A loader for loading an .mtl resource, used internaly by [page:OBJLoader].
The Material Template Library format (MTL) or .MTL File Format is a companion file format to .OBJ that describes surface shading
(material) properties of objects within one or more .OBJ files.
[page:LoadingManager loadingManager] — LoadingManager to use. Defaults to [page:DefaultLoadingManager DefaultLoadingManager]
Creates a new [name].
[page:String url] — A string containing the path/URL of the .mtl file.
[page:Function onLoad] — (optional) A function to be called after the loading is successfully completed. The function receives the loaded [page:MTLLoaderMaterialCreator MTLLoader.MaterialCreator] instance.
[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes.
[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.
Begin loading from url and return the loaded material.
[page:String path] — required
Set base path for resolving references. If set this path will be prepended to each loaded and found reference.
[page:String path] — required
Set base path for resolving texture references. If set this path will be prepended found texture reference. If not set and setPath is, it will be used as texture base path.
[page:String value] — required
If set, assigns the [link:https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_settings_attributes crossOrigin] attribute of the image to the value of *crossOrigin*, prior to starting the load. Default is *"anonymous"*.
[page:Object options] — required
Set of options on how to construct the materials
[page:String text] — The textual mtl structure to parse.
Parse a mtl text structure and return a [page:MTLLoaderMaterialCreator] instance.