Update first_person_view_model example to use children! macro

Author: krunchington

examples/camera/first_person_view_model.rs

@@ -104,25 +104,22 @@ fn spawn_view_model(
     let arm = meshes.add(Cuboid::new(0.1, 0.1, 0.5));
     let arm_material = materials.add(Color::from(tailwind::TEAL_200));
 
-    commands
-        .spawn((
-            Player,
-            CameraSensitivity::default(),
-            Transform::from_xyz(0.0, 1.0, 0.0),
-            Visibility::default(),
-        ))
-        .with_children(|parent| {
-            parent.spawn((
+    commands.spawn((
+        Player,
+        CameraSensitivity::default(),
+        Transform::from_xyz(0.0, 1.0, 0.0),
+        Visibility::default(),
+        children![
+            (
                 WorldModelCamera,
                 Camera3d::default(),
                 Projection::from(PerspectiveProjection {
                     fov: 90.0_f32.to_radians(),
                     ..default()
                 }),
-            ));
-
+            ),
             // Spawn view model camera.
-            parent.spawn((
+            (
                 Camera3d::default(),
                 Camera {
                     // Bump the order to render on top of the world model.
@@ -135,19 +132,19 @@ fn spawn_view_model(
                 }),
                 // Only render objects belonging to the view model.
                 RenderLayers::layer(VIEW_MODEL_RENDER_LAYER),
-            ));
-
+            ),
             // Spawn the player's right arm.
-            parent.spawn((
+            (
                 Mesh3d(arm),
                 MeshMaterial3d(arm_material),
                 Transform::from_xyz(0.2, -0.1, -0.25),
                 // Ensure the arm is only rendered by the view model camera.
                 RenderLayers::layer(VIEW_MODEL_RENDER_LAYER),
                 // The arm is free-floating, so shadows would look weird.
                 NotShadowCaster,
-            ));
-        });
+            ),
+        ],
+    ));
 }
 
 fn spawn_world_model(