@thi.ng/dsp/pan.js

Composable signal generators, oscillators, filters, FFT, spectrum, windowing & related DSP utils

import { QUARTER_PI } from "@thi.ng/math/api";
import { clamp11 } from "@thi.ng/math/interval";
import { AProc } from "./aproc.js";
import { __ensureGenN } from "./internal/ensure.js";
const pan = (pos) => new Pan(pos);
class Pan extends AProc {
  _pos;
  constructor(pos = 0) {
    super([0, 0]);
    this.pos = pos;
  }
  get pos() {
    return this._pos.deref();
  }
  set pos(pos) {
    this._pos = __ensureGenN(pos, clamp11);
  }
  next(x) {
    const pos = this._pos.next() * QUARTER_PI;
    const s = x * Math.sin(pos);
    const c = x * Math.cos(pos);
    return [c - s, s + c];
  }
}
export {
  Pan,
  pan
};