puts "================================================="
puts "0032874: IsParallel() method of Extrema_ExtCC does not give same results in OCC 7.6.0 vs OCC 7.5.0"
puts "================================================="
puts ""

set radius 0.001
set distExpected 0.00001
circle c1 0 0 0 $radius
circle c2 0 0 0 $radius+$distExpected

set start {0.0 0.5*pi pi 1.5*pi 2.0*pi}
set delta {pi/4.0 pi/3.0 pi/2.0 0.55*pi 0.99*pi pi 1.1*pi}

foreach f $start {
  foreach d $delta {
    trim cc1 c1 $f $f+$d
    trim cc2 c2 $f $f+$d

    set extr [extrema cc1 cc2]
    if {[regexp {Infinite number of extremas, distance = ([-0-9.+eE]+)} $extr full dist]} {
      if {[expr abs($dist - $distExpected)] < 1.e-7} {
        puts "OK"
      } else {
        puts "Error: wrong distance $dist instead of $distExpected expected"
      }
    } else {
      puts "Error: non-parallel curves"
    }
  }
}