docs/bevy/examples/3d/rotate_environment_map.rs 3.9 K · 125 lines · raw · history

1 //! Demonstrates how to rotate the skybox and the environment map simultaneously.
2
3 use std::f32::consts::PI;
4
5 use bevy::{
6 camera::Hdr,
7 color::palettes::css::{GOLD, WHITE},
8 core_pipeline::tonemapping::Tonemapping::AcesFitted,
9 image::ImageLoaderSettings,
10 light::Skybox,
11 prelude::*,
12 };
13
14 /// Entry point.
15 pub fn main() {
16 App::new()
17 .add_plugins(DefaultPlugins)
18 .add_systems(Startup, setup)
19 .add_systems(Update, rotate_skybox_and_environment_map)
20 .run();
21 }
22
23 /// Initializes the scene.
24 fn setup(
25 mut commands: Commands,
26 mut meshes: ResMut<Assets<Mesh>>,
27 mut materials: ResMut<Assets<StandardMaterial>>,
28 asset_server: Res<AssetServer>,
29 ) {
30 let sphere_mesh = create_sphere_mesh(&mut meshes);
31 spawn_sphere(&mut commands, &mut materials, &asset_server, &sphere_mesh);
32 spawn_light(&mut commands);
33 spawn_camera(&mut commands, &asset_server);
34 }
35
36 /// Rotate the skybox and the environment map per frame.
37 fn rotate_skybox_and_environment_map(
38 mut environments: Query<(&mut Skybox, &mut EnvironmentMapLight)>,
39 time: Res<Time>,
40 ) {
41 let now = time.elapsed_secs();
42 let rotation = Quat::from_rotation_y(0.2 * now);
43 for (mut skybox, mut environment_map) in environments.iter_mut() {
44 skybox.rotation = rotation;
45 environment_map.rotation = rotation;
46 }
47 }
48
49 /// Generates a sphere.
50 fn create_sphere_mesh(meshes: &mut Assets<Mesh>) -> Handle<Mesh> {
51 // We're going to use normal maps, so make sure we've generated tangents, or
52 // else the normal maps won't show up.
53
54 let mut sphere_mesh = Sphere::new(1.0).mesh().build();
55 sphere_mesh
56 .generate_tangents()
57 .expect("Failed to generate tangents");
58 meshes.add(sphere_mesh)
59 }
60
61 /// Spawn a regular object with a clearcoat layer. This looks like car paint.
62 fn spawn_sphere(
63 commands: &mut Commands,
64 materials: &mut Assets<StandardMaterial>,
65 asset_server: &AssetServer,
66 sphere_mesh: &Handle<Mesh>,
67 ) {
68 commands.spawn((
69 Mesh3d(sphere_mesh.clone()),
70 MeshMaterial3d(
71 materials.add(StandardMaterial {
72 clearcoat: 1.0,
73 clearcoat_perceptual_roughness: 0.3,
74 clearcoat_normal_texture: Some(
75 asset_server
76 .load_builder()
77 .with_settings(|settings: &mut ImageLoaderSettings| {
78 settings.is_srgb = false;
79 })
80 .load("textures/ScratchedGold-Normal.png"),
81 ),
82 metallic: 0.9,
83 perceptual_roughness: 0.1,
84 base_color: GOLD.into(),
85 ..default()
86 }),
87 ),
88 Transform::from_xyz(0.0, 0.0, 0.0).with_scale(Vec3::splat(1.25)),
89 ));
90 }
91
92 /// Spawns a light.
93 fn spawn_light(commands: &mut Commands) {
94 commands.spawn(PointLight {
95 color: WHITE.into(),
96 intensity: 100000.0,
97 ..default()
98 });
99 }
100
101 /// Spawns a camera with associated skybox and environment map.
102 fn spawn_camera(commands: &mut Commands, asset_server: &AssetServer) {
103 commands
104 .spawn((
105 Camera3d::default(),
106 Hdr,
107 Projection::Perspective(PerspectiveProjection {
108 fov: 27.0 / 180.0 * PI,
109 ..default()
110 }),
111 Transform::from_xyz(0.0, 0.0, 10.0),
112 AcesFitted,
113 ))
114 .insert(Skybox {
115 brightness: 5000.0,
116 image: Some(asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2")),
117 ..default()
118 })
119 .insert(EnvironmentMapLight {
120 diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
121 specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
122 intensity: 2000.0,
123 ..default()
124 });
125 }