Flap button in UI works! Also moved flapping to observer

src/bin/flappy/main.rs

@@ -14,6 +14,10 @@ fn main() {
             Physics2dPlugin,
         ))
         .insert_resource(Gravity(Vec2::NEG_Y * 9.8 * 100.0))
+        .init_resource::<Score>()
+        .init_resource::<RewindFrames>()
+        .init_resource::<Flaps>()
+        .init_resource::<Deaths>()
         .init_state::<PlayerState>()
         .add_systems(
             Startup,
@@ -49,7 +53,7 @@ fn main() {
                 // Systems to run in the "play" state
                 (
                     // Only flap when we press the space key
-                    flap.run_if(input_just_pressed(KeyCode::Space)),
+                    flap_kb.run_if(input_just_pressed(KeyCode::Space)),
                     // Rewinding systems
                     record.run_if(any_component_changed::<Transform>),
                 )
@@ -64,8 +68,17 @@ fn main() {
                 un_pause_game
                     .run_if(input_just_pressed(KeyCode::Space))
                     .run_if(in_state(PlayerState::Pause)),
+                // Stats that get synced to the UI
+                (
+                    sync_resource_to_ui::<Score>.run_if(resource_changed::<Score>),
+                    sync_resource_to_ui::<Flaps>.run_if(resource_changed::<Flaps>),
+                    sync_resource_to_ui::<Deaths>.run_if(resource_changed::<Deaths>),
+                    sync_resource_to_ui::<RewindFrames>.run_if(resource_changed::<RewindFrames>),
+                ),
+                scoring.run_if(on_event::<CollisionEnded>)
             ),
         )
+        .add_observer(flap)
         .run();
 }
 
@@ -124,7 +137,7 @@ fn init_bird(
 
     let tape = Tape::default();
 
-    commands.spawn((name, mesh, material, physics, t, Bird, tape));
+    commands.spawn((name, mesh, material, physics, t, Bird, tape, CollisionEventsEnabled));
 }
 
 #[derive(Component, Clone)]
@@ -133,6 +146,9 @@ struct Ground;
 #[derive(Component, Clone)]
 struct Pipe;
 
+#[derive(Component, Clone)]
+struct Hitbox;
+
 fn init_obstacles(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
@@ -170,6 +186,26 @@ fn init_obstacles(
             Pipe,
         )
     };
+    let hitbox = {
+        let material = MeshMaterial2d(materials.add(ColorMaterial {
+            color: PINK.into(),
+            ..default()
+        }));
+        let mesh = Mesh2d(meshes.add(Rectangle::new(0.1, 10.0)));
+
+        let physics = (RigidBody::Static, Collider::rectangle(1.0, 10.0));
+        let name = Name::new("hitbox");
+
+        (
+            material.clone(),
+            mesh.clone(),
+            name.clone(),
+            physics.clone(),
+            Sensor,
+            Hitbox,
+            CollisionEventsEnabled,
+        )
+    };
 
     // TODO: Instead of spawning infinite floor/pipes, we should instead spawn enough for 1-3 a few
     // screens and then "move" them around.
@@ -183,6 +219,9 @@ fn init_obstacles(
         let below = Transform::from_xyz(300.0 * i as f32, -200.0, -1.0).with_scale(Vec3::splat(100.0));
         commands.spawn((pipe.clone(), below));
 
+        let hitbox_pos = Transform::from_xyz(300.0 * i as f32, 0.0, 10.0).with_scale(Vec3::splat(100.0));
+        commands.spawn((hitbox_pos, hitbox.clone()));
+
         let floor = Transform::from_xyz(300.0 * i as f32, -300.0, 1.0).with_scale(Vec3::splat(100.0));
         commands.spawn((ground.clone(), floor));
     });
@@ -197,7 +236,14 @@ fn init_ui(mut commands: Commands) {
             ..default()
         },
         PlayerState::Stasis,
-        children![Text::new("You Died"), Text::new("Press R to Rewind"),],
+        children![
+            (Text::new("You Died"), TextLayout::new_with_justify(JustifyText::Center)),
+            (SyncResource::<Score>::default(), Text::default(), TextLayout::new_with_justify(JustifyText::Center)),
+            (SyncResource::<Flaps>::default(), Text::default(), TextLayout::new_with_justify(JustifyText::Center)),
+            (SyncResource::<RewindFrames>::default(), Text::default(), TextLayout::new_with_justify(JustifyText::Center)),
+            (SyncResource::<Deaths>::default(), Text::default(), TextLayout::new_with_justify(JustifyText::Center)),
+            (Text::new("Press R to Rewind"), TextLayout::new_with_justify(JustifyText::Center)),
+        ],
     ));
 
     fn start_game(_trigger: Trigger<Pointer<Click>>, mut next: ResMut<NextState<PlayerState>>) {
@@ -219,27 +265,50 @@ fn init_ui(mut commands: Commands) {
         ))
         .observe(start_game);
 
