https://shoemoney.com/assets/picaso-signature.js

1/* Picaso's bounded Canvas 2D circuit sculpture. The page's WebGPU world stays independent. */
2(() => {
3  'use strict';
4  const card = document.querySelector('[data-skill-id="picaso"]');
5  const canvas = card?.querySelector('.picaso-energy');
6  const stage = card?.querySelector('.picaso-reactor');
7  const button = card?.querySelector('.picaso-charge');
8  const context = canvas?.getContext('2d');
9  if (!card || !canvas || !stage || !button || !context) return;
10
11  const listeners = new AbortController();
12  const { signal } = listeners;
13  const reduced = matchMedia('(prefers-reduced-motion: reduce)');
14  let frame = 0, last = 0, clock = 0, frames = 0;
15  let width = 1, height = 1, dpr = 1, visible = false, suspended = false;
16  let charge = 0, engaged = false, pointerX = 0, pointerY = 0, offsetX = 0, offsetY = 0;
17  const colors = ['#9dffed', '#8a8dff', '#80dbff'];
18  const permitted = () => !reduced.matches && !document.documentElement.classList.contains('motion-paused');
19  const running = () => permitted() && visible && !document.hidden && !suspended && card.style.display !== 'none';
20
21  function path(points, color, alpha, thickness, glow = 0) {
22    context.beginPath();
23    context.moveTo(points[0][0], points[0][1]);
24    for (let i = 1; i < points.length; i++) context.lineTo(points[i][0], points[i][1]);
25    context.strokeStyle = color;
26    context.globalAlpha = alpha;
27    context.lineWidth = thickness;
28    context.shadowColor = color;
29    context.shadowBlur = glow;
30    context.stroke();
31    context.shadowBlur = 0;
32    context.globalAlpha = 1;
33  }
34
35  function draw() {
36    context.setTransform(dpr, 0, 0, dpr, 0, 0);
37    context.clearRect(0, 0, width, height);
38    const radius = Math.min(width, height) * .405;
39    const cx = width / 2 + offsetX, cy = height / 2 + offsetY;
40    const energy = 1 + charge * .6 + (engaged ? .12 : 0);
41    const halo = context.createRadialGradient(cx, cy, radius * .12, cx, cy, radius * 1.3);
42    halo.addColorStop(0, '#85eedd04');
43    halo.addColorStop(.58, '#9181ff15');
44    halo.addColorStop(.77, '#75ead724');
45    halo.addColorStop(1, '#75ead700');
46    context.fillStyle = halo;
47    context.fillRect(0, 0, width, height);
48
49    // Continuous braided conduits, deliberately smooth in time: no random frame flicker.
50    for (let strand = 0; strand < 3; strand++) {
51      const points = [];
52      for (let j = 0; j <= 160; j++) {
53        const angle = j / 160 * Math.PI * 2;
54        const wave = Math.sin(angle * 11 + clock * .8 + strand * 1.7) * 4
55          + Math.sin(angle * 23 - clock * .6 + strand) * 2.5;
56        const r = radius * (.74 + strand * .095) + wave * energy;
57        points.push([cx + Math.cos(angle) * r, cy + Math.sin(angle) * r]);
58      }
59      path(points, colors[strand], .5 + charge * .15, strand === 0 ? 1.8 : 1, 10);
60    }
61
62    // Eight live circuit branches connect the central processor to the outer field.
63    for (let branch = 0; branch < 8; branch++) {
64      const angle = branch * Math.PI / 4 + .18;
65      const points = [];
66      for (let step = 0; step <= 20; step++) {
67        const along = step / 20;
68        const r = radius * (.35 + along * .7);
69        const bend = Math.sin(along * Math.PI) * Math.sin(along * 15 + branch * 1.8 + clock * .75) * 9 * energy;
70        points.push([cx + Math.cos(angle) * r - Math.sin(angle) * bend, cy + Math.sin(angle) * r + Math.cos(angle) * bend]);
71      }
72      path(points, colors[branch % 3], .25 + charge * .15, 1, 5);
73      const endpoint = points[20];
74      context.strokeStyle = colors[branch % 3];
75      context.globalAlpha = .65;
76      context.beginPath(); context.arc(endpoint[0], endpoint[1], 3, 0, Math.PI * 2); context.stroke();
77      context.globalAlpha = 1;
78    }
79
80    // Sixty-four bounded motes drift along orbital paths; charge expands their orbit.
