mirror of
https://github.com/bevyengine/bevy
synced 2024-12-24 03:53:06 +00:00
25bfa80e60
# Objective Yet another PR for migrating stuff to required components. This time, cameras! ## Solution As per the [selected proposal](https://hackmd.io/tsYID4CGRiWxzsgawzxG_g#Combined-Proposal-1-Selected), deprecate `Camera2dBundle` and `Camera3dBundle` in favor of `Camera2d` and `Camera3d`. Adding a `Camera` without `Camera2d` or `Camera3d` now logs a warning, as suggested by Cart [on Discord](https://discord.com/channels/691052431525675048/1264881140007702558/1291506402832945273). I would personally like cameras to work a bit differently and be split into a few more components, to avoid some footguns and confusing semantics, but that is more controversial, and shouldn't block this core migration. ## Testing I ran a few 2D and 3D examples, and tried cameras with and without render graphs. --- ## Migration Guide `Camera2dBundle` and `Camera3dBundle` have been deprecated in favor of `Camera2d` and `Camera3d`. Inserting them will now also insert the other components required by them automatically.
644 lines
20 KiB
Rust
644 lines
20 KiB
Rust
//! This example shows how irradiance volumes affect the indirect lighting of
|
|
//! objects in a scene.
|
|
//!
|
|
//! The controls are as follows:
|
|
//!
|
|
//! * Space toggles the irradiance volume on and off.
|
|
//!
|
|
//! * Enter toggles the camera rotation on and off.
|
|
//!
|
|
//! * Tab switches the object between a plain sphere and a running fox.
|
|
//!
|
|
//! * Backspace shows and hides the voxel cubes.
|
|
//!
|
|
//! * Clicking anywhere moves the object.
|
|
|
|
use bevy::{
|
|
color::palettes::css::*,
|
|
core_pipeline::Skybox,
|
|
math::{uvec3, vec3},
|
|
pbr::{
|
|
irradiance_volume::IrradianceVolume, ExtendedMaterial, MaterialExtension, NotShadowCaster,
|
|
},
|
|
prelude::*,
|
|
render::render_resource::{AsBindGroup, ShaderRef, ShaderType},
|
|
window::PrimaryWindow,
|
|
};
|
|
|
|
/// This example uses a shader source file from the assets subdirectory
|
|
const SHADER_ASSET_PATH: &str = "shaders/irradiance_volume_voxel_visualization.wgsl";
|
|
|
|
// Rotation speed in radians per frame.
|
|
const ROTATION_SPEED: f32 = 0.2;
|
|
|
|
const FOX_SCALE: f32 = 0.05;
|
|
const SPHERE_SCALE: f32 = 2.0;
|
|
|
|
const IRRADIANCE_VOLUME_INTENSITY: f32 = 1800.0;
|
|
|
|
const AMBIENT_LIGHT_BRIGHTNESS: f32 = 0.06;
|
|
|
|
const VOXEL_CUBE_SCALE: f32 = 0.4;
|
|
|
|
static DISABLE_IRRADIANCE_VOLUME_HELP_TEXT: &str = "Space: Disable the irradiance volume";
|
|
static ENABLE_IRRADIANCE_VOLUME_HELP_TEXT: &str = "Space: Enable the irradiance volume";
|
|
|
|
static HIDE_VOXELS_HELP_TEXT: &str = "Backspace: Hide the voxels";
|
|
static SHOW_VOXELS_HELP_TEXT: &str = "Backspace: Show the voxels";
|
|
|
|
static STOP_ROTATION_HELP_TEXT: &str = "Enter: Stop rotation";
|
|
static START_ROTATION_HELP_TEXT: &str = "Enter: Start rotation";
|
|
|
|
static SWITCH_TO_FOX_HELP_TEXT: &str = "Tab: Switch to a skinned mesh";
|
|
static SWITCH_TO_SPHERE_HELP_TEXT: &str = "Tab: Switch to a plain sphere mesh";
|
|
|
|
static CLICK_TO_MOVE_HELP_TEXT: &str = "Left click: Move the object";
|
|
|
|
static GIZMO_COLOR: Color = Color::Srgba(YELLOW);
|
|
|
|
static VOXEL_FROM_WORLD: Mat4 = Mat4::from_cols_array_2d(&[
|
|
[-42.317566, 0.0, 0.0, 0.0],
|
|
[0.0, 0.0, 44.601563, 0.0],
|
|
[0.0, 16.73776, 0.0, 0.0],
|
|
[0.0, 6.544792, 0.0, 1.0],
|
|
]);
|
|
|
|
// The mode the application is in.
