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

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

  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; }

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

  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } Object.defineProperty(subClass, "prototype", { value: Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }), writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }

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  function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

  function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

  /**
   * Tessellates the famous Utah teapot database by Martin Newell into triangles.
   *
   * Parameters: size = 50, segments = 10, bottom = true, lid = true, body = true,
   *   fitLid = false, blinn = true
   *
   * size is a relative scale: I've scaled the teapot to fit vertically between -1 and 1.
   * Think of it as a "radius".
   * segments - number of line segments to subdivide each patch edge;
   *   1 is possible but gives degenerates, so two is the real minimum.
   * bottom - boolean, if true (default) then the bottom patches are added. Some consider
   *   adding the bottom heresy, so set this to "false" to adhere to the One True Way.
   * lid - to remove the lid and look inside, set to true.
   * body - to remove the body and leave the lid, set this and "bottom" to false.
   * fitLid - the lid is a tad small in the original. This stretches it a bit so you can't
   *   see the teapot's insides through the gap.
   * blinn - Jim Blinn scaled the original data vertically by dividing by about 1.3 to look
   *   nicer. If you want to see the original teapot, similar to the real-world model, set
   *   this to false. True by default.
   *   See http://en.wikipedia.org/wiki/File:Original_Utah_Teapot.jpg for the original
   *   real-world teapot (from http://en.wikipedia.org/wiki/Utah_teapot).
   *
   * Note that the bottom (the last four patches) is not flat - blame Frank Crow, not me.
   *
   * The teapot should normally be rendered as a double sided object, since for some
   * patches both sides can be seen, e.g., the gap around the lid and inside the spout.
   *
   * Segments 'n' determines the number of triangles output.
   *   Total triangles = 32*2*n*n - 8*n    [degenerates at the top and bottom cusps are deleted]
   *
   *   size_factor   # triangles
   *       1          56
   *       2         240
   *       3         552
   *       4         992
   *
   *      10        6320
   *      20       25440
   *      30       57360
   *
   * Code converted from my ancient SPD software, http://tog.acm.org/resources/SPD/
   * Created for the Udacity course "Interactive Rendering", http://bit.ly/ericity
   * Lesson: https://www.udacity.com/course/viewer#!/c-cs291/l-68866048/m-106482448
   * YouTube video on teapot history: https://www.youtube.com/watch?v=DxMfblPzFNc
   *
   * See https://en.wikipedia.org/wiki/Utah_teapot for the history of the teapot
   *
   */
  var TeapotGeometry = /*#__PURE__*/function (_BufferGeometry) {
    _inherits(TeapotGeometry, _BufferGeometry);

    var _super = _createSuper(TeapotGeometry);

    function TeapotGeometry() {
      var _this;

      var size = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 50;
      var segments = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 10;
      var bottom = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
      var lid = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;
      var body = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : true;
      var fitLid = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : true;
      var blinn = arguments.length > 6 && arguments[6] !== undefined ? arguments[6] : true;

      _classCallCheck(this, TeapotGeometry);

