(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.VOXLoader = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _three) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.VOXMesh = _exports.VOXLoader = _exports.VOXDataTexture3D = 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; }

  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); }

  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

  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); }

  var VOXLoader = /*#__PURE__*/function (_Loader) {
    _inherits(VOXLoader, _Loader);

    var _super = _createSuper(VOXLoader);

    function VOXLoader() {
      _classCallCheck(this, VOXLoader);

      return _super.apply(this, arguments);
    }

    _createClass(VOXLoader, [{
      key: "load",
      value: function load(url, onLoad, onProgress, onError) {
        var scope = this;
        var loader = new _three.FileLoader(scope.manager);
        loader.setPath(scope.path);
        loader.setResponseType('arraybuffer');
        loader.setRequestHeader(scope.requestHeader);
        loader.load(url, function (buffer) {
          try {
            onLoad(scope.parse(buffer));
          } catch (e) {
            if (onError) {
              onError(e);
            } else {
              console.error(e);
            }

            scope.manager.itemError(url);
          }
        }, onProgress, onError);
      }
    }, {
      key: "parse",
      value: function parse(buffer) {
        var data = new DataView(buffer);
        var id = data.getUint32(0, true);
        var version = data.getUint32(4, true);

        if (id !== 542658390 || version !== 150) {
          console.error('Not a valid VOX file');
          return;
        }

        var DEFAULT_PALETTE = [0x00000000, 0xffffffff, 0xffccffff, 0xff99ffff, 0xff66ffff, 0xff33ffff, 0xff00ffff, 0xffffccff, 0xffccccff, 0xff99ccff, 0xff66ccff, 0xff33ccff, 0xff00ccff, 0xffff99ff, 0xffcc99ff, 0xff9999ff, 0xff6699ff, 0xff3399ff, 0xff0099ff, 0xffff66ff, 0xffcc66ff, 0xff9966ff, 0xff6666ff, 0xff3366ff, 0xff0066ff, 0xffff33ff, 0xffcc33ff, 0xff9933ff, 0xff6633ff, 0xff3333ff, 0xff0033ff, 0xffff00ff, 0xffcc00ff, 0xff9900ff, 0xff6600ff, 0xff3300ff, 0xff0000ff, 0xffffffcc, 0xffccffcc, 0xff99ffcc, 0xff66ffcc, 0xff33ffcc, 0xff00ffcc, 0xffffcccc, 0xffcccccc, 0xff99cccc, 0xff66cccc, 0xff33cccc, 0xff00cccc, 0xffff99cc, 0xffcc99cc, 0xff9999cc, 0xff6699cc, 0xff3399cc, 0xff0099cc, 0xffff66cc, 0xffcc66cc, 0xff9966cc, 0xff6666cc, 0xff3366cc, 0xff0066cc, 0xffff33cc, 0xffcc33cc, 0xff9933cc, 0xff6633cc, 0xff3333cc, 0xff0033cc, 0xffff00cc, 0xffcc00cc, 0xff9900cc, 0xff6600cc, 0xff3300cc, 0xff0000cc, 0xffffff99, 0xffccff99, 0xff99ff99, 0xff66ff99, 0xff33ff99, 0xff00ff99, 0xffffcc99, 0xffcccc99, 0xff99cc99, 0xff66cc99, 0xff33cc99, 0xff00cc99, 0xffff9999, 0xffcc9999, 0xff999999, 0xff669999, 0xff339999, 0xff009999, 0xffff6699, 0xffcc6699, 0xff996699, 0xff666699, 0xff336699, 0xff006699, 0xffff3399, 0xffcc3399, 0xff993399, 0xff663399, 0xff333399, 0xff003399, 0xffff0099, 0xffcc0099, 0xff990099, 0xff660099, 0xff330099, 0xff000099, 0xffffff66, 0xffccff66, 0xff99ff66, 0xff66ff66, 0xff33ff66, 0xff00ff66, 0xffffcc66, 0xffcccc66, 0xff99cc66, 0xff66cc66, 0xff33cc66, 0xff00cc66, 0xffff9966, 0xffcc9966, 0xff999966, 0xff669966, 0xff339966, 0xff009966, 0xffff6666, 0xffcc6666, 0xff996666, 0xff666666, 0xff336666, 0xff006666, 0xffff3366, 0xffcc3366, 0xff993366, 0xff663366, 0xff333366, 0xff003366, 0xffff0066, 0xffcc0066, 0xff990066, 0xff660066, 0xff330066, 0xff000066, 0xffffff33, 0xffccff33, 0xff99ff33, 0xff66ff33, 0xff33ff33, 0xff00ff33, 0xffffcc33, 0xffcccc33, 0xff99cc33, 0xff66cc33, 0xff33cc33, 0xff00cc33, 0xffff9933, 0xffcc9933, 0xff999933, 0xff669933, 0xff339933, 0xff009933, 0xffff6633, 0xffcc6633, 0xff996633, 0xff666633, 0xff336633, 0xff006633, 0xffff3333, 0xffcc3333, 0xff993333, 0xff663333, 0xff333333, 0xff003333, 0xffff0033, 0xffcc0033, 0xff990033, 0xff660033, 0xff330033, 0xff000033, 0xffffff00, 0xffccff00, 0xff99ff00, 0xff66ff00, 0xff33ff00, 0xff00ff00, 0xffffcc00, 0xffcccc00, 0xff99cc00, 0xff66cc00, 0xff33cc00, 0xff00cc00, 0xffff9900, 0xffcc9900, 0xff999900, 0xff669900, 0xff339900, 0xff009900, 0xffff6600, 0xffcc6600, 0xff996600, 0xff666600, 0xff336600, 0xff006600, 0xffff3300, 0xffcc3300, 0xff993300, 0xff663300, 0xff333300, 0xff003300, 0xffff0000, 0xffcc0000, 0xff990000, 0xff660000, 0xff330000, 0xff0000ee, 0xff0000dd, 0xff0000bb, 0xff0000aa, 0xff000088, 0xff000077, 0xff000055, 0xff000044, 0xff000022, 0xff000011, 0xff00ee00, 0xff00dd00, 0xff00bb00, 0xff00aa00, 0xff008800, 0xff007700, 0xff005500, 0xff004400, 0xff002200, 0xff001100, 0xffee0000, 0xffdd0000, 0xffbb0000, 0xffaa0000, 0xff880000, 0xff770000, 0xff550000, 0xff440000, 0xff220000, 0xff110000, 0xffeeeeee, 0xffdddddd, 0xffbbbbbb, 0xffaaaaaa, 0xff888888, 0xff777777, 0xff555555, 0xff444444, 0xff222222, 0xff111111];
        var i = 8;
        var chunk;
        var chunks = [];

