puts "========================"
puts " OCC539 "
puts "(case 2)"
puts "========================"
puts ""

  puts "============================================"
 puts "  BOPTUC      case_4_shell.brep and case_4_wire3.brep"
 puts "============================================"
 puts " " 
 puts [restore [locate_data_file case_4_shell.brep] a] 
 puts [restore [locate_data_file case_4_wire3.brep] b] 
 puts [bop a b]
 puts [boptuc result]

set nb_info [nbshapes result]
set nb_v_good 16
set nb_e_good 11

set length 929.278
set 2dviewer 0