Sync head orientation, add simple player visuals

client/src/assets/block.rs

@@ -2,8 +2,8 @@ use bevy::prelude::*;
 use common::prelude::*;
 
 pub fn plugin(app: &mut App) {
-    app.add_observer(insert_block_visuals);
     app.load_resource::<BlockAssets>();
+    app.add_observer(insert_block_visuals);
 }
 
 #[derive(Resource, Asset, Reflect, Clone)]
@@ -25,14 +25,13 @@ impl FromWorld for BlockAssets {
     }
 }
 
-/// Observer which automatically inserts block visuals (mesh and
-/// material) when an entity has the `Block` component added to it.
 fn insert_block_visuals(
-    add: On<Add, Block>,
+    event: On<Add, Block>,
     mut commands: Commands,
     block_assets: Res<BlockAssets>,
 ) {
-    commands.entity(add.entity).insert((
+    let block = event.entity;
+    commands.entity(block).insert((
         Mesh3d(block_assets.mesh.clone()),
         MeshMaterial3d(block_assets.material.clone()),
     ));

client/src/assets/mod.rs

@@ -0,0 +1,15 @@
+//! Common module to handle asset loading and adding visual components
+//! (such as [`Mesh`]) to entities when they are spawned from the server.
+//!
+//! This doesn't mean this is the only place assets are loaded.
+//! For example UI related assets may be loaded in `ui` plugins.
+
+use bevy::prelude::*;
+
+mod block;
+mod player;
+
+pub fn plugin(app: &mut App) {
+    app.add_plugins(block::plugin);
+    app.add_plugins(player::plugin);
+}

client/src/assets/player.rs

@@ -0,0 +1,38 @@
+use bevy::prelude::*;
+use common::prelude::*;
+
+pub fn plugin(app: &mut App) {
+    app.load_resource::<PlayerAssets>();
+    app.add_observer(insert_player_visuals);
+}
+
+#[derive(Resource, Asset, Reflect, Clone)]
+#[reflect(Resource)]
+pub struct PlayerAssets {
+    #[dependency]
+    mesh: Handle<Mesh>,
+    #[dependency]
+    material: Handle<StandardMaterial>,
+}
+
+impl FromWorld for PlayerAssets {
+    fn from_world(world: &mut World) -> Self {
+        let assets = world.resource::<AssetServer>();
+        Self {
+            mesh: assets.add(Cuboid::new(1.0, 1.0, 1.0).into()),
+            material: assets.add(Color::srgb_u8(124, 255, 144).into()),
+        }
+    }
+}
+
+fn insert_player_visuals(
+    event: On<Add, Player>,
+    mut commands: Commands,
+    block_assets: Res<PlayerAssets>,
+) {
+    let player = event.entity;
+    commands.entity(player).insert((
+        Mesh3d(block_assets.mesh.clone()),
+        MeshMaterial3d(block_assets.material.clone()),
+    ));
+}

