gun shots (#16)

src/tb_entities.rs

@@ -6,6 +6,7 @@ use bevy_trenchbroom::class::Target;
 use bevy_trenchbroom::prelude::*;
 
 use crate::cash::Cash;
+use crate::physics_layers::GameLayer;
 
 #[derive(PointClass, Component, Reflect, Default)]
 #[reflect(Component)]
@@ -150,6 +151,7 @@ impl EnemySpawn {
                 Visibility::default(),
                 RigidBody::Dynamic,
                 Collider::capsule(0.4, 2.),
+                CollisionLayers::new(LayerMask(GameLayer::Npc.to_bits()), LayerMask::ALL),
                 LockedAxes::new().lock_rotation_z().lock_rotation_x(),
             ))
             .with_children(|parent| {