puts "========"
puts "OCC778"
puts "SAM1656"
puts "(case 1)"
puts "========"
puts ""
######################################
## Incorrect result of cut of the cylinder from the shape.
######################################

restore [locate_data_file OCC778.brep] a 
explode a
checkshape a_1
checkshape a_2

bcut result a_1 a_2

set square 13633.6
set 2dviewer 0