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title: MTLLoader category: Addons layout: docs

MTLLoader

A loader for the MTL format.

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.

Code Example

const loader = new MTLLoader();
const materials = await loader.loadAsync( 'models/obj/male02/male02.mtl' );
const objLoader = new OBJLoader();
objLoader.setMaterials( materials );

Import

MTLLoader is an addon, and must be imported explicitly, see Installation#Addons.

import { MTLLoader } from 'three/addons/loaders/MTLLoader.js';

Constructor

new MTLLoader()

Methods

.load( url : string, onLoad : function, onProgress : onProgressCallback, onError : onErrorCallback )

Starts loading from the given URL and passes the loaded MTL asset to the onLoad() callback.

url | The path/URL of the file to be loaded. This can also be a data URI.
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onLoad | Executed when the loading process has been finished.
onProgress | Executed while the loading is in progress.
onError | Executed when errors occur.

Overrides: Loader#load

.parse( text : string, path : string ) : MaterialCreator

Parses the given MTL data and returns the resulting material creator.

text | The raw MTL data as a string.
---|---
path | The URL base path.

Overrides: Loader#parse

Returns: The material creator.

.setMaterialOptions( value : MTLLoader~MaterialOptions ) : MTLLoader

Sets the material options.

value | The material options.
---|---

Returns: A reference to this loader.

Type Definitions

.MaterialOptions

Material options of MTLLoader.

side
FrontSide | BackSide | DoubleSide | Which side to apply the material. Default is FrontSide.
---|---
wrap
RepeatWrapping | ClampToEdgeWrapping | MirroredRepeatWrapping | What type of wrapping to apply for textures. Default is RepeatWrapping.
normalizeRGB
boolean | Whether RGB colors should be normalized to 0-1 from 0-255. Default is false.
ignoreZeroRGBs
boolean | Ignore values of RGBs (Ka,Kd,Ks) that are all 0's. Default is false.

Source

examples/jsm/loaders/MTLLoader.js