如何在three.js中通过名称或id访问场景，没有scene.childs只访问场景

Question

我试试这个three.js how to get scene by id(name)

我得到了这个错误

Uncaught : THREE.getObjectByName不是函数

为什么我不能用名字或身份进入现场？

密码是

// setup scenes
var scene-1 = new THREE.Scene();
scene-1.add('cube_red');

var scene-2 = new THREE.Scene();
scene-2.add('cube_green');

// get scenes by name
var sceneObj = THREE.Object3D.getObjectByName("scene-1");
console.log(sceneObj.userData.someProp);

// or 

selectedScene = THREE.Object3D.getObjectByName("scene-1");

有什么建议吗？

Answer 1

变量名中不能有-1或-2。

Answer 2

您发布的代码无效。但这会给出与您所得到的错误相同的错误：

var scene1 = new THREE.Scene();
var sceneObj = THREE.Object3D.getObjectByName("scene1");

在使用getObjectByName之前，需要实例化一个对象。这将起作用：

//create a Scene
var scene1 = new THREE.Scene();

//create an Object3D
var object1 = new THREE.Object3D();

//give the object a name. By default objects in three don't have names
//but you can add one manually
object1.name = 'obj1';

//add the object as a child of the scene
scene1.add(object1);

//now search through the scene's children for an object called 'obj1'
var obj1 = scene1.getObjectByName('obj1');

console.log(object1 === obj1); //true