bevy/src/render/light.rs

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Rust
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use crate::{math, prelude::Translation, render::camera};
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use std::ops::Range;
use zerocopy::{AsBytes, FromBytes};
pub struct Light {
pub color: wgpu::Color,
pub fov: f32,
pub depth: Range<f32>,
pub target_view: Option<wgpu::TextureView>,
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}
#[repr(C)]
#[derive(Clone, Copy, AsBytes, FromBytes)]
pub struct LightRaw {
pub proj: [[f32; 4]; 4],
pub pos: [f32; 4],
pub color: [f32; 4],
}
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impl LightRaw {
pub fn from(light: &Light, transform: &math::Mat4, translation: &Translation) -> LightRaw {
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let proj = camera::get_perspective_projection_matrix(
light.fov,
1.0,
light.depth.start,
light.depth.end,
) * *transform;
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let (x, y, z) = translation.0.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: [
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light.color.r as f32,
light.color.g as f32,
light.color.b as f32,
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1.0,
],
}
}
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}