Javascript 在three.js中将网格添加到场景之前如何设置网格的位置
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How can I set the position of a mesh before I add it to the scene in three.js
提问by user1783292
In three.js, I want to add a mesh to a position in the scene
在three.js中，我想在场景中的某个位置添加一个网格
I've tried:
我试过了：
// mesh is a THREE.Mesh
scene is a THREE.Scene
scene.add(mesh)
scene.updateMatrixWorld(true)
mesh.matrixWorld.setPosition(new THREE.Vector3(100, 100, 100))
scene.updateMatrix()
BUT it didn't affect anything.
但它没有影响任何东西。
What should I do ?
我该怎么办 ？
回答by chsymann
i would recommend you to check the documenation over here: http://threejs.org/docs/#Reference/Objects/MeshAs you can see on the top of the docu-page, Mesh inherits from "Object3D". That means that you can use all methods or properties that are provided by Object3D. So click on the "Object3D" link on the docu-page and check the properties list. You will find propertie ".position". Click on ".position" to see what data-type it is. Paha..its Vector3.
我建议您在此处查看文档：http://threejs.org/docs/#Reference/Objects/Mesh 正如您在文档页面的顶部所见，Mesh 继承自“ Object3D”。这意味着您可以使用 Object3D 提供的所有方法或属性。所以点击文档页面上的“ Object3D”链接并检查属性列表。你会发现属性“ .position”。单击“ .position”以查看它是什么数据类型。Paha ..它的Vector3。
So try to do the following:
因此，请尝试执行以下操作：
//scene is a THREE.Scene
scene.add(mesh);
mesh.position.set(100, 100, 100);
回答by bh_earth0
i saw it on a github earlier. (three.js r71 )
之前在github上看到过。(三.js r71)
mesh.position.set(100, 100, 100);
and can be done for individuals
并且可以为个人完成
mesh.position.setX(200);
mesh.position.setZ(200);
reference: https://threejs.org/docs/#api/math/Vector3
参考：https: //threejs.org/docs/#api/math/Vector3
detailed explanation is below:
详细解释如下：
since mesh.position is "Vector3". Vector3() has setX() setY() and setZ() methods. we can use it like this.
因为 mesh.position 是“Vector3”。Vector3() 有 setX() setY() 和 setZ() 方法。我们可以这样使用它。
mesh.position = new THREE.Vector3() ; //see position is Vector3()
vector1 = new THREE.Vector3();
mesh.position.setX(100); //or this
vector1.setX(100) // because all of them is Vector3()
camera1.position.setZ(100); // or this
light1.position.setY(100) // applicable to any object.position
回答by Hitesh Sahu
I prefer to use Vector3to set position.
我更喜欢使用Vector3来设置位置。
let group = new THREE.Group();
// position of box
let position = new THREE.Vector3(10, 10, 10);
// add wooden Box
let woodenBox = new THREE.Mesh(boxGeometry, woodMaterial);
//update postion
woodenBox.position.copy(vector);
// add to scene
group.add(woodenBox)
this.scene.add(group);
