Three.js 加载单个 .obj 模型，如何显示顶点颜色

Question

I am new to Three.js (3D) and have a simple question. I have the following code that will work properly, but I think the result lost their colors because I open the test.obj file whith 3D Buidler(WIN10), there are lots of colors on ther surface of model. why?

The Code

var loader = new THREE.OBJLoader()
loader.load( 'test.obj', function ( object ) {
    object.position.y = 0;
    scene.add( object );                
} );

I think it's vertex color, How to show it's vertex color?

var loader = new THREE.OBJLoader2()
loader.load( 'test.obj', function ( object ) {
    object.position.y = 0;
    scene.add( object );                
} );

I have tryed OBJLoader2.js , but it doesn't work, need some settings?

The result loaded by Three.js:

The result loaded by 3D Builder:

The obj file

Answer 1

use the .mtl file along with the .obj file.

var onProgress = function ( xhr ) {
                if ( xhr.lengthComputable ) {
                    var percentComplete = xhr.loaded / xhr.total * 100;
                    console.log( Math.round(percentComplete, 2) + '% downloaded' );
                }
            };

            var onError = function ( xhr ) { };

            THREE.Loader.Handlers.add( /\.dds$/i, new THREE.DDSLoader() );

            //Car model
            var mtlLoader = new THREE.MTLLoader();
            mtlLoader.setPath( '../materials/car/' );
            mtlLoader.load( 'car.mtl', function( materials ) {

                materials.preload();

                var objLoader = new THREE.OBJLoader();
                objLoader.setMaterials( materials );
                objLoader.setPath( '../materials/car/' );
                objLoader.load( 'car.obj', carObject, onProgress, onError );

            });

            function carObject(object){
                object.rotation.y = 1.55;
                object.position.z = 105;
                object.position.y = 1.15;

                object.scale.x = object.scale.y = object.scale.z = 0.15;
                    //object.rotation.x = 6.5;
                    //object.position.z = 50;

                scene.add( object );
            }
            //end car model

Answer 2

最后我发现了：我将 OBJLoader2.js 的版本更改为 1.3.0。