Throw projectile (#19)

src/abilities/mod.rs

@@ -0,0 +1,49 @@
+mod gun;
+mod thrown;
+
+use crate::{GameState, npc::Hit, tb_entities::EnemySpawn};
+use avian3d::prelude::*;
+use bevy::prelude::*;
+
+#[derive(Component)]
+pub struct Projectile {
+    pub damage: u32,
+}
+
+#[derive(Event, Reflect)]
+pub enum TriggerState {
+    Active,
+    Inactive,
+}
+
+pub fn plugin(app: &mut App) {
+    app.add_plugins(gun::plugin);
+    app.add_plugins(thrown::plugin);
+
+    app.add_systems(Update, enemy_hit.run_if(in_state(GameState::Playing)));
+}
+
+fn enemy_hit(
+    mut commands: Commands,
+    mut collision_event_reader: EventReader<CollisionStarted>,
+    query_shot: Query<&Projectile>,
+    query_npc: Query<&EnemySpawn>,
+) {
+    for CollisionStarted(e1, e2) in collision_event_reader.read() {
+        if !query_shot.contains(*e1) && !query_shot.contains(*e2) {
+            continue;
+        }
+        if !query_npc.contains(*e1) && !query_npc.contains(*e2) {
+            continue;
+        }
+
+        let (enemy_entity, projectile) = if query_npc.contains(*e1) {
+            (*e1, query_shot.get(*e2))
+        } else {
+            (*e2, query_shot.get(*e1))
+        };
+
+        let damage = projectile.map(|p| p.damage).unwrap_or_default();
+        commands.entity(enemy_entity).trigger(Hit { damage });
+    }
+}