        while (i < data.byteLength) {
          var _id = '';

          for (var j = 0; j < 4; j++) {
            _id += String.fromCharCode(data.getUint8(i++, true));
          }

          var chunkSize = data.getUint32(i, true);
          i += 4;
          data.getUint32(i, true);
          i += 4; // childChunks

          if (_id === 'SIZE') {
            var x = data.getUint32(i, true);
            i += 4;
            var y = data.getUint32(i, true);
            i += 4;
            var z = data.getUint32(i, true);
            i += 4;
            chunk = {
              palette: DEFAULT_PALETTE,
              size: {
                x: x,
                y: y,
                z: z
              }
            };
            chunks.push(chunk);
            i += chunkSize - 3 * 4;
          } else if (_id === 'XYZI') {
            var numVoxels = data.getUint32(i, true);
            i += 4;
            chunk.data = new Uint8Array(buffer, i, numVoxels * 4);
            i += numVoxels * 4;
          } else if (_id === 'RGBA') {
            var palette = [0];

            for (var _j = 0; _j < 256; _j++) {
              palette[_j + 1] = data.getUint32(i, true);
              i += 4;
            }

            chunk.palette = palette;
          } else {
            // console.log( id, chunkSize, childChunks );
            i += chunkSize;
          }
        }

        return chunks;
      }
    }]);

    return VOXLoader;
  }(_three.Loader);

