Remove PI

examples/3d/deferred_rendering.rs

@@ -81,7 +81,7 @@ fn setup(
     ));
     commands.spawn((
         SceneRoot(helmet_scene),
-        Transform::from_xyz(-4.0, 0.0, -3.0).with_rotation(Quat::from_rotation_y(PI)),
+        Transform::from_xyz(-4.0, 0.0, -3.0).looking_to(Vec3::Z, Vec3::Y),
     ));
 
     let mut forward_mat: StandardMaterial = Color::srgb(0.1, 0.2, 0.1).into();

examples/3d/meshlet.rs

@@ -109,7 +109,7 @@ fn setup(
             MeshMaterial3d(debug_material.clone()),
             Transform::default()
                 .with_scale(Vec3::splat(0.2))
-                .with_rotation(Quat::from_rotation_y(PI))
+                .looking_to(Vec3::Z, Vec3::Y)
                 .with_translation(Vec3::new(x as f32 / 2.0, 0.0, 0.3)),
         ));
     }