pcylinder c1 2 5 profile p x 1 y 1 x -1 y -1 trotate p 0 0 0 1 0 0 90 trotate p 0 0 0 0 0 1 90 ttranslate p 0 -3 0.5 explode c1 f explode p e featrevol c1 p p 0 0 0.5 0 0 1 1 1 addslide revol p_2 c1_1 featperformval revol result 360 set square 125.664