Preparing the 3D Model
Before we can load a 3D model in Three.js, we need to prepare the model itself. The most common format for 3D models is the .obj file format, which can be exported from most 3D modeling software programs. Once we have our 3D model in the .obj file format, we need to make sure that it includes all of the necessary textures and materials.Loading the 3D Model in Three.js
Once we have our 3D model prepared, we can begin the process of loading it into Three.js. The first step is to create a new instance of the THREE.OBJLoader object. This object will be responsible for parsing the .obj file and creating a Three.js mesh object that we can use to render the 3D model.var loader = new THREE.OBJLoader();
loader.load('path/to/model.obj', function (object) {// Callback function});
scene.add(object);
Loading Textures and Materials
If our 3D model includes textures and materials, we will need to load them separately and apply them to the mesh object. We can do this using the THREE.TextureLoader and THREE.MTLLoader objects.The TextureLoader object is responsible for loading image files that will be used as textures in our 3D model. We can create a new instance of this object and pass in the path to the texture file.var textureLoader = new THREE.TextureLoader();var texture = textureLoader.load('path/to/texture.jpg');
var material = new THREE.MeshPhongMaterial({map: texture});var object = new THREE.Mesh(geometry, material);
var materialLoader = new THREE.MTLLoader();materialLoader.load('path/to/materials.mtl', function (materials) {// Callback function});
var meshMaterial = new THREE.MeshFaceMaterial(materials.materials);var object = new THREE.Mesh(geometry, meshMaterial);