@openhps/core/src/three/nodes/math/Hash.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.hash = void 0;
var _TSLBase = require("../tsl/TSLBase.js");
/**
 * Generates a hash value in the range `[0, 1]` from the given seed.
 *
 * @tsl
 * @function
 * @param {Node<float>} seed - The seed.
 * @return {Node<float>} The hash value.
 */
const hash = exports.hash = /*@__PURE__*/(0, _TSLBase.Fn)(([seed]) => {
  // Taken from https://www.shadertoy.com/view/XlGcRh, originally from pcg-random.org

  const state = seed.toUint().mul(747796405).add(2891336453);
  const word = state.shiftRight(state.shiftRight(28).add(4)).bitXor(state).mul(277803737);
  const result = word.shiftRight(22).bitXor(word);
  return result.toFloat().mul(1 / 2 ** 32); // Convert to range [0, 1)
});