Morphing SDF Glyph

A canvas and a module script, nothing to install. Set canvas.dataset.tps from your stream, or call canvas.token() once per token.

<canvas id="shader-morphing-sdf-glyph" data-tps="150" data-color="#ff8a4c" style="display:block;width:100%;height:240px;border-radius:12px"></canvas>
<script type="module">
  // Set canvas.dataset.tps from your stream, or call canvas.token() per token.
  const canvas = document.getElementById("shader-morphing-sdf-glyph");
  const gl = canvas.getContext("webgl2", { alpha: false, antialias: false });
  const fragment = `#version 300 es
precision highp float;
uniform vec3 iResolution;
uniform float iTime;
uniform float uTokens;
uniform float uTps;
uniform vec3 uColor;
out vec4 outColor;
#define TAU 6.28318530718
float hash11(float p) { p = fract(p * 0.1031); p *= p + 33.33; p *= p + p; return fract(p); }
float hash12(vec2 p) { vec3 q = fract(vec3(p.xyx) * 0.1031); q += dot(q, q.yzx + 33.33); return fract((q.x + q.y) * q.z); }
// the accent, lifted so a dark pick still glows
vec3 accent() { return uColor / max(0.25, max(uColor.r, max(uColor.g, uColor.b))); }
// rotate a colour's hue around the grey axis, for a companion tone
vec3 hueRot(vec3 c, float a) {
  const vec3 k = vec3(0.57735027);
  float ca = cos(a);
  return max(c * ca + cross(k, c) * sin(a) + k * dot(k, c) * (1.0 - ca), 0.0);
}
// 0 at rest, toward 1 as the stream speeds up
float energy() { return 1.0 - exp(-max(uTps, 0.0) / 90.0); }
vec3 stage(vec2 uv) { return vec3(0.008, 0.009, 0.013) + accent() * 0.016 * exp(-dot(uv, uv) * 2.2); }
// soft shoulder so hot cores bloom toward white, plus a dither against banding
vec4 finish(vec3 c, vec2 fc) {
  c = 1.0 - exp(-max(c, 0.0) * 1.35);
  c += (hash12(fc) + hash12(fc + 17.13) - 1.0) / 255.0;
  return vec4(c, 1.0);
}

float sdRBox(vec2 p, vec2 b, float r) {
  vec2 q = abs(p) - b + r;
  return length(max(q, 0.0)) + min(max(q.x, q.y), 0.0) - r;
}
float sdStar5(vec2 p, float r, float rf) {
  const vec2 k1 = vec2(0.809016994375, -0.587785252292);
  const vec2 k2 = vec2(-k1.x, k1.y);
  p.x = abs(p.x);
  p -= 2.0 * max(dot(k1, p), 0.0) * k1;
  p -= 2.0 * max(dot(k2, p), 0.0) * k2;
  p.x = abs(p.x);
  p.y -= r;
  vec2 ba = rf * vec2(-k1.y, k1.x) - vec2(0.0, 1.0);
  float h = clamp(dot(p, ba) / dot(ba, ba), 0.0, r);
  return length(p - ba * h) * sign(p.y * ba.x - p.x * ba.y);
}
// circle, rounded square, star, and back, holding a beat on each
float shape(vec2 p, float m) {
  float seg = floor(m);
  float t = smoothstep(0.2, 0.8, fract(m));
  float c = length(p) - 0.25;
  float b = sdRBox(p, vec2(0.205), 0.07);
  float s = sdStar5(p, 0.3, 0.5) - 0.025;
  float d0 = seg < 0.5 ? c : (seg < 1.5 ? b : s);
  float d1 = seg < 0.5 ? b : (seg < 1.5 ? s : c);
  return mix(d0, d1, t);
}
mat2 rot(float a) { float c = cos(a), s = sin(a); return mat2(c, -s, s, c); }

void mainImage(out vec4 fragColor, in vec2 fragCoord) {
  vec2 uv = (fragCoord - 0.5 * iResolution.xy) / iResolution.y;
  float px = 1.0 / iResolution.y;
  float e = energy();
  vec3 A = accent();
  vec3 B = hueRot(A, -1.0);
  vec3 col = stage(uv);

  float m = mod(uTokens * 0.002 + iTime * 0.06, 3.0);
  float spin = mod(uTokens * 0.0008 + iTime * 0.04, TAU);
  float breath = 1.0 + (0.015 + 0.05 * e) * sin(mod(iTime * 2.4, TAU));
  const float Z = 1.18;
  vec2 p = rot(spin) * uv / (breath * Z);
  float d = shape(p, m) * breath * Z;

