pub unsafe extern "C" fn dBoxBox(
p1: *mut f64,
R1: *mut f64,
side1: *mut f64,
p2: *mut f64,
R2: *mut f64,
side2: *mut f64,
normal: *mut f64,
depth: *mut f64,
return_code: *mut c_int,
flags: c_int,
contact: *mut dContactGeom,
skip: c_int,
) -> c_int