-    fn start_rewind(trigger: Trigger<Pointer<Pressed>>, mut next: ResMut<NextState<PlayerState>>) {
-        next.set(PlayerState::Rewind);
-    }
+    commands.spawn(
+        Node {
+            align_self: AlignSelf::End,
+            justify_self: JustifySelf::Center,
+            flex_direction: FlexDirection::Row,
+            ..default()
+        },
+    ).with_children(|parent| {
+
+        parent
+            .spawn((
+                Node {
+                    ..default()
+                },
+                Button,
+                children![Text::new("Rewind!"),],
+            ))
+            .observe(start_rewind)
+            .observe(end_rewind);
+
+        parent
+            .spawn((
+                Node {
+                    ..default()
+                },
+                Button,
+                children![Text::new("Flap!"),],
+            ))
+            .observe(flap_button);
+    });
+}
 
-    fn end_rewind(trigger: Trigger<Pointer<Released>>, mut next: ResMut<NextState<PlayerState>>) {
-        next.set(PlayerState::Alive);
-    }
+fn start_rewind(_trigger: Trigger<Pointer<Pressed>>, mut next: ResMut<NextState<PlayerState>>) {
+    next.set(PlayerState::Rewind);
+}
 
-    commands
-        .spawn((
-            Node {
-                align_self: AlignSelf::End,
-                justify_self: JustifySelf::Center,
-                flex_direction: FlexDirection::Column,
-                ..default()
-            },
-            Button,
-            children![Text::new("Rewind!"),],
-        ))
-        .observe(start_rewind)
-        .observe(end_rewind);
+fn end_rewind(_trigger: Trigger<Pointer<Released>>, mut next: ResMut<NextState<PlayerState>>) {
+    next.set(PlayerState::Alive);
+}
+
+fn flap_button(trigger: Trigger<Pointer<Pressed>>, mut commands: Commands, bird: Single<Entity, With<Bird>>) {
+    let e = *bird;
+    info!("Flapping {:?}", e);
+    commands.trigger_targets(Flap, e);
 }
 
 /// Pause the game when the player presses "Escape"
@@ -254,11 +323,29 @@ fn un_pause_game(mut next: ResMut<NextState<PlayerState>>) {
 // TODO: Create floor (and ceiling?)
 // Q: Move bird + camera or move world around bird & camera?
 // TODO: Obstacles
+#[derive(Component, Clone, Event)]
+struct Flap;
+
+// Observer for flapping
+fn flap(trigger: Trigger<Flap>,
+    mut bird: Query<&mut ExternalImpulse, With<Bird>>,
+    mut flaps: ResMut<Flaps>,
+ ) {
+    info!("real flap for {:?}", trigger.target());
+    // Increment flap stat
+    flaps.0 += 1;
+
+    // Flap birds wings
+    if let Ok(mut f) = bird.get_mut(trigger.target()) {
+        f.apply_impulse(Vec2::Y * 5000.0 + Vec2::X * 1000.0);
+    }
+}
 
-fn flap(
+fn flap_kb(
     #[cfg(debug_assertions)] state: Res<State<PlayerState>>,
     #[cfg(debug_assertions)] keycode: Res<ButtonInput<KeyCode>>,
-    mut bird: Query<(&Transform, &mut ExternalImpulse), With<Bird>>,
+    birds: Query<Entity, With<Bird>>,
+    mut commands: Commands,
 ) {
     debug_assert!(
         matches!(state.get(), PlayerState::Alive),
@@ -269,8 +356,9 @@ fn flap(
         "Only flap when space is just pressed"
     );
 
