pub unsafe extern "C" fn graphene_vec3_init(
v: *mut graphene_vec3_t,
x: c_float,
y: c_float,
z: c_float,
) -> *mut graphene_vec3_t
pub unsafe extern "C" fn graphene_vec3_init(
v: *mut graphene_vec3_t,
x: c_float,
y: c_float,
z: c_float,
) -> *mut graphene_vec3_t