pcone b1 8 4 8
pcone b2 4 2 4
ttranslate b2 0 0 8
trotate b2 0 0 2 0 0 1 180

bop b1 b2
bopcommon result

checkprops result -s empty
checkview -display result -2d -otherwise { b1 b2 } -s -path ${imagedir}/${test_image}.png