  // echoes: earlier forms of the shape, larger and fainter
  for (int j = 1; j <= 4; j++) {
    float fj = float(j);
    float sc = 1.0 + fj * (0.12 + 0.08 * e);
    float mj = mod(m - fj * 0.07, 3.0);
    vec2 q = rot(spin - fj * 0.05) * uv / (sc * breath * Z);
    float dj = shape(q, mj) * sc * breath * Z;
    float fade = (1.0 - fj / 5.0);
    col += mix(B, A, fj / 4.0) * (smoothstep(px * 1.2, 0.0, abs(dj)) * 0.5 + exp(-abs(dj) * 60.0) * 0.12) * fade * fade * (0.4 + 0.6 * e);
  }

  float inside = smoothstep(px, -px, d);
  // contour bands that flow inward with the tokens
  float bp = fract(uTokens * 0.016 + iTime * 0.12);
  float bc = -d / 0.028 + bp;
  float band = abs(fract(bc + 0.5) - 0.5);
  float bw = fwidth(bc);
  float lines = smoothstep(0.06 + bw, 0.06, band);
  float depth = clamp(-d / 0.25, 0.0, 1.0);
  vec3 fill = A * (0.08 + 0.1 * (1.0 - depth)) + mix(A, B, depth) * lines * (1.0 - depth) * (0.25 + 0.35 * e);
  col = mix(col, fill, inside);
  // the outline, with bloom
  col += mix(A, vec3(1.0), 0.55) * smoothstep(0.003 + px, 0.003 - px * 0.5, abs(d));
  col += A * (exp(-abs(d) * 50.0) * 0.35 + exp(-max(d, 0.0) * 9.0) * 0.12) * (0.6 + 0.6 * e);
  fragColor = finish(col, fragCoord);
}

void main() {
  mainImage(outColor, gl_FragCoord.xy);
  outColor.a = 1.0;
}
`;
  const vertex = `#version 300 es
void main() {
  vec2 p = vec2((gl_VertexID << 1) & 2, gl_VertexID & 2);
  gl_Position = vec4(p * 2.0 - 1.0, 0.0, 1.0);
}
`;
  const compile = (type, src) => {
    const s = gl.createShader(type);
    gl.shaderSource(s, src);
    gl.compileShader(s);
    if (!gl.getShaderParameter(s, gl.COMPILE_STATUS)) throw new Error(gl.getShaderInfoLog(s));
    return s;
  };
  const program = gl.createProgram();
  gl.attachShader(program, compile(gl.VERTEX_SHADER, vertex));
  gl.attachShader(program, compile(gl.FRAGMENT_SHADER, fragment));
  gl.linkProgram(program);
  gl.useProgram(program);
  const u = (n) => gl.getUniformLocation(program, n);
  const [res, time, tokens, rate, color] = ["iResolution", "iTime", "uTokens", "uTps", "uColor"].map(u);
  const hex = parseInt((canvas.dataset.color || "#7c5cff").slice(1), 16);
  gl.uniform3f(color, ((hex >> 16) & 255) / 255, ((hex >> 8) & 255) / 255, (hex & 255) / 255);

  // canvas.token(): count real tokens and derive the rate from the last second.
  const stamps = [];
  canvas.token = () => {
    stamps.push(performance.now());
    canvas.dataset.tps = "auto";
  };
  const still = matchMedia("(prefers-reduced-motion: reduce)").matches;
  let count = 0, last = performance.now(), visible = true, frame = 0;
  new IntersectionObserver(([e]) => {
    visible = e.isIntersecting;
    if (visible && !frame) frame = requestAnimationFrame(draw);
  }).observe(canvas);

  function draw(now) {
    frame = 0;
    const dt = Math.min((now - last) / 1000, 0.1);
    last = now;
    while (stamps.length && now - stamps[0] > 1000) stamps.shift();
    const wobble = 1 + 0.25 * Math.sin(now / 588) + 0.15 * Math.sin(now / 233 + 1) + 0.08 * Math.sin(now / 91 + 2);
    const tps = canvas.dataset.tps === "auto" ? stamps.length : Number(canvas.dataset.tps) * wobble;
    count += tps * dt;
    const dpr = Math.min(devicePixelRatio || 1, 2);
    const w = Math.round(canvas.clientWidth * dpr), h = Math.round(canvas.clientHeight * dpr);
    if (canvas.width !== w || canvas.height !== h) { canvas.width = w; canvas.height = h; }
    gl.viewport(0, 0, w, h);
    gl.uniform3f(res, w, h, 1);
    gl.uniform1f(time, still ? 2 : now / 1000);
    gl.uniform1f(tokens, still ? Number(canvas.dataset.tps) * 2 : count);
    gl.uniform1f(rate, tps);
    gl.drawArrays(gl.TRIANGLES, 0, 3);
    if (visible && !still) frame = requestAnimationFrame(draw);
  }
  frame = requestAnimationFrame(draw);
</script>

// Inputs the site passes in, as constants for Shadertoy.
// uTps: tokens per second. uTokens: tokens so far. uColor: the accent.
#define uTps 150.0
#define uTokens (iTime * uTps)
#define uColor vec3(1.000, 0.541, 0.298)

