puts "============"
puts "OCC23706"
puts "============"
puts ""
#########################################################################
# Cannot project point on curve
#########################################################################

bsplinecurve r1 2 5 1 3 2 1 3 1 4 1 5 3 2 5 3 1 3 7 3 1 4 8 3 1 4 8 3 1 5 9 3 1 9 7 3 1
bsplinecurve r2 2 5 2 3 2.5 1 3 1 3.5 1 4 3 -1 2 3 1 1 11 3 1 3 9 3 1 3 9 3 1 3 9 3 1 5 7 3 1 7 4 3 1
set info [extrema r1 r2]

if {[regexp "ext_1" $info]} {
  set dist [lindex [length ext_1] end]
  if { $dist > 1.0e-8 } {
    puts "Error: Extrema distance is too big"
  }
} else {
  puts "Error: Extrema is not found"
}