puts "========================"
puts " OCC258 "
puts "(case 1)"
puts "========================"

restore [locate_data_file shading_143.brep] result
checkshape result

tclean result
isos result 0
vinit 
vdisplay result
vsetdispmode result 1
vfit
triangles result

set info [trinfo result]
regexp { +([-0-9.+eE]+) +triangles} $info full tri
regexp { +([-0-9.+eE]+) +nodes} $info full nod

if { $tri < 71 || $nod < 73 }  {
  puts "Error (case 1) : here is shading problem"
}

set 3dviewer 0