OCCT

# Permutation of all forms of construction
# when fusing a box and an oblong prism

# L series from right side face

vertex vp1 3 3 0
vertex vp2 8 3 0
vertex vp3 8 9 0
vertex vp4 3 9 0
edge eap vp1 vp2
edge ebp vp2 vp3
edge ecp vp3 vp4
edge edp vp4 vp1
wire wp eap ebp ecp edp
mkplane fp wp
prism ba fp 0 0 5

profile prof O 8 6 0  P -1 0 0 0 1 0  D -1 0  C 1 180  X 2  C 1 180  W
mkplane pl prof
prism ob pl 1 0 0

bfuse result ba ob

checkprops result -s 180.283
checkview -display result -2d -otherwise { ba ob } -s -path ${imagedir}/${test_image}.png