(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports);
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports);
    global.ImprovedNoise = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.ImprovedNoise = void 0;

  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }

  // http://mrl.nyu.edu/~perlin/noise/
  var _p = [151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180];

  for (var i = 0; i < 256; i++) {
    _p[256 + i] = _p[i];
  }

  function fade(t) {
    return t * t * t * (t * (t * 6 - 15) + 10);
  }

  function lerp(t, a, b) {
    return a + t * (b - a);
  }

  function grad(hash, x, y, z) {
    var h = hash & 15;
    var u = h < 8 ? x : y,
        v = h < 4 ? y : h == 12 || h == 14 ? x : z;
    return ((h & 1) == 0 ? u : -u) + ((h & 2) == 0 ? v : -v);
  }

  var ImprovedNoise = /*#__PURE__*/function () {
    function ImprovedNoise() {
      _classCallCheck(this, ImprovedNoise);
    }

    _createClass(ImprovedNoise, [{
      key: "noise",
      value: function noise(x, y, z) {
        var floorX = Math.floor(x),
            floorY = Math.floor(y),
            floorZ = Math.floor(z);
        var X = floorX & 255,
            Y = floorY & 255,
            Z = floorZ & 255;
        x -= floorX;
        y -= floorY;
        z -= floorZ;
        var xMinus1 = x - 1,
            yMinus1 = y - 1,
            zMinus1 = z - 1;
        var u = fade(x),
            v = fade(y),
            w = fade(z);
        var A = _p[X] + Y,
            AA = _p[A] + Z,
            AB = _p[A + 1] + Z,
            B = _p[X + 1] + Y,
            BA = _p[B] + Z,
            BB = _p[B + 1] + Z;
        return lerp(w, lerp(v, lerp(u, grad(_p[AA], x, y, z), grad(_p[BA], xMinus1, y, z)), lerp(u, grad(_p[AB], x, yMinus1, z), grad(_p[BB], xMinus1, yMinus1, z))), lerp(v, lerp(u, grad(_p[AA + 1], x, y, zMinus1), grad(_p[BA + 1], xMinus1, y, zMinus1)), lerp(u, grad(_p[AB + 1], x, yMinus1, zMinus1), grad(_p[BB + 1], xMinus1, yMinus1, zMinus1))));
      }
    }]);

    return ImprovedNoise;
  }();

  _exports.ImprovedNoise = ImprovedNoise;
});