1 unstable release
0.0.1 | Dec 23, 2023 |
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#36 in #wgsl
63KB
1.5K
SLoC
A crate to generate WGSL text from rust code.
When to use
- When you want to compose multiple WGSL pieces into one WGSL text, so that you can generate shader module from it.
- When you want to modify WGSL piece such as deletion.
Example
// ref: https://www.w3.org/TR/WGSL/
use my_wgsl::*;
#[wgsl_decl_struct]
struct PointLight {
position: vec3f,
color: vec3f,
}
#[wgsl_decl_struct]
struct LightStorage {
pointCount: u32,
point: array<PointLight>,
}
fn foo() {
let mut builder = Builder::new();
wgsl_structs![builder, PointLight, LightStorage];
wgsl_bind!(
builder, group(0) binding(0) var<storage> lights : LightStorage
);
wgsl_bind!(
builder, group(1) binding(0) var baseColorSampler : sampler
);
wgsl_bind!(
builder, group(1) binding(1) var baseColorTexture : texture_2d<f32>
);
wgsl_fn!(builder,
#[fragment]
fn fragmentMain(#[location(0)] worldPos : vec3f,
#[location(1)] normal : vec3f,
#[location(2)] uv : vec2f) -> #[location(0)] vec4f {
// Sample the base color of the surface from a texture.
let baseColor = textureSample(baseColorTexture, baseColorSampler, uv);
let N = normalize(normal);
var surfaceColor = vec3f(0);
// Loop over the scene point lights.
for (var i = 0u; i < lights.pointCount; ++i) {
let worldToLight = lights.point[i].position - worldPos;
let dist = length(worldToLight);
let dir = normalize(worldToLight);
// Determine the contribution of this light to the surface color.
let radiance = lights.point[i].color * (1 / pow(dist, 2));
let nDotL = max(dot(N, dir), 0);
// Accumulate light contribution to the surface color.
surfaceColor += baseColor.rgb * radiance * nDotL;
}
// Return the accumulated surface color.
return vec4(surfaceColor, baseColor.a);
}
);
let wgsl: String = builder.build();
// You can use `wgsl` to make shader module.
}
Dependencies
~290–770KB
~18K SLoC