Three.js: Applying matrix to group of objects and then updating their locations

Question

当我们将场景中的对象添加到组（现在称为Object3D（））时，如何为组对象应用正确的矩阵，以便它们的位置在场景中得到更新。

Answer 1

So, as far as I know -by default ; object automatically update their matrices if they have been added to the scene with

var object = new THREE.Object3D();

scene.add( object );

if they are the child of another object that has been added to the scene:

var object1 = new THREE.Object3D();
var object2 = new THREE.Object3D();

object1.add( object2 );
scene.add( object1 );

 //object1 and object2 will automatically update their matrices

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