如果将模型放在小游戏项目下一起打包，在真机上可以正常加载。

但是，如果把模型文件放在远端服务器，下载回来放入wx.env.USER_DATA_PATH目录后就无法加载。

var loader = new THREE.GLTFLoader();

// Load a glTF resource

loader.load(

// resource URL

wx.env.USER_DATA_PATH + '/res/penguin.gltf',

// called when the resource is loaded

function ( gltf ) {

let gltfScene : THREE.Scene = gltf.scene;

let gltfMesh  = gltfScene.children[0].children[1] as THREE.Mesh;

PGeometry = gltfMesh;

console.log(gltf);

Anim = gltf.animations[0] as THREE.AnimationClip;

RootBone = gltfScene.children[0] as THREE.Bone;

RootBone.scale.set(3, 3, 3);

RootBone.position.set(0,0,-5);

scene.add(RootBone);

mixer = new THREE.AnimationMixer(RootBone);

let action = mixer.clipAction(Anim);

action.play();

},

// called while loading is progressing

function ( xhr ) {

console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' );

},

// called when loading has errors

function ( error ) {

console.log( 'An error happened: ' + error );

}

);

}