Bound player

src/bounds.rs

@@ -0,0 +1,25 @@
+use bevy::prelude::*;
+
+use crate::{collision::Collider, player::Player};
+
+fn constrain_player(
+    mut player: Single<(&Collider, &mut Transform), With<Player>>,
+    camera: Single<&Camera, With<Camera2d>>,
+) {
+    let viewport = camera
+        .logical_viewport_size()
+        .unwrap_or(Vec2::new(1920.0, 1080.0));
+    let half_width = player.0.size.x / 2.0;
+    let border = viewport.x / 2.0 - half_width;
+
+    // Restrict player position
+    player.1.translation.x = player.1.translation.x.clamp(-border, border);
+}
+
+pub struct BoundsPlugin;
+
+impl Plugin for BoundsPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_systems(Update, constrain_player);
+    }
+}

src/main.rs

@@ -1,12 +1,14 @@
 use bevy::{prelude::*, window::PresentMode};
 
 use crate::background::BackgroundPlugin;
+use crate::bounds::BoundsPlugin;
 use crate::camera::CameraPlugin;
 use crate::collision::CollisionPlugin;
 use crate::obstacle::ObstaclePlugin;
 use crate::player::PlayerPlugin;
 
 mod background;
+mod bounds;
 mod camera;
 mod collision;
 mod obstacle;
@@ -28,5 +30,6 @@ fn main() {
         .add_plugins(CameraPlugin) // Camera
         .add_plugins(CollisionPlugin) // Collisions
         .add_plugins(ObstaclePlugin)
+        .add_plugins(BoundsPlugin)
         .run();
 }