parabola  p 7 0 0 0 0 1 0 1 0 0.2
trim p p -1 1
copy p pr
translate pr 0 -4 0
reverse pr
convert result pr
pl
pl
pu
pu
checklength result -l 3.3514748622014476
checkview -display result -2d -path ${imagedir}/${test_image}.png