Add background and variable damage

src/main.rs

@@ -39,6 +39,20 @@ fn setup(mut commands: Commands, assets: Res<AssetServer>) {
     // cameras
     commands.spawn_bundle(OrthographicCameraBundle::new_2d());
     commands.spawn_bundle(UiCameraBundle::default());
+    // background
+
+    for x in -20..20 {
+        for y in -20..20 {
+            commands.spawn_bundle(SpriteBundle {
+                texture: assets.load("grass.png"),
+                transform: Transform {
+                    translation: Vec3::new(x as f32 * 128.0, y as f32 * 128.0, 0.0),
+                    ..Default::default()
+                },
+                ..Default::default()
+            });
+        }
+    }
     // arnold himself
     commands
         .spawn_bundle(SpriteBundle {
@@ -47,13 +61,13 @@ fn setup(mut commands: Commands, assets: Res<AssetServer>) {
         })
         .insert(Arnold::new())
         .insert(Transform {
-            translation: Vec3::new(0.0, 0.0, 0.0),
+            translation: Vec3::new(0.0, 0.0, 10.0),
             ..Default::default()
         });
     // enemy spawner
     commands
         .spawn()
-        .insert(EnemySpawner::new(Timer::from_seconds(3.0, true)));
+        .insert(EnemySpawner::new(Timer::from_seconds(1.5, true)));
     // scoreboard
     commands
         .spawn_bundle(TextBundle {
@@ -146,6 +160,8 @@ fn projectile_collide_system(
     projectile_query: Query<(&Projectile, &Transform)>,
     mut target_query: Query<(Entity, &mut Hitpoints, &Transform)>,
 ) {
+    let mut rng = rand::thread_rng();
+
     for (entity, mut hp, target_transform) in target_query.iter_mut() {
         for (projectile, projectile_transform) in projectile_query.iter() {
             if target_transform
@@ -153,8 +169,10 @@ fn projectile_collide_system(
                 .distance(projectile_transform.translation)
                 < 32.0
             {
-                hp.hp -= projectile.damage;
+                let damage_variable = projectile.damage / 5;
-                stats.damage_dealt += projectile.damage;
+                let actual_damage = projectile.damage - damage_variable / 2 + rng.gen_range(0..damage_variable + 1);
+                hp.hp -= actual_damage;
+                stats.damage_dealt += actual_damage;
 
                 let font = assets.load("fonts/PressStart2P-Regular.ttf");
                 let text_style = TextStyle {
@@ -169,7 +187,7 @@ fn projectile_collide_system(
                 commands
                     .spawn_bundle(Text2dBundle {
                         text: Text::with_section(
-                            &format!("{}", projectile.damage),
+                            &format!("{}", actual_damage),
                             text_style,
                             text_alignment,
                         ),
@@ -361,7 +379,7 @@ fn enemy_spawner_system(
             },
             ..Default::default()
         })
-        .insert(FollowArnold::new(1.0))
+        .insert(FollowArnold::new(0.8))
         .insert(Hitpoints::new(8));
 }