      // 32 * 4 * 4 Bezier spline patches
      var teapotPatches = [
      /*rim*/
      0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 3, 16, 17, 18, 7, 19, 20, 21, 11, 22, 23, 24, 15, 25, 26, 27, 18, 28, 29, 30, 21, 31, 32, 33, 24, 34, 35, 36, 27, 37, 38, 39, 30, 40, 41, 0, 33, 42, 43, 4, 36, 44, 45, 8, 39, 46, 47, 12,
      /*body*/
      12, 13, 14, 15, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 15, 25, 26, 27, 51, 60, 61, 62, 55, 63, 64, 65, 59, 66, 67, 68, 27, 37, 38, 39, 62, 69, 70, 71, 65, 72, 73, 74, 68, 75, 76, 77, 39, 46, 47, 12, 71, 78, 79, 48, 74, 80, 81, 52, 77, 82, 83, 56, 56, 57, 58, 59, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 59, 66, 67, 68, 87, 96, 97, 98, 91, 99, 100, 101, 95, 102, 103, 104, 68, 75, 76, 77, 98, 105, 106, 107, 101, 108, 109, 110, 104, 111, 112, 113, 77, 82, 83, 56, 107, 114, 115, 84, 110, 116, 117, 88, 113, 118, 119, 92,
      /*handle*/
      120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 123, 136, 137, 120, 127, 138, 139, 124, 131, 140, 141, 128, 135, 142, 143, 132, 132, 133, 134, 135, 144, 145, 146, 147, 148, 149, 150, 151, 68, 152, 153, 154, 135, 142, 143, 132, 147, 155, 156, 144, 151, 157, 158, 148, 154, 159, 160, 68,
      /*spout*/
      161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 164, 177, 178, 161, 168, 179, 180, 165, 172, 181, 182, 169, 176, 183, 184, 173, 173, 174, 175, 176, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 176, 183, 184, 173, 188, 197, 198, 185, 192, 199, 200, 189, 196, 201, 202, 193,
      /*lid*/
      203, 203, 203, 203, 204, 205, 206, 207, 208, 208, 208, 208, 209, 210, 211, 212, 203, 203, 203, 203, 207, 213, 214, 215, 208, 208, 208, 208, 212, 216, 217, 218, 203, 203, 203, 203, 215, 219, 220, 221, 208, 208, 208, 208, 218, 222, 223, 224, 203, 203, 203, 203, 221, 225, 226, 204, 208, 208, 208, 208, 224, 227, 228, 209, 209, 210, 211, 212, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 212, 216, 217, 218, 232, 241, 242, 243, 236, 244, 245, 246, 240, 247, 248, 249, 218, 222, 223, 224, 243, 250, 251, 252, 246, 253, 254, 255, 249, 256, 257, 258, 224, 227, 228, 209, 252, 259, 260, 229, 255, 261, 262, 233, 258, 263, 264, 237,
      /*bottom*/
      265, 265, 265, 265, 266, 267, 268, 269, 270, 271, 272, 273, 92, 119, 118, 113, 265, 265, 265, 265, 269, 274, 275, 276, 273, 277, 278, 279, 113, 112, 111, 104, 265, 265, 265, 265, 276, 280, 281, 282, 279, 283, 284, 285, 104, 103, 102, 95, 265, 265, 265, 265, 282, 286, 287, 266, 285, 288, 289, 270, 95, 94, 93, 92];
