Snap curve to surface

[domybiz]

How can I snap a EP curve on Surface?

I started the curve from one point but when I push on surface the curve didn’t snap on it.

can you help me ? 

[mihirsbcc]

Hold the C key then click on the edge of the surface, it will snap to the surface, or hold the V key and click on any vertices , it will snap to the vert of the surface.

[hamsterHamster]

Select the surface and click the Magnet icon - this will make it Live and everything you create or move will stick to it.

Unclick that icon if you want things to behave standard way.

[domybiz]

I can’t do, I Don’t know why.
I have a surface create by curve like a glass of water.
Then I have to create,from the top of surface,a little spout.
I snap to the curve but when i come back to the surface, the curve does not snap on surface.

I don’t know why

[mihirsbcc]

Could you please upload the scene file? or few snapshots?. Since you are creating a NURBS surface the approach will be NURBS editing or you convert the NURBS to a Poly object. That will give you poly editing tools to create that little spout.

Can't say anything without some reference pics or the scene file. If you are following a reference picture we can guide you to the best approach to model it.

[domybiz]

 In this moment the curve does not snap on surface.

it stop some millimeter before the surface’s top.

excuse me for the disturb and thank’s for your help.

[mihirsbcc]

From the picture, I see that you already have activated the snapping commands from the top. So in this case you do not have to hold C (snap to curve) or V(snap to vertices). I think since both point snap and curve snap is on It is snapping to the CV of the NURBS surface. CVs are always outside of the surface, kind of a cage. 

Try this.

From the top turn off point snapping, keep the snap to curve on. Now left click and hold, if needed while holding your mouse button just shake a little bit around the curve. May be it will work. It is not a complex process, their might be some other issues is causing .

[domybiz]

I post video, I hope we can find a solution.

[hamsterHamster]

This is NURBs display, as you see the snapping follows the perfect circle/curve. You can manage its smoothness by pressing 1, 2, 3 keys, or even increase the CurvePrecision within the objects shape attributes under NURBSSurfaceDisplay.

[domybiz]

Ok but the surface was born from 1 ep curve and revolve.

[hamsterHamster · Accepted solution]

If you want totally 1-deg surface to snap on, then either set Degree:Linear in Revolve node, or Rebuild it with 1 degree in U and V. Otherwise, in your video it looks like you are sliding over the 3 degree Nurbs with display precision of 1.

Without your scene we are just dancing around.

[mihirsbcc]

Hamster is correct. Without your scene , we are just dancing around the issue. Please follow what Hamster is advising you.

[domybiz]

Ok ok My friend, I Don’t know why but i have done it... However Thank You so much for your help and your suggest.

You were really smart.

thank you 😉

[mihirsbcc]

It has got nothing to do with smartness. It is just years of experience.
Glad that you now understand what is the problem and how to solve it.

We are here to help you. The more information we get the easier it becomes
for us to find the solution.

[JJCoddington]

How did you solve it though, I am pressing c and middle mousing near the curve, but I get inconsistent results or no results SUPER frustrating.. want to cry lol