"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
class MTLLoader extends THREE.Loader {
  constructor(manager) {
    super(manager);
  }
  /**
   * Loads and parses a MTL asset from a URL.
   *
   * @param {String} url - URL to the MTL file.
   * @param {Function} [onLoad] - Callback invoked with the loaded object.
   * @param {Function} [onProgress] - Callback for download progress.
   * @param {Function} [onError] - Callback for download errors.
   *
   * @see setPath setResourcePath
   *
   * @note In order for relative texture references to resolve correctly
   * you must call setResourcePath() explicitly prior to load.
   */
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const path = this.path === "" ? THREE.LoaderUtils.extractUrlBase(url) : this.path;
    const loader = new THREE.FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(
      url,
      function(text) {
        try {
          onLoad(scope.parse(text, path));
        } catch (e) {
          if (onError) {
            onError(e);
          } else {
            console.error(e);
          }
          scope.manager.itemError(url);
        }
      },
      onProgress,
      onError
    );
  }
  setMaterialOptions(value) {
    this.materialOptions = value;
    return this;
  }
  /**
   * Parses a MTL file.
   *
   * @param {String} text - Content of MTL file
   * @return {MaterialCreator}
   *
   * @see setPath setResourcePath
   *
   * @note In order for relative texture references to resolve correctly
   * you must call setResourcePath() explicitly prior to parse.
   */
  parse(text, path) {
    const lines = text.split("\n");
    let info = {};
    const delimiter_pattern = /\s+/;
    const materialsInfo = {};
    for (let i = 0; i < lines.length; i++) {
      let line = lines[i];
      line = line.trim();
      if (line.length === 0 || line.charAt(0) === "#") {
        continue;
      }
      const pos = line.indexOf(" ");
      let key = pos >= 0 ? line.substring(0, pos) : line;
      key = key.toLowerCase();
      let value = pos >= 0 ? line.substring(pos + 1) : "";
      value = value.trim();
      if (key === "newmtl") {
        info = { name: value };
        materialsInfo[value] = info;
      } else {
        if (key === "ka" || key === "kd" || key === "ks" || key === "ke") {
          const ss = value.split(delimiter_pattern, 3);
          info[key] = [parseFloat(ss[0]), parseFloat(ss[1]), parseFloat(ss[2])];
        } else {
          info[key] = value;
        }
      }
    }
    const materialCreator = new MaterialCreator(this.resourcePath || path, this.materialOptions);
    materialCreator.setCrossOrigin(this.crossOrigin);
    materialCreator.setManager(this.manager);
    materialCreator.setMaterials(materialsInfo);
    return materialCreator;
  }
}
class MaterialCreator {
  constructor(baseUrl = "", options = {}) {
    this.baseUrl = baseUrl;
    this.options = options;
    this.materialsInfo = {};
    this.materials = {};
    this.materialsArray = [];
    this.nameLookup = {};
    this.crossOrigin = "anonymous";
    this.side = this.options.side !== void 0 ? this.options.side : THREE.FrontSide;
    this.wrap = this.options.wrap !== void 0 ? this.options.wrap : THREE.RepeatWrapping;
  }
  setCrossOrigin(value) {
    this.crossOrigin = value;
    return this;
  }
  setManager(value) {
    this.manager = value;
  }
  setMaterials(materialsInfo) {
    this.materialsInfo = this.convert(materialsInfo);
    this.materials = {};
    this.materialsArray = [];
    this.nameLookup = {};
  }
  convert(materialsInfo) {
    if (!this.options)
      return materialsInfo;
    const converted = {};
    for (const mn in materialsInfo) {
      const mat = materialsInfo[mn];
      const covmat = {};
      converted[mn] = covmat;
      for (const prop in mat) {
        let save = true;
        let value = mat[prop];
        const lprop = prop.toLowerCase();
        switch (lprop) {
          case "kd":
          case "ka":
          case "ks":
            if (this.options && this.options.normalizeRGB) {
              value = [value[0] / 255, value[1] / 255, value[2] / 255];
            }
            if (this.options && this.options.ignoreZeroRGBs) {
              if (value[0] === 0 && value[1] === 0 && value[2] === 0) {
                save = false;
              }
            }
            break;
        }
        if (save) {