client/src/camera.rs

@@ -1,148 +0,0 @@
-use std::f32::consts::TAU;
-
-use bevy::prelude::*;
-
-use bevy::input::mouse::AccumulatedMouseMotion;
-use bevy::window::{CursorGrabMode, CursorOptions};
-
-pub fn cursor_grab(
-    mut mouse_button_input: ResMut<ButtonInput<MouseButton>>,
-    key_input: Res<ButtonInput<KeyCode>>,
-    window: Single<(&mut Window, &mut CursorOptions)>,
-) {
-    let (mut window, mut cursor) = window.into_inner();
-
-    let is_grabbed = cursor.grab_mode != CursorGrabMode::None;
-    let request_grab = mouse_button_input.any_just_pressed([MouseButton::Left, MouseButton::Right]);
-    let request_ungrab = !window.focused || key_input.just_pressed(KeyCode::Escape);
-
-    if !is_grabbed && request_grab && !request_ungrab {
-        cursor.grab_mode = CursorGrabMode::Locked;
-
-        // To prevent other systems (such as `place_break_blocks`)
-        // from seeing the mouse button inputs, clear the state here.
-        mouse_button_input.clear();
-    }
-
-    if is_grabbed && request_ungrab && !request_grab {
-        cursor.grab_mode = CursorGrabMode::None;
-    }
-
-    if is_grabbed && !request_ungrab {
-        // Set the cursor position to the center of the window, so that when
-        // it is ungrabbed, it will reappear there. Because `is_grabbed` is
-        // not updated on grab, this block is delayed by one frame.
-        //
-        // On Wayland, since the cursor is locked into place, this only needs
-        // to be done once. Unfortunately, for some reason this doesn't work
-        // in the same frame as setting `grab_mode`, and would log an error.
-        //
-        // On X11, the cursor can't be locked into place, only confined to the
-        // window bounds, so we repeatedly move the cursor back to the center
-        // while it's grabbed.
-        //
-        // On the web, the cursor can be locked, but setting its position is
-        // not supported at all, so this would instead log a bunch of errors.
-        let center = window.resolution.size() / 2.;
-        #[cfg(not(target_family = "wasm"))] // skip on web
-        window.set_cursor_position(Some(center));
-    }
-
-    // Keep cursor visbility in sync with `grab_mode`.
-    cursor.visible = cursor.grab_mode == CursorGrabMode::None;
-}
-
-pub fn is_cursor_grabbed(cursor: Single<&CursorOptions>) -> bool {
-    cursor.grab_mode != CursorGrabMode::None
-}
-
-#[derive(Component, Debug)]
-pub struct CameraFreeLook {
-    /// The mouse sensitivity, in radians per pixel.
-    pub sensitivity: Vec2,
-    /// How far the camera can be tilted up and down.
-    pub pitch_limit: std::ops::RangeInclusive<f32>,
-
-    /// Upon initialization, `pitch` and `yaw` will
-    /// be set from the camera transform's rotation.
-    initialized: bool,
-    /// The current yaw (right/left) of the camera, in radians.
-    pub yaw: f32,
-    /// The current pitch (tilt) of the camera, in radians.
-    pub pitch: f32,
-}
-
-impl Default for CameraFreeLook {
-    fn default() -> Self {
-        Self {
-            sensitivity: Vec2::splat(0.2).map(f32::to_radians),
-            pitch_limit: -(TAU / 4.0)..=(TAU / 4.0),
-            initialized: false,
-            yaw: 0.0,
-            pitch: 0.0,
-        }
-    }
-}
-
-pub fn camera_look(
-    accumulated_mouse_motion: Res<AccumulatedMouseMotion>,
-    camera: Single<(&mut Transform, &mut CameraFreeLook)>,
-) {
-    let (mut transform, mut look) = camera.into_inner();
-
-    // Ensure the yaw and pitch are initialized once
-    // from the camera transform's current rotation.
-    if !look.initialized {
-        (look.yaw, look.pitch, _) = transform.rotation.to_euler(EulerRot::YXZ);
-        look.initialized = true;
-    }
-
-    // Update the current camera state's internal yaw and pitch.
-    let motion = accumulated_mouse_motion.delta * look.sensitivity;
-    let (min, max) = look.pitch_limit.clone().into_inner();
-    look.yaw = (look.yaw - motion.x).rem_euclid(TAU); // keep within 0°..360°
-    look.pitch = (look.pitch - motion.y).clamp(min, max);
-
-    // Override the camera transform's rotation.
-    transform.rotation = Quat::from_euler(EulerRot::ZYX, 0.0, look.yaw, look.pitch);
-}
-
-#[derive(Component)]
-pub struct Crosshair;
-
-pub fn setup_crosshair(mut commands: Commands, assets: Res<AssetServer>) {
-    commands.spawn((
-        Node {
-            width: percent(100),
-            height: percent(100),
-            align_items: AlignItems::Center,
-            justify_content: JustifyContent::Center,
-            ..default()
-        },
-        children![(
-            Crosshair,
-            Node {
-                width: px(64),
-                height: px(64),
-                ..default()
-            },
-            ImageNode {
-                image: assets.load("crosshair.png"),
-                ..default()
-            },
-            // Hidden by default, because cursor shouldn't be grabbed at startup either.
-            Visibility::Hidden,
-        )],
-    ));
-}
-
-pub fn update_crosshair_visibility(
-    cursor: Single<&CursorOptions, Changed<CursorOptions>>,
-    crosshair: Single<&mut Visibility, With<Crosshair>>,
-) {
-    let is_grabbed = cursor.grab_mode != CursorGrabMode::None;
-    let mut crosshair_visibility = crosshair.into_inner();
-    *crosshair_visibility = (!is_grabbed || cursor.visible)
-        .then_some(Visibility::Hidden)
-        .unwrap_or_default();
-}

