geodesic-wallpaper 1.6.1

Animated Windows desktop wallpaper that draws glowing geodesics flowing over curved 3D surfaces (torus, Klein bottle, pseudosphere and more), rendered with wgpu. Also renders PNGs and GIFs headless.
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struct Uniforms {
    view_proj: mat4x4<f32>,
    light_dir: vec4<f32>,
    time: f32,
    // Three scalars, not vec3: a vec3 would align to 16 bytes and make the
    // struct 112 bytes, while the Rust `Uniforms` is 96.
    _pad0: f32,
    _pad1: f32,
    _pad2: f32,
}

@group(0) @binding(0)
var<uniform> uniforms: Uniforms;

struct VertexInput {
    @location(0) position: vec3<f32>,
    @location(1) color: vec4<f32>,
}

struct VertexOutput {
    @builtin(position) clip_position: vec4<f32>,
    @location(0) color: vec4<f32>,
}

@vertex
fn vs_main(in: VertexInput) -> VertexOutput {
    var out: VertexOutput;
    out.clip_position = uniforms.view_proj * vec4<f32>(in.position, 1.0);
    out.color = in.color;
    return out;
}

@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
    // Additive-style glow: boost brightness at high alpha
    let c = in.color;
    let glow = c.rgb * (0.6 + 0.4 * c.a);
    return vec4<f32>(glow, c.a);
}