81    for (let i = 0; i < 64; i++) {
82      const angle = i * 2.399963 + clock * (.1 + (i % 5) * .014) * (i % 2 ? 1 : -1);
83      const r = radius * (.58 + (i % 13) / 30 + charge * .055);
84      const x = cx + Math.cos(angle) * r;
85      const y = cy + Math.sin(angle) * r * (.89 + (i % 3) * .055);
86      context.fillStyle = colors[i % 3];
87      context.globalAlpha = .3 + (Math.sin(clock * .6 + i) + 1) * .23;
88      context.beginPath(); context.arc(x, y, i % 7 === 0 ? 2.4 : 1.25, 0, Math.PI * 2); context.fill();
89    }
90    context.globalAlpha = 1;
91    canvas.dataset.frames = String(++frames);
92  }
93
94  function tick(now) {
95    frame = 0;
96    if (!running()) { sync(); return; }

97    const elapsed = last ? now - last : 34;
98    if (elapsed >= 32) {
99      const dt = Math.min(elapsed / 1000, .07);
100      last = now;
101      clock += dt * (1 + charge * .8);
102      charge = Math.max(0, charge - dt * .24);
103      offsetX += (pointerX * 12 - offsetX) * .075;
104      offsetY += (pointerY * 12 - offsetY) * .075;
105      card.dataset.charged = charge > .05 ? 'true' : 'false';
106      draw();
107    }
108    frame = requestAnimationFrame(tick);
109  }
110
111  function sync() {
112    cancelAnimationFrame(frame);
113    frame = 0; last = 0;
114    const state = running() ? 'running' : reduced.matches ? 'reduced' : 'paused';
115    canvas.dataset.motion = state;
116    if (state === 'running') frame = requestAnimationFrame(tick);
117    else {
118      offsetX = 0; offsetY = 0;
119      draw();
120    }
121  }
122
123  function resize() {
124    const bounds = stage.getBoundingClientRect();
125    if (!bounds.width || !bounds.height) return;
126    width = bounds.width; height = bounds.height;
127    dpr = Math.min(devicePixelRatio || 1, 1.5);
128    canvas.width = Math.round(width * dpr); canvas.height = Math.round(height * dpr);
129    draw();
130  }
131
132  card.addEventListener('pointermove', event => {
133    const bounds = card.getBoundingClientRect();
134    pointerX = (event.clientX - bounds.left) / bounds.width * 2 - 1;
135    pointerY = (event.clientY - bounds.top) / bounds.height * 2 - 1;
136    card.style.setProperty('--picaso-x', `${(pointerX + 1) * 50}%`);
137    card.style.setProperty('--picaso-y', `${(pointerY + 1) * 50}%`);
138    engaged = true;
139  }, { passive: true, signal });
140  card.addEventListener('pointerleave', () => { engaged = false; pointerX = 0; pointerY = 0; }, { signal });
141  card.addEventListener('focusin', () => { engaged = true; }, { signal });
142  card.addEventListener('focusout', event => { if (!card.contains(event.relatedTarget)) engaged = false; }, { signal });
143  button.addEventListener('click', () => {
144    charge = 1; card.dataset.charged = 'true';
145    // In reduced/paused mode, the same action creates a deliberate static charged composition.
146    if (!running()) draw();
147  }, { signal });
148
149  const intersection = new IntersectionObserver(entries => {
150    visible = entries[0].isIntersecting; sync();
151  }, { threshold: 0 });
152  const size = new ResizeObserver(resize);
153  const motion = new MutationObserver(sync);
154  const display = new MutationObserver(records => {
155    if (records.some(record => record.oldValue?.includes('display: none') !== (card.style.display === 'none'))) sync();
156  });
157  intersection.observe(card);
158  size.observe(stage);
159  motion.observe(document.documentElement, { attributes: true, attributeFilter: ['class'] });
160  display.observe(card, { attributes: true, attributeFilter: ['style'], attributeOldValue: true });
161  reduced.addEventListener('change', sync, { signal });
162  document.addEventListener('visibilitychange', sync, { signal });
163  window.addEventListener('pagehide', event => {
164    suspended = true; sync();
165    if (!event.persisted) {
166      listeners.abort(); intersection.disconnect(); size.disconnect(); motion.disconnect(); display.disconnect();
167    }
168  }, { signal });
169  window.addEventListener('pageshow', () => { suspended = false; sync(); }, { signal });
170  card.classList.add('picaso-ready');
171  resize(); sync();
172})();