self.reversed = !self.reversed;
+            }
+        }
+    }
+
+    fn get_frame_rect(&self) -> Rect {
+        Rect::new(
+            self.current_frame() as i32 * self.frame_width as i32,
+            0,
+            self.frame_width,
+            self.frame_height,
+        )
+    }
+
+    pub fn render(
+        &mut self,
+        canvas: &mut Canvas<Window>,
+        position: (i32, i32),
+        direction: Direction,
+    ) {
+        let frame_rect = self.get_frame_rect();
+        let position_rect = Rect::new(position.0, position.1, self.frame_width, self.frame_height);
+
+        canvas
+            .copy_ex(
+                &self.raw_texture,
+                Some(frame_rect),
+                Some(position_rect),
+                direction.angle(),
+                None,
+                false,
+                false,
+            )
+            .expect("Could not render texture on canvas");
+
+        self.next_frame();
+    }
+}

src/direction.rs

@@ -1,6 +1,18 @@
+#[derive(Debug, Copy, Clone, PartialEq)]
 pub enum Direction {
     Up,
     Down,
     Left,
     Right,
+}
+
+impl Direction {
+    pub fn angle(&self) -> f64 {
+        match self {
+            Direction::Right => 0f64,
+            Direction::Down => 90f64,
+            Direction::Left => 180f64,
+            Direction::Up => 270f64,
+        }
+    }
 }

src/entity.rs

@@ -5,4 +5,6 @@ pub trait Entity {
     fn position(&self) -> (i32, i32);
     // Returns the cell position of the entity (XY position within the grid)
     fn cell_position(&self) -> (u32, u32);
+    // Tick the entity (move it, perform collision checks, etc) 
+    fn tick(&mut self);
 }

src/game.rs

@@ -1,12 +1,17 @@
+use sdl2::image::LoadTexture;
+use sdl2::keyboard::Keycode;
+use sdl2::render::{TextureCreator, Texture};
+use sdl2::video::WindowContext;
 use sdl2::{pixels::Color, render::Canvas, video::Window};
 
 use crate::constants::{MapTile, BOARD, BOARD_HEIGHT, BOARD_WIDTH};
-use crate::pacman::Pacman;
-use crate::textures::TextureManager;
+use crate::direction::Direction;
+use crate::entity::Entity;
+use crate::pacman::{Pacman};
 
 pub struct Game<'a> {
-    pub textures: TextureManager<'a>,
     canvas: &'a mut Canvas<Window>,
+    map_texture: Texture<'a>,
     pacman: Pacman<'a>,
     debug: bool,
 }
@@ -14,19 +19,47 @@ pub struct Game<'a> {
 impl Game<'_> {
     pub fn new<'a>(
         canvas: &'a mut Canvas<Window>,
-        texture_manager: TextureManager<'a>,
+        texture_creator: &'a TextureCreator<WindowContext>,
     ) -> Game<'a> {
-        let pacman = Pacman::new(None, &texture_manager.pacman);
+        let pacman_atlas = texture_creator
+            .load_texture("assets/32/pacman.png")
+            .expect("Could not load pacman texture");
+        let pacman = Pacman::new(None, pacman_atlas);
 
         Game {
             canvas,
-            textures: texture_manager,
             pacman: pacman,
             debug: true,
+            map_texture: texture_creator
+                .load_texture("assets/map.png")
+                .expect("Could not load pacman texture"),
         }
     }
 
-    pub fn tick(&mut self) {}
+    pub fn keyboard_event(&mut self, keycode: Keycode) {
+        match keycode {
+            Keycode::D => {
+                self.pacman.direction = Direction::Right;
+            }
+            Keycode::A => {
+                self.pacman.direction = Direction::Left;
+            }
+            Keycode::W => {
+                self.pacman.direction = Direction::Up;
+            }
+            Keycode::S => {
+                self.pacman.direction = Direction::Down;
+            }
+            Keycode::Space => {
+                self.debug = !self.debug;
+            }
+            _ => {}
+        }
+    }
+
+    pub fn tick(&mut self) {
+        self.pacman.tick();
+    }
 
     pub fn draw(&mut self) {
         // Clear the screen (black)
@@ -34,9 +67,12 @@ impl Game<'_> {
         self.canvas.clear();
         
         self.canvas
-            .copy(&self.textures.map, None, None)
+            .copy(&self.map_texture, None, None)
             .expect("Could not render texture on canvas");
 
