remove alpha channel

TODO.md

@@ -2,6 +2,12 @@
 
 ## game data structure
 
+### colours
+
+convert colours to hex
+* accept abcdef, #abcdef, 0xabcdef (inc. uppercase)
+* export as #abcdef
+
 ### parser
 
 * ~move tests into their respective modules where appropriate~

src/colour.rs

@@ -5,7 +5,6 @@ pub struct Colour {
     pub red: u8,
     pub green: u8,
     pub blue: u8,
-    pub alpha: u8,
 }
 
 impl Colour {
@@ -15,12 +14,11 @@ impl Colour {
             red:   *colours.get(0).unwrap_or(&ZERO),
             green: *colours.get(1).unwrap_or(&ZERO),
             blue:  *colours.get(2).unwrap_or(&ZERO),
-            alpha: *colours.get(3).unwrap_or(&255),
         }
     }
 
     pub fn to_vec(&self) -> Vec<u8> {
-        vec![self.red, self.green, self.blue, self.alpha]
+        vec![self.red, self.green, self.blue]
     }
 }
 
@@ -30,15 +28,15 @@ mod test {
 
     #[test]
     fn test_colour_from_intermediate() {
-        let output = Colour::from(vec![64, 128, 192, 255]);
-        let expected = Colour { red: 64, green: 128, blue: 192, alpha: 255 };
+        let output = Colour::from(vec![64, 128, 192]);
+        let expected = Colour { red: 64, green: 128, blue: 192 };
         assert_eq!(output, expected);
     }
 
     #[test]
     fn test_colour_to_intermediate() {
-        let output = Colour { red: 64, green: 128, blue: 192, alpha: 255 }.to_vec();
-        let expected = vec![64, 128, 192, 255];
+        let output = Colour { red: 64, green: 128, blue: 192 }.to_vec();
+        let expected = vec![64, 128, 192];
         assert_eq!(output, expected);
     }
 }

src/mock.rs

@@ -84,10 +84,10 @@ pub(crate) mod palette {
         Palette {
             name: "blueprint".to_string(),
             colours: vec![
-                Colour { red: 0, green: 0, blue: 0, alpha: 0 },
-                Colour { red: 0, green: 81, blue: 104, alpha: 255 },
-                Colour { red: 118, green: 159, blue: 155, alpha: 255 },
-                Colour { red: 155, green: 155, blue: 155, alpha: 255 },
+                Colour { red: 0,   green: 0,   blue: 0   },
+                Colour { red: 0,   green: 81,  blue: 104 },
+                Colour { red: 118, green: 159, blue: 155 },
+                Colour { red: 155, green: 155, blue: 155 },
             ],
         }
     }