Function spice_sys::pxfrm2_c

pub unsafe extern "C" fn pxfrm2_c(
    from: *const c_char, 
    to: *const c_char, 
    etfrom: c_double, 
    ett0: c_double, 
    rotate: *mut *mut c_double
)

returns the 3x3 matrix rotating a position vector from one frame at a specified epoch to another frame at a different epoch.