TypeError：THREE.OrbitControls不是构造函数

我从Three.js开始。现在，我发现了一个问题，需要帮助。看起来很简单，但我找不到很好的答案。问题是：即使声明使用OrbitControls.js（CODE1），即使它显示在DOM的三棵树中（图1）。当我尝试使用构造函数（代码2）时，收到错误消息：“ TypeError：THREE.OrbitControls不是构造函数”。

CODE1 :***index.html***

    
        
        
    
    

       
       
       
       
        

    
    

CODE2***:cena.js***

var cena = new THREE.Scene();

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

var renderizador = new THREE.WebGLRenderer({antialias:true});

renderizador.setSize( window.innerWidth, window.innerHeight );

document.body.appendChild( renderizador.domElement );
//----------------------------


var geometry = new THREE.BoxGeometry( 3, 1, 2 );

var material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );

var cube = new THREE.Mesh( geometry, material );

var axisHelper = new THREE.AxisHelper( 5 );
cena.add( axisHelper )
var tamanho = 10;
var elementos = 10;
var grid = new THREE.GridHelper(tamanho,elementos);
cena.add(grid);

cena.add( cube );

camera.position.z = 10;
camera.position.y = 10;
camera.position.x = 5;

var lookat_vector = new THREE.Vector3(0,0,0);
camera.lookAt(lookat_vector);
//++++++++++++++++++++++++++++++++++++++++++++++++++++++

var controle = new THREE.OrbitControls(camera, renderizador.domElement);

var render = function () {
        requestAnimationFrame( render );
        controle.update();
        cube.rotation.x += 0.01;
        cube.rotation.y +=0.01;
        cube.rotation.z +=0.03;

        renderizador.render(cena, camera);
        //controle.update();
    };

render();

您需要包括库并将cena.js脚本放在最后。脚本标签是同步加载的。