client/src/input.rs

@@ -1,41 +0,0 @@
-use bevy::prelude::*;
-use lightyear::prelude::input::client::*;
-use lightyear::prelude::input::native::*;
-
-use bevy::window::{CursorGrabMode, CursorOptions};
-
-use crate::camera::CameraFreeLook;
-use common::network::Inputs;
-
-pub fn plugin(app: &mut App) {
-    app.add_systems(
-        FixedPreUpdate,
-        buffer_input.in_set(InputSystems::WriteClientInputs),
-    );
-}
-
-fn buffer_input(
-    key_input: Res<ButtonInput<KeyCode>>,
-    mut action_state: Single<&mut ActionState<Inputs>, With<InputMarker<Inputs>>>,
-    cursor: Single<&CursorOptions>,
-    camera: Single<&CameraFreeLook>,
-) {
-    action_state.0 = if cursor.grab_mode == CursorGrabMode::None {
-        // If cursor is not grabbed, reset movement input.
-        Default::default()
-    } else {
-        Inputs {
-            #[rustfmt::skip]
-            movement: {
-                let mut movement = Vec2::ZERO;
-                if key_input.pressed(KeyCode::KeyD) { movement.x += 1.0; }
-                if key_input.pressed(KeyCode::KeyA) { movement.x -= 1.0; }
-                if key_input.pressed(KeyCode::KeyS) { movement.y += 1.0; }
-                if key_input.pressed(KeyCode::KeyW) { movement.y -= 1.0; }
-                Rot2::radians(-camera.yaw) * movement.clamp_length_max(1.0)
-            },
-            up: key_input.pressed(KeyCode::Space),
-            down: key_input.pressed(KeyCode::ShiftLeft),
-        }
-    };
-}

client/src/input/client_inputs.rs

@@ -0,0 +1,45 @@
+//! Handles client-side input using [`lightyear`], updating the
+//! [`ActionState`] of the affected entities, such as the `Player`.
+
+use bevy::prelude::*;
+use common::prelude::*;
+use lightyear::prelude::input::client::*;
+use lightyear::prelude::input::native::*;
+
+use bevy::window::{CursorGrabMode, CursorOptions};
+
+pub fn plugin(app: &mut App) {
+    app.add_systems(
+        FixedPreUpdate,
+        buffer_input.in_set(InputSystems::WriteClientInputs),
+    );
+}
+
+fn buffer_input(
+    keys: Res<ButtonInput<KeyCode>>,
+    player: Single<(&mut ActionState<Inputs>, &HeadOrientation), With<InputMarker<Inputs>>>,
+    cursor: Single<&CursorOptions>,
+) {
+    let (mut inputs, orientation) = player.into_inner();
+    inputs.0 = if cursor.grab_mode == CursorGrabMode::None {
+        Inputs {
+            look: *orientation,
+            ..default()
+        }
+    } else {
+        Inputs {
+            look: *orientation,
+            #[rustfmt::skip]
+            movement: {
+                let mut movement = Vec2::ZERO;
+                if keys.pressed(KeyCode::KeyD) { movement.x += 1.0; }
+                if keys.pressed(KeyCode::KeyA) { movement.x -= 1.0; }
+                if keys.pressed(KeyCode::KeyS) { movement.y += 1.0; }
+                if keys.pressed(KeyCode::KeyW) { movement.y -= 1.0; }
+                movement.clamp_length_max(1.0)
+            },
+            up: keys.pressed(KeyCode::Space),
+            down: keys.pressed(KeyCode::ShiftLeft),
+        }
+    }
+}

