text: 'use strict';
  
  /**
   * @author mrdoob / http://mrdoob.com/
   */
  
  var THREE = window.THREE || require('three');
  var OBJLoader = void 0;
  
  OBJLoader = function OBJLoader(manager) {
    this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;
  
    this.materials = null;
  
    this.regexp = {
      // v float float float
      vertex_pattern: /^v\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)/,
      // vn float float float
      normal_pattern: /^vn\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)/,
      // vt float float
      uv_pattern: /^vt\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)/,
      // f vertex vertex vertex
      face_vertex: /^f\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)(?:\s+(-?\d+))?/,
      // f vertex/uv vertex/uv vertex/uv
      face_vertex_uv: /^f\s+(-?\d+)\/(-?\d+)\s+(-?\d+)\/(-?\d+)\s+(-?\d+)\/(-?\d+)(?:\s+(-?\d+)\/(-?\d+))?/,
      // f vertex/uv/normal vertex/uv/normal vertex/uv/normal
      face_vertex_uv_normal: /^f\s+(-?\d+)\/(-?\d+)\/(-?\d+)\s+(-?\d+)\/(-?\d+)\/(-?\d+)\s+(-?\d+)\/(-?\d+)\/(-?\d+)(?:\s+(-?\d+)\/(-?\d+)\/(-?\d+))?/,
      // f vertex//normal vertex//normal vertex//normal
      face_vertex_normal: /^f\s+(-?\d+)\/\/(-?\d+)\s+(-?\d+)\/\/(-?\d+)\s+(-?\d+)\/\/(-?\d+)(?:\s+(-?\d+)\/\/(-?\d+))?/,
      // o object_name | g group_name
      object_pattern: /^[og]\s*(.+)?/,
      // s boolean
      smoothing_pattern: /^s\s+(\d+|on|off)/,
      // mtllib file_reference
      material_library_pattern: /^mtllib /,
      // usemtl material_name
      material_use_pattern: /^usemtl /
    };
  };
  
  OBJLoader.prototype = {
    constructor: OBJLoader,
  
    load: function load(url, onLoad, onProgress, onError) {
      var scope = this;
  
      var loader = new THREE.XHRLoader(scope.manager);
      loader.setPath(this.path);
      loader.load(url, function (text) {
        onLoad(scope.parse(text));
      }, onProgress, onError);
    },
  
    setPath: function setPath(value) {
      this.path = value;
    },
  
    setMaterials: function setMaterials(materials) {
      this.materials = materials;
    },
  
    _createParserState: function _createParserState() {
      var state = {
        objects: [],
        object: {},
  
        vertices: [],
        normals: [],
        uvs: [],
  
        materialLibraries: [],
  
        startObject: function startObject(name, fromDeclaration) {
          // If the current object (initial from reset) is not from a g/o declaration in the parsed
          // file. We need to use it for the first parsed g/o to keep things in sync.
          if (this.object && this.object.fromDeclaration === false) {
            this.object.name = name;
            this.object.fromDeclaration = fromDeclaration !== false;
            return;
          }
  
          if (this.object && typeof this.object._finalize === 'function') {
            this.object._finalize();
          }
  
          var previousMaterial = this.object && typeof this.object.currentMaterial === 'function' ? this.object.currentMaterial() : undefined;
  
          this.object = {
            name: name || '',
            fromDeclaration: fromDeclaration !== false,
  
            geometry: {
              vertices: [],
              normals: [],
              uvs: []
            },
            materials: [],
            smooth: true,
  
            startMaterial: function startMaterial(name, libraries) {
              var previous = this._finalize(false);
  
