Small refactor of Layer.

src/main.rs

@@ -1,4 +1,3 @@
-#[deny(trivial_casts, trivial_numeric_casts)]
 extern crate sdl2;
 extern crate sdl2_image;
 
@@ -17,6 +16,7 @@ use timer::Timer;
 use game_object::GameObject;
 use player_components::{PlayerPhysicsComponent, PlayerGraphicsComponent};
 
+
 mod timer;
 mod tile;
 mod camera;
@@ -26,6 +26,7 @@ mod game_object;
 mod component;
 mod player_components;
 
+
 const SCREEN_WIDTH : u32 = 960;
 const SCREEN_HEIGHT : u32 = 640;
 
@@ -41,6 +42,7 @@ const PLAYER_ACCELERATION_X_START : f32 = 0.02;
 const PLAYER_ACCELERATION_X_STOP : f32 = 0.15;
 const PLAYER_ACCELERATION_X_CHANGE : f32 = 0.06;
 
+
 #[derive(Clone)]
 enum Tile<'a> {
     Empty,
@@ -49,6 +51,7 @@ enum Tile<'a> {
     Floor(Rect)
 }
 
+
 fn main() {
     let sdl_context = sdl2::init().unwrap();
     let video_subsystem = sdl_context.video().unwrap();
@@ -249,15 +252,11 @@ fn main() {
                                 break;
                             }
 
-                            if let Some(tile) = layer.get_tile(x, y) {
+                            d = match *layer.get_tile(x, y) {
-                                d = match *tile {
                                 Tile::Floor(_) => d.min(t),
                                 Tile::Static(_, solid) => if solid { d.min(t) } else { d },
                                 _ => d
-                                }
+                            };
-                            } else {
-                                break;
-                            }
 
                             x += 1;
                         }
@@ -285,15 +284,11 @@ fn main() {
                                 break;
                             }
 
-                            if let Some(tile) = layer.get_tile(x, y) {
+                            d = match *layer.get_tile(x, y) {
-                                d = match *tile {
                                 Tile::Floor(_) => d.max(t),
                                 Tile::Static(_, solid) => if solid { d.max(t) } else { d },
                                 _ => d
-                                }
+                            };
-                            } else {
-                                break;
-                            }
 
                             x -= 1;
                         }
@@ -323,15 +318,11 @@ fn main() {
                                 break;
                             }
 
-                            if let Some(tile) = layer.get_tile(x, y) {
+                            d = match *layer.get_tile(x, y) {
-                                d = match *tile {
                                 Tile::Floor(_) => d.min(t),
                                 Tile::Static(_, solid) => if solid { d.min(t) } else { d },
                                 _ => d
-                                }
+                            };
-                            } else {
-                                break;
-                            }
 
                             y += 1;
                         }
@@ -363,15 +354,11 @@ fn main() {
                                 break;
                             }
 
-                            if let Some(tile) = layer.get_tile(x, y) {
+                            d = match *layer.get_tile(x, y) {
-                                d = match *tile {
                                 Tile::Floor(_) => d.max(t),
                                 Tile::Static(_, solid) => if solid { d.max(t) } else { d },
                                 _ => d
-                                }
+                            };
-                            } else {
-                                break;
-                            }
 
                             y -= 1;
                         }

src/player_components.rs

@@ -7,6 +7,7 @@ use sprite::{Sprite, StaticSprite, AnimatedSprite};
 use game_object::GameObject;
 use component::{Updatable, Renderable};
 
+
 pub struct PlayerPhysicsComponent {
     pub dx: f32,
     pub dy: f32,
@@ -28,6 +29,7 @@ impl Updatable for PlayerPhysicsComponent {
     }
 }
 
+
 pub struct PlayerGraphicsComponent<'a> {
     flip_horizontal: Cell<bool>,
     sprite_standing: RefCell<StaticSprite<'a>>,

src/tile.rs

@@ -1,10 +1,9 @@
-use std::iter::repeat;
-
 use sdl2::rect::Rect;
 
 
 pub struct Layer<T> {
-    tiles: Vec<T>,
+    tiles: Vec<Option<T>>,
+    default: T,
     width: u32,
     height: u32,
     tile_width: u32,
@@ -12,9 +11,11 @@ pub struct Layer<T> {
 }
 
 impl<T> Layer<T> where T: Clone {
+    // TODO Change u32 to usize for width and height?
     pub fn new(width: u32, height: u32, tile_width: u32, tile_height: u32, tile: T) -> Layer<T> {
         Layer {
-            tiles: repeat(tile).take((width * height) as usize).collect(),
+            tiles: vec![None; (width * height) as usize],
+            default: tile,
             width: width,
             height: height,
             tile_width: tile_width,
@@ -22,20 +23,19 @@ impl<T> Layer<T> where T: Clone {
         }
     }
 
-    pub fn get_tile(&self, x: i32, y: i32) -> Option<&T> {
+    pub fn get_tile(&self, x: i32, y: i32) -> &T {
         let offset = (x + y * self.width as i32) as usize;
 
-        if offset < self.tiles.len() {
+        match *self.tiles.get(offset).unwrap() {
-            Some(&self.tiles[offset])
+            Some(ref tile) => tile,
-        } else {
+            None           => &self.default
-            None
         }
     }
 
     pub fn set_tile(&mut self, x: i32, y: i32, tile: T) {
         let offset = (x + y * self.width as i32) as usize;
 
-        self.tiles[offset] = tile;
+        self.tiles[offset] = Some(tile);
     }
 
     pub fn find_intersecting(&self, rect: &Rect) -> Option<Rect> {
@@ -61,7 +61,7 @@ impl<T> Layer<T> where T: Clone {
                 for x in intersect.x()..(intersect.x() + intersect.width() as i32) {
                     let position = Rect::new(x * self.tile_width as i32, y * self.tile_height as i32, self.tile_width, self.tile_height);
 
-                    f(self.get_tile(x, y).unwrap(), &position);
+                    f(self.get_tile(x, y), &position);
                 }
             }
         }
@@ -74,10 +74,10 @@ impl<T> Layer<T> where T: Clone {
 
 #[cfg(test)]
 mod tests {
-    use super::Layer;
-
     use sdl2::rect::Rect;
 
+    use super::*;
+
     #[test]
     fn layer_find_intersecting() {
         let layer = Layer::new(3, 3, 3, 3, ());