|
|
#[derive(Resource)]
|
|
struct AppStatus {
|
|
// Whether the user wants the irradiance volume to be applied.
|
|
irradiance_volume_present: bool,
|
|
// Whether the user wants the unskinned sphere mesh or the skinned fox mesh.
|
|
model: ExampleModel,
|
|
// Whether the user has requested the scene to rotate.
|
|
rotating: bool,
|
|
// Whether the user has requested the voxels to be displayed.
|
|
voxels_visible: bool,
|
|
}
|
|
|
|
// Which model the user wants to display.
|
|
#[derive(Clone, Copy, PartialEq)]
|
|
enum ExampleModel {
|
|
// The plain sphere.
|
|
Sphere,
|
|
// The fox, which is skinned.
|
|
Fox,
|
|
}
|
|
|
|
// Handles to all the assets used in this example.
|
|
#[derive(Resource)]
|
|
struct ExampleAssets {
|
|
// The glTF scene containing the colored floor.
|
|
main_scene: Handle<Scene>,
|
|
|
|
// The 3D texture containing the irradiance volume.
|
|
irradiance_volume: Handle<Image>,
|
|
|
|
// The plain sphere mesh.
|
|
main_sphere: Handle<Mesh>,
|
|
|
|
// The material used for the sphere.
|
|
main_sphere_material: Handle<StandardMaterial>,
|
|
|
|
// The glTF scene containing the animated fox.
|
|
fox: Handle<Scene>,
|
|
|
|
// The graph containing the animation that the fox will play.
|
|
fox_animation_graph: Handle<AnimationGraph>,
|
|
|
|
// The node within the animation graph containing the animation.
|
|
fox_animation_node: AnimationNodeIndex,
|
|
|
|
// The voxel cube mesh.
|
|
voxel_cube: Handle<Mesh>,
|
|
|
|
// The skybox.
|
|
skybox: Handle<Image>,
|
|
}
|
|
|
|
// The sphere and fox both have this component.
|
|
#[derive(Component)]
|
|
struct MainObject;
|
|
|
|
// Marks each of the voxel cubes.
|
|
#[derive(Component)]
|
|
struct VoxelCube;
|
|
|
|
// Marks the voxel cube parent object.
|
|
#[derive(Component)]
|
|
struct VoxelCubeParent;
|
|
|
|
type VoxelVisualizationMaterial = ExtendedMaterial<StandardMaterial, VoxelVisualizationExtension>;
|
|
|
|
#[derive(Asset, TypePath, AsBindGroup, Debug, Clone)]
|
|
struct VoxelVisualizationExtension {
|
|
#[uniform(100)]
|
|
irradiance_volume_info: VoxelVisualizationIrradianceVolumeInfo,
|
|
}
|
|
|
|
#[derive(ShaderType, Debug, Clone)]
|
|
struct VoxelVisualizationIrradianceVolumeInfo {
|
|
world_from_voxel: Mat4,
|
|
voxel_from_world: Mat4,
|
|
resolution: UVec3,
|
|
intensity: f32,
|
|
}
|
|
|
|
fn main() {
|
|
// Create the example app.
|
|
App::new()
|
|
.add_plugins(DefaultPlugins.set(WindowPlugin {
|
|
primary_window: Some(Window {
|
|
title: "Bevy Irradiance Volumes Example".into(),
|
|
..default()
|
|
}),
|
|
..default()
|
|
}))
|
|
.add_plugins(MaterialPlugin::<VoxelVisualizationMaterial>::default())
|
|
.init_resource::<AppStatus>()
|
|
.init_resource::<ExampleAssets>()
|
|
.insert_resource(AmbientLight {
|
|
color: Color::WHITE,
|
|
brightness: 0.0,
|
|
})
|
|
.add_systems(Startup, setup)
|
|
.add_systems(PreUpdate, create_cubes)
|
|
.add_systems(Update, rotate_camera)
|
|
.add_systems(Update, play_animations)
|
|
.add_systems(
|
|
Update,
|
|
handle_mouse_clicks
|
|
.after(rotate_camera)
|
|
.after(play_animations),
|
|
)
|
|
.add_systems(
|
|
Update,
|
|
change_main_object
|
|
.after(rotate_camera)
|
|
.after(play_animations),
|
|
)
|
|
.add_systems(
|
|
Update,
|
|
toggle_irradiance_volumes
|
|
.after(rotate_camera)
|
|
.after(play_animations),
|
|
)
|
|
.add_systems(
|
|
Update,
|
|
toggle_voxel_visibility
|
|
.after(rotate_camera)
|
|
.after(play_animations),
|
|
)
|
|
.add_systems(
|
|
Update,
|
|
toggle_rotation.after(rotate_camera).after(play_animations),
|
|
)
|
|
.add_systems(
|
|
Update,
|
|
draw_gizmo
|
|
.after(handle_mouse_clicks)
|
|
.after(change_main_object)
|
|
.after(toggle_irradiance_volumes)
|
|
.after(toggle_voxel_visibility)
|
|
.after(toggle_rotation),
|
|
)
|
|
.add_systems(
|
|
Update,
|
|
update_text
|
|
.after(handle_mouse_clicks)
|
|
.after(change_main_object)
|
|
.after(toggle_irradiance_volumes)
|
|
.after(toggle_voxel_visibility)
|
|
.after(toggle_rotation),
|
|
)
|
|
.run();
|
|
}
|
|
|
|
// Spawns all the scene objects.
|
|
fn setup(mut commands: Commands, assets: Res<ExampleAssets>, app_status: Res<AppStatus>) {
|
|
spawn_main_scene(&mut commands, &assets);
|
|
spawn_camera(&mut commands, &assets);
|
|
spawn_irradiance_volume(&mut commands, &assets);
|
|
spawn_light(&mut commands);
|
|
spawn_sphere(&mut commands, &assets);
|
|
spawn_voxel_cube_parent(&mut commands);
|
|
spawn_fox(&mut commands, &assets);
|
|
spawn_text(&mut commands, &app_status);
|
|
}
|
|
|
|
fn spawn_main_scene(commands: &mut Commands, assets: &ExampleAssets) {
|
|
commands.spawn(SceneRoot(assets.main_scene.clone()));
|
|
}
|
|
|
|
fn spawn_camera(commands: &mut Commands, assets: &ExampleAssets) {
|
|
commands.spawn((
|
|
Camera3d::default(),
|
|
Transform::from_xyz(-10.012, 4.8605, 13.281).looking_at(Vec3::ZERO, Vec3::Y),
|
|
Skybox {
|
|
image: assets.skybox.clone(),
|
|
brightness: 150.0,
|
|
..default()
|
|
},
|
|
));
|
|
}
|
|
|
|
fn spawn_irradiance_volume(commands: &mut Commands, assets: &ExampleAssets) {
|
|
commands
|
|
.spawn(SpatialBundle {
|
|
transform: Transform::from_matrix(VOXEL_FROM_WORLD),
|
|
