Render colored boxes and spots

src/components.rs

@@ -1,4 +1,6 @@
 use specs::{Component, NullStorage, VecStorage, World, WorldExt};
+use std::fmt;
+use std::fmt::Display;
 
 pub enum BoxColor {
     Red,
@@ -7,7 +9,12 @@ pub enum BoxColor {
 
 impl Display for BoxColor {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        fmt.write_str(match self {
+            BoxColor::Red => "red",
+            BoxColor::Blue => "blue",
+        })?;
 
+        Ok(())
     }
 }
 

src/entities.rs

@@ -1,12 +1,19 @@
 use crate::components::*;
-use specs::{Builder, World, WorldExt, EntityBuilder};
+use specs::{Builder, EntityBuilder, World, WorldExt};
 
 /// Cut down on the common syntax boilerplate
-fn common_entity<'w>(world: &'w mut World, position: Position, z: u8,  sprite_path: &str) -> EntityBuilder<'w> {
+fn common_entity<'w>(
+    world: &'w mut World,
+    position: Position,
+    z: u8,
+    sprite_path: &str,
+) -> EntityBuilder<'w> {
     return world
         .create_entity()
         .with(position.with_z(z))
-        .with(Renderable { path: sprite_path.to_string() });
+        .with(Renderable {
+            path: sprite_path.to_string(),
+        });
 }
 
 pub fn create_wall(world: &mut World, position: Position) {
@@ -20,16 +27,18 @@ pub fn create_floor(world: &mut World, position: Position) {
     common_entity(world, position, 5, "/images/floor.png").build();
 }
 
-pub fn create_box(world: &mut World, position: Position) {
-    common_entity(world, position, 10, "/images/box.png")
-        .with(Box {})
+pub fn create_box(world: &mut World, position: Position, color: BoxColor) {
+    let path = format!("/images/box_{}.png", color);
+    common_entity(world, position, 10, &path)
+        .with(Box { color })
         .with(Movable)
         .build();
 }
 
-pub fn create_box_spot(world: &mut World, position: Position) {
-    common_entity(world, position, 9, "/images/box_spot.png")
-        .with(BoxSpot {})
+pub fn create_box_spot(world: &mut World, position: Position, color: BoxColor) {
+    let path = format!("/images/box_spot_{}.png", color);
+    common_entity(world, position, 9, &path)
+        .with(BoxSpot { color })
         .build();
 }
 

src/main.rs

@@ -65,11 +65,11 @@ pub fn initialize_level(world: &mut World) {
     const MAP: &str = "
     N N W W W W W W
     W W W . . . . W
-    W . . . B . . W
-    W . . . . . . W
-    W . P . . B . W
-    W . . . . . . W
-    W . . S . S . W
+    W . . . BB . . W
+    W . . RB . . . W
+    W . P . . . . W
+    W . . . . RS . W
+    W . . BS . . . W
     W . . . . . . W
     W W W W W W W W
     ";

src/map.rs

@@ -1,4 +1,4 @@
-use crate::components::Position;
+use crate::components::{BoxColor, Position};
 use crate::entities::*;
 use specs::World;
 
@@ -24,13 +24,21 @@ pub fn load_map(world: &mut World, map_string: String) {
                     create_floor(world, position);
                     create_player(world, position);
                 }
-                "B" => {
+                "BB" => {
                     create_floor(world, position);
-                    create_box(world, position);
+                    create_box(world, position, BoxColor::Blue);
                 }
-                "S" => {
+                "RB" => {
                     create_floor(world, position);
-                    create_box_spot(world, position);
+                    create_box(world, position, BoxColor::Red);
+                }
+                "BS" => {
+                    create_floor(world, position);
+                    create_box_spot(world, position, BoxColor::Blue);
+                }
+                "RS" => {
+                    create_floor(world, position);
+                    create_box_spot(world, position, BoxColor::Red);
                 }
                 "N" => (),
                 c => panic!("unrecognized map item {}", c),