Isocurves continuity

[felipe_valduga]

Hi folks,

I would like to know if there is a way to keep the iso curves (UV mapping) when a curved surface meets a flat surface. Look at the attached file, it has a cylindrical projection for the curved surface but a flat projection on top. I would like to have UV projection to follow the curved part on the flat faces as well.

Thanks in advance!

Felipe

[matthewrjacobs]

Did you try making this as one revolve?  it would probably give you what you are looking for.  

Its not clear to me what you are trying to do here,  if you want to match the top surface to the side surface curvature,   you can do that in the sketch using the curvature constraint.   You could also activate the curvature display  of the sketch  to play around with the curvature combs.

[TrippyLighting]

That cannot be done. The flat ring surface is a trimmed rectangular NURBS surface. The Isocurve analysis represents the UV space of that untrimmed NURBS surface. 

[felipe_valduga]

Thanks for the reply. It is a single revolve, but the flat line on top, no matter how it connects with the curve, it always gives me a planar projection. This behavior affects the texture projection once I bring it to 3ds Max.

[felipe_valduga]

Oh, I thought it should be an easy fix. I have been adjusting the UV mapping in 3ds Max, but it will be great if the model have the corrected UV inside Fusion.

Thanks for the reply!

[TrippyLighting · Accepted solution]

3DS Max does not use NURBS surfaces, but Sub-D meshes. That is a different type of geometry.  The UV's are correct!

For what you want to do with this object, do not use straight lines as profiles for your revolve. Model it as one continuous curve. 

[felipe_valduga]

Thanks, I will try! 3ds Max can import a step file as a "body object" keeping the UV from Fusion intact. That is one of the main reasons I use Max for rendering, because it doesn't tessellate the object during import.

[TrippyLighting]

---

@felipe_valduga wrote:
Thanks, I will try! 3ds Max can import a step file as a "body object" keeping the UV from Fusion intact. That is one of the main reasons I use Max for rendering, because it doesn't tessellate the object during import.

---

That is good to know! I don't work with 3DS Max but that is interesting functionality indeed. Thanks for sharing!

[felipe_valduga]

Drawing a spline (either fit or control) instead of a line did the trick! Thanks @TrippyLighting !

[felipe_valduga]

Interesting that if you draw a line (using line command) that it's not straight horizontal, it has the circular UVs but not connected to the curved surface.