programmatic-patterns/glass-flame.html at main · adly42/programmatic-patterns · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Glass Flame</title>
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: #080508;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  padding: 16px;
  gap: 14px;
  overflow-y: auto;
}

canvas {
  display: block;
  border-radius: 8px;
  width: min(calc(100vw - 32px), calc((100vh - 220px) * 16 / 9));
  aspect-ratio: 16 / 9;
  flex-shrink: 0;
}

.panel {
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: 14px;
  padding: 13px 16px;
  width: min(calc(100vw - 32px), 640px);
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lbl {
  font-size: 11px;
  color: rgba(255,255,255,0.35);
  width: 72px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input[type=range] {
  flex: 1;
  accent-color: rgba(255,255,255,0.55);
  cursor: pointer;
  height: 3px;
}

.val {
  font-size: 11px;
  color: rgba(255,255,255,0.45);
  font-variant-numeric: tabular-nums;
  min-width: 30px;
  text-align: right;
}

.seg {
  display: flex;
  gap: 1px;
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
  padding: 3px;
}

.seg button {
  background: none;
  border: none;
  color: rgba(255,255,255,0.35);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.12s;
  white-space: nowrap;
}

.seg button.active {
  background: rgba(255,255,255,0.13);
  color: rgba(255,255,255,0.85);
}

.seg button:hover:not(.active) { color: rgba(255,255,255,0.6); }

.btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 1px;
}

.btns button {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.09);
  color: rgba(255,255,255,0.65);
  padding: 5px 13px;
  border-radius: 7px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.12s;
}

.btns button:hover { background: rgba(255,255,255,0.12); color: rgba(255,255,255,0.9); }
.btns button.rec   { background: #ff3b30; border-color: #ff3b30; color: #fff; }

input[type=color] {
  -webkit-appearance: none;
  appearance: none;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 7px;
  padding: 2px;
  cursor: pointer;
  background: none;
  flex-shrink: 0;
}
input[type=color]::-webkit-color-swatch-wrapper { padding: 0; }
input[type=color]::-webkit-color-swatch {
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 6px;
}

.top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.title {
  font-size: 11px;
  color: rgba(255,255,255,0.28);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hr { height: 1px; background: rgba(255,255,255,0.07); margin: 1px 0; }
</style>
</head>
<body>

<canvas id="c"></canvas>

<div class="panel">
  <div class="top-row">
    <span class="title">Glass Flame</span>
  </div>

  <div class="hr"></div>

  <div class="row">
    <span class="lbl">Shadow</span>
    <input type="color" id="cShadow" value="#3d0808">
    <span class="lbl" style="width:auto;padding-left:10px">Core</span>
    <input type="color" id="cCore" value="#ff5800">
  </div>

  <div class="row">
    <span class="lbl">Warp</span>
    <input type="range" id="sWarp" min="0" max="2" value="1" step="0.05">
    <span class="val" id="vWarp">1.00</span>
  </div>
  <div class="row">
    <span class="lbl">Speed</span>
    <input type="range" id="sSpeed" min="0" max="2" value="0.7" step="0.05">
    <span class="val" id="vSpeed">0.70</span>
  </div>
  <div class="row">
    <span class="lbl">Glass</span>
    <input type="range" id="sGlass" min="0" max="1" value="0.55" step="0.02">
    <span class="val" id="vGlass">0.55</span>
  </div>

  <div class="hr"></div>

  <div class="btns">
    <button id="btnPlay" onclick="togglePlay()">⏸ Pause</button>
    <button onclick="savePng()">↓ PNG</button>
    <button id="btnRec" onclick="toggleRecord()">⏺ Record</button>
  </div>
</div>

<script>
const canvas = document.getElementById('c');
const gl = canvas.getContext('webgl2', { preserveDrawingBuffer: true });
if (!gl) {
  document.body.innerHTML = '<p style="color:#fff;padding:40px;font-family:sans-serif">WebGL2 is required.</p>';
}

let playing = true, elapsed = 0, lastTs = null;
let mediaRecorder = null, recordChunks = [];

function hexToRgb(hex) {
  return [
    parseInt(hex.slice(1,3),16)/255,
    parseInt(hex.slice(3,5),16)/255,
    parseInt(hex.slice(5,7),16)/255
  ];
}

const DPR = Math.min(devicePixelRatio, 2);
canvas.width  = 1280;
canvas.height = 720;
gl.viewport(0, 0, 1280, 720);

function resizeCanvas() {
  const w = Math.round(canvas.clientWidth  * DPR);
  const h = Math.round(canvas.clientHeight * DPR);
  if (w > 0 && h > 0 && (canvas.width !== w || canvas.height !== h)) {
    canvas.width  = w;
    canvas.height = h;
    gl.viewport(0, 0, w, h);
  }
}
new ResizeObserver(resizeCanvas).observe(canvas);
resizeCanvas();

