                            "type": "createTileMapServiceImageryProvider"
                            }
                        }
                    },
                ]
            };

            const viewer = earth.czm.viewer;

            var boxLength = 100000.0;
            var position = Cesium.Cartesian3.fromDegrees(116.39, 39.9, 0.5*boxLength);
            var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(position);
            // 0 立方体顶点位置标号，以及坐标