在Three.js中将多个对象存储在一个json几何图形中

var jsonGeometry = new THREE.Geometry();

var geometry1 = new THREE.BoxGeometry(1, 1, 1);
var material1 = new THREE.MeshBasicMaterial({ color: 0xff0000 });
var mesh1 = new THREE.Mesh(geometry1, material1);
jsonGeometry.mergeMesh(mesh1);

var geometry2 = new THREE.SphereGeometry(0.5, 32, 32);
var material2 = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
var mesh2 = new THREE.Mesh(geometry2, material2);
jsonGeometry.mergeMesh(mesh2);

var jsonString = JSON.stringify(jsonGeometry.toJSON());

var jsonGeometry = JSON.parse(jsonString);
var geometry = new THREE.Geometry().fromJSON(jsonGeometry);
var material = new THREE.MeshBasicMaterial({ color: 0xffffff });
var mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);