// ---- Shaders ----
const VS = `#version 300 es
in vec2 aPos;
void main() { gl_Position = vec4(aPos, 0.0, 1.0); }
`;

const FS = `#version 300 es
precision highp float;
out vec4 fragColor;

uniform vec2  uRes;
uniform float uTime;
uniform float uSpeed;
uniform float uWarp;
uniform float uGlass;
uniform vec3  uColorA; // shadow
uniform vec3  uColorB; // core / bright

// Value noise
float hash(vec2 p) {
  return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
}

float noise(vec2 p) {
  vec2 i = floor(p), f = fract(p);
  f = f * f * (3.0 - 2.0 * f);
  return mix(mix(hash(i),             hash(i + vec2(1.0, 0.0)), f.x),
             mix(hash(i + vec2(0,1)), hash(i + vec2(1.0, 1.0)), f.x), f.y);
}

// FBM — 5 octaves with slight rotation per layer
float fbm(vec2 p) {
  float v = 0.0, a = 0.5;
  for (int i = 0; i < 5; i++) {
    v += a * noise(p);
    // slight rotation + offset between octaves breaks axis-aligned artifacts
    float px = p.x * 2.07 - p.y * 0.24 + 3.17;
    float py = p.x * 0.24 + p.y * 2.07 + 1.93;
    p = vec2(px, py);
    a *= 0.48;
  }
  return v;
}

// Color gradient: black → shadow color → core color → white
// Tips always desaturate to near-white to sell the glowing/specular look
vec3 baseColor(float f) {
  vec3 bright = mix(uColorB, vec3(1.0), 0.42); // core → white
  vec3 c = vec3(0.0);
  c = mix(c, uColorA * 0.7, smoothstep(0.12, 0.35, f));
  c = mix(c, uColorA,       smoothstep(0.28, 0.50, f));
  c = mix(c, uColorB,       smoothstep(0.42, 0.64, f));
  c = mix(c, bright,        smoothstep(0.58, 0.78, f));
  c = mix(c, vec3(1.0),     smoothstep(0.72, 0.88, f));
  return c;
}

vec3 hsv2rgb(vec3 c) {
  vec4 K = vec4(1.0, 2.0/3.0, 1.0/3.0, 3.0);
  vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
  return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
}

void main() {
  vec2 uv = gl_FragCoord.xy / uRes;
  float aspect = uRes.x / uRes.y;
  vec2 p = vec2(uv.x * aspect, uv.y);

  float t = uTime * uSpeed;

  // --- Domain-warped FBM ---
  // Base coordinate drifts upward over time (fire rises)
  vec2 p0 = p * 2.5 - vec2(0.0, t * 0.30);

  // First warp layer
  vec2 q = vec2(
    fbm(p0                        ),
    fbm(p0 + vec2(4.8,  2.2)     )
  );

  // Second warp layer (slower, different direction)
  vec2 r = vec2(
    fbm(p0 + q * uWarp + vec2(1.7,  9.2)),
    fbm(p0 + q * uWarp + vec2(8.3,  2.8))
  );

  // Final warped coordinate
  vec2 fp = p0 + r * uWarp * 0.80;
  float f  = fbm(fp);

  // --- Surface normal from FBM gradient ---
  float ne = 0.014;
  vec2 dn = vec2(
    fbm(fp + vec2(ne, 0.0)) - fbm(fp - vec2(ne, 0.0)),
    fbm(fp + vec2(0.0, ne)) - fbm(fp - vec2(0.0, ne))
  ) * (1.0 / (2.0 * ne));
  vec3 N = normalize(vec3(dn * 1.8, 1.0));

  // --- Base color from palette ---
  // Subtle chromatic dispersion: R/B sample at slightly offset positions
  float cd = uGlass * 0.016;
  vec3 col = vec3(
    baseColor(fbm(fp + dn * cd     )).r,
    baseColor(f                    ).g,
    baseColor(fbm(fp - dn * cd     )).b
  );

  // --- Specular highlights (two light sources) ---
  vec3 L1 = normalize(vec3( 0.40, 0.85, 1.20));
  vec3 L2 = normalize(vec3(-0.55, 0.50, 0.90));
  vec3 V  = vec3(0.0, 0.0, 1.0);
  float spec1 = pow(max(0.0, dot(reflect(-L1, N), V)), 32.0) * 0.90;
  float spec2 = pow(max(0.0, dot(reflect(-L2, N), V)), 14.0) * 0.50;
  float spec  = spec1 + spec2;

  // --- Iridescent glass overlay ---
  // Map surface angle + local FBM value to hue — creates soap-bubble / oil-film shimmer
  float iridH = fract(f * 0.85 + dot(dn, vec2(0.42, 0.28)) * 0.35 + t * 0.022);
  vec3  irid  = hsv2rgb(vec3(iridH, 0.80, 0.95));

  // Fresnel: edges of the surface catch more iridescent light
  float fresnel = pow(1.0 - clamp(dot(N, V), 0.0, 1.0), 2.0);

  // Blend iridescence at edges
  col = mix(col, irid * (col * 0.4 + 0.6), fresnel * uGlass * 0.65);