#define TAU 6.28318530718
float hash11(float p) { p = fract(p * 0.1031); p *= p + 33.33; p *= p + p; return fract(p); }
float hash12(vec2 p) { vec3 q = fract(vec3(p.xyx) * 0.1031); q += dot(q, q.yzx + 33.33); return fract((q.x + q.y) * q.z); }
// the accent, lifted so a dark pick still glows
vec3 accent() { return uColor / max(0.25, max(uColor.r, max(uColor.g, uColor.b))); }
// rotate a colour's hue around the grey axis, for a companion tone
vec3 hueRot(vec3 c, float a) {
  const vec3 k = vec3(0.57735027);
  float ca = cos(a);
  return max(c * ca + cross(k, c) * sin(a) + k * dot(k, c) * (1.0 - ca), 0.0);
}
// 0 at rest, toward 1 as the stream speeds up
float energy() { return 1.0 - exp(-max(uTps, 0.0) / 90.0); }
vec3 stage(vec2 uv) { return vec3(0.008, 0.009, 0.013) + accent() * 0.016 * exp(-dot(uv, uv) * 2.2); }
// soft shoulder so hot cores bloom toward white, plus a dither against banding
vec4 finish(vec3 c, vec2 fc) {
  c = 1.0 - exp(-max(c, 0.0) * 1.35);
  c += (hash12(fc) + hash12(fc + 17.13) - 1.0) / 255.0;
  return vec4(c, 1.0);
}

float sdRBox(vec2 p, vec2 b, float r) {
  vec2 q = abs(p) - b + r;
  return length(max(q, 0.0)) + min(max(q.x, q.y), 0.0) - r;
}
float sdStar5(vec2 p, float r, float rf) {
  const vec2 k1 = vec2(0.809016994375, -0.587785252292);
  const vec2 k2 = vec2(-k1.x, k1.y);
  p.x = abs(p.x);
  p -= 2.0 * max(dot(k1, p), 0.0) * k1;
  p -= 2.0 * max(dot(k2, p), 0.0) * k2;
  p.x = abs(p.x);
  p.y -= r;
  vec2 ba = rf * vec2(-k1.y, k1.x) - vec2(0.0, 1.0);
  float h = clamp(dot(p, ba) / dot(ba, ba), 0.0, r);
  return length(p - ba * h) * sign(p.y * ba.x - p.x * ba.y);
}
// circle, rounded square, star, and back, holding a beat on each
float shape(vec2 p, float m) {
  float seg = floor(m);
  float t = smoothstep(0.2, 0.8, fract(m));
  float c = length(p) - 0.25;
  float b = sdRBox(p, vec2(0.205), 0.07);
  float s = sdStar5(p, 0.3, 0.5) - 0.025;
  float d0 = seg < 0.5 ? c : (seg < 1.5 ? b : s);
  float d1 = seg < 0.5 ? b : (seg < 1.5 ? s : c);
  return mix(d0, d1, t);
}
mat2 rot(float a) { float c = cos(a), s = sin(a); return mat2(c, -s, s, c); }

void mainImage(out vec4 fragColor, in vec2 fragCoord) {
  vec2 uv = (fragCoord - 0.5 * iResolution.xy) / iResolution.y;
  float px = 1.0 / iResolution.y;
  float e = energy();
  vec3 A = accent();
  vec3 B = hueRot(A, -1.0);
  vec3 col = stage(uv);

  float m = mod(uTokens * 0.002 + iTime * 0.06, 3.0);
  float spin = mod(uTokens * 0.0008 + iTime * 0.04, TAU);
  float breath = 1.0 + (0.015 + 0.05 * e) * sin(mod(iTime * 2.4, TAU));
  const float Z = 1.18;
  vec2 p = rot(spin) * uv / (breath * Z);
  float d = shape(p, m) * breath * Z;

  // echoes: earlier forms of the shape, larger and fainter
  for (int j = 1; j <= 4; j++) {
    float fj = float(j);
    float sc = 1.0 + fj * (0.12 + 0.08 * e);
    float mj = mod(m - fj * 0.07, 3.0);
    vec2 q = rot(spin - fj * 0.05) * uv / (sc * breath * Z);
    float dj = shape(q, mj) * sc * breath * Z;
    float fade = (1.0 - fj / 5.0);
    col += mix(B, A, fj / 4.0) * (smoothstep(px * 1.2, 0.0, abs(dj)) * 0.5 + exp(-abs(dj) * 60.0) * 0.12) * fade * fade * (0.4 + 0.6 * e);
  }

  float inside = smoothstep(px, -px, d);
  // contour bands that flow inward with the tokens
  float bp = fract(uTokens * 0.016 + iTime * 0.12);
  float bc = -d / 0.028 + bp;
  float band = abs(fract(bc + 0.5) - 0.5);
  float bw = fwidth(bc);
  float lines = smoothstep(0.06 + bw, 0.06, band);
  float depth = clamp(-d / 0.25, 0.0, 1.0);
  vec3 fill = A * (0.08 + 0.1 * (1.0 - depth)) + mix(A, B, depth) * lines * (1.0 - depth) * (0.25 + 0.35 * e);
  col = mix(col, fill, inside);
  // the outline, with bloom
  col += mix(A, vec3(1.0), 0.55) * smoothstep(0.003 + px, 0.003 - px * 0.5, abs(d));
  col += A * (exp(-abs(d) * 50.0) * 0.35 + exp(-max(d, 0.0) * 9.0) * 0.12) * (0.6 + 0.6 * e);
  fragColor = finish(col, fragCoord);
}

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