three.js - mesh group example? (THREE.Object3D() advanced)The dragging will be a bit more tricky because you need to work out where would the x/y positions of the mouse on the screen (screen space) will be in the 3D world, then you will need to cast a ray and check if it intersects the object you want to drag. I presume this will be a different question. Setting object hierarchy is fairly simple. As you hinted, you will use a THREE.Object3D instance to n
