OCCT

puts "============"
puts "OCC2784"
puts "============"
puts ""
######################################################
# Common and cut operations for two faces gives invalid result
######################################################
# Common and cut operations for two faces gives invalid result if one of the faces
# has a hole and other face lay in this hole (fill this hole).
######################################################
## (old topology)
## (cut)
## (common)
######################################################

############# data #############
box b1 10 20 10
box b2 1 1 1
ttranslate b2 5 5 0
explode b1 f
explode b2 f

bcut rcut1 b1_5 b2_5
checkshape rcut1

bcommon result rcut1 b2_5

regexp {Mass +: +([-0-9.+eE]+)} [sprops result] full m

if { $m != 0 } {
    puts "Error : area is not right"
}

checkview -display result -3d -path ${imagedir}/${test_image}.png