if { [info exists rel_tol] } {
   puts "\nChecking triangulation area (triarea command)..."
   set rel_err [expr abs([CheckTriArea result $area_eps])]
   if { $rel_err > $rel_tol } {
      puts "Error   : area by triangles differs from the actual area by $rel_err %"
   } else {
      if { $rel_tol > 1 && $rel_tol < 100 } {
        puts "Error: Improvement: The current area difference is $rel_err instead of $rel_tol"
      }
   }
}

if { [isdraw result] } {
  if { [info exists 2dviewer] } {
    clear
    smallview
    donly result
    fit
    xwd $imagedir/${test_image}.png
  }
  if { [info exists 3dviewer] } {
    #for multiview support: dump result from all opened views
    set view_str [vviewlist long]
    if { [llength ${view_str}] == 0 } {
       vinit
       set view_str [vviewlist long]
    }
    set view_list [regexp -all -inline {\S+} $view_str]
    foreach {view_name} $view_list {
      vactivate $view_name
      vclear
      vdisplay result
      vsetdispmode 1
      vfit
      vzfit
      vdump $imagedir/${test_image}_[regsub -all {/} $view_name {_}].png
    }
  }
}

if { [info exists only_screen] } {
  #for multiview support: dump result from all opened views
  set view_str [vviewlist long]
  set view_list [regexp -all -inline {\S+} $view_str]
  foreach {view_name} $view_list {
    vactivate $view_name
    vdump $imagedir/${test_image}_[regsub -all {/} $view_name {_}].png
  }
}

if { [info exists only_screen_axo] } {
   xwd $imagedir/${test_image}.png
}

# to end a test script
puts "TEST COMPLETED"