dc9b486650
# Objective Fix https://github.com/bevyengine/bevy/issues/11577. ## Solution Fix the examples, add a few constants to make setting light values easier, and change the default lighting settings to be more realistic. (Now designed for an overcast day instead of an indoor environment) --- I did not include any example-related changes in here. ## Changelogs (not including breaking changes) ### bevy_pbr - Added `light_consts` module (included in prelude), which contains common lux and lumen values for lights. - Added `AmbientLight::NONE` constant, which is an ambient light with a brightness of 0. - Added non-EV100 variants for `ExposureSettings`'s EV100 constants, which allow easier construction of an `ExposureSettings` from a EV100 constant. ## Breaking changes ### bevy_pbr The several default lighting values were changed: - `PointLight`'s default `intensity` is now `2000.0` - `SpotLight`'s default `intensity` is now `2000.0` - `DirectionalLight`'s default `illuminance` is now `light_consts::lux::OVERCAST_DAY` (`1000.`) - `AmbientLight`'s default `brightness` is now `20.0`
72 lines
2.2 KiB
Rust
72 lines
2.2 KiB
Rust
//! Demonstrates how lighting is affected by different radius of point lights.
|
|
|
|
use bevy::prelude::*;
|
|
|
|
fn main() {
|
|
App::new()
|
|
.insert_resource(AmbientLight::NONE)
|
|
.add_plugins(DefaultPlugins)
|
|
.add_systems(Startup, setup)
|
|
.run();
|
|
}
|
|
|
|
fn setup(
|
|
mut commands: Commands,
|
|
mut meshes: ResMut<Assets<Mesh>>,
|
|
mut materials: ResMut<Assets<StandardMaterial>>,
|
|
) {
|
|
// camera
|
|
commands.spawn((Camera3dBundle {
|
|
transform: Transform::from_xyz(0.2, 1.5, 2.5).looking_at(Vec3::ZERO, Vec3::Y),
|
|
..default()
|
|
},));
|
|
|
|
// plane
|
|
commands.spawn(PbrBundle {
|
|
mesh: meshes.add(Plane3d::default().mesh().size(100.0, 100.0)),
|
|
material: materials.add(StandardMaterial {
|
|
base_color: Color::rgb(0.2, 0.2, 0.2),
|
|
perceptual_roughness: 0.08,
|
|
..default()
|
|
}),
|
|
..default()
|
|
});
|
|
|
|
const COUNT: usize = 6;
|
|
let position_range = -2.0..2.0;
|
|
let radius_range = 0.0..0.4;
|
|
let pos_len = position_range.end - position_range.start;
|
|
let radius_len = radius_range.end - radius_range.start;
|
|
let mesh = meshes.add(Sphere::new(0.5).mesh().uv(120, 64));
|
|
|
|
for i in 0..COUNT {
|
|
let percent = i as f32 / COUNT as f32;
|
|
let radius = radius_range.start + percent * radius_len;
|
|
|
|
// sphere light
|
|
commands
|
|
.spawn(PbrBundle {
|
|
mesh: mesh.clone(),
|
|
material: materials.add(StandardMaterial {
|
|
base_color: Color::rgb(0.5, 0.5, 1.0),
|
|
unlit: true,
|
|
..default()
|
|
}),
|
|
transform: Transform::from_xyz(position_range.start + percent * pos_len, 0.3, 0.0)
|
|
.with_scale(Vec3::splat(radius)),
|
|
..default()
|
|
})
|
|
.with_children(|children| {
|
|
children.spawn(PointLightBundle {
|
|
point_light: PointLight {
|
|
intensity: 4000.0,
|
|
radius,
|
|
color: Color::rgb(0.2, 0.2, 1.0),
|
|
..default()
|
|
},
|
|
..default()
|
|
});
|
|
});
|
|
}
|
|
}
|