  // Add specular
  col += vec3(spec) * (0.4 + uGlass * 0.7);

  // --- Bloom: boost the very brightest areas ---
  float lum = dot(col, vec3(0.30, 0.59, 0.11));
  col += col * smoothstep(0.55, 1.0, lum) * 0.35;

  // --- Tone map + gentle gamma ---
  col = col / (col + vec3(0.80));
  col = pow(max(col, vec3(0.0)), vec3(1.0 / 1.12));

  fragColor = vec4(col, 1.0);
}
`;

function mkShader(type, src) {
  const s = gl.createShader(type);
  gl.shaderSource(s, src);
  gl.compileShader(s);
  if (!gl.getShaderParameter(s, gl.COMPILE_STATUS))
    console.error('Shader error:', gl.getShaderInfoLog(s));
  return s;
}

const prog = gl.createProgram();
gl.attachShader(prog, mkShader(gl.VERTEX_SHADER,   VS));
gl.attachShader(prog, mkShader(gl.FRAGMENT_SHADER, FS));
gl.linkProgram(prog);
if (!gl.getProgramParameter(prog, gl.LINK_STATUS))
  console.error('Link error:', gl.getProgramInfoLog(prog));
gl.useProgram(prog);

const buf = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1,-1, 1,-1, -1,1, 1,1]), gl.STATIC_DRAW);
const aPos = gl.getAttribLocation(prog, 'aPos');
gl.enableVertexAttribArray(aPos);
gl.vertexAttribPointer(aPos, 2, gl.FLOAT, false, 0, 0);

const U = {
  res:    gl.getUniformLocation(prog, 'uRes'),
  time:   gl.getUniformLocation(prog, 'uTime'),
  speed:  gl.getUniformLocation(prog, 'uSpeed'),
  warp:   gl.getUniformLocation(prog, 'uWarp'),
  glass:  gl.getUniformLocation(prog, 'uGlass'),
  colorA: gl.getUniformLocation(prog, 'uColorA'),
  colorB: gl.getUniformLocation(prog, 'uColorB'),
};

function frame(ts) {
  if (lastTs !== null && playing) elapsed += (ts - lastTs) / 1000;
  lastTs = ts;

  const ca = hexToRgb(document.getElementById('cShadow').value);
  const cb = hexToRgb(document.getElementById('cCore').value);

  gl.uniform2f(U.res,   canvas.width, canvas.height);
  gl.uniform1f(U.time,  elapsed);
  gl.uniform1f(U.speed, parseFloat(document.getElementById('sSpeed').value));
  gl.uniform1f(U.warp,  parseFloat(document.getElementById('sWarp').value));
  gl.uniform1f(U.glass, parseFloat(document.getElementById('sGlass').value));
  gl.uniform3f(U.colorA, ca[0], ca[1], ca[2]);
  gl.uniform3f(U.colorB, cb[0], cb[1], cb[2]);

  gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
  requestAnimationFrame(frame);
}
requestAnimationFrame(frame);

// ---- Controls ----
[
  ['sWarp',  'vWarp',  2],
  ['sSpeed', 'vSpeed', 2],
  ['sGlass', 'vGlass', 2],
].forEach(([sid, vid, dp]) => {
  document.getElementById(sid).addEventListener('input', () => {
    document.getElementById(vid).textContent =
      parseFloat(document.getElementById(sid).value).toFixed(dp);
  });
});


function togglePlay() {
  playing = !playing;
  if (playing) lastTs = null;
  document.getElementById('btnPlay').textContent = playing ? '⏸ Pause' : '▶ Play';
}

function savePng() {
  const a = document.createElement('a');
  a.download = 'glass-flame.png';
  a.href = canvas.toDataURL('image/png');
  a.click();
}

let mediaRecorder2 = null, recordChunks2 = [];
function toggleRecord() {
  const btn = document.getElementById('btnRec');
  if (!mediaRecorder2) {
    const mimeType = ['video/webm;codecs=vp9','video/webm;codecs=vp8','video/webm']
      .find(m => MediaRecorder.isTypeSupported(m));
    const stream = canvas.captureStream(30);
    mediaRecorder2 = new MediaRecorder(stream, { mimeType, videoBitsPerSecond: 8_000_000 });
    recordChunks2 = [];
    mediaRecorder2.ondataavailable = e => { if (e.data.size > 0) recordChunks2.push(e.data); };
    mediaRecorder2.onstop = () => {
      const blob = new Blob(recordChunks2, { type: mimeType });
      const a = document.createElement('a');
      a.download = 'glass-flame.webm';
      a.href = URL.createObjectURL(blob);
      a.click();
      URL.revokeObjectURL(a.href);
      mediaRecorder2 = null;
    };
    mediaRecorder2.start();
    btn.textContent = '⏹ Stop';
    btn.classList.add('rec');
    if (!playing) togglePlay();
  } else {
    mediaRecorder2.stop();
    btn.textContent = '⏺ Record';
    btn.classList.remove('rec');
  }
}
</script>

</body>
</html>