加载fbx模型动画无法播放，也没有报错，请帮忙解答

[lzshenpan]

   var loader = new THREE.FBXLoader();
    let threeLayer = this.threeLayer
    loader.load('/3dobj/test.fbx', object => {
        console.log("object drone")
        object.scale.set(5, 5, 5);
        object.rotation.x = Math.PI / 2
        object.mixer = new THREE.AnimationMixer(object);
        // mixers.push(object.mixer);
        var action = object.mixer.clipAction(object.animations[0]);
        action.play()
        object.traverse(function (child) {
            if (child.isMesh) {
                child.material.color.set("#ff0000")
                child.material.side = THREE.DoubleSide
                //发光材质
                child.material.emissive = new THREE.Color(1, 1, 1)
                child.material.emissiveIntensity = 0.5;
                child.material.emissiveMap = child.material.map;
                // this.childMesh = child
            }
        });

[deyihu]

请给个完整得例子