puts ""
puts "=========================================================================="
puts "OCC31016: Projection of an ellipse or a circle is a B-spline in some cases"
puts "=========================================================================="
puts ""

set projDir { 1 1 1 }

ellipse c 0 0 0  0 0 1  2 1 0  20 10
plane p 0 0 0  0 0 1
projonplane r c p [lindex $projDir 0] [lindex $projDir 1] [lindex $projDir 2] 1

if {![regexp {Ellipse} [dump r]]} {
  puts "ERROR: Projected curve is not an ellipse"
}

if {[CheckProjectionToPlane 100 c 0 [expr 2*[dval pi]] r 0 [expr 2*[dval pi]] p $projDir 1.e-6]} {
  puts ""
  puts "OK: All sample points are projected correctly"
  puts ""
} else {
  puts ""
  puts "ERROR: Projection is incorrect for some points"
  puts ""
}