node_modules/three/examples/jsm/loaders/MTLLoader.d.ts

import {
  Material,
  LoadingManager,
  Mapping,
  EventDispatcher,
  BufferGeometry,
  Side,
  Texture,
  Vector2,
  Wrapping
} from '../../../src/Three';

export interface MaterialCreatorOptions {
  /**
   * side: Which side to apply the material
   * THREE.FrontSide (default), THREE.BackSide, THREE.DoubleSide
   */
  side?: Side;
  /*
   * wrap: What type of wrapping to apply for textures
   * THREE.RepeatWrapping (default), THREE.ClampToEdgeWrapping, THREE.MirroredRepeatWrapping
   */
  wrap?: Wrapping;
  /*
   * normalizeRGB: RGBs need to be normalized to 0-1 from 0-255
   * Default: false, assumed to be already normalized
   */
  normalizeRGB?: boolean;
  /*
   * ignoreZeroRGBs: Ignore values of RGBs (Ka,Kd,Ks) that are all 0's
   * Default: false
   */
  ignoreZeroRGBs?: boolean;
  /*
   * invertTrProperty: Use values 1 of Tr field for fully opaque. This option is useful for obj
   * exported from 3ds MAX, vcglib or meshlab.
   * Default: false
   */
  invertTrProperty?: boolean;
}

export class MTLLoader extends EventDispatcher {
  constructor(manager?: LoadingManager);
  manager: LoadingManager;
  materialOptions: MaterialCreatorOptions;
  path: string;
  texturePath: string;
  crossOrigin: boolean;

  load(url: string, onLoad: (materialCreator: MaterialCreator) => void, onProgress?: (event: ProgressEvent) => void, onError?: (event: ErrorEvent) => void): void;
  parse(text: string) : MaterialCreator;
  setPath(path: string) : void;
  setTexturePath(path: string) : void;
  setBaseUrl(path: string) : void;
  setCrossOrigin(value: boolean) : void;
  setMaterialOptions(value: MaterialCreatorOptions) : void;
}

export interface MaterialInfo {
  ks?: number[];
  kd?: number[];
  ke?: number[];
  map_kd?: string;
  map_ks?: string;
  map_ke?: string;
  norm?: string;
  map_bump?: string;
  bump?: string;
  map_d?: string;
  ns?: number;
  d?: number;
  tr?: number;
}

export interface TexParams {
  scale: Vector2;
  offset: Vector2;
  url: string;
}

export class MaterialCreator {
  constructor(baseUrl?: string, options?: MaterialCreatorOptions);

  baseUrl : string;
  options : MaterialCreatorOptions;
  materialsInfo : {[key: string]: MaterialInfo};
  materials : {[key: string]: Material};
  private materialsArray : Material[];
  nameLookup : {[key: string]: number};
  side : Side;
  wrap : Wrapping;

  setCrossOrigin( value: boolean ) : void;
  setManager( value: LoadingManager ) : void;
  setMaterials( materialsInfo: {[key: string]: MaterialInfo} ) : void;
  convert( materialsInfo: {[key: string]: MaterialInfo} ) : {[key: string]: MaterialInfo};
  preload() : void;
  getIndex( materialName: string ) : Material;
  getAsArray() : Material[];
  create( materialName: string ) : Material;
  createMaterial_( materialName: string ) : Material;
  getTextureParams( value: string, matParams: any ) : TexParams;
  loadTexture(url: string, mapping?: Mapping, onLoad?: (bufferGeometry: BufferGeometry) => void, onProgress?: (event: ProgressEvent) => void, onError?: (event: ErrorEvent) => void): Texture;
}