@openhps/core/dist/esm/three/nodes/functions/material/getShIrradianceAt.js

Open Hybrid Positioning System - Core component

import { Fn, mul } from '../../tsl/TSLBase.js';
const getShIrradianceAt = /*@__PURE__*/Fn(([normal, shCoefficients]) => {
  // normal is assumed to have unit length

  const x = normal.x,
    y = normal.y,
    z = normal.z;

  // band 0
  let result = shCoefficients.element(0).mul(0.886227);

  // band 1
  result = result.add(shCoefficients.element(1).mul(2.0 * 0.511664).mul(y));
  result = result.add(shCoefficients.element(2).mul(2.0 * 0.511664).mul(z));
  result = result.add(shCoefficients.element(3).mul(2.0 * 0.511664).mul(x));

  // band 2
  result = result.add(shCoefficients.element(4).mul(2.0 * 0.429043).mul(x).mul(y));
  result = result.add(shCoefficients.element(5).mul(2.0 * 0.429043).mul(y).mul(z));
  result = result.add(shCoefficients.element(6).mul(z.mul(z).mul(0.743125).sub(0.247708)));
  result = result.add(shCoefficients.element(7).mul(2.0 * 0.429043).mul(x).mul(z));
  result = result.add(shCoefficients.element(8).mul(0.429043).mul(mul(x, x).sub(mul(y, y))));
  return result;
});
export default getShIrradianceAt;