box b1 0 0 0 1 1 1 dset a30 atan2(1,2)*180/pi dset r sqrt(5)*0.5 box b2 0 0.25 0 r 0.5 1 trotate b2 0 0.25 0 0 0 1 a30 bop b1 b2 bopfuse result set square 6.58166