box b1 10 10 10
box b2 -2 -2 2 7 14 6
box b3 5 -2 2 7 14 6
bclearobjects
bcleartools
baddobjects b1
baddtools b2 b3
bfillds
bbuild r

buildbop r0 -o b1 -t b3 b2 -op common
buildbop r1 -o b1 -t b3 b2 -op fuse
buildbop r2 -o b1 -t b3 b2 -op cut
buildbop r3 -o b1 -t b3 b2 -op tuc

foreach r {r0 r1 r2 r3} {
  checkshape $r
  if {![regexp "OK" [bopcheck $r]]} {
    puts "Error: shape is self-interfered"
  }
}

checkprops r0 -s 560 -v 600
checknbshapes r0 -vertex 12 -edge 20 -wire 11 -face 11 -shell 2 -solid 2

checkprops r1 -s 888 -v 1576
checknbshapes r1 -vertex 32 -edge 50 -wire 20 -face 20 -shell 1 -solid 1

checkprops r2 -s 560 -v 400
checknbshapes r2 -vertex 20 -edge 30 -wire 14 -face 14 -shell 2 -solid 2

checkprops r3 -s 816 -v 576
checknbshapes r3 -vertex 24 -edge 40 -wire 18 -face 18 -shell 2 -solid 2