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allow offsetting onFrame

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This commit is contained in:
Felix Roos 2024-03-07 13:17:40 +01:00
parent d5ed065011
commit 75098adbdb
1 changed files with 2 additions and 2 deletions
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4
packages/canvas/draw.mjs
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@ -64,7 +64,7 @@ Pattern.prototype.draw = function (callback, { from, to, onQuery } = {}) {
// this is a more generic helper to get a rendering callback for the currently active haps
// TODO: this misses events that are prolonged with clip or duration (would need state)
Pattern.prototype.onFrame = function (fn) {
Pattern.prototype.onFrame = function (fn, offset = 0) {
if (typeof window === 'undefined') {
return this;
}
@ -72,7 +72,7 @@ Pattern.prototype.onFrame = function (fn) {
cancelAnimationFrame(window.strudelAnimation);
}
const animate = () => {
const t = getTime();
const t = getTime() + offset;
const haps = this.queryArc(t, t);
fn(haps, t, this);
window.strudelAnimation = requestAnimationFrame(animate);