es = new Uint16Array([
                0, 1, 2, 0, 2, 3,
                4, 5, 6, 4, 6, 7,
                8, 9, 10, 8, 10, 11,
                12, 13, 14, 12, 14, 15,
                16, 17, 18, 16, 18, 19,
                20, 21, 22, 20, 22, 23,
            ]);
            // 5 创建Primitive
            var myBox = viewer.scene.primitives.add(new Cesium.Primitive({
                geometryInstances: new Cesium.GeometryInstance({
                    geometry: new Cesium.Geometry({
           