bevy/crates/bevy_pbr/src/light.rs

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use bevy_core::Byteable;
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use bevy_property::Properties;
use bevy_render::{
camera::{CameraProjection, PerspectiveProjection},
color::Color,
};
use bevy_transform::components::GlobalTransform;
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use std::ops::Range;
/// A point light
#[derive(Debug, Properties)]
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pub struct Light {
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pub color: Color,
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pub fov: f32,
pub depth: Range<f32>,
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}
impl Default for Light {
fn default() -> Self {
Light {
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color: Color::rgb(1.0, 1.0, 1.0),
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depth: 0.1..50.0,
fov: f32::to_radians(60.0),
}
}
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}
#[repr(C)]
#[derive(Debug, Clone, Copy)]
pub(crate) struct LightRaw {
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pub proj: [[f32; 4]; 4],
pub pos: [f32; 4],
pub color: [f32; 4],
}
unsafe impl Byteable for LightRaw {}
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impl LightRaw {
pub fn from(light: &Light, global_transform: &GlobalTransform) -> LightRaw {
let perspective = PerspectiveProjection {
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fov: light.fov,
aspect_ratio: 1.0,
near: light.depth.start,
far: light.depth.end,
};
let proj = perspective.get_projection_matrix() * global_transform.compute_matrix();
let (x, y, z) = global_transform.translation.into();
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LightRaw {
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proj: proj.to_cols_array_2d(),
pos: [x, y, z, 1.0],
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color: light.color.into(),
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}
}
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}