puts "REQUIRED All: Faulty shapes in variables faulty_1 to faulty_2"

box b1 -15 0 0 20 5 5
box b2 5 5 20

shape s1 So
shape s2 So
shape sh1 Sh
shape sh2 Sh

foreach f [lrange [explode b1 f] 1 5] { add $f sh1 }
foreach f [lrange [explode b2 f] 0 4] { add $f sh2 }

add sh1 s1
add sh2 s2

bclearobjects
bcleartools
baddobjects s1
baddtools s2
bfillds

bbop r0 0
bbop r1 1
bbop r2 2
bbop r3 3

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

checknbshapes r0 -vertex 8 -edge 12 -wire 6 -face 6 -shell 1 -solid 1
checkprops r0 -s 150

checknbshapes r1 -vertex 16 -edge 28 -wire 12 -face 12 -shell 1 -solid 1
checkprops r1 -s 700

foreach r {r2 r3} {
  checknbshapes $r -vertex 8 -edge 12 -wire 5 -face 5 -shell 1 -solid 1
  checkprops $r -s 325
}