client/src/input/cursor_grab.rs

@@ -0,0 +1,63 @@
+use bevy::prelude::*;
+
+use bevy::window::{CursorGrabMode, CursorOptions};
+
+use crate::Screen;
+
+pub fn plugin(app: &mut App) {
+    app.add_systems(
+        PreUpdate,
+        update_cursor_grab.run_if(in_state(Screen::Gameplay)),
+    );
+}
+
+fn update_cursor_grab(
+    mut mouse_button_input: ResMut<ButtonInput<MouseButton>>,
+    key_input: Res<ButtonInput<KeyCode>>,
+    window: Single<(&mut Window, &mut CursorOptions)>,
+) {
+    let (mut window, mut cursor) = window.into_inner();
+
+    let is_grabbed = cursor.grab_mode != CursorGrabMode::None;
+    let request_grab = mouse_button_input.any_just_pressed([MouseButton::Left, MouseButton::Right]);
+    let request_ungrab = !window.focused || key_input.just_pressed(KeyCode::Escape);
+
+    if !is_grabbed && request_grab && !request_ungrab {
+        cursor.grab_mode = CursorGrabMode::Locked;
+
+        // To prevent other systems (such as `place_break_blocks`)
+        // from seeing the mouse button inputs, clear the state here.
+        mouse_button_input.clear();
+    }
+
+    if is_grabbed && request_ungrab && !request_grab {
+        cursor.grab_mode = CursorGrabMode::None;
+    }
+
+    if is_grabbed && !request_ungrab {
+        // Set the cursor position to the center of the window, so that when
+        // it is ungrabbed, it will reappear there. Because `is_grabbed` is
+        // not updated on grab, this block is delayed by one frame.
+        //
+        // On Wayland, since the cursor is locked into place, this only needs
+        // to be done once. Unfortunately, for some reason this doesn't work
+        // in the same frame as setting `grab_mode`, and would log an error.
+        //
+        // On X11, the cursor can't be locked into place, only confined to the
+        // window bounds, so we repeatedly move the cursor back to the center
+        // while it's grabbed.
+        //
+        // On the web, the cursor can be locked, but setting its position is
+        // not supported at all, so this would instead log a bunch of errors.
+        let center = window.resolution.size() / 2.;
+        #[cfg(not(target_family = "wasm"))] // skip on web
+        window.set_cursor_position(Some(center));
+    }
+
+    // Keep cursor visbility in sync with `grab_mode`.
+    cursor.visible = cursor.grab_mode == CursorGrabMode::None;
+}
+
+pub fn is_cursor_grabbed(cursor: Single<&CursorOptions>) -> bool {
+    cursor.grab_mode != CursorGrabMode::None
+}

client/src/input/head_orientation.rs

@@ -0,0 +1,30 @@
+use bevy::prelude::*;
+use common::prelude::*;
+use lightyear::prelude::input::native::*;
+
+use bevy::input::mouse::AccumulatedMouseMotion;
+
+use crate::input::is_cursor_grabbed;
+
+#[derive(Resource, Deref, DerefMut, Debug)]
+pub struct MouseSensitivity(Vec2);
+
+impl Default for MouseSensitivity {
+    fn default() -> Self {
+        Self(Vec2::splat(0.2).map(f32::to_radians))
+    }
+}
+
+pub fn plugin(app: &mut App) {
+    app.init_resource::<MouseSensitivity>();
+    app.add_systems(Update, update_head_orientation.run_if(is_cursor_grabbed));
+}
+
+fn update_head_orientation(
+    accumulated_mouse_motion: Res<AccumulatedMouseMotion>,
+    mouse_sensitivity: Res<MouseSensitivity>,
+    mut orientation: Single<&mut HeadOrientation, With<InputMarker<Inputs>>>,
+) {
+    let delta = accumulated_mouse_motion.delta * **mouse_sensitivity;
+    **orientation = orientation.update(delta);
+}

