@observerly/astrometry/dist/projection.js

observerly's lightweight, zero-dependency, type safe astrometry library written in Typescript for calculating the position of celestial objects in the sky.

import { e as P, c as d } from "./utilities-BM-rBPno.js";
const f = (g, i, v = 0.42) => {
  const { az: e, alt: r } = g, { width: M, height: o } = i, s = v, l = 0, a = 1, n = Math.cos(d(e) - Math.PI), c = Math.sin(d(e) - Math.PI), t = Math.sin(d(r)), h = Math.cos(d(r)), z = 2 / (1 + l * t + a * h * n), T = M / 2 + s * z * o * h * c, w = o - s * z * o * (a * t - l * h * n);
  return {
    x: T,
    y: w
  };
}, m = (g, i, v = 0.2) => {
  const { x: e, y: r } = g, M = 0, o = 1, s = i.height, l = i.width, a = (e - l / 2) / s, n = (s - r) / s, c = Math.sqrt(a ** 2 + n ** 2), t = 2 * Math.atan2(c, 2 * v), h = Math.asin(Math.cos(t) * M + n * Math.sin(t) * o / c), z = Math.PI + Math.atan2(a * Math.sin(t), c * o * Math.cos(t) - n * M * Math.sin(t));
  return {
    az: P(z),
    alt: P(h)
  };
};
export {
  f as convertHorizontalToStereo,
  m as convertStereoToHorizontal
};
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