pub unsafe extern "C" fn sfcgal_geometry_buffer3d(
geom: *const sfcgal_geometry_t,
radius: f64,
segments: c_int,
buffer_type: sfcgal_buffer3d_type_t,
) -> *mut sfcgal_geometry_t
pub unsafe extern "C" fn sfcgal_geometry_buffer3d(
geom: *const sfcgal_geometry_t,
radius: f64,
segments: c_int,
buffer_type: sfcgal_buffer3d_type_t,
) -> *mut sfcgal_geometry_t