client/src/input/mod.rs

@@ -0,0 +1,15 @@
+use bevy::prelude::*;
+
+mod client_inputs;
+mod cursor_grab;
+mod head_orientation;
+
+pub use cursor_grab::is_cursor_grabbed;
+
+pub fn plugin(app: &mut App) {
+    app.add_plugins((
+        client_inputs::plugin,
+        cursor_grab::plugin,
+        head_orientation::plugin,
+    ));
+}

client/src/main.rs

@@ -9,16 +9,16 @@ use lightyear::prelude::input::native::InputMarker;
 use lightyear::prelude::server::Started;
 
 mod args;
-mod block_assets;
-mod camera;
+mod assets;
 mod input;
-mod loading;
 mod placement;
+mod ui;
 
 use args::*;
-use camera::*;
 use placement::*;
 
+use input::is_cursor_grabbed;
+
 #[derive(States, Clone, Copy, PartialEq, Eq, Hash, Debug)]
 pub enum Screen {
     Loading,
@@ -26,8 +26,12 @@ pub enum Screen {
 }
 
 fn main() -> Result {
+    let args = Args::parse();
     let mut app = App::new();
 
+    app.insert_resource(args);
+    app.insert_state(Screen::Loading);
+
     app.add_plugins(
         DefaultPlugins
             .set(WindowPlugin {
@@ -53,31 +57,16 @@ fn main() -> Result {
 
     app.add_plugins((
         bevy_fix_cursor_unlock_web::FixPointerUnlockPlugin,
-        ServerPlugin,
-        ClientPlugin,
         common::asset_loading::plugin,
-        block_assets::plugin,
-        loading::plugin,
+        common::network::plugin,
+        assets::plugin,
         input::plugin,
+        ui::plugin,
     ));
 
-    app.insert_resource(Args::parse());
-    app.insert_state(Screen::Loading);
-
     app.add_systems(
         OnEnter(Screen::Gameplay),
-        (setup_crosshair, setup_scene, start_server_or_connect),
-    );
-
-    // TODO: Create and configure `SystemSet`s for gameplay, input, etc.
-    app.add_systems(
-        Update,
-        (
-            cursor_grab,
-            update_crosshair_visibility.after(cursor_grab),
-            camera_look.after(cursor_grab).run_if(is_cursor_grabbed),
-        )
-            .run_if(in_state(Screen::Gameplay)),
+        (setup_scene, start_server_or_connect),
     );
 
     // `place_break_blocks` requires the camera's `GlobalTransform`.
@@ -90,7 +79,7 @@ fn main() -> Result {
     );
 
     app.add_observer(spawn_initial_blocks);
-    app.add_observer(handle_predicted_spawn);
+    app.add_observer(handle_predicted_player_spawn);
 
     app.run();
     Ok(())
@@ -136,12 +125,12 @@ fn spawn_initial_blocks(_event: On<Add, Started>, mut blocks: Blocks) {
 }
 
 /// When the `Predicted` player we control is being spawned, insert necessary components.
-fn handle_predicted_spawn(event: On<Add, Predicted>, mut commands: Commands) {
+fn handle_predicted_player_spawn(event: On<Add, Predicted>, mut commands: Commands) {
     let player = event.entity;
-    commands
-        .entity(player)
+    commands.entity(player).insert((
         // Handle inputs on this entity.
-        .insert(InputMarker::<Inputs>::default())
-        // Add a camera that can be freely rotated.
-        .with_child((Camera3d::default(), CameraFreeLook::default()));
+        InputMarker::<Inputs>::default(),
+        // TODO: Attach camera to player head eventually.
+        Camera3d::default(),
+    ));
 }

