windjammer 0.48.0

A simple language inspired by Go, Ruby, and Elixir that transpiles to Rust - 80% of Rust's power with 20% of the complexity
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

// pbr.wjsl - Simple PBR fragment shader (WJSL RFC syntax)
// Compiles with: wj build examples/pbr.wjsl --target wgsl -o shaders/

struct Material {
    base_color: vec4,
    metallic: f32,
    roughness: f32,
    ao: f32,
    emissive: vec3,
}

struct Light {
    position: vec3,
    color: vec3,
    intensity: f32,
}

struct CameraUniforms {
    view_matrix: mat4x4,
    proj_matrix: mat4x4,
    position: vec3,
    screen_size: vec2,
    near_plane: f32,
    far_plane: f32,
}

@group(0) @binding(0) uniform material: Material;
@group(0) @binding(1) uniform camera: CameraUniforms;
@group(0) @binding(2) uniform light: Light;

fn pbr_lighting(albedo: vec3, metallic: f32, roughness: f32, ao: f32,
                n: vec3, v: vec3, l: vec3, radiance: vec3) -> vec3 {
    let h = normalize(v + l);
    var f0 = vec3(0.04);
    f0 = mix(f0, albedo, metallic);
    let n_dot_l = max(dot(n, l), 0.0);
    let n_dot_v = max(dot(n, v), 0.0);
    let diffuse = (vec3(1.0) - f0) * (1.0 - metallic) * albedo / 3.14159265;
    return diffuse * radiance * n_dot_l * ao;
}

@fragment
fn main(
    @location(0) world_pos: vec3,
    @location(1) normal: vec3,
    @location(2) uv: vec2
) -> @location(0) vec4 {
    let n = normalize(normal);
    let v = normalize(camera.position - world_pos);
    let l = normalize(light.position - world_pos);
    let dist = length(light.position - world_pos);
    let attenuation = 1.0 / (dist * dist);
    let radiance = light.color * light.intensity * attenuation;
    let albedo = material.base_color.rgb;
    let lit = pbr_lighting(albedo, material.metallic, material.roughness,
                          material.ao, n, v, l, radiance);
    let ambient = vec3(0.03) * albedo * material.ao;
    return vec4(lit + ambient + material.emissive, material.base_color.a);
}