..SpatialBundle::default()
|
|
})
|
|
.insert(IrradianceVolume {
|
|
voxels: assets.irradiance_volume.clone(),
|
|
intensity: IRRADIANCE_VOLUME_INTENSITY,
|
|
})
|
|
.insert(LightProbe);
|
|
}
|
|
|
|
fn spawn_light(commands: &mut Commands) {
|
|
commands.spawn((
|
|
PointLight {
|
|
intensity: 250000.0,
|
|
shadows_enabled: true,
|
|
..default()
|
|
},
|
|
Transform::from_xyz(4.0762, 5.9039, 1.0055),
|
|
));
|
|
}
|
|
|
|
fn spawn_sphere(commands: &mut Commands, assets: &ExampleAssets) {
|
|
commands
|
|
.spawn((
|
|
Mesh3d(assets.main_sphere.clone()),
|
|
MeshMaterial3d(assets.main_sphere_material.clone()),
|
|
Transform::from_xyz(0.0, SPHERE_SCALE, 0.0).with_scale(Vec3::splat(SPHERE_SCALE)),
|
|
))
|
|
.insert(MainObject);
|
|
}
|
|
|
|
fn spawn_voxel_cube_parent(commands: &mut Commands) {
|
|
commands
|
|
.spawn(SpatialBundle {
|
|
visibility: Visibility::Hidden,
|
|
..default()
|
|
})
|
|
.insert(VoxelCubeParent);
|
|
}
|
|
|
|
fn spawn_fox(commands: &mut Commands, assets: &ExampleAssets) {
|
|
commands.spawn((
|
|
SceneRoot(assets.fox.clone()),
|
|
Visibility::Hidden,
|
|
Transform::from_scale(Vec3::splat(FOX_SCALE)),
|
|
MainObject,
|
|
));
|
|
}
|
|
|
|
fn spawn_text(commands: &mut Commands, app_status: &AppStatus) {
|
|
commands.spawn(
|
|
TextBundle {
|
|
text: app_status.create_text(),
|
|
..default()
|
|
}
|
|
.with_style(Style {
|
|
position_type: PositionType::Absolute,
|
|
bottom: Val::Px(12.0),
|
|
left: Val::Px(12.0),
|
|
..default()
|
|
}),
|
|
);
|
|
}
|
|
|
|
// A system that updates the help text.
|
|
fn update_text(mut text_query: Query<&mut Text>, app_status: Res<AppStatus>) {
|
|
for mut text in text_query.iter_mut() {
|
|
*text = app_status.create_text();
|
|
}
|
|
}
|
|
|
|
impl AppStatus {
|
|
// Constructs the help text at the bottom of the screen based on the
|
|
// application status.
|
|
fn create_text(&self) -> Text {
|
|
let irradiance_volume_help_text = if self.irradiance_volume_present {
|
|
DISABLE_IRRADIANCE_VOLUME_HELP_TEXT
|
|
} else {
|
|
ENABLE_IRRADIANCE_VOLUME_HELP_TEXT
|
|
};
|
|
|
|
let voxels_help_text = if self.voxels_visible {
|
|
HIDE_VOXELS_HELP_TEXT
|
|
} else {
|
|
SHOW_VOXELS_HELP_TEXT
|
|
};
|
|
|
|
let rotation_help_text = if self.rotating {
|
|
STOP_ROTATION_HELP_TEXT
|
|
} else {
|
|
START_ROTATION_HELP_TEXT
|
|
};
|
|
|
|
let switch_mesh_help_text = match self.model {
|
|
ExampleModel::Sphere => SWITCH_TO_FOX_HELP_TEXT,
|
|
ExampleModel::Fox => SWITCH_TO_SPHERE_HELP_TEXT,
|
|
};
|
|
|
|
Text::from_section(
|
|
format!(
|
|
"{CLICK_TO_MOVE_HELP_TEXT}
|
|
{voxels_help_text}
|
|
{irradiance_volume_help_text}
|
|
{rotation_help_text}
|
|
{switch_mesh_help_text}"
|
|
),
|
|
TextStyle::default(),
|
|
)
|
|
}
|
|
}
|
|
|
|
// Rotates the camera a bit every frame.