client/src/ui/crosshair.rs

@@ -0,0 +1,68 @@
+use bevy::prelude::*;
+use common::prelude::*;
+
+use bevy::window::{CursorGrabMode, CursorOptions};
+
+use crate::Screen;
+
+pub fn plugin(app: &mut App) {
+    app.load_resource::<CrosshairAssets>();
+    app.add_systems(OnEnter(Screen::Gameplay), setup_crosshair);
+    app.add_systems(Update, update_crosshair_visibility);
+}
+
+#[derive(Resource, Asset, Reflect, Clone)]
+#[reflect(Resource)]
+pub struct CrosshairAssets {
+    #[dependency]
+    image: Handle<Image>,
+}
+
+impl FromWorld for CrosshairAssets {
+    fn from_world(world: &mut World) -> Self {
+        let assets = world.resource::<AssetServer>();
+        Self {
+            image: assets.load("crosshair.png"),
+        }
+    }
+}
+
+#[derive(Component)]
+pub struct Crosshair;
+
+fn setup_crosshair(mut commands: Commands, assets: Res<CrosshairAssets>) {
+    commands.spawn((
+        Node {
+            width: percent(100),
+            height: percent(100),
+            align_items: AlignItems::Center,
+            justify_content: JustifyContent::Center,
+            ..default()
+        },
+        children![(
+            Crosshair,
+            Node {
+                width: px(64),
+                height: px(64),
+                ..default()
+            },
+            ImageNode {
+                image: assets.image.clone(),
+                ..default()
+            },
+            // Hidden by default, because cursor shouldn't be grabbed at startup either.
+            Visibility::Hidden,
+        )],
+    ));
+}
+
+fn update_crosshair_visibility(
+    cursor: Single<&CursorOptions, Changed<CursorOptions>>,
+    crosshair: Single<&mut Visibility, With<Crosshair>>,
+) {
+    let is_grabbed = cursor.grab_mode != CursorGrabMode::None;
+    let mut crosshair_visibility = crosshair.into_inner();
+    *crosshair_visibility = (!is_grabbed || cursor.visible)
+        .then_some(Visibility::Hidden)
+        .unwrap_or_default();
+}

client/src/ui/mod.rs

@@ -0,0 +1,8 @@
+use bevy::prelude::*;
+
+mod crosshair;
+mod loading_screen;
+
+pub fn plugin(app: &mut App) {
+    app.add_plugins((crosshair::plugin, loading_screen::plugin));
+}

common/src/lib.rs

@@ -3,13 +3,13 @@ pub mod block;
 pub mod network;
 pub mod player;
 
-// This is mostly just re-exporting everything for now, but in the future,
-// we might want to select exactly what's exposed by the `prelude` module.
 pub mod prelude {
-    pub use super::network;
+    pub use crate::network;
 
-    pub use super::block::*;
-    pub use super::player::*;
+    pub use crate::block::*;
+    pub use crate::network::protocol::*;
+    pub use crate::player::*;
 
-    pub use super::asset_loading::LoadResource;
+    // Allows use of the `App::load_resource` extension trait function.
+    pub use crate::asset_loading::LoadResource;
 }

common/src/network/client.rs

@@ -2,23 +2,13 @@ use bevy::prelude::*;
 use lightyear::prelude::client::*;
 use lightyear::prelude::*;
 
-pub use super::client_webtransport::ConnectWebTransportCommand;
+pub(super) fn plugin(app: &mut App) {
+    app.add_plugins(ClientPlugins::default());
 
-pub struct ClientPlugin;
+    app.add_observer(on_connected);
+    app.add_observer(on_disconnected);
 
-impl Plugin for ClientPlugin {
-    fn build(&self, app: &mut App) {
-        app.add_plugins(ClientPlugins::default());
-
-        if !app.is_plugin_added::<super::ProtocolPlugin>() {
-            app.add_plugins(super::ProtocolPlugin);
-        }
-
-        app.add_observer(on_connected);
-        app.add_observer(on_disconnected);
-
-        app.add_observer(autoconnect_host_client);
-    }
+    app.add_observer(autoconnect_host_client);
 }
 
 /// Automatically creates a "host client" to connect to the local server when it is started.

