bsplinecurve result 3 3 0 4 3 1 4 4 0 0 0 1 1 2 0 1 2 3 0 1 3 2 0 1 2 0 0 1 
pd
pd
pd
pl
pl
pl
val3d result 0 4 20
set length 6.3759776321287411