|
|
fn rotate_camera(
|
|
mut camera_query: Query<&mut Transform, With<Camera3d>>,
|
|
time: Res<Time>,
|
|
app_status: Res<AppStatus>,
|
|
) {
|
|
if !app_status.rotating {
|
|
return;
|
|
}
|
|
|
|
for mut transform in camera_query.iter_mut() {
|
|
transform.translation = Vec2::from_angle(ROTATION_SPEED * time.delta_seconds())
|
|
.rotate(transform.translation.xz())
|
|
.extend(transform.translation.y)
|
|
.xzy();
|
|
transform.look_at(Vec3::ZERO, Vec3::Y);
|
|
}
|
|
}
|
|
|
|
// Toggles between the unskinned sphere model and the skinned fox model if the
|
|
// user requests it.
|
|
fn change_main_object(
|
|
keyboard: Res<ButtonInput<KeyCode>>,
|
|
mut app_status: ResMut<AppStatus>,
|
|
mut sphere_query: Query<&mut Visibility, (With<MainObject>, With<Mesh3d>, Without<SceneRoot>)>,
|
|
mut fox_query: Query<&mut Visibility, (With<MainObject>, With<SceneRoot>)>,
|
|
) {
|
|
if !keyboard.just_pressed(KeyCode::Tab) {
|
|
return;
|
|
}
|
|
let Some(mut sphere_visibility) = sphere_query.iter_mut().next() else {
|
|
return;
|
|
};
|
|
let Some(mut fox_visibility) = fox_query.iter_mut().next() else {
|
|
return;
|
|
};
|
|
|
|
match app_status.model {
|
|
ExampleModel::Sphere => {
|
|
*sphere_visibility = Visibility::Hidden;
|
|
*fox_visibility = Visibility::Visible;
|
|
app_status.model = ExampleModel::Fox;
|
|
}
|
|
ExampleModel::Fox => {
|
|
*sphere_visibility = Visibility::Visible;
|
|
*fox_visibility = Visibility::Hidden;
|
|
app_status.model = ExampleModel::Sphere;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Default for AppStatus {
|
|
fn default() -> Self {
|
|
Self {
|
|
irradiance_volume_present: true,
|
|
rotating: true,
|
|
model: ExampleModel::Sphere,
|
|
voxels_visible: false,
|
|
}
|
|
}
|
|
}
|
|
|
|
// Turns on and off the irradiance volume as requested by the user.
|
|
fn toggle_irradiance_volumes(
|
|
mut commands: Commands,
|
|
keyboard: Res<ButtonInput<KeyCode>>,
|
|
light_probe_query: Query<Entity, With<LightProbe>>,
|
|
mut app_status: ResMut<AppStatus>,
|
|
assets: Res<ExampleAssets>,
|
|
mut ambient_light: ResMut<AmbientLight>,
|
|
) {
|
|
if !keyboard.just_pressed(KeyCode::Space) {
|
|
return;
|
|
};
|
|
|
|
let Some(light_probe) = light_probe_query.iter().next() else {
|
|
return;
|
|
};
|
|
|
|
if app_status.irradiance_volume_present {
|
|
commands.entity(light_probe).remove::<IrradianceVolume>();
|
|
ambient_light.brightness = AMBIENT_LIGHT_BRIGHTNESS * IRRADIANCE_VOLUME_INTENSITY;
|
|
app_status.irradiance_volume_present = false;
|
|
} else {
|
|
commands.entity(light_probe).insert(IrradianceVolume {
|
|
voxels: assets.irradiance_volume.clone(),
|
|
intensity: IRRADIANCE_VOLUME_INTENSITY,
|
|
});
|
|
ambient_light.brightness = 0.0;
|
|
app_status.irradiance_volume_present = true;
|
|
}
|
|
}
|
|
|
|
fn toggle_rotation(keyboard: Res<ButtonInput<KeyCode>>, mut app_status: ResMut<AppStatus>) {
|
|
if keyboard.just_pressed(KeyCode::Enter) {
|
|
app_status.rotating = !app_status.rotating;
|
|
}
|
|
}
|
|
|
|
// Handles clicks on the plane that reposition the object.
