[page:Loader] →

# [name]

A loader for loading a `.obj` resource.
The [link:https://en.wikipedia.org/wiki/Wavefront_.obj_file OBJ file format] is a simple data-format that represents 3D geometry in a human readable format as the position of each vertex, the UV position of each texture coordinate vertex, vertex normals, and the faces that make each polygon defined as a list of vertices, and texture vertices.

## Import

[name] is an add-on, and must be imported explicitly. See [link:#manual/introduction/Installation Installation / Addons].

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

## Code Example

`// instantiate a loader const loader = new OBJLoader(); // load a resource loader.load( // resource URL 'models/monster.obj', // called when resource is loaded function ( object ) { scene.add( object ); }, // called when loading is in progresses function ( xhr ) { console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' ); }, // called when loading has errors function ( error ) { console.log( 'An error happened' ); } );`

## Examples

[example:webgl_loader_obj]

## Constructor

### [name]( [param:LoadingManager manager] )

[page:LoadingManager manager] — The [page:LoadingManager loadingManager] for the loader to use. Default is [page:LoadingManager THREE.DefaultLoadingManager].

Creates a new [name].

## Properties

See the base [page:Loader] class for common properties.

## Methods

See the base [page:Loader] class for common methods.

### [method:undefined load]( [param:String url], [param:Function onLoad], [param:Function onProgress], [param:Function onError] )

[page:String url] — A string containing the path/URL of the `.obj` file.
[page:Function onLoad] — (optional) A function to be called after the loading is successfully completed. The function receives the loaded [page:Object3D] as an argument.
[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The function receives a XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.
[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.

Begin loading from url and call onLoad with the parsed response content.

### [method:Object3D parse]( [param:String text] )

[page:String text] — The textual `obj` structure to parse.

Returns an [page:Object3D]. It contains the parsed meshes as [page:Mesh] and lines as [page:LineSegments].
All geometry is created as [page:BufferGeometry]. Default materials are created as [page:MeshPhongMaterial].
If an `obj` object or group uses multiple materials while declaring faces, geometry groups and an array of materials are used.

### [method:this setMaterials]( [param:MTLLoader.MaterialCreator materials] )

[page:MTLLoaderMaterialCreator MTLLoader.MaterialCreator materials] - A MaterialCreator instance.

Sets materials loaded by MTLLoader or any other supplier of a [page:MTLLoaderMaterialCreator MTLLoader.MaterialCreator].

## Source

[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/loaders/OBJLoader.js examples/jsm/loaders/OBJLoader.js]