Add new area system.

src/map.rs

@@ -21,6 +21,10 @@ impl From<mapgen::geometry::Point> for Coordinates {
     }
 }
 
+#[derive(Clone, Debug, Default, Reflect)]
+#[reflect(Component)]
+pub struct AreaTag;
+
 #[derive(Clone, Debug, Default, Deref, DerefMut)]
 pub struct Areas(pub Vec<Area>);
 
@@ -327,6 +331,21 @@ fn add_areas(mut commands: Commands, query: Query<(Entity, &Map), (Added<Map>, W
     for (entity, map) in query.iter() {
         let mut v = vec![];
         for room in &map.rooms {
+            commands
+                .spawn_bundle(ColliderBundle {
+                    collider_type: ColliderType::Sensor,
+                    shape: ColliderShape::cuboid(
+                        (room.width() / 2) as f32,
+                        (room.height() / 2) as f32,
+                    ),
+                    flags: ActiveEvents::INTERSECTION_EVENTS.into(),
+                    ..Default::default()
+                })
+                .insert(ColliderParent {
+                    handle: entity.handle(),
+                    pos_wrt_parent: Vec2::new(room.center().x(), room.center().y()).into(),
+                })
+                .insert(AreaTag);
             v.push(Area {
                 rect: *room,
                 description: None,