box b1 0 0 0 1 1 1
box b2 -0.25 -0.25  0.5     0.5   0.5   1

bop b1 b2
bopcommon result

checkprops result -s 0.625
checkview -display result -2d -otherwise { b1 b2 } -s -path ${imagedir}/${test_image}.png