puts "========"
puts "OCC450"
puts "========"
puts "(case 1)"
puts ""
#################################################################
## After reading file5.igs, the surface of revolution written in this file becomes a plane. 
#################################################################

igesbrep [locate_data_file OCC450a.igs] a *

explode a
mksurface result a_3
set info [dump result]

if { [regexp "SurfaceOfRevolution" $info] != 1 } {
    puts "Error : surface of revolution becomes a plane"
}

set 2dviewer 0