melting platform, level 4

src/game.rs

@@ -98,6 +98,9 @@ pub struct Player;
 #[derive(Component)]
 pub struct CollisionCount(usize);
 
+#[derive(Component)]
+pub struct Melty(pub Color);
+
 // Systems
 
 fn setup(
@@ -217,6 +220,39 @@ pub fn spawn_platform(
 		.insert(Level);
 }
 
+pub fn spawn_melty_platform(
+	commands: &mut Commands,
+	meshes: &mut ResMut<Assets<Mesh>>,
+	materials: &mut ResMut<Assets<ColorMaterial>>,
+	asset_server: &Res<AssetServer>,
+
+	transform: Transform,
+	color: Color,
+) {
+	commands
+		.spawn_bundle(ColorMesh2dBundle {
+			mesh: meshes
+				.add(Mesh::from(Quad {
+					size: Vec2 { x: 96., y: 16. },
+					flip: false,
+				}))
+				.into(),
+			material: materials.add(ColorMaterial::from(color)),
+			transform,
+			..default()
+		})
+		.insert(Collider::cuboid(48., 8.))
+		.insert(Melty(color))
+		.insert(Level)
+		.with_children(|c| {
+			c.spawn_bundle(SpriteBundle {
+				texture: asset_server.get_handle("melty.png"),
+				transform: Transform::from_xyz(0., 0., 0.5),
+				..default()
+			});
+		});
+}
+
 fn collision_event_system(
 	mut commands: Commands,
 	character_meshes: Res<CharacterMeshes>,
@@ -229,6 +265,7 @@ fn collision_event_system(
 		Option<&Player>,
 	)>,
 	pass_through_filter_query: Query<&PassThroughFilter>,
+	melty_query: Query<&Melty>,
 	mut collision_counter_query: Query<&mut CollisionCount>,
 	mut app_state: ResMut<State<AppState>>,
 	audio: Res<crossbeam_channel::Sender<AudioMsg>>,
@@ -250,7 +287,7 @@ fn collision_event_system(
 
 						// If color approximately white
 						if app_state.current() == &AppState::Game
-							&& 4. - new_color.length_squared() < 0.1
+							&& Vec4::from(new_color).min_element() >= 0.9
 						{
 							app_state.replace(AppState::Win).ok();
 						}
@@ -275,6 +312,18 @@ fn collision_event_system(
 						);
 
 						audio.send(AudioMsg::Fusion).ok();
+					} else if let (Ok((c_color, _c_transform, _c_material, _c_player)), Ok(melty)) =
+						(character_query.get_mut(*e1), melty_query.get(*e2))
+					{
+						if (Vec4::from(melty.0) - Vec4::from(c_color.0)).max_element() <= 0. {
+							commands.entity(*e2).despawn_recursive();
+						}
+					} else if let (Ok((c_color, _c_transform, _c_material, _c_player)), Ok(melty)) =
+						(character_query.get_mut(*e2), melty_query.get(*e1))
+					{
+						if (Vec4::from(melty.0) - Vec4::from(c_color.0)).max_element() <= 0. {
+							commands.entity(*e1).despawn_recursive();
+						}
 					}
 				} else if *flags == CollisionEventFlags::SENSOR {
 					if let (Ok((mut c_color, _c_transform, mut c_material, c_player)), Ok(filter)) = (
@@ -292,6 +341,7 @@ fn collision_event_system(
 									c_color.0.b(),
 								]))
 								.ok();
+							audio.send(AudioMsg::Switch).ok();
 						}
 					} else if let (
 						Ok((mut c_color, _c_transform, mut c_material, c_player)),
@@ -311,6 +361,7 @@ fn collision_event_system(
 									c_color.0.b(),
 								]))
 								.ok();
+							audio.send(AudioMsg::Switch).ok();
 						}
 					} else if let (Ok(mut collision_count), Err(_)) = (
 						collision_counter_query.get_mut(*e1),