如何在three.js中使用来自mtlLoader和objLoader的多个纹理？

const mtlLoader = new THREE.MTLLoader();
mtlLoader.load('model.mtl', (materials) => {
  materials.preload();
  
  const objLoader = new THREE.OBJLoader();
  objLoader.setMaterials(materials);
  
  // 继续加载.obj文件
});

objLoader.load('model.obj', (object) => {
  // 将模型添加到场景中
  scene.add(object);
});

mtlLoader.load('model.mtl', (materials) => {
  materials.preload();
  
  const objLoader = new THREE.OBJLoader();
  objLoader.setMaterials(materials);
  
  objLoader.load('model.obj', (object) => {
    object.traverse((child) => {
      if (child instanceof THREE.Mesh) {
        const material = child.material;
        if (material.map) {
          // 将纹理应用到模型上
          child.material.map = material.map;
        }
      }
    });
    
    // 将模型添加到场景中
    scene.add(object);
  });
});