puts "================"
puts "OCC21754"
puts "================"
puts ""
#################################################################
# Section of face by plane yields empty result
#################################################################

set BugNumber OCC21754

# load shape and make face with natural bounds, to exclude possibility of
# lame excuse saying that it contains small edges
restore [locate_data_file OCC21754-bug_bsection_empty.brep] a 
mksurface s a
mkface f s

# create plane at Z=-0.410 (the bug is reproduced for Z in range [-0.405;-0.420])
plane pl 0 0 -0.410 0 0 1
mkface p pl 0 10 -5 5

bsection result f p -na

checknbshapes result -vertex 2 -edge 1 -wire 0 -face 0 -shell 0 -solid 0 -compsolid 0 -compound 1 -shape 4
checkprops result -l 0.592137 
checkshape result 
checksection result

checkview -display result -2d -path ${imagedir}/${test_image}.png