How to Create IcoSphere?
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 From:  amur (STEFAN)
5135.11 In reply to 5135.9 
Hi Michael,

just downloaded your new converter and tested it with "WinOnX" for the Mac.
Works great so far. Since WinOnX is very cheap in price i thought i should
mention it here.

http://www.winonx.com/

Best regards
Stefan
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 From:  stevecim
5135.12 In reply to 5135.9 
Hi Michael

Running obj23dmwireframe from the command line in wineskin.app worked has a test I used a 6MB obj file I had of a spaceship with serious amount of detail both outside in inside, it produced a 23MB 3dm file. 1000s of closed cures, hit select all, -> construct-> planar, run for about 5 minutes then crashed out. Well planar crashed out but MoI was still working it :) it created 27911 surfaces. I was really impressed, the 3dm file grew to 1.8GB :)








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 From:  Michael Gibson
5135.13 In reply to 5135.12 
Hi Steve, I'm glad that it worked as well as it did!

But that's actually a good example of the kind of thing that you should not really expect to convert well.

The main problem there is that your file there has a tremendous number of little facets in it that are essentially trying to replicate curved surface pieces.

This type of conversion is meant for objects that are actually intended to be faceted, stuff like the polyhedron mentioned earlier, or things like diamonds which are supposed to have all flat faces in them.

For areas that are supposed to be smooth surfaces, in a NURBS type object those areas are intended to be created out of large smooth spline patches with one big surface for a broad smooth area, not a whole ton of little flat facets.

When you have such a large number of little facets you're basically replicating a polygon mesh type object structure in NURBS, but there is more overhead for the trim boundaries in a NURBS object structure than there is in a polygon mesh structure - for example the trim boundaries of every NURBS surface are constructed of curve objects, not just a single implicit line between vertices and so they're much more generalized in structure (with additional overhead), and on top of that there's both a UV parameter space curve in the 2D space of the surface as well as a 3D edge curve.

The NURBS structure works well when it's used as intended with larger areas of the model being made up of just a single broad curved spline surface.

You probably know all this already, but I thought I'd better explain this in some more detail since someone looking at your post may think that's the kind of conversion that is supposed to work - I just want to make it clear that it's not - I don't expect for a high poly count object like that to convert well into a NURBS object using a separate little trimmed planar surface for every single polygon.

It does make for a great torture test though! :)

- Michael
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 From:  Michael T. (MICTU_UTCIM)
5135.14 In reply to 5135.13 
Similar test here. I pulled in the closed triangles of an OBJ file exported from Sculptris. I am about 1.4GB. I'll post some pics when I can get back to it.

Michael T.

P.S. Great script Michael G.!
Michael Tuttle a.k.a. mictu http://www.coroflot.com/DesignsByTuttle
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 From:  Yenmonger (OTTERMAN)
5135.15 
I am SO happy to have this new feature. A million thanks!
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 From:  Michael T. (MICTU_UTCIM)
5135.16 
Did some more work. Since I used symmetry in Sculptris, I decided to delete half of the closed curves. Still adding planer surfaces, but is much quicker using half the model. When completed I will mirror it and see what happens. This is not a character I am interested in doing, but I thought for a test, he'd do okay. Current status pics below.






Michael T.
Michael Tuttle a.k.a. mictu http://www.coroflot.com/DesignsByTuttle

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