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radiance: simulation clock x1.5 (currents, spin, lifecycles, fluid) and cursor force +30%

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dangrubbb
2026-10-24 09:46:18 -04:00
parent ea3f061211
commit 1645ed76ca
1 changed files with 6 additions and 4 deletions
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10
src/scripts/orb.js
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@ -799,7 +799,7 @@ export function startOrb(canvas, { onReady } = {}) {
document.documentElement.addEventListener('mouseleave', onLeave);
// fluid tuning
const FORCE = 1500;
const FORCE = 1950;
const RADIUS = 0.008;
const VEL_DISSIPATION = 1.5;
const DYE_DISSIPATION = 1.1;
@ -891,6 +891,7 @@ export function startOrb(canvas, { onReady } = {}) {
into(dye.write); tri(); dye.swap();
}
const SPEED = 1.5;
let simT = reduced ? 8 : 0;
let last = performance.now();
let ready = false;
@ -902,13 +903,14 @@ export function startOrb(canvas, { onReady } = {}) {
}
function frame(now) {
const dt = Math.min((now - last) / 1000, 1 / 30) || 1 / 60;
// everything (currents, spin, lifecycles, the cursor fluid) runs on one sped-up simulation clock
const dt = (Math.min((now - last) / 1000, 1 / 30) || 1 / 60) * SPEED;
last = now;
// simulation clock: advances by clamped steps, so a backgrounded tab resumes without a jump
if (!reduced) simT += dt;
const t = simT;
par.cx += (par.x - par.cx) * 0.04;
par.cy += (par.y - par.cy) * 0.04;
par.cx += (par.x - par.cx) * 0.04 * SPEED;
par.cy += (par.y - par.cy) * 0.04 * SPEED;
const ox = par.cx * 10, oy = par.cy * 6;
if (interactive) {