      var teapotVertices = [1.4, 0, 2.4, 1.4, -0.784, 2.4, 0.784, -1.4, 2.4, 0, -1.4, 2.4, 1.3375, 0, 2.53125, 1.3375, -0.749, 2.53125, 0.749, -1.3375, 2.53125, 0, -1.3375, 2.53125, 1.4375, 0, 2.53125, 1.4375, -0.805, 2.53125, 0.805, -1.4375, 2.53125, 0, -1.4375, 2.53125, 1.5, 0, 2.4, 1.5, -0.84, 2.4, 0.84, -1.5, 2.4, 0, -1.5, 2.4, -0.784, -1.4, 2.4, -1.4, -0.784, 2.4, -1.4, 0, 2.4, -0.749, -1.3375, 2.53125, -1.3375, -0.749, 2.53125, -1.3375, 0, 2.53125, -0.805, -1.4375, 2.53125, -1.4375, -0.805, 2.53125, -1.4375, 0, 2.53125, -0.84, -1.5, 2.4, -1.5, -0.84, 2.4, -1.5, 0, 2.4, -1.4, 0.784, 2.4, -0.784, 1.4, 2.4, 0, 1.4, 2.4, -1.3375, 0.749, 2.53125, -0.749, 1.3375, 2.53125, 0, 1.3375, 2.53125, -1.4375, 0.805, 2.53125, -0.805, 1.4375, 2.53125, 0, 1.4375, 2.53125, -1.5, 0.84, 2.4, -0.84, 1.5, 2.4, 0, 1.5, 2.4, 0.784, 1.4, 2.4, 1.4, 0.784, 2.4, 0.749, 1.3375, 2.53125, 1.3375, 0.749, 2.53125, 0.805, 1.4375, 2.53125, 1.4375, 0.805, 2.53125, 0.84, 1.5, 2.4, 1.5, 0.84, 2.4, 1.75, 0, 1.875, 1.75, -0.98, 1.875, 0.98, -1.75, 1.875, 0, -1.75, 1.875, 2, 0, 1.35, 2, -1.12, 1.35, 1.12, -2, 1.35, 0, -2, 1.35, 2, 0, 0.9, 2, -1.12, 0.9, 1.12, -2, 0.9, 0, -2, 0.9, -0.98, -1.75, 1.875, -1.75, -0.98, 1.875, -1.75, 0, 1.875, -1.12, -2, 1.35, -2, -1.12, 1.35, -2, 0, 1.35, -1.12, -2, 0.9, -2, -1.12, 0.9, -2, 0, 0.9, -1.75, 0.98, 1.875, -0.98, 1.75, 1.875, 0, 1.75, 1.875, -2, 1.12, 1.35, -1.12, 2, 1.35, 0, 2, 1.35, -2, 1.12, 0.9, -1.12, 2, 0.9, 0, 2, 0.9, 0.98, 1.75, 1.875, 1.75, 0.98, 1.875, 1.12, 2, 1.35, 2, 1.12, 1.35, 1.12, 2, 0.9, 2, 1.12, 0.9, 2, 0, 0.45, 2, -1.12, 0.45, 1.12, -2, 0.45, 0, -2, 0.45, 1.5, 0, 0.225, 1.5, -0.84, 0.225, 0.84, -1.5, 0.225, 0, -1.5, 0.225, 1.5, 0, 0.15, 1.5, -0.84, 0.15, 0.84, -1.5, 0.15, 0, -1.5, 0.15, -1.12, -2, 0.45, -2, -1.12, 0.45, -2, 0, 0.45, -0.84, -1.5, 0.225, -1.5, -0.84, 0.225, -1.5, 0, 0.225, -0.84, -1.5, 0.15, -1.5, -0.84, 0.15, -1.5, 0, 0.15, -2, 1.12, 0.45, -1.12, 2, 0.45, 0, 2, 0.45, -1.5, 0.84, 0.225, -0.84, 1.5, 0.225, 0, 1.5, 0.225, -1.5, 0.84, 0.15, -0.84, 1.5, 0.15, 0, 1.5, 0.15, 1.12, 2, 0.45, 2, 1.12, 0.45, 0.84, 1.5, 0.225, 1.5, 0.84, 0.225, 0.84, 1.5, 0.15, 1.5, 0.84, 0.15, -1.6, 0, 2.025, -1.6, -0.3, 2.025, -1.5, -0.3, 2.25, -1.5, 0, 2.25, -2.3, 0, 2.025, -2.3, -0.3, 2.025, -2.5, -0.3, 2.25, -2.5, 0, 2.25, -2.7, 0, 2.025, -2.7, -0.3, 2.025, -3, -0.3, 2.25, -3, 0, 2.25, -2.7, 0, 1.8, -2.7, -0.3, 1.8, -3, -0.3, 1.8, -3, 0, 1.8, -1.5, 0.3, 2.25, -1.6, 0.3, 2.025, -2.5, 0.3, 2.25, -2.3, 0.3, 2.025, -3, 0.3, 2.25, -2.7, 0.3, 2.025, -3, 0.3, 1.8, -2.7, 0.3, 