import {BoxGeometry, Mesh, SphereGeometry} from 'three'; export class SphereObject3D extends Mesh { constructor(material) { super(sphereGeometry, material); } } export class BoxObject3D extends Mesh { constructor(material) { super(boxGeometry, material); } } const sphereGeometry = new SphereGeometry( 1 ); const boxGeometry = new BoxGeometry( 1, 1, 1 );