common/src/network/mod.rs

@@ -1,12 +1,19 @@
-mod client;
-mod protocol;
-mod server;
+use bevy::prelude::*;
+
+pub(crate) mod protocol;
 
+mod client;
 mod client_webtransport;
+mod server;
 mod server_webtransport;
 
-pub use client::*;
-pub use protocol::*;
-pub use server::*;
+pub use crate::network::client_webtransport::ConnectWebTransportCommand;
+pub use crate::network::server::StartLocalServerCommand;
+#[cfg(not(target_family = "wasm"))]
+pub use crate::network::server_webtransport::StartWebTransportServerCommand;
 
 pub const DEFAULT_PORT: u16 = 13580;
+
+pub fn plugin(app: &mut App) {
+    app.add_plugins((protocol::plugin, client::plugin, server::plugin));
+}

common/src/network/protocol.rs

@@ -6,10 +6,26 @@ use lightyear::input::native::plugin::InputPlugin;
 use serde::{Deserialize, Serialize};
 
 use crate::block::Block;
-use crate::player::Player;
+use crate::player::{HeadOrientation, Player};
+
+pub(super) fn plugin(app: &mut App) {
+    app.add_plugins(InputPlugin::<Inputs>::default());
+
+    // marker components
+    app.register_component::<Player>();
+    app.register_component::<Block>();
+
+    app.register_component::<Transform>()
+        .add_prediction()
+        .add_interpolation_with(interpolate_transform);
+
+    // unified update systems
+    app.add_systems(FixedUpdate, crate::player::movement);
+}
 
 #[derive(Default, Deserialize, Serialize, Reflect, Clone, PartialEq, Debug)]
 pub struct Inputs {
+    pub look: HeadOrientation,
     pub movement: Vec2,
     pub up: bool,
     pub down: bool,
@@ -19,25 +35,6 @@ impl MapEntities for Inputs {
     fn map_entities<E: EntityMapper>(&mut self, _entity_mapper: &mut E) {}
 }
 
-pub struct ProtocolPlugin;
-
-impl Plugin for ProtocolPlugin {
-    fn build(&self, app: &mut App) {
-        app.add_plugins(InputPlugin::<Inputs>::default());
-
-        // marker components
-        app.register_component::<Player>();
-        app.register_component::<Block>();
-
-        app.register_component::<Transform>()
-            .add_prediction()
-            .add_interpolation_with(interpolate_transform);
-
-        // unified update systems
-        app.add_systems(FixedUpdate, crate::player::movement);
-    }
-}
-
 fn interpolate_transform(start: Transform, other: Transform, t: f32) -> Transform {
     Transform {
         translation: start.translation.lerp(other.translation, t),

common/src/network/server.rs

@@ -4,29 +4,18 @@ use lightyear::prelude::*;
 
 use crate::player::Player;
 
-#[cfg(not(target_family = "wasm"))]
-pub use super::server_webtransport::StartWebTransportServerCommand;
+pub(super) fn plugin(app: &mut App) {
+    app.add_plugins(ServerPlugins::default());
 
-pub struct ServerPlugin;
+    // TODO: See what happens when we try to start a server, but it
+    //       can't, for example due to the port already being in use.
+    app.add_observer(on_server_started);
+    app.add_observer(on_server_stopped);
+    app.add_observer(handle_client_connected);
+    app.add_observer(handle_client_disconnected);
 
-impl Plugin for ServerPlugin {
-    fn build(&self, app: &mut App) {
-        app.add_plugins(ServerPlugins::default());
-
-        if !app.is_plugin_added::<super::ProtocolPlugin>() {
-            app.add_plugins(super::ProtocolPlugin);
-        }
-
-        // TODO: See what happens when we try to start a server, but it
-        //       can't, for example due to the port already being in use.
-        app.add_observer(on_server_started);
-        app.add_observer(on_server_stopped);
-        app.add_observer(handle_client_connected);
-        app.add_observer(handle_client_disconnected);
-
-        #[cfg(not(target_family = "wasm"))]
-        app.add_observer(super::server_webtransport::print_certificate_digest);
-    }
+    #[cfg(not(target_family = "wasm"))]
+    app.add_observer(super::server_webtransport::print_certificate_digest);
 }
 
