(() => { 'use strict'; if (!window.THREE) return; const canvas = document.getElementById('fogo-particle-canvas'); if (!canvas) return; const renderer = new THREE.WebGLRenderer({ canvas, antialias: true }); renderer.setPixelRatio(Math.min(devicePixelRatio, 2)); renderer.setSize(window.innerWidth, window.innerHeight); renderer.setClearColor(0x000000, 1); const scene = new THREE.Scene(); const LOGO_OFFSET_X = 310; const LOGO_OFFSET_Y = 0; const CAMERA_BASE_X = 260; const CAMERA_LOOK_X = 272; const camera = new THREE.PerspectiveCamera(36, window.innerWidth / window.innerHeight, 0.1, 2000); camera.position.set(CAMERA_BASE_X, 22, 100); camera.lookAt(CAMERA_LOOK_X, 0, 0); function h(n) { const x = Math.sin(n) * 43758.5453123; return x - Math.floor(x); } function sn(x, y) { const ix = Math.floor(x), iy = Math.floor(y), fx = x - ix, fy = y - iy; const ux = fx * fx * (3 - 2 * fx), uy = fy * fy * (3 - 2 * fy); const a = h(ix + iy * 57), b = h(ix + 1 + iy * 57), c = h(ix + (iy + 1) * 57), d = h(ix + 1 + (iy + 1) * 57); return a + (b - a) * ux + (c - a) * uy + (d + a - b - c) * ux * uy; } function fbm(x, y) { let v = 0, a = 0.5, f = 1.0; for (let i = 0; i < 5; i++) { v += a * (sn(x * f, y * f) * 2 - 1); a *= 0.48; f *= 2.17; } return v; } function buildParticles(img) { const OW = 700, OH = Math.round(OW * img.height / img.width); const oc = document.createElement('canvas'); oc.width = OW; oc.height = OH; const ctx = oc.getContext('2d'); ctx.fillStyle = '#fff'; ctx.fillRect(0, 0, OW, OH); ctx.drawImage(img, 0, 0, OW, OH); const { data } = ctx.getImageData(0, 0, OW, OH); const T = 85; let x0 = OW, x1 = 0, y0 = OH, y1 = 0; for (let py = 0; py < OH; py++) { for (let px = 0; px < OW; px++) { const i = (py * OW + px) * 4; if ((data[i] + data[i + 1] + data[i + 2]) / 3 < T) { if (px < x0) x0 = px; if (px > x1) x1 = px; if (py < y0) y0 = py; if (py > y1) y1 = py; } } } const cx = (x0 + x1) / 2, cy = (y0 + y1) / 2, lw = x1 - x0, lh = y1 - y0; const viewH = 2 * Math.tan((36 * Math.PI / 180) / 2) * 100; const th = viewH * 0.7, tw = th * (lw / lh), sx = tw / lw, sy = th / lh; const pos = [], col = []; const sampleGap = window.innerWidth < 768 ? 5 : 3; for (let py = y0; py <= y1; py += sampleGap) { for (let px = x0; px <= x1; px += sampleGap) { const i = (py * OW + px) * 4; if ((data[i] + data[i + 1] + data[i + 2]) / 3 < T) { pos.push((px - cx) * sx + LOGO_OFFSET_X, -(py - cy) * sy + LOGO_OFFSET_Y, 0); col.push(0, 0, 0); } } } return { pos: new Float32Array(pos), col: new Float32Array(col) }; } function init({ pos, col }) { const orig = pos.slice(); const geo = new THREE.BufferGeometry(); geo.setAttribute('position', new THREE.BufferAttribute(pos.slice(), 3)); geo.setAttribute('color', new THREE.BufferAttribute(col.slice(), 3)); const points = new THREE.Points(geo, new THREE.PointsMaterial({ vertexColors: true, size: 0.34, sizeAttenuation: true, transparent: false, depthWrite: false })); scene.add(points); const posA = geo.attributes.position; const colA = geo.attributes.color; const N = posA.count; const disps = new Float32Array(N); const t0 = performance.now(); const AMP = 10, SF = 0.062, TS = 0.11; (function loop() { requestAnimationFrame(loop); const t = (performance.now() - t0) * 0.001; let dmin = Infinity, dmax = -Infinity; for (let i = 0; i < N; i++) { const ox = orig[i * 3], oy = orig[i * 3 + 1]; const d = fbm(ox * SF + t * TS, oy * SF * 0.6 + t * TS * 0.68) * AMP + fbm(ox * SF * 2.2 + t * TS * 0.42 + 6.1, oy * SF * 2.0 + t * TS * 0.36) * AMP * 0.24; disps[i] = d; if (d < dmin) dmin = d; if (d > dmax) dmax = d; } const dspan = Math.max(0.001, dmax - dmin); for (let i = 0; i < N; i++) { const d = disps[i]; posA.setZ(i, d); const norm = (d - dmin) / dspan; let b; if (norm > 0.68) b = 0.5 + (norm - 0.68) / 0.32 * 0.5; else if (norm > 0.3) b = 0.05 + (norm - 0.3) / 0.38 * 0.45; else b = (norm / 0.3) * 0.04; colA.setXYZ(i, b, b, b); } posA.needsUpdate = true; colA.needsUpdate = true; const dx = Math.sin(t * 0.022) * 1.5; camera.position.set(CAMERA_BASE_X + dx, 22 + Math.sin(t * 0.014) * 0.8, 100); camera.lookAt(CAMERA_LOOK_X + dx * 0.12, 0, 0); const pageScale = Number(document.body?.getAttribute('data-logo-scale') || '1'); const safeScale = Number.isFinite(pageScale) && pageScale > 0 ? pageScale : 1; points.scale.set(safeScale, safeScale, 1); renderer.render(scene, camera); })(); } const img = new Image(); img.crossOrigin = 'anonymous'; img.onload = () => init(buildParticles(img)); img.src = '/brand/fogo-mark-black.jpg'; window.addEventListener('resize', () => { camera.aspect = window.innerWidth / window.innerHeight; camera.updateProjectionMatrix(); renderer.setSize(window.innerWidth, window.innerHeight); }); })();

Use Cases