 = {
						segments: 12,
						phiStart: 0,
						phiLength: twoPi
					};

					function generateGeometry() {

						const geometry = new LatheGeometry(
							points, data.segments, data.phiStart, data.phiLength
						);

						updateGroupGeometry( mesh, geometry );

					}

					const folder = gui.addFolder( 'THREE.LatheGeometry' );

					folder.add( data, 'segments', 1, 30 ).step( 1 ).onChange( generateGeometry );
					folder.add( data, 'phiStart', 0, twoPi ).onChange( generateGeometry );
					folder.ad