archz2
September 7, 2020, 6:45am
1
Why does rebuild command for a simple flat rectangular surface creates uneven spacing of points when u and v are equal?
In this case, I used both u and v values as 6 for point count and degree as 3 in both u and v
Hello this is exactly what I created yesterday as a subject
@fares.boulamaali The rebuilt surfaces in your examples with the large variation in control point spacing are multi-span surfaces. Your multi-span example surfaces have uniform knots and equal size spans.
Because of the way the NURBS math works in general it is not possible to have uniform control point spacing, uniform knots and equal size spans.
Rebuild uses uniform knot spacing. Non-uniform knots can be useful, particular for curves, but it can also have disadvantages, particularly for fr…
… we all this for the surface of degree 3. there is the command (rebuild uv) don’t forget to activate listening (loose)
archz2
September 7, 2020, 8:08am
3
Thanks! I went through the replies and will post more on your original thread.
I cannot find the loose option in the rebuild surface panel. Is there any other panel I should open to activate ‘loose’?
he mentioned the command RebuildUV there you will find the loose option. is not the same as Rebuild
in fact
eobet
September 7, 2020, 10:12am
6
I’ve asked about this before… so Rebuild produces way different results than RebuildUV… but it still feels like there’s room for a RebuildUniform command as well…
What are my options to rebuild this more uniformly, or re-distribute the hull more uniformly, if I don’t really care about fit and tolerances?
[bild]
refit.3dm (66.6 KB)
(Ideally you’d have a single command with lots of options, but I’ve learned by now that’s not the Rhino way…)
