[Bf-scripts-dev] Mesh Unfolder

[Vilem Novak]

Hi,
I have some ideas for the Mesh unfolder-
1. the algorithms in the script could be used for uv mapping.
2. There could be an option for adding little border faces
(like here - first link i found to this topic:
http://www.ricany.cz/org/farnost/cz/ceska/aktul/modelr.htm ) so
paper models could be done easily from 3d models. 3.there could
be option for splitting the mesh into islands, for the meshes
which have none simple solution.

This are just ideas, not real feature requests :)

Vilem Novak (pildanovak)

----- PŮVODNÍ ZPRÁVA -----
Od: "matthew chadwick" <thesethings at referral.net.au>
Komu: bf-scripts-dev at blender.org
Předmět: [Bf-scripts-dev] Mesh Unfolder
Datum: 16.7.2005 - 14:31:31

> I submit my mesh unfolder script:
> http://celeriac.net/unfolder/about/index.html
> or,
> http://home.referral.net.au/thesethings/polyhedra/index.html
> 
> This script unfolds a simple mesh into a flat net. The
> most obvious use is 
> for folding card models of polyhedra. It's of marginal
> interest to most 
> Blender users I should think, but I submit it anyway
> just because I'm 
> probably going to finish developing it soon and it may
> be handy for some 
> people. One difficulty with this program is that it is
> limited by the fact 
> that there exist some meshes that are impossible to
> unfold into a simple 
> (non-overlapping) net, and many meshes are very
> difficult to find simple 
> nets for.  As a result, many people might find the
> particular mesh they try 
> to unfold will constantly result in overlapping nets
> (because there exists 
> no simple net for that mesh) or that the search takes
> many hours. For 
> example, I tried it on a 20000-face icosphere and it
> took 3 days to find a 
> non-overlapping net! I guess it should be rewritten
> properly in c++, but I 
> haven't got the time. If the mesh is non-convex, things
> get worse still. 
> Nonetheless many simple low-poly meshes are relatively
> easy to unfold.This 
> program essentially searches randomly for nets, but it
> does use a couple of 
> (possibly novel) tricks to cut the search down. Those
> interested in the 
> maths behind unfolding might do a search about it
> because it's a 
> fascinating subject. I'm not a mathematician, just an
> interested amateur.
> 
> Have fun and by all means throw ideas at me, or not.
> 
> Matthew Chadwick (Celeriac).
> 
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> 


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