Any trick to select CV in NURBS?

[wrend]

no trick and no BFCulling (unless you want to play w you cam clip planes). there is hide unselcted CVs, or isolateView selected, there are hulls, there is arrow pickWalking ....there is not really any convert selectn surface EP/SP --> CV, however, if you wan tto work on surf, then use scult surfaces tool (it'll indirectly manip the relevant CVs for ya, and you can snap to your intersectns).

[Madpear]

Could you show us a picture of you nurbs surface displaying the CV's?

[playmesumch00ns]

The CVs will always be far away from the surface if you have a low number of CVs and a surface/curve with high curvature. This is because B-Splines approximate their control polygon. There ain't really anything you can do about this I'm afraid, pickwalking is usually the best solution.

[mihao]

The following picture is the NURBS with CVs displaying.

I think showing the hull is a good way to help selecting CV, at least, it is easier to know the realationship between all CVs.

By the way, what is pickwalking?

[luminis]

Pickwalking refers to selecting CVs progressively by moving from one to the other by using the arrow keys. This probably won't make sense until you try it yourself. Select one CV (or more) and use the arrow or cursor keys in the keyboard. Pressing <-- and --> (left and right arrow keys) will change the selected CV to the next one or previous one in the U direction and pressing the up and down arrow keys will change it in the V direction. Try it!

That, and displaying the hulls as you said are the only ways to help you visualize what CV controls what part of the surface. But make sure the hulls are only displayed, and not selectable, or you will have a hard time selecting a single CV.

If this is REALLY REALLY bothering you, then you can try to rebuild the surface to a second degree surface (why does rebuilding always come up?!?!?:D). It's not really a good thing to do and I don't recommend doing it at all unless there is a good reason for it, but if you are desperate it will help you a bit, since CVs have sort of more control over their corresponding part on a second degree surface, and they won't need to go all over the place in order to have some influence and alter the shape. This does not come for free though, since CVs of a 2nd degree surface behave differently, they can impair your 'feel' for how CVs control a surface, and you will have difficulties later on when working with normal 3rd degree surfaces. Did that make sense at all?

[mihao]

Wow! pickwalking is a great way to go I think. :lightbulb

Regarding to the method about rebuild, I will try it first then tell you my feeling.

Thanks a lot.

[JoeSchmo]

I love pickwalking too! If only you could do it in polys and
SubD's. ( mabey there's a script out there, or someone will write one)

Also check out the 'paint select tool', under the edit menu in 4
that works great when things get really heavy!
Joe

[olivier georges]

hi, you can try to use the surface editing tool, it`s really cool to sculpt the surface with that tool, with the possibility to modify the tangente of the surface at the editing point.... make a try.


Olivier

[stzaske]

Pickwalking with polygons...wouldn't THAT be nice. I was hoping for it 4.5.

[noktUp]

Why not use the paint selection tool, it works great if you set up a hot key for it. So you could quick swith between transform tools and the paint selection tool. once the paint selection tool is is open, right click over the NURBS obj. and select CV. then paint over the area in which the CV you want to manipulate is.

TIP: Press controll while painting to unselect CV's with out having to use the check box in the tool window.

EDIT>PaintSelection tool>option box.

If your gonna use maya might aswell use artisan, one of mayas best features.\


hope it helps
(noktUp(teenSlut))

[playmesumch00ns]

Originally posted by stzaske
Pickwalking with polygons...wouldn't THAT be nice. I was hoping for it 4.5.

Not really going to happen I'm afraid - could you tell Maya which way was up/down/left/right exclusively in all circumstances? It's quite simple to script, but non-intuitive - you could set it up to pickwalk to the next vertex that's up/down in the Y-axis, or left/right in the x-axis, but then what about Z?

I agree it would be a really useful tool, but I don't think it's possible with polygons. If you can think of a way this could operate, let me know and I'll write a script.

[wrend]

yeah, gotta set up some arbitrary rules for selection of arbitrarily connected pnts. hmm. perhaps if you added modifiers to your pickWalking you might be able to guide it better. thing is, it does work for circumstabces where you have a regular arrangement of pnts (or in the creatn thereof), which can often be the situations where you most want to be using it anyway. check out xteo's xumi implementatn.

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