aptalks.three/blob/1e45f5238f500225ada1deb09b8bab18c1b52cf2/src/BaseObject.js#L140
                // this._createMesh(geometry, material);
                this._createGroup();
                const mesh = new THREE.Mesh(geometry, material);
                this.getObject3d().add(mesh);
                //set object3d position
                const z = layer.altitudeToVector3(altitude, altitude).x;
                const position = layer.coordinateToVector3(coordinate, z);
                this.getObject3d().p