From b09b4a6c8854d8c253e2129b57a9637f4c362fbe Mon Sep 17 00:00:00 2001
From: Alexander Foremny <aforemny@posteo.de>
Date: Sun, 24 Mar 2024 15:55:06 +0100
Subject: feat: camera controls

---
 src/client.rs | 75 ++++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 59 insertions(+), 16 deletions(-)

(limited to 'src/client.rs')

diff --git a/src/client.rs b/src/client.rs
index d536dce..bff66cd 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -57,6 +57,12 @@ struct MyFaction(pub Faction);
 #[derive(Resource)]
 struct Attack(Option<AbilitySlot>);
 
+#[derive(Resource, Default)]
+struct CameraControls {
+    pub direction: Vec2,
+    pub locked: bool,
+}
+
 struct ClientPlugin {
     pub server_addr: Option<SocketAddr>,
     pub client_id: u64,
@@ -71,6 +77,7 @@ impl Plugin for ClientPlugin {
             .insert_resource(MyChampion(self.champion))
             .insert_resource(MyFaction(self.faction))
             .insert_resource(Attack(None))
+            .insert_resource(CameraControls::default())
             .add_plugins(NetworkPlugin {
                 server_addr: self.server_addr.clone(),
                 client_id: self.client_id,
@@ -105,7 +112,14 @@ impl Plugin for ClientPlugin {
                         .chain(),
                 ),
             )
-            .add_systems(Update, move_camera)
+            .add_systems(
+                Update,
+                (
+                    control_camera,
+                    lock_camera,
+                    move_camera.after(control_camera).after(lock_camera),
+                ),
+            )
             .add_systems(
                 FixedPreUpdate,
                 buffer_input
@@ -872,26 +886,55 @@ fn health_indicator_despawn(
     }
 }
 
-const CAMERA_MOVEMENT_SPEED: f32 = 100.;
-
 fn move_camera(
     mut cameras: Query<&mut Transform, With<Camera>>,
-    players: Query<(&PlayerId, &PlayerPosition, &Shape)>,
-    client_id: Res<ClientId>,
     time: Res<Time>,
+    camera_controls: Res<CameraControls>,
+    client_id: Res<ClientId>,
+    players: Query<(&PlayerId, &PlayerPosition, &Shape)>,
 ) {
-    let Some(player_position) = player_position(&client_id, &players) else {
-        return;
-    };
     let dt = time.delta().as_secs_f32();
     for mut transform in cameras.iter_mut() {
-        let direction = (Vec3::new(
-            player_position.0.x,
-            player_position.0.y,
-            transform.translation.z,
-        ) - transform.translation)
-            .normalize_or_zero();
-        transform.translation +=
-            (dt * CAMERA_MOVEMENT_SPEED).min(direction.length()) * direction.normalize_or_zero();
+        if camera_controls.locked {
+            let Some(player_position) = player_position(&client_id, &players) else {
+                continue;
+            };
+            transform.translation = Vec3::new(player_position.0.x, player_position.0.y, 0.);
+            continue;
+        }
+        let direction = Vec3::new(camera_controls.direction.x, camera_controls.direction.y, 0.);
+        transform.translation += dt * CAMERA_MOVEMENT_SPEED * direction;
     }
 }
+
+fn lock_camera(
+    mut camera_controls: ResMut<CameraControls>,
+    keyboard_input: Res<ButtonInput<KeyCode>>,
+) {
+    camera_controls.locked = keyboard_input.pressed(KeyCode::Space);
+}
+
+const CAMERA_MOVEMENT_SPEED: f32 = 150.;
+
+fn control_camera(mut camera_controls: ResMut<CameraControls>, windows: Query<&Window>) {
+    let window = windows.single();
+    let Some(cursor_position) = window.cursor_position() else {
+        return;
+    };
+    if cursor_position.x < 50. {
+        camera_controls.direction.x = -1.;
+    } else if window.resolution.width() - cursor_position.x < 50. {
+        camera_controls.direction.x = 1.;
+    } else {
+        camera_controls.direction.x = 0.;
+    }
+    if cursor_position.y < 50. {
+        camera_controls.direction.y = 1.;
+    } else if window.resolution.height() - cursor_position.y < 50. {
+        camera_controls.direction.y = -1.;
+    } else {
+        camera_controls.direction.y = 0.;
+    }
+
+    camera_controls.direction = camera_controls.direction.normalize_or_zero();
+}
-- 
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