 /// Starts a local-only server that only a host-client can connect to.

common/src/player.rs

@@ -1,40 +1,95 @@
+use std::f32::consts::{PI, TAU};
+
 use bevy::prelude::*;
 use lightyear::prelude::*;
 
 use lightyear::prelude::input::native::ActionState;
 use serde::{Deserialize, Serialize};
 
-use crate::network::Inputs;
+use crate::network::protocol::Inputs;
 
 const MOVEMENT_SPEED: f32 = 5.0;
+const PITCH_LIMIT: f32 = TAU / 4.0;
 
-#[derive(Component, PartialEq, Deserialize, Serialize)]
-#[require(Transform)]
+#[derive(Component, Deserialize, Serialize, PartialEq)]
+#[require(Transform, HeadOrientation)]
 pub struct Player;
 
+#[derive(Component, Deserialize, Serialize, Reflect, Default, Clone, Copy, PartialEq, Debug)]
+#[serde(from = "HeadOrientationUnchecked")]
+pub struct HeadOrientation {
+    yaw: f32,
+    pitch: f32,
+}
+
+impl HeadOrientation {
+    pub fn new(yaw: f32, pitch: f32) -> Self {
+        Self {
+            yaw: (yaw + PI).rem_euclid(TAU) - PI,
+            pitch: pitch.clamp(-PITCH_LIMIT, PITCH_LIMIT),
+        }
+    }
+
+    pub fn yaw(&self) -> f32 {
+        self.yaw
+    }
+
+    pub fn pitch(&self) -> f32 {
+        self.pitch
+    }
+
+    pub fn update(&self, motion: Vec2) -> Self {
+        Self::new(self.yaw - motion.x, self.pitch - motion.y)
+    }
+
+    pub fn to_quat(&self) -> Quat {
+        Quat::from_euler(EulerRot::ZYX, 0.0, self.yaw, self.pitch)
+    }
+}
+
+#[derive(Deserialize)]
+#[serde(rename = "HeadOrientation")]
+struct HeadOrientationUnchecked {
+    yaw: f32,
+    pitch: f32,
+}
+
+impl From<HeadOrientationUnchecked> for HeadOrientation {
+    fn from(value: HeadOrientationUnchecked) -> Self {
+        Self::new(value.yaw, value.pitch)
+    }
+}
+
 pub fn movement(
     time: Res<Time<Fixed>>,
     mut players: Query<
-        (&mut Transform, &ActionState<Inputs>),
-        // Must be a `Player` which is either be `ControlledBy` a remote
-        // client (server-side) or its movement `Predicted` on the client.
+        (&mut Transform, &mut HeadOrientation, &ActionState<Inputs>),
+        // Must be a `Player` which is either be `ControlledBy` a
+        // remote client (server-side) or `Predicted` on the client.
         (With<Player>, Or<(With<ControlledBy>, With<Predicted>)>),
     >,
 ) {
-    for (mut transform, input) in players.iter_mut() {
+    for (mut transform, mut orientation, inputs) in players.iter_mut() {
+        *orientation = inputs.look;
+
         let dt = time.delta_secs();
         let mut translation = Vec3::ZERO;
-        if input.movement != Vec2::ZERO {
-            let movement = input.movement.clamp_length_max(1.0);
+        if inputs.movement != Vec2::ZERO {
+            let rotation = Rot2::radians(-orientation.yaw());
+            let movement = rotation * inputs.movement.clamp_length_max(1.0);
             translation.x += movement.x;
             translation.z += movement.y;
         }
-        if input.up {
+        if inputs.up {
             translation.y += 1.0;
         }
-        if input.down {
+        if inputs.down {
             translation.y -= 1.0;
         }
+
         transform.translation += translation * MOVEMENT_SPEED * dt;
+
+        // TODO: Should affect camera/head rotation only, not the entire player.
+        transform.rotation = orientation.to_quat();
     }
 }