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Subdividing faces in Shark? (#2596)
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misterrogers  
#1 Posted : Saturday, October 3, 2009 10:31:34 AM(UTC)
misterrogers

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This is probably a dumb question, but I am quite new to Shark:

I'm trying to figure out how to "sub-divide" any given face into any arbitrary number of faces.. Is this possible?
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misterrogers  
#2 Posted : Sunday, October 4, 2009 7:36:41 PM(UTC)
misterrogers

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In case anyone is confused with my question, I'm referring to the operation available in some other 3d apps like MAYA or 3D Studio known as "Sub-Divide" whereby a "mesh" is created upon any given face. Once created, the mesh becomes multiple new faces which are also editable. Hope this makes sense.
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Tem  
#3 Posted : Sunday, October 4, 2009 11:41:25 PM(UTC)
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I have not seen the functionality you are inquiring about in Shark. I have seen something similar to it in Cinema4D, and other mesh modelers. Different technology for a different purpose.

Actually, not in any CAD surface/solid modeler. I have seen a technology called t-splines, which has become a plugin for Rhino3D. T-Splines provides similar functionality to what you are asking for.

With Nurbs surface modeling one can increase the UVs of a surface, turn on control points for that surface, and then push and pull those points all over the place. Maybe this is close to what you are looking for?

Good Luck!
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ttrw  
#4 Posted : Monday, October 5, 2009 4:28:48 AM(UTC)
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Originally Posted by: Tem Go to Quoted Post
Different technology for a different purpose.


Yes, it's important not to get these confused! :)

You can always export to a mesh modeller (Cheetah3D comes highly recommended if you use a Mac) from Shark using OBJ.

Hope that helps
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zumer  
#5 Posted : Monday, October 5, 2009 5:53:59 AM(UTC)
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No, subdivision surfaces are created using algorithms like Catmull-Clarke. That subdivision process changes the shape of the surface of the facet object, which would obviously be less than ideal for CAD. Subdivision surfaces are used in gaming and graphic applications to smooth localised regions on a surface so that it can represent different levels-of-detail depending on the viewpoint, as dynamic animation works better with less detail (fewer faces) to render on-the-fly. CAD apps produce objects that are relationally invariant regardless of scale or viewpoint. They may have provision to refine faceting for production machining or rendering, but that's done in the context of the finished entity, not as a process in it's creation, as used in 3DS Max or Cinema 4D. That's one reason why those programs are regarded as graphic design apps rather than product design CAD, for example.
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posh.de  
#6 Posted : Monday, October 5, 2009 8:17:13 AM(UTC)
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Originally Posted by: misterrogers Go to Quoted Post
...a "mesh" is created upon any given face. ...

"Edit > Change Object Type... > Mesh..." ?

N.
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ttrw  
#7 Posted : Monday, October 5, 2009 11:34:32 AM(UTC)
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Oh dear- I feel like a fool now! :eek:
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misterrogers  
#8 Posted : Monday, October 5, 2009 9:31:38 PM(UTC)
misterrogers

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thanks everyone, Tem & Posh: that is exactly what I was looking for. I should have opened my eyes more. :)

Zumer: point well taken regarding the diff between cad/3d and programs like Maya or Cinema.. I learned Maya in school a few years ago, but never really liked it because I found it cumbersome and had too many features which I'd never use.. plus it seemed to be more for movies/animation which I wasn't interested in..

In fact the teacher I had taught more about rendering and making things pretty rather than modeling which is all I really wanted to focus on.
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misterrogers  
#9 Posted : Monday, October 5, 2009 9:41:20 PM(UTC)
misterrogers

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Tem: I attempted the method of creating a cylinder using NURBS and increased the U=3, V=3 and turning the control points to visible in the object info box. Unfortunately I wasn't able to select any points other than the ones that comprised the curve(s) that created the geometry to begin with.. ie. none of the intersecting UV points could be selected.. What am I doing incorrectly?

Thanks!
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Steve.M  
#10 Posted : Monday, October 5, 2009 10:18:32 PM(UTC)
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Originally Posted by: misterrogers Go to Quoted Post
I attempted the method of creating a cylinder using NURBS and increased the U=3, V=3 and turning the control points to visible in the object info box. Unfortunately I wasn't able to select any points other than the ones that comprised the curve(s) that created the geometry to begin with.. ie. none of the intersecting UV points could be selected.. What am I doing incorrectly?


Hi,

You would need to "change type" of the cylinder to "surfaces", then either "elevate" or "rebuild" the surface to increase the control points to edit.

- Steve
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misterrogers  
#11 Posted : Tuesday, October 6, 2009 9:23:01 PM(UTC)
misterrogers

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thanks Steve the diagram helps a lot. i'm gonna try that again.
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misterrogers  
#12 Posted : Tuesday, October 6, 2009 9:30:46 PM(UTC)
misterrogers

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And it works just fine. This saves a ton of time and steps. Thanks a bunch! Just one more reason I love this program.
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