1.8, -2.7, 0, 1.575, -2.7, -0.3, 1.575, -3, -0.3, 1.35, -3, 0, 1.35, -2.5, 0, 1.125, -2.5, -0.3, 1.125, -2.65, -0.3, 0.9375, -2.65, 0, 0.9375, -2, -0.3, 0.9, -1.9, -0.3, 0.6, -1.9, 0, 0.6, -3, 0.3, 1.35, -2.7, 0.3, 1.575, -2.65, 0.3, 0.9375, -2.5, 0.3, 1.125, -1.9, 0.3, 0.6, -2, 0.3, 0.9, 1.7, 0, 1.425, 1.7, -0.66, 1.425, 1.7, -0.66, 0.6, 1.7, 0, 0.6, 2.6, 0, 1.425, 2.6, -0.66, 1.425, 3.1, -0.66, 0.825, 3.1, 0, 0.825, 2.3, 0, 2.1, 2.3, -0.25, 2.1, 2.4, -0.25, 2.025, 2.4, 0, 2.025, 2.7, 0, 2.4, 2.7, -0.25, 2.4, 3.3, -0.25, 2.4, 3.3, 0, 2.4, 1.7, 0.66, 0.6, 1.7, 0.66, 1.425, 3.1, 0.66, 0.825, 2.6, 0.66, 1.425, 2.4, 0.25, 2.025, 2.3, 0.25, 2.1, 3.3, 0.25, 2.4, 2.7, 0.25, 2.4, 2.8, 0, 2.475, 2.8, -0.25, 2.475, 3.525, -0.25, 2.49375, 3.525, 0, 2.49375, 2.9, 0, 2.475, 2.9, -0.15, 2.475, 3.45, -0.15, 2.5125, 3.45, 0, 2.5125, 2.8, 0, 2.4, 2.8, -0.15, 2.4, 3.2, -0.15, 2.4, 3.2, 0, 2.4, 3.525, 0.25, 2.49375, 2.8, 0.25, 2.475, 3.45, 0.15, 2.5125, 2.9, 0.15, 2.475, 3.2, 0.15, 2.4, 2.8, 0.15, 2.4, 0, 0, 3.15, 0.8, 0, 3.15, 0.8, -0.45, 3.15, 0.45, -0.8, 3.15, 0, -0.8, 3.15, 0, 0, 2.85, 0.2, 0, 2.7, 0.2, -0.112, 2.7, 0.112, -0.2, 2.7, 0, -0.2, 2.7, -0.45, -0.8, 3.15, -0.8, -0.45, 3.15, -0.8, 0, 3.15, -0.112, -0.2, 2.7, -0.2, -0.112, 2.7, -0.2, 0, 2.7, -0.8, 0.45, 3.15, -0.45, 0.8, 3.15, 0, 0.8, 3.15, -0.2, 0.112, 2.7, -0.112, 0.2, 2.7, 0, 0.2, 2.7, 0.45, 0.8, 3.15, 0.8, 0.45, 3.15, 0.112, 0.2, 2.7, 0.2, 0.112, 2.7, 0.4, 0, 2.55, 0.4, -0.224, 2.55, 0.224, -0.4, 2.55, 0, -0.4, 2.55, 1.3, 0, 2.55, 1.3, -0.728, 2.55, 0.728, -1.3, 2.55, 0, -1.3, 2.55, 1.3, 0, 2.4, 1.3, -0.728, 2.4, 0.728, -1.3, 2.4, 0, -1.3, 2.4, -0.224, -0.4, 2.55, -0.4, -0.224, 2.55, -0.4, 0, 2.55, -0.728, -1.3, 2.55, -1.3, -0.728, 2.55, -1.3, 0, 2.55, -0.728, -1.3, 2.4, -1.3, -0.728, 2.4, -1.3, 0, 2.4, -0.4, 0.224, 2.55, -0.224, 0.4, 2.55, 0, 0.4, 2.55, -1.3, 0.728, 2.55, -0.728, 1.3, 2.55, 0, 1.3, 2.55, -1.3, 0.728, 2.4, -0.728, 1.3, 2.4, 0, 1.3, 2.4, 0.224, 0.4, 2.55, 0.4, 0.224, 2.55, 0.728, 1.3, 2.55, 1.3, 0.728, 2.55, 0.728, 1.3, 2.4, 1.3, 0.728, 2.4, 0, 0, 0, 1.425, 0, 0, 1.425, 0.798, 0, 0.798, 1.425, 0, 0, 1.425, 0, 1.5, 0, 0.075, 1.5, 0.84, 0.075, 0.84, 1.5, 0.075, 0, 1.5, 0.075, -0.798, 1.425, 0, -1.425, 0.798, 0, -1.425, 0, 0, -0.84, 1.5, 0.075, -1.5, 0.84, 0.075, -1.5, 0, 0.075, -1.425, -0.798, 0, -0.798, -1.425, 0, 0, -1.425, 0, -1.5, -0.84, 0.075, -0.84, -1.5, 0.075, 0, -1.5, 0.075, 0.798, -1.425, 0, 1.425, -0.798, 0, 0.84, -1.5, 0.075, 1.5, -0.84, 0.075];
      _this = _super.call(this); // number of segments per patch