-    bird.iter_mut().for_each(|(_, mut f)| {
-        f.apply_impulse(Vec2::Y * 5000.0 + Vec2::X * 1000.0);
+    birds.iter().for_each(|e| {
+        info!("Flapping {:?}", e);
+        commands.trigger_targets(Flap, e);
     });
 }
 
@@ -309,6 +397,7 @@ fn record(
 fn rewind(
     #[cfg(debug_assertions)] state: Res<State<PlayerState>>,
     mut birds: Query<(&mut Transform, &mut AngularVelocity, &mut LinearVelocity, &mut Tape), With<Bird>>,
+    mut frames: ResMut<RewindFrames>,
 ) {
     debug_assert!(
         matches!(state.get(), PlayerState::Rewind),
@@ -316,11 +405,14 @@ fn rewind(
     );
 
     birds.iter_mut().for_each(|(mut transform, mut angular_velocity, mut linear_velocity, mut tape)| {
-        if let Some(t) = tape.translations.pop() {
-            transform.translation = t;
-        }
-        if let Some(r) = tape.rotations.pop() {
-            transform.rotation = r;
+        match (tape.translations.pop(), tape.rotations.pop()) {
+            (Some(t), Some(r)) => {
+                transform.translation = t;
+                transform.rotation = r;
+                frames.0 += 1;
+            },
+            (None, None) => (),
+            _ => panic!("Translations and rotations are out of sync!"),
         }
         // TODO: Only need to set {angular|linear}_velocity at end of Rewind
         if let Some(av) = tape.angular_velocities.pop() {
@@ -359,10 +451,18 @@ fn alive_bird(
 }
 
 fn pause_bird(
-    #[cfg(debug_assertions)] state: Res<State<PlayerState>>,
+    state: Res<State<PlayerState>>,
     mut bird: Single<&mut RigidBody, With<Bird>>,
+    mut deaths: ResMut<Deaths>,
 ) {
     debug_assert!(!matches!(state.get(), PlayerState::Alive));
+
+    // Increment death count
+    match state.get() {
+        PlayerState::Stasis => deaths.0 += 1,
+        _ => (),
+    }
+
     debug!("Setting bird to Static");
     **bird = RigidBody::Static;
 }
@@ -373,3 +473,63 @@ fn camera_follow_bird(
 ) {
     camera.translation.x = bird.translation.x;
 }
+
+/// How many pipes the player has passed
+#[derive(Resource, Default)]
+struct Score(usize);
+
+impl Display for Score {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        writeln!(f, "Score: {}", self.0)
+    }
+}
+
+/// Number of frames that were rewound
+#[derive(Resource, Default)]
+struct RewindFrames(usize);
+
+impl Display for RewindFrames {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        writeln!(f, "Frames Rewound: {}", self.0)
+    }
+}
+
+// Track number of times player flapped their wings
+#[derive(Resource, Default)]
+struct Flaps(usize);
+
+impl Display for Flaps {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        writeln!(f, "Flaps: {}", self.0)
+    }
+}
+
+// Track number of times player died
+#[derive(Resource, Default)]
+struct Deaths(usize);
+
+impl Display for Deaths {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        writeln!(f, "Deaths: {}", self.0)
+    }
+}
+
+fn scoring(
+    mut events: EventReader<CollisionEnded>,
+    state: Res<State<PlayerState>>,
+    bird: Query<Entity, With<Bird>>,
+    hitboxes: Query<Entity, With<Hitbox>>,
+    mut score: ResMut<Score>,
+) {
+    events.read().filter(|CollisionEnded(a, b)| {
+        bird.contains(*a) && hitboxes.contains(*b)
+    }).for_each(|_| {
+        info!("Hit event while {:?}", state.get());
+        match state.get() {
+            PlayerState::Alive => score.0 = score.0.saturating_add(1),
+            PlayerState::Rewind => score.0 = score.0.saturating_sub(1),
+            _ => panic!("How are you scoring at a time like this??"),
+        }
+    })
+
+}

src/physics2d.rs

@@ -20,7 +20,7 @@ fn toggle_physics_debug_render(
     let (_, config) = config_store.config_mut::<PhysicsGizmos>();
     *config = match state.get() {
         // TODO: Not all, don't want to hide mesh
-        DebuggingState::On => PhysicsGizmos::all(),
+        DebuggingState::On => PhysicsGizmos::default(),
         DebuggingState::Off => PhysicsGizmos::none(),
     };
 }