I am trying to place a co-ordinate system along a bspline curve. I need to use "by incremental distance along curve" as the spacing varies and I need to use "chord length" for my purposes. I am finding that if I use the "chord length" option I get an error saying the "curve must be planar", but if I use "by spacing along a curve" using "chord length" it works? this also occurs with points? these errors do not occur if I use the "arc length" option.
please note that the statement should read using "arc length" it works.
Hi Richard,
Can you please elaborate what are you trying to achieve with some screenshots?
You can also have a look at this wiki Points On Curve.
thank you for your reply but is this varying spacing of points along the curve done by arc length or chord length? I need to work with the chord length. to establish straight lines between the points?
I want to be able to create points along the curve at exact straight line distances (chord points) between the points.
Hi Richard.
If you have created the bspline from a polyine with an order of 2, which I believe you have, then it looks like placing the coordinate system using the ArcLength will still place the coordinate system at Chord Length like distances. It looks like the order of 2, eliminates any approximation of the curve, therefore the coordinate system follows the Chord. Have a look at the attached, and try measuring the distances between the points snapping to the vertices in between.
Stuart
Incremental_Distance.dgn