|
|
fn handle_mouse_clicks(
|
|
buttons: Res<ButtonInput<MouseButton>>,
|
|
windows: Query<&Window, With<PrimaryWindow>>,
|
|
cameras: Query<(&Camera, &GlobalTransform)>,
|
|
mut main_objects: Query<&mut Transform, With<MainObject>>,
|
|
) {
|
|
if !buttons.pressed(MouseButton::Left) {
|
|
return;
|
|
}
|
|
let Some(mouse_position) = windows.iter().next().and_then(Window::cursor_position) else {
|
|
return;
|
|
};
|
|
let Some((camera, camera_transform)) = cameras.iter().next() else {
|
|
return;
|
|
};
|
|
|
|
// Figure out where the user clicked on the plane.
|
|
let Ok(ray) = camera.viewport_to_world(camera_transform, mouse_position) else {
|
|
return;
|
|
};
|
|
let Some(ray_distance) = ray.intersect_plane(Vec3::ZERO, InfinitePlane3d::new(Vec3::Y)) else {
|
|
return;
|
|
};
|
|
let plane_intersection = ray.origin + ray.direction.normalize() * ray_distance;
|
|
|
|
// Move all the main objeccts.
|
|
for mut transform in main_objects.iter_mut() {
|
|
transform.translation = vec3(
|
|
plane_intersection.x,
|
|
transform.translation.y,
|
|
plane_intersection.z,
|
|
);
|
|
}
|
|
}
|
|
|
|
impl FromWorld for ExampleAssets {
|
|
fn from_world(world: &mut World) -> Self {
|
|
let fox_animation =
|
|
world.load_asset(GltfAssetLabel::Animation(1).from_asset("models/animated/Fox.glb"));
|
|
let (fox_animation_graph, fox_animation_node) =
|
|
AnimationGraph::from_clip(fox_animation.clone());
|
|
|
|
ExampleAssets {
|
|
main_sphere: world.add_asset(Sphere::default().mesh().uv(32, 18)),
|
|
fox: world.load_asset(GltfAssetLabel::Scene(0).from_asset("models/animated/Fox.glb")),
|
|
main_sphere_material: world.add_asset(Color::from(SILVER)),
|
|
main_scene: world.load_asset(
|
|
GltfAssetLabel::Scene(0)
|
|
.from_asset("models/IrradianceVolumeExample/IrradianceVolumeExample.glb"),
|
|
),
|
|
irradiance_volume: world.load_asset("irradiance_volumes/Example.vxgi.ktx2"),
|
|
fox_animation_graph: world.add_asset(fox_animation_graph),
|
|
fox_animation_node,
|
|
voxel_cube: world.add_asset(Cuboid::default()),
|
|
// Just use a specular map for the skybox since it's not too blurry.
|
|
// In reality you wouldn't do this--you'd use a real skybox texture--but
|
|
// reusing the textures like this saves space in the Bevy repository.
|
|
skybox: world.load_asset("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
|
|
}
|
|
}
|
|
}
|
|
|
|
// Plays the animation on the fox.
|
|
fn play_animations(
|
|
mut commands: Commands,
|
|
assets: Res<ExampleAssets>,
|
|
mut players: Query<(Entity, &mut AnimationPlayer), Without<Handle<AnimationGraph>>>,
|
|
) {
|
|
for (entity, mut player) in players.iter_mut() {
|
|
commands
|
|
.entity(entity)
|
|
.insert(assets.fox_animation_graph.clone());
|
|
player.play(assets.fox_animation_node).repeat();
|
|
}
|
|
}
|
|
|
|
fn create_cubes(
|
|
image_assets: Res<Assets<Image>>,
|
|
mut commands: Commands,
|
|
irradiance_volumes: Query<(&IrradianceVolume, &GlobalTransform)>,
|
|
voxel_cube_parents: Query<Entity, With<VoxelCubeParent>>,
|
|
voxel_cubes: Query<Entity, With<VoxelCube>>,
|
|
example_assets: Res<ExampleAssets>,
|
|
mut voxel_visualization_material_assets: ResMut<Assets<VoxelVisualizationMaterial>>,
|
|
) {
|
|
// If voxel cubes have already been spawned, don't do anything.