              // New usemtl declaration overwrites an inherited material, except if faces were declared
              // after the material, then it must be preserved for proper MultiMaterial continuation.
              if (previous && (previous.inherited || previous.groupCount <= 0)) {
                this.materials.splice(previous.index, 1);
              }
  
              var material = {
                index: this.materials.length,
                name: name || '',
                mtllib: Array.isArray(libraries) && libraries.length > 0 ? libraries[libraries.length - 1] : '',
                smooth: previous !== undefined ? previous.smooth : this.smooth,
                groupStart: previous !== undefined ? previous.groupEnd : 0,
                groupEnd: -1,
                groupCount: -1,
                inherited: false,
  
                clone: function clone(index) {
                  return {
                    index: typeof index === 'number' ? index : this.index,
                    name: this.name,
                    mtllib: this.mtllib,
                    smooth: this.smooth,
                    groupStart: this.groupEnd,
                    groupEnd: -1,
                    groupCount: -1,
                    inherited: false
                  };
                }
              };
  
              this.materials.push(material);
  
              return material;
            },
  
            currentMaterial: function currentMaterial() {
              if (this.materials.length > 0) {
                return this.materials[this.materials.length - 1];
              }
  
              return undefined;
            },
  
            _finalize: function _finalize(end) {
              var lastMultiMaterial = this.currentMaterial();
              if (lastMultiMaterial && lastMultiMaterial.groupEnd === -1) {
                lastMultiMaterial.groupEnd = this.geometry.vertices.length / 3;
                lastMultiMaterial.groupCount = lastMultiMaterial.groupEnd - lastMultiMaterial.groupStart;
                lastMultiMaterial.inherited = false;
              }
  
              // Guarantee at least one empty material, this makes the creation later more straight forward.
              if (end !== false && this.materials.length === 0) {
                this.materials.push({
                  name: '',
                  smooth: this.smooth
                });
              }
  
              return lastMultiMaterial;
            }
  
            // Inherit previous objects material.
            // Spec tells us that a declared material must be set to all objects until a new material is declared.
            // If a usemtl declaration is encountered while this new object is being parsed, it will
            // overwrite the inherited material. Exception being that there was already face declarations
            // to the inherited material, then it will be preserved for proper MultiMaterial continuation.
  
          };if (previousMaterial && previousMaterial.name && typeof previousMaterial.clone === 'function') {
            var declared = previousMaterial.clone(0);
            declared.inherited = true;
            this.object.materials.push(declared);
          }
  
          this.objects.push(this.object);
        },
  
        finalize: function finalize() {
          if (this.object && typeof this.object._finalize === 'function') {
            this.object._finalize();
          }
        },
  
        parseVertexIndex: function parseVertexIndex(value, len) {
          var index = parseInt(value, 10);
          return (index >= 0 ? index - 1 : index + len / 3) * 3;
        },
  
        parseNormalIndex: function parseNormalIndex(value, len) {
          var index = parseInt(value, 10);
          return (index >= 0 ? index - 1 : index + len / 3) * 3;
        },
  
        parseUVIndex: function parseUVIndex(value, len) {
          var index = parseInt(value, 10);
          return (index >= 0 ? index - 1 : index + len / 2) * 2;
        },
  
        addVertex: function addVertex(a, b, c) {
          var src = this.vertices;
          var dst = this.object.geometry.vertices;
  
          dst.push(src[a + 0]);
          dst.push(src[a + 1]);
          dst.push(src[a + 2]);
          dst.push(src[b + 0]);
          dst.push(src[b + 1]);
          dst.push(src[b + 2]);
          dst.push(src[c + 0]);
          dst.push(src[c + 1]);
          dst.push(src[c + 2]);
        },
  
        addVertexLine: function addVertexLine(a) {
          var src = this.vertices;
          var dst = this.object.geometry.vertices;
  
          dst.push(src[a + 0]);
          dst.push(src[a + 1]);
          dst.push(src[a + 2]);
        },
  
        addNormal: function addNormal(a, b, c) {
          var src = this.normals;
          var dst = this.object.geometry.normals;
  
          dst.push(src[a + 0]);
          dst.push(src[a + 1]);
          dst.push(src[a + 2]);
          dst.push(src[b + 0]);
          dst.push(src[b + 1]);
          dst.push(src[b + 2]);
          dst.push(src[c + 0]);
          dst.push(src[c + 1]);
          dst.push(src[c + 2]);
        },
  
