puts "========"
puts "0030645: Modeling Algorithms - B-spline segmentation produces wrong parametrization"
puts "========"
puts ""

restore [locate_data_file bug30645.brep] result

set tolerance 1.e-9
segsur result 13.527990713022374 14.030423915738853 54.831990159753303 59.000000000000028 $tolerance

set surf [dump result]

regexp {VKnots +:\n(.*)} $surf full vknots
set is_different_knots 1
set vknots_list {}
while { "$vknots" != "\n\n" && $is_different_knots } {
  regexp { +([0-9]+) +: +([-0-9.+eE]+) *([0-9]+)\n(.*)} $vknots full index knot weight rest
  foreach k $vknots_list {
    if { [expr abs($k - $knot)] < $tolerance } {
      set is_different_knots 0
    }
  }

  lappend vknots_list $knot
  set vknots $rest
}

if { $is_different_knots } {
  puts "OK: all knots are different"
} else {
  puts "ERROR: segment has knots too close"
}