|
|
if !voxel_cubes.is_empty() {
|
|
return;
|
|
}
|
|
|
|
let Some(voxel_cube_parent) = voxel_cube_parents.iter().next() else {
|
|
return;
|
|
};
|
|
|
|
for (irradiance_volume, global_transform) in irradiance_volumes.iter() {
|
|
let Some(image) = image_assets.get(&irradiance_volume.voxels) else {
|
|
continue;
|
|
};
|
|
|
|
let resolution = image.texture_descriptor.size;
|
|
|
|
let voxel_cube_material = voxel_visualization_material_assets.add(ExtendedMaterial {
|
|
base: StandardMaterial::from(Color::from(RED)),
|
|
extension: VoxelVisualizationExtension {
|
|
irradiance_volume_info: VoxelVisualizationIrradianceVolumeInfo {
|
|
world_from_voxel: VOXEL_FROM_WORLD.inverse(),
|
|
voxel_from_world: VOXEL_FROM_WORLD,
|
|
resolution: uvec3(
|
|
resolution.width,
|
|
resolution.height,
|
|
resolution.depth_or_array_layers,
|
|
),
|
|
intensity: IRRADIANCE_VOLUME_INTENSITY,
|
|
},
|
|
},
|
|
});
|
|
|
|
let scale = vec3(
|
|
1.0 / resolution.width as f32,
|
|
1.0 / resolution.height as f32,
|
|
1.0 / resolution.depth_or_array_layers as f32,
|
|
);
|
|
|
|
// Spawn a cube for each voxel.
|
|
for z in 0..resolution.depth_or_array_layers {
|
|
for y in 0..resolution.height {
|
|
for x in 0..resolution.width {
|
|
let uvw = (uvec3(x, y, z).as_vec3() + 0.5) * scale - 0.5;
|
|
let pos = global_transform.transform_point(uvw);
|
|
let voxel_cube = commands
|
|
.spawn((
|
|
Mesh3d(example_assets.voxel_cube.clone()),
|
|
MeshMaterial3d(voxel_cube_material.clone()),
|
|
Transform::from_scale(Vec3::splat(VOXEL_CUBE_SCALE))
|
|
.with_translation(pos),
|
|
))
|
|
.insert(VoxelCube)
|
|
.insert(NotShadowCaster)
|
|
.id();
|
|
|
|
commands.entity(voxel_cube_parent).add_child(voxel_cube);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Draws a gizmo showing the bounds of the irradiance volume.
|
|
fn draw_gizmo(
|
|
mut gizmos: Gizmos,
|
|
irradiance_volume_query: Query<&GlobalTransform, With<IrradianceVolume>>,
|
|
app_status: Res<AppStatus>,
|
|
) {
|
|
if app_status.voxels_visible {
|
|
for transform in irradiance_volume_query.iter() {
|
|
gizmos.cuboid(*transform, GIZMO_COLOR);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Handles a request from the user to toggle the voxel visibility on and off.
|
|
fn toggle_voxel_visibility(
|
|
keyboard: Res<ButtonInput<KeyCode>>,
|
|
mut app_status: ResMut<AppStatus>,
|
|
mut voxel_cube_parent_query: Query<&mut Visibility, With<VoxelCubeParent>>,
|
|
) {
|
|
if !keyboard.just_pressed(KeyCode::Backspace) {
|
|
return;
|
|
}
|
|
|
|
app_status.voxels_visible = !app_status.voxels_visible;
|
|
|
|
for mut visibility in voxel_cube_parent_query.iter_mut() {
|
|
*visibility = if app_status.voxels_visible {
|
|
Visibility::Visible
|
|
} else {
|
|
Visibility::Hidden
|
|
};
|
|
}
|
|
}
|
|
|
|
impl MaterialExtension for VoxelVisualizationExtension {
|
|
fn fragment_shader() -> ShaderRef {
|
|
SHADER_ASSET_PATH.into()
|
|
}
|
|
}
|