                               "maximumScale": 20000,
                                "xbsjPosition": [2.0313887163962, 0.6963863715457375, 41.7],
                            },
                            "ref": "model1",
                        }
                    ]
                }

                var model1 = earth.sceneTree.$refs.model1.czmObject;

                // 设置相机位置
                // earth.camera.position.toString()和earth.camera.toAllJSONStr()这两个方法可获取相机位