+        // Render the pacman
+        self.pacman.render(self.canvas);
+
         // Draw a grid
         for x in 0..BOARD_WIDTH {
             for y in 0..BOARD_HEIGHT {

src/main.rs

@@ -46,7 +46,7 @@ pub fn main() {
         .expect("Could not set logical size");
 
     let texture_creator = canvas.texture_creator();
-    let mut game = Game::new(&mut canvas, TextureManager::new(&texture_creator));
+    let mut game = Game::new(&mut canvas, &texture_creator);
 
     let mut event_pump = sdl_context
         .event_pump()
@@ -55,7 +55,11 @@ pub fn main() {
     game.draw();
     game.tick();
 
+    let loop_time = Duration::from_millis(1000 / 60);
+
     let mut main_loop = || {
+        let start = Instant::now();
+
         for event in event_pump.poll_iter() {
             match event {
                 // Handle quitting keys or window close
@@ -64,9 +68,9 @@ pub fn main() {
                     keycode: Some(Keycode::Escape) | Some(Keycode::Q),
                     ..
                 } => return false,
-                event @ Event::KeyDown { .. } => {
-                    println!("{:?}", event);
-                }
+                Event::KeyDown { keycode , .. } => {
+                    game.keyboard_event(keycode.unwrap());
+                },
                 _ => {}
             }
         }
@@ -83,15 +87,12 @@ pub fn main() {
             start.elapsed()
         };
 
-        // Alert if tick time exceeds 10ms
-        if tick_time > Duration::from_millis(3) {
-            println!("Tick took: {:?}", tick_time);
-        }
-        if draw_time > Duration::from_millis(3) {
-            println!("Draw took: {:?}", draw_time);
+        if start.elapsed() < loop_time {
+            ::std::thread::sleep(loop_time - start.elapsed());
+        } else {
+            println!("Game loop behind schedule by: {:?}", start.elapsed() - loop_time);
         }
 
-        ::std::thread::sleep(Duration::from_millis(10));
         true
     };
 

src/pacman.rs

@@ -0,0 +1,64 @@
+use sdl2::{
+    render::{Canvas, Texture},
+    video::Window,
+};
+
+use crate::{animation::AnimatedTexture, direction::Direction, entity::Entity};
+
+pub struct Pacman<'a> {
+    // Absolute position on the board (precise)
+    pub position: (i32, i32),
+    pub direction: Direction,
+    speed: u32,
+    sprite: AnimatedTexture<'a>,
+}
+
+impl Pacman<'_> {
+    pub fn new<'a>(starting_position: Option<(i32, i32)>, atlas: Texture<'a>) -> Pacman<'a> {
+        Pacman {
+            position: starting_position.unwrap_or((0i32, 0i32)),
+            direction: Direction::Right,
+            speed: 2,
+            sprite: AnimatedTexture::new(atlas, 4, 3, 32, 32),
+        }
+    }
+
+    pub fn render(&mut self, canvas: &mut Canvas<Window>) {
+        self.sprite.render(canvas, self.position, self.direction);
+    }
+}
+
+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)
+    }
+
+    fn tick(&mut self) {
+        let speed = self.speed as i32;
+        match self.direction {
+            Direction::Right => {
+                self.position.0 += speed;
+            }
+            Direction::Left => {
+                self.position.0 -= speed;
+            }
+            Direction::Up => {
+                self.position.1 -= speed;
+            }
+            Direction::Down => {
+                self.position.1 += speed;
+            }
+        }
+    }
+}