pub unsafe extern "C" fn sfcgal_geometry_extrude_polygon_straight_skeleton(
geom: *const sfcgal_geometry_t,
building_height: f64,
roof_height: f64,
) -> *mut sfcgal_geometry_t
pub unsafe extern "C" fn sfcgal_geometry_extrude_polygon_straight_skeleton(
geom: *const sfcgal_geometry_t,
building_height: f64,
roof_height: f64,
) -> *mut sfcgal_geometry_t