Some NX commands involve a spline as template. In my understanding the characteristics defined by a spline "template" include:
- number of degrees
- number of segments
- definition of knots
In a previous thread, @Yamada talked about % parameter of knots in a spline:
- "We have changed the algorithm a few times over the years."
- "The most common approach is to base the knot values on chord lengths."
I think, no matter what's the exact algorithm, there must be a fixed definition of knots for a spline or other splines using it as a template.
Q1: What's defined by the definition of knots? Is it about the exact % parameter of each knot? Or is it about some kind of relationship between % paramter and % arc length for each knot?
Q2: I often try to create a spline with an existing spline as "template". My current method is based on several steps (listed below). Is there a better way to do the job?
- Copy the existing spline with "Composite Curve".
- "Remove Parameters" to convert the composite curve into a non-timpstamp spline.
- "Make Associative" to convert the non-timestamp spline back to a spline feature.
Thanks!