      segments = Math.max(2, Math.floor(segments)); // Jim Blinn scaled the teapot down in size by about 1.3 for
      // some rendering tests. He liked the new proportions that he kept
      // the data in this form. The model was distributed with these new
      // proportions and became the norm. Trivia: comparing images of the
      // real teapot and the computer model, the ratio for the bowl of the
      // real teapot is more like 1.25, but since 1.3 is the traditional
      // value given, we use it here.

      var blinnScale = 1.3; // scale the size to be the real scaling factor

      var maxHeight = 3.15 * (blinn ? 1 : blinnScale);
      var maxHeight2 = maxHeight / 2;
      var trueSize = size / maxHeight2; // Number of elements depends on what is needed. Subtract degenerate
      // triangles at tip of bottom and lid out in advance.

      var numTriangles = bottom ? (8 * segments - 4) * segments : 0;
      numTriangles += lid ? (16 * segments - 4) * segments : 0;
      numTriangles += body ? 40 * segments * segments : 0;
      var indices = new Uint32Array(numTriangles * 3);
      var numVertices = bottom ? 4 : 0;
      numVertices += lid ? 8 : 0;
      numVertices += body ? 20 : 0;
      numVertices *= (segments + 1) * (segments + 1);
      var vertices = new Float32Array(numVertices * 3);
      var normals = new Float32Array(numVertices * 3);
      var uvs = new Float32Array(numVertices * 2); // Bezier form

      var ms = new _three.Matrix4();
      ms.set(-1.0, 3.0, -3.0, 1.0, 3.0, -6.0, 3.0, 0.0, -3.0, 3.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0);
      var g = [];
      var sp = [];
      var tp = [];
      var dsp = [];
      var dtp = []; // M * G * M matrix, sort of see
      // http://www.cs.helsinki.fi/group/goa/mallinnus/curves/surfaces.html

      var mgm = [];
      var vert = [];
      var sdir = [];
      var tdir = [];
      var norm = new _three.Vector3();
      var tcoord;
      var sval;
      var tval;
      var p;
      var dsval = 0;
      var dtval = 0;
      var normOut = new _three.Vector3();
      var gmx = new _three.Matrix4();
      var tmtx = new _three.Matrix4();
      var vsp = new _three.Vector4();
      var vtp = new _three.Vector4();
      var vdsp = new _three.Vector4();
      var vdtp = new _three.Vector4();
      var vsdir = new _three.Vector3();
      var vtdir = new _three.Vector3();
      var mst = ms.clone();
      mst.transpose(); // internal function: test if triangle has any matching vertices;
      // if so, don't save triangle, since it won't display anything.

      var notDegenerate = function notDegenerate(vtx1, vtx2, vtx3) {
        return (// if any vertex matches, return false
          !(vertices[vtx1 * 3] === vertices[vtx2 * 3] && vertices[vtx1 * 3 + 1] === vertices[vtx2 * 3 + 1] && vertices[vtx1 * 3 + 2] === vertices[vtx2 * 3 + 2] || vertices[vtx1 * 3] === vertices[vtx3 * 3] && vertices[vtx1 * 3 + 1] === vertices[vtx3 * 3 + 1] && vertices[vtx1 * 3 + 2] === vertices[vtx3 * 3 + 2] || vertices[vtx2 * 3] === vertices[vtx3 * 3] && vertices[vtx2 * 3 + 1] === vertices[vtx3 * 3 + 1] && vertices[vtx2 * 3 + 2] === vertices[vtx3 * 3 + 2])
        );
      };

      for (var i = 0; i < 3; i++) {
        mgm[i] = new _three.Matrix4();
      }

      var minPatches = body ? 0 : 20;
      var maxPatches = bottom ? 32 : 28;
      var vertPerRow = segments + 1;
      var surfCount = 0;
      var vertCount = 0;
      var normCount = 0;
      var uvCount = 0;
      var indexCount = 0;

      for (var surf = minPatches; surf < maxPatches; surf++) {
        // lid is in the middle of the data, patches 20-27,
        // so ignore it for this part of the loop if the lid is not desired
        if (lid || surf < 20 || surf >= 28) {
          // get M * G * M matrix for x,y,z
          for (var _i = 0; _i < 3; _i++) {
            // get control patches
            for (var r = 0; r < 4; r++) {
              for (var c = 0; c < 4; c++) {
                // transposed
                g[c * 4 + r] = teapotVertices[teapotPatches[surf * 16 + r * 4 + c] * 3 + _i]; // is the lid to be made larger, and is this a point on the lid
                // that is X or Y?

