如何将3D模型加载到三个JS (JSON格式)

<script src="three.min.js"></script>
<script src="OrbitControls.js"></script>
<script src="GLTFLoader.js"></script>

var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);

var light = new THREE.DirectionalLight(0xffffff, 1);
light.position.set(1, 1, 1).normalize();
scene.add(light);

var loader = new THREE.GLTFLoader();
loader.load('model.gltf', function (gltf) {
    scene.add(gltf.scene);
}, undefined, function (error) {
    console.error(error);
});

var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

function animate() {
    requestAnimationFrame(animate);
    renderer.render(scene, camera);
}
animate();