OCCT

## Extension of /users/skv/testref/cd1/ED/cto/001/C1
## with inverted constructions

vertex v1 0 0 0
vertex v2 2 0 0
vertex v3 2 2 0
vertex v4 0 2 0

edge e1 v1 v2
edge e2 v2 v3
edge e3 v3 v4
edge e4 v4 v1

wire wa e1 e2 e3 e4
mkplane fa wa
prism ba fa 0 0 2


vertex v5 0 0 1
vertex v6 1 0 1
vertex v7 1 1 1
vertex v8 0 1 1

edge e5 v5 v6
edge e6 v6 v7
edge e7 v7 v8
edge e8 v8 v5

wire wb e5 e6 e7 e8
mkplane fb wb
prism bb fb 0 0 -1

bcommon result ba bb

checkprops result -s 6
checkview -display result -2d -s -otherwise { ba bb } -path ${imagedir}/${test_image}.png