                if (fitLid && surf >= 20 && surf < 28 && _i !== 2) {
                  // increase XY size by 7.7%, found empirically. I don't
                  // increase Z so that the teapot will continue to fit in the
                  // space -1 to 1 for Y (Y is up for the final model).
                  g[c * 4 + r] *= 1.077;
                } // Blinn "fixed" the teapot by dividing Z by blinnScale, and that's the
                // data we now use. The original teapot is taller. Fix it:


                if (!blinn && _i === 2) {
                  g[c * 4 + r] *= blinnScale;
                }
              }
            }

            gmx.set(g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7], g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15]);
            tmtx.multiplyMatrices(gmx, ms);

            mgm[_i].multiplyMatrices(mst, tmtx);
          } // step along, get points, and output


          for (var sstep = 0; sstep <= segments; sstep++) {
            var s = sstep / segments;

            for (var tstep = 0; tstep <= segments; tstep++) {
              var t = tstep / segments; // point from basis
              // get power vectors and their derivatives

              for (p = 4, sval = tval = 1.0; p--;) {
                sp[p] = sval;
                tp[p] = tval;
                sval *= s;
                tval *= t;

                if (p === 3) {
                  dsp[p] = dtp[p] = 0.0;
                  dsval = dtval = 1.0;
                } else {
                  dsp[p] = dsval * (3 - p);
                  dtp[p] = dtval * (3 - p);
                  dsval *= s;
                  dtval *= t;
                }
              }

              vsp.fromArray(sp);
              vtp.fromArray(tp);
              vdsp.fromArray(dsp);
              vdtp.fromArray(dtp); // do for x,y,z

              for (var _i2 = 0; _i2 < 3; _i2++) {
                // multiply power vectors times matrix to get value
                tcoord = vsp.clone();
                tcoord.applyMatrix4(mgm[_i2]);
                vert[_i2] = tcoord.dot(vtp); // get s and t tangent vectors

                tcoord = vdsp.clone();
                tcoord.applyMatrix4(mgm[_i2]);
                sdir[_i2] = tcoord.dot(vtp);
                tcoord = vsp.clone();
                tcoord.applyMatrix4(mgm[_i2]);
                tdir[_i2] = tcoord.dot(vdtp);
              } // find normal


              vsdir.fromArray(sdir);
              vtdir.fromArray(tdir);
              norm.crossVectors(vtdir, vsdir);
              norm.normalize(); // if X and Z length is 0, at the cusp, so point the normal up or down, depending on patch number

              if (vert[0] === 0 && vert[1] === 0) {
                // if above the middle of the teapot, normal points up, else down
                normOut.set(0, vert[2] > maxHeight2 ? 1 : -1, 0);
              } else {
                // standard output: rotate on X axis
                normOut.set(norm.x, norm.z, -norm.y);
              } // store it all


              vertices[vertCount++] = trueSize * vert[0];
              vertices[vertCount++] = trueSize * (vert[2] - maxHeight2);
              vertices[vertCount++] = -trueSize * vert[1];
              normals[normCount++] = normOut.x;
              normals[normCount++] = normOut.y;
              normals[normCount++] = normOut.z;
              uvs[uvCount++] = 1 - t;
              uvs[uvCount++] = 1 - s;
            }
          } // save the faces


          for (var _sstep = 0; _sstep < segments; _sstep++) {
            for (var _tstep = 0; _tstep < segments; _tstep++) {
              var v1 = surfCount * vertPerRow * vertPerRow + _sstep * vertPerRow + _tstep;
              var v2 = v1 + 1;
              var v3 = v2 + vertPerRow;
              var v4 = v1 + vertPerRow; // Normals and UVs cannot be shared. Without clone(), you can see the consequences
              // of sharing if you call geometry.applyMatrix4( matrix ).

              if (notDegenerate(v1, v2, v3)) {
                indices[indexCount++] = v1;
                indices[indexCount++] = v2;
                indices[indexCount++] = v3;
              }

              if (notDegenerate(v1, v3, v4)) {
                indices[indexCount++] = v1;
                indices[indexCount++] = v3;
                indices[indexCount++] = v4;
              }
            }
          } // increment only if a surface was used


          surfCount++;
        }
      }

      _this.setIndex(new _three.BufferAttribute(indices, 1));

      _this.setAttribute('position', new _three.BufferAttribute(vertices, 3));

      _this.setAttribute('normal', new _three.BufferAttribute(normals, 3));

      _this.setAttribute('uv', new _three.BufferAttribute(uvs, 2));

      _this.computeBoundingSphere();

      return _this;
    }

    return _createClass(TeapotGeometry);
  }(_three.BufferGeometry);

  _exports.TeapotGeometry = TeapotGeometry;
});