        addUV: function addUV(a, b, c) {
          var src = this.uvs;
          var dst = this.object.geometry.uvs;
  
          dst.push(src[a + 0]);
          dst.push(src[a + 1]);
          dst.push(src[b + 0]);
          dst.push(src[b + 1]);
          dst.push(src[c + 0]);
          dst.push(src[c + 1]);
        },
  
        addUVLine: function addUVLine(a) {
          var src = this.uvs;
          var dst = this.object.geometry.uvs;
  
          dst.push(src[a + 0]);
          dst.push(src[a + 1]);
        },
  
        addFace: function addFace(a, b, c, d, ua, ub, uc, ud, na, nb, nc, nd) {
          var vLen = this.vertices.length;
  
          var ia = this.parseVertexIndex(a, vLen);
          var ib = this.parseVertexIndex(b, vLen);
          var ic = this.parseVertexIndex(c, vLen);
          var id = void 0;
  
          if (d === undefined) {
            this.addVertex(ia, ib, ic);
          } else {
            id = this.parseVertexIndex(d, vLen);
  
            this.addVertex(ia, ib, id);
            this.addVertex(ib, ic, id);
          }
  
          if (ua !== undefined) {
            var uvLen = this.uvs.length;
  
            ia = this.parseUVIndex(ua, uvLen);
            ib = this.parseUVIndex(ub, uvLen);
            ic = this.parseUVIndex(uc, uvLen);
  
            if (d === undefined) {
              this.addUV(ia, ib, ic);
            } else {
              id = this.parseUVIndex(ud, uvLen);
  
              this.addUV(ia, ib, id);
              this.addUV(ib, ic, id);
            }
          }
  
          if (na !== undefined) {
            // Normals are many times the same. If so, skip function call and parseInt.
            var nLen = this.normals.length;
            ia = this.parseNormalIndex(na, nLen);
  
            ib = na === nb ? ia : this.parseNormalIndex(nb, nLen);
            ic = na === nc ? ia : this.parseNormalIndex(nc, nLen);
  
            if (d === undefined) {
              this.addNormal(ia, ib, ic);
            } else {
              id = this.parseNormalIndex(nd, nLen);
  
              this.addNormal(ia, ib, id);
              this.addNormal(ib, ic, id);
            }
          }
        },
  
        addLineGeometry: function addLineGeometry(vertices, uvs) {
          this.object.geometry.type = 'Line';
  
          var vLen = this.vertices.length;
          var uvLen = this.uvs.length;
  
          for (var vi = 0, l = vertices.length; vi < l; vi++) {
            this.addVertexLine(this.parseVertexIndex(vertices[vi], vLen));
          }
  
          for (var uvi = 0, _l = uvs.length; uvi < _l; uvi++) {
            this.addUVLine(this.parseUVIndex(uvs[uvi], uvLen));
          }
        }
      };
  
      state.startObject('', false);
  
      return state;
    },
  
    parse: function parse(text) {
      var state = this._createParserState();
  
      if (text.indexOf('\r\n') !== -1) {
        // This is faster than String.split with regex that splits on both
        text = text.replace('\r\n', '\n');
      }
  
      var lines = text.split('\n');
      var line = '',
          lineFirstChar = '',
          lineSecondChar = '';
      var lineLength = 0;
      var result = [];
  
      // Faster to just trim left side of the line. Use if available.
      var trimLeft = typeof ''.trimLeft === 'function';
  
      for (var i = 0, l = lines.length; i < l; i++) {
        line = lines[i];
  
        line = trimLeft ? line.trimLeft() : line.trim();
  
        lineLength = line.length;
  
        if (lineLength === 0) continue;
  
        lineFirstChar = line.charAt(0);
  
        // @todo invoke passed in handler if any
        if (lineFirstChar === '#') continue;
  
        if (lineFirstChar === 'v') {
          lineSecondChar = line.charAt(1);
  
          if (lineSecondChar === ' ' && (result = this.regexp.vertex_pattern.exec(line)) !== null) {
            // 0                  1      2      3
            // ["v 1.0 2.0 3.0", "1.0", "2.0", "3.0"]
  
            state.vertices.push(parseFloat(result[1]), parseFloat(result[2]), parseFloat(result[3]));
          } else if (lineSecondChar === 'n' && (result = this.regexp.normal_pattern.exec(line)) !== null) {
            // 0                   1      2      3
            // ["vn 1.0 2.0 3.0", "1.0", "2.0", "3.0"]
  
            state.normals.push(parseFloat(result[1]), parseFloat(result[2]), parseFloat(result[3]));
          } else if (lineSecondChar === 't' && (result = this.regexp.uv_pattern.exec(line)) !== null) {
            // 0               1      2
            // ["vt 0.1 0.2", "0.1", "0.2"]
  
            state.uvs.push(parseFloat(result[1]), parseFloat(result[2]));
          } else {
            throw new Error("Unexpected vertex/normal/uv line: '" + line + "'");
          }
        } else if (lineFirstChar === 'f') {
          if ((result = this.regexp.face_vertex_uv_normal.exec(line)) !== null) {
            // f vertex/uv/normal vertex/uv/normal vertex/uv/normal
            // 0                        1    2    3    4    5    6    7    8    9   10         11         12
            // ["f 1/1/1 2/2/2 3/3/3", "1", "1", "1", "2", "2", "2", "3", "3", "3", undefined, undefined, undefined]
  
            state.addFace(result[1], result[4], result[7], result[10], result[2], result[5], result[8], result[11], result[3], result[6], result[9], result[12]);
          } else if ((result = this.regexp.face_vertex_uv.exec(line)) !== null) {
            // f vertex/uv vertex/uv vertex/uv
            // 0                  1    2    3    4    5    6   7          8
            // ["f 1/1 2/2 3/3", "1", "1", "2", "2", "3", "3", undefined, undefined]
  
            state.addFace(result[1], result[3], result[5], result[7], result[2], result[4], result[6], result[8]);
          } else if ((result = this.regexp.face_vertex_normal.exec(line)) !== null) {
            // f vertex//normal vertex//normal vertex//normal
            // 0                     1    2    3    4    5    6   7          8
            // ["f 1//1 2//2 3//3", "1", "1", "2", "2", "3", "3", undefined, undefined]
  
            state.addFace(result[1], result[3], result[5], result[7], undefined, undefined, undefined, undefined, result[2], result[4], result[6], result[8]);
          } else if ((result = this.regexp.face_vertex.exec(line)) !== null) {
            // f vertex vertex vertex
            // 0            1    2    3   4
            // ["f 1 2 3", "1", "2", "3", undefined]
  
            state.addFace(result[1], result[2], result[3], result[4]);
          } else {
            throw new Error("Unexpected face line: '" + line + "'");
          }
        } else if (lineFirstChar === 'l') {
          var lineParts = line.substring(1).trim().split(' ');
          var lineVertices = [],
              lineUVs = [];
  
          if (line.indexOf('/') === -1) {
            lineVertices = lineParts;
          } else {
            for (var li = 0, llen = lineParts.length; li < llen; li++) {
              var parts = lineParts[li].split('/');
  
              if (parts[0] !== '') lineVertices.push(parts[0]);
              if (parts[1] !== '') lineUVs.push(parts[1]);
            }
          }
          state.addLineGeometry(lineVertices, lineUVs);
        } else if ((result = this.regexp.object_pattern.exec(line)) !== null) {
          // o object_name
          // or
          // g group_name
  
          var name = result[0].substr(1).trim();
          state.startObject(name);
        } else if (this.regexp.material_use_pattern.test(line)) {
          // material
  
          state.object.startMaterial(line.substring(7).trim(), state.materialLibraries);
        } else if (this.regexp.material_library_pattern.test(line)) {
          // mtl file
  
          state.materialLibraries.push(line.substring(7).trim());
        } else if ((result = this.regexp.smoothing_pattern.exec(line)) !== null) {
          // smooth shading
  
          // @todo Handle files that have varying smooth values for a set of faces inside one geometry,
          // but does not define a usemtl for each face set.
          // This should be detected and a dummy material created (later MultiMaterial and geometry groups).
          // This requires some care to not create extra material on each smooth value for "normal" obj files.
          // where explicit usemtl defines geometry groups.
          // Example asset: examples/models/obj/cerberus/Cerberus.obj
  
          var value = result[1].trim().toLowerCase();
          state.object.smooth = value === '1' || value === 'on';
  
          var material = state.object.currentMaterial();
          if (material) {
            material.smooth = state.object.smooth;
          }
        } else {
          // Handle null terminated files without exception
          if (line === '\0') continue;
  
          throw new Error("Unexpected line: '" + line + "'");
        }
      }
  
      state.finalize();
  
      var container = new THREE.Group();
      container.materialLibraries = [].concat(state.materialLibraries);
  
      for (var _i = 0, _l2 = state.objects.length; _i < _l2; _i++) {
        var object = state.objects[_i];
        var geometry = object.geometry;
        var materials = object.materials;
        var isLine = geometry.type === 'Line';
  
        // Skip o/g line declarations that did not follow with any faces
        if (geometry.vertices.length === 0) continue;
  
        var buffergeometry = new THREE.BufferGeometry();
  
        buffergeometry.addAttribute('position', new THREE.BufferAttribute(new Float32Array(geometry.vertices), 3));
  
        if (geometry.normals.length > 0) {
          buffergeometry.addAttribute('normal', new THREE.BufferAttribute(new Float32Array(geometry.normals), 3));
        } else {
          buffergeometry.computeVertexNormals();
        }
  
        if (geometry.uvs.length > 0) {
          buffergeometry.addAttribute('uv', new THREE.BufferAttribute(new Float32Array(geometry.uvs), 2));
        }
  
        // Create materials
  
        var createdMaterials = [];
  
        for (var mi = 0, miLen = materials.length; mi < miLen; mi++) {
          var sourceMaterial = materials[mi];
          var _material = undefined;
  
          if (this.materials !== null) {
            _material = this.materials.create(sourceMaterial.name);
  
            // mtl etc. loaders probably can't create line materials correctly, copy properties to a line material.
            if (isLine && _material && !(_material instanceof THREE.LineBasicMaterial)) {
              var materialLine = new THREE.LineBasicMaterial();
              materialLine.copy(_material);
              _material = materialLine;
            }
          }
  
          if (!_material) {
            _material = !isLine ? new THREE.MeshPhongMaterial() : new THREE.LineBasicMaterial();
            _material.name = sourceMaterial.name;
          }
  
          if (!sourceMaterial.smooth) _material.flatShading = true;
  
          createdMaterials.push(_material);
        }
  
        // Create mesh
  
        var mesh = void 0;
  
        if (createdMaterials.length > 1) {
          for (var _mi = 0, _miLen = materials.length; _mi < _miLen; _mi++) {
            var _sourceMaterial = materials[_mi];
            buffergeometry.addGroup(_sourceMaterial.groupStart, _sourceMaterial.groupCount, _mi);
          }
  
          var multiMaterial = new THREE.MultiMaterial(createdMaterials);
          mesh = !isLine ? new THREE.Mesh(buffergeometry, multiMaterial) : new THREE.Line(buffergeometry, multiMaterial);
        } else {
          mesh = !isLine ? new THREE.Mesh(buffergeometry, createdMaterials[0]) : new THREE.Line(buffergeometry, createdMaterials[0]);
        }
  
        mesh.name = object.name;
  
        container.add(mesh);
      }
  
      return container;
    }
  };
  
  module.exports = OBJLoader;