Add function documentation

src/game/runtime.rs

@@ -6,6 +6,7 @@ use bevy::{
 
 use super::objects::Player;
 
+/// Move the player character based on the keyboard input
 pub fn move_player(
     time: Res<Time>,
     keyboard_input: Res<ButtonInput<KeyCode>>,
@@ -31,10 +32,12 @@ pub fn move_player(
     Ok(())
 }
 
+/// Neatly exit game
 pub fn quit(mut exit: EventWriter<AppExit>) {
     exit.write(AppExit::Success);
 }
 
+/// Follow the player character with the camera
 pub fn move_camera(
     mut camera: Single<&mut Transform, (Without<Player>, With<IsDefaultUiCamera>)>,
     player: Single<&Transform, (With<Player>, Without<IsDefaultUiCamera>)>,
@@ -42,6 +45,7 @@ pub fn move_camera(
     camera.translation = camera.translation.lerp(player.translation, 0.05);
 }
 
+/// Adjust the camera zoom based on the scroll wheel input
 pub fn zoom_camera(
     mut camera: Single<&mut Projection, With<IsDefaultUiCamera>>,
     scroll: Res<AccumulatedMouseScroll>,