[Bf-committers] Feature Request: Per-polygon properties

Gregor Mückl bf-committers@blender.org
Fri, 13 Jun 2003 02:25:31 +0200

Hash: SHA1


Jorrit: You hit a point here that I was struggling with for quite some time. 
But I never thought about tackling it that way :-)

Ton: I didn't yet have a look at how properties are stored in blender. 
However, blend2cs can read the (per-object) properties which blender already 
supports. I think it would be sufficient to provide the same properties for 
each face or vertex. The only drawback is that this will at least cost you a 
pointer for each MVert/MFace, which can be quite a lot of data.

With the XML file format Philipp Guehring is working on (and yes, I'm actually 
ending up pushing him) blender will become even more attractive as a level / 
object editor for 3d engines. And a lot of these engines could use a lot of 
additional information that is best entered into the modeller the stuff was 
created with. So Jorrit is just by chance the first person that stumbled in 
and requested a property / extension system. 

A good design of such a feature will be important. This includes generality 
(there should be no hacks needed to store arbitrary values in properties) and 
accessability from python scripts (so that artists can be supported by 
appropriate tools). Format conversion will be greatly simplified once an XML 
based fileformat is actually understood natively by blender.

I hope I didn't confuse you.


Am Donnerstag, 12. Juni 2003 15:27 schrieb Ton Roosendaal:
> Hi,
> Hrms... for inclusion in the main release we should choose a completely
> different strategy, especially evaluating opportunities with Python.
> It would mean developing a generic system to extend existing Blender
> data. I would welcome a proposal for it, but it won't be simple...
> The advantage of my quick hack is that you can quickly get it released.
> Merging code can also be automated quite some, since you can minimalize
> changes in Blender, and just add a few C files...
> My advice is to not integrate it, and help us getting the specs right
> for a major improvement of the exporting/extension system in current
> Blender, or for new Blender 3.0...
> -Ton-
> