small changes

src/main.rs

@@ -0,0 +1,58 @@
+//! A simple 3D scene with light shining over a cube sitting on a plane.
+
+use bevy::{
+    core_pipeline::clear_color::ClearColorConfig, prelude::*, render::camera::RenderTarget,
+};
+use bevy_oxr::{DefaultXrPlugins, LEFT_XR_TEXTURE_HANDLE};
+
+fn main() {
+    App::new()
+        .add_plugins(DefaultXrPlugins)
+        .add_systems(Startup, setup)
+        .run();
+}
+
+/// set up a simple 3D scene
+fn setup(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+) {
+    // circular base
+    commands.spawn(PbrBundle {
+        mesh: meshes.add(shape::Circle::new(4.0).into()),
+        material: materials.add(Color::WHITE.into()),
+        transform: Transform::from_rotation(Quat::from_rotation_x(-std::f32::consts::FRAC_PI_2)),
+        ..default()
+    });
+    // cube
+    commands.spawn(PbrBundle {
+        mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
+        material: materials.add(Color::rgb_u8(124, 144, 255).into()),
+        transform: Transform::from_xyz(0.0, 0.5, 0.0),
+        ..default()
+    });
+    // light
+    commands.spawn(PointLightBundle {
+        point_light: PointLight {
+            intensity: 1500.0,
+            shadows_enabled: true,
+            ..default()
+        },
+        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        ..default()
+    });
+    // camera
+    commands.spawn(Camera3dBundle {
+        transform: Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
+        camera: Camera {
+            target: RenderTarget::TextureView(LEFT_XR_TEXTURE_HANDLE),
+            ..default()
+        },
+        camera_3d: Camera3d {
+            clear_color: ClearColorConfig::Custom(Color::RED),
+            ..default()
+        },
+        ..default()
+    });
+}