  _exports.VOXLoader = VOXLoader;

  var VOXMesh = /*#__PURE__*/function (_Mesh) {
    _inherits(VOXMesh, _Mesh);

    var _super2 = _createSuper(VOXMesh);

    function VOXMesh(chunk) {
      _classCallCheck(this, VOXMesh);

      var data = chunk.data;
      var size = chunk.size;
      var palette = chunk.palette; //

      var vertices = [];
      var colors = [];
      var nx = [0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1];
      var px = [1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0];
      var py = [0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1];
      var ny = [0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0];
      var nz = [0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0];
      var pz = [0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1];

      function add(tile, x, y, z, r, g, b) {
        x -= size.x / 2;
        y -= size.z / 2;
        z += size.y / 2;

        for (var i = 0; i < 18; i += 3) {
          vertices.push(tile[i + 0] + x, tile[i + 1] + y, tile[i + 2] + z);
          colors.push(r, g, b);
        }
      } // Store data in a volume for sampling


      var offsety = size.x;
      var offsetz = size.x * size.y;
      var array = new Uint8Array(size.x * size.y * size.z);

      for (var j = 0; j < data.length; j += 4) {
        var x = data[j + 0];
        var y = data[j + 1];
        var z = data[j + 2];
        var index = x + y * offsety + z * offsetz;
        array[index] = 255;
      } // Construct geometry


      var hasColors = false;

      for (var _j2 = 0; _j2 < data.length; _j2 += 4) {
        var _x = data[_j2 + 0];
        var _y = data[_j2 + 1];
        var _z = data[_j2 + 2];
        var c = data[_j2 + 3];
        var hex = palette[c];
        var r = (hex >> 0 & 0xff) / 0xff;
        var g = (hex >> 8 & 0xff) / 0xff;
        var b = (hex >> 16 & 0xff) / 0xff;
        if (r > 0 || g > 0 || b > 0) hasColors = true;

        var _index = _x + _y * offsety + _z * offsetz;

        if (array[_index + 1] === 0 || _x === size.x - 1) add(px, _x, _z, -_y, r, g, b);
        if (array[_index - 1] === 0 || _x === 0) add(nx, _x, _z, -_y, r, g, b);
        if (array[_index + offsety] === 0 || _y === size.y - 1) add(ny, _x, _z, -_y, r, g, b);
        if (array[_index - offsety] === 0 || _y === 0) add(py, _x, _z, -_y, r, g, b);
        if (array[_index + offsetz] === 0 || _z === size.z - 1) add(pz, _x, _z, -_y, r, g, b);
        if (array[_index - offsetz] === 0 || _z === 0) add(nz, _x, _z, -_y, r, g, b);
      }

      var geometry = new _three.BufferGeometry();
      geometry.setAttribute('position', new _three.Float32BufferAttribute(vertices, 3));
      geometry.computeVertexNormals();
      var material = new _three.MeshStandardMaterial();

      if (hasColors) {
        geometry.setAttribute('color', new _three.Float32BufferAttribute(colors, 3));
        material.vertexColors = true;
      }

      return _super2.call(this, geometry, material);
    }

    return _createClass(VOXMesh);
  }(_three.Mesh);

  _exports.VOXMesh = VOXMesh;

  var VOXDataTexture3D = /*#__PURE__*/function (_DataTexture3D) {
    _inherits(VOXDataTexture3D, _DataTexture3D);

    var _super3 = _createSuper(VOXDataTexture3D);

    function VOXDataTexture3D(chunk) {
      var _this;

      _classCallCheck(this, VOXDataTexture3D);

      var data = chunk.data;
      var size = chunk.size;
      var offsety = size.x;
      var offsetz = size.x * size.y;
      var array = new Uint8Array(size.x * size.y * size.z);

      for (var j = 0; j < data.length; j += 4) {
        var x = data[j + 0];
        var y = data[j + 1];
        var z = data[j + 2];
        var index = x + y * offsety + z * offsetz;
        array[index] = 255;
      }

      _this = _super3.call(this, array, size.x, size.y, size.z);
      _this.format = _three.RedFormat;
      _this.minFilter = _three.NearestFilter;
      _this.magFilter = _three.LinearFilter;
      _this.unpackAlignment = 1;
      return _this;
    }

    return _createClass(VOXDataTexture3D);
  }(_three.DataTexture3D);

  _exports.VOXDataTexture3D = VOXDataTexture3D;
});