Next.js Flare

Next.js logo shader — a rim-lit N glyph with volumetric scattering: a 48-step ray walk jittered by blue noise over a separable Gaussian blur chain, breathing autonomously until the pointer takes over.

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index.tsx renderer.ts pipeline.ts uniforms.ts settings.ts animation.ts blur-kernel.ts textures.ts logo-raster.ts fullscreen.ts logo.wgsl rim.wgsl blur.wgsl composite.wgsl

const MAX_TAPS: u32 = 8u;
 
struct Params {
  direction: vec2f,
  texelSize: vec2f,
  taps: array<vec4f, 8>,
  centerWeight: f32,
  tapCount: u32,
}
@group(0) @binding(0) var linearSampler: sampler;
@group(0) @binding(1) var sourceTexture: texture_2d<f32>;
@group(0) @binding(2) var<uniform> params: Params;
 
fn sampleClamped(uv: vec2f) -> vec3f {
  let halfTexel = params.texelSize * 0.5;
  return textureSample(sourceTexture, linearSampler, clamp(uv, halfTexel, vec2f(1.0) - halfTexel)).rgb;
}
 
@fragment fn fs_main(@location(0) uv: vec2f) -> @location(0) vec4f {
  var color = sampleClamped(uv) * params.centerWeight;
  for (var index = 0u; index < MAX_TAPS; index += 1u) {
    if (index >= params.tapCount) {
      break;
    }
    let tap = params.taps[index];
    color += sampleClamped(uv + params.direction * tap.x) * tap.y;
    color += sampleClamped(uv - params.direction * tap.x) * tap.y;
  }
  return vec4f(color, 1.0);
}