          covmat[lprop] = value;
        }
      }
    }
    return converted;
  }
  preload() {
    for (const mn in this.materialsInfo) {
      this.create(mn);
    }
  }
  getIndex(materialName) {
    return this.nameLookup[materialName];
  }
  getAsArray() {
    let index = 0;
    for (const mn in this.materialsInfo) {
      this.materialsArray[index] = this.create(mn);
      this.nameLookup[mn] = index;
      index++;
    }
    return this.materialsArray;
  }
  create(materialName) {
    if (this.materials[materialName] === void 0) {
      this.createMaterial_(materialName);
    }
    return this.materials[materialName];
  }
  createMaterial_(materialName) {
    const scope = this;
    const mat = this.materialsInfo[materialName];
    const params = {
      name: materialName,
      side: this.side
    };
    function resolveURL(baseUrl, url) {
      if (typeof url !== "string" || url === "")
        return "";
      if (/^https?:\/\//i.test(url))
        return url;
      return baseUrl + url;
    }
    function setMapForType(mapType, value) {
      if (params[mapType])
        return;
      const texParams = scope.getTextureParams(value, params);
      const map = scope.loadTexture(resolveURL(scope.baseUrl, texParams.url));
      map.repeat.copy(texParams.scale);
      map.offset.copy(texParams.offset);
      map.wrapS = scope.wrap;
      map.wrapT = scope.wrap;
      params[mapType] = map;
    }
    for (const prop in mat) {
      const value = mat[prop];
      let n;
      if (value === "")
        continue;
      switch (prop.toLowerCase()) {
        case "kd":
          params.color = new THREE.Color().fromArray(value);
          break;
        case "ks":
          params.specular = new THREE.Color().fromArray(value);
          break;
        case "ke":
          params.emissive = new THREE.Color().fromArray(value);
          break;
        case "map_kd":
          setMapForType("map", value);
          break;
        case "map_ks":
          setMapForType("specularMap", value);
          break;
        case "map_ke":
          setMapForType("emissiveMap", value);
          break;
        case "norm":
          setMapForType("normalMap", value);
          break;
        case "map_bump":
        case "bump":
          setMapForType("bumpMap", value);
          break;
        case "map_d":
          setMapForType("alphaMap", value);
          params.transparent = true;
          break;
        case "ns":
          params.shininess = parseFloat(value);
          break;
        case "d":
          n = parseFloat(value);
          if (n < 1) {
            params.opacity = n;
            params.transparent = true;
          }
          break;
        case "tr":
          n = parseFloat(value);
          if (this.options && this.options.invertTrProperty)
            n = 1 - n;
          if (n > 0) {
            params.opacity = 1 - n;
            params.transparent = true;
          }
          break;
      }
    }
    this.materials[materialName] = new THREE.MeshPhongMaterial(params);
    return this.materials[materialName];
  }
  getTextureParams(value, matParams) {
    const texParams = {
      scale: new THREE.Vector2(1, 1),
      offset: new THREE.Vector2(0, 0)
    };
    const items = value.split(/\s+/);
    let pos;
    pos = items.indexOf("-bm");
    if (pos >= 0) {
      matParams.bumpScale = parseFloat(items[pos + 1]);
      items.splice(pos, 2);
    }
    pos = items.indexOf("-s");
    if (pos >= 0) {
      texParams.scale.set(parseFloat(items[pos + 1]), parseFloat(items[pos + 2]));
      items.splice(pos, 4);
    }
    pos = items.indexOf("-o");
    if (pos >= 0) {
      texParams.offset.set(parseFloat(items[pos + 1]), parseFloat(items[pos + 2]));
      items.splice(pos, 4);
    }
    texParams.url = items.join(" ").trim();
    return texParams;
  }
  loadTexture(url, mapping, onLoad, onProgress, onError) {
    const manager = this.manager !== void 0 ? this.manager : THREE.DefaultLoadingManager;
    let loader = manager.getHandler(url);
    if (loader === null) {
      loader = new THREE.TextureLoader(manager);
    }
    if (loader.setCrossOrigin)
      loader.setCrossOrigin(this.crossOrigin);
    const texture = loader.load(url, onLoad, onProgress, onError);
    if (mapping !== void 0)
      texture.mapping = mapping;
    return texture;
  }
}
exports.MTLLoader = MTLLoader;
//# sourceMappingURL=MTLLoader.cjs.map