Projectile damage

src/projectile.rs

@@ -0,0 +1,44 @@
+use bevy::prelude::*;
+
+use crate::{
+    collision::{Collided, Collider},
+    damagable::Damagable,
+};
+
+#[derive(Component)]
+pub struct Projectile {
+    damage: u32,
+}
+
+impl Projectile {
+    pub fn new(damage: u32) -> Projectile {
+        Projectile { damage }
+    }
+}
+
+pub fn spawn_projectile(commands: &mut Commands, sprite: Handle<Image>, damage: u32) {
+    commands
+        .spawn((
+            Projectile::new(damage),
+            Sprite::from(sprite),
+            Collider::new(8.),
+            Transform::from_xyz(0., 0., 0.),
+        ))
+        .observe(observe_collision);
+}
+pub fn observe_collision(
+    collision: On<Collided>,
+    mut commands: Commands,
+    projectile_query: Query<&Projectile>,
+    mut collision_query: Query<&mut Damagable>,
+) {
+    let Ok(projectile) = projectile_query.get(collision.entity) else {
+        return;
+    };
+    let Ok(mut collided) = collision_query.get_mut(collision.with) else {
+        return;
+    };
+
+    collided.damage(projectile.damage);
+    commands.get_entity(collision.entity).unwrap().despawn();
+}