anchor.diff:  L, 13, 5           !9
   L, 5, 1            !10
   L, 5, 9            !11
  -L, 9, 16           !12
  +L, 9, 17           !12
   L, 8, 12           !13
  -L, 12, 17          !14
  +L, 12, 18          !14
   L, 10, 15          !15
   L, 11, 15          !16
   L, 15, 16          !17
  
positive.code: L, 11, 12          !21
  L, 16, 15          !22
  L, 15, 17          !23
  L, 16, 6           !24
  L, 17, 7           !25
  
  ! Areas
  
  
negative.code: K,13, 0.0, t
  K,14, 0.0, t
  K,15, vcctRegion,t
  
  K,16, L, t
  
  K,17, vcctRegion,refHlow
  K,18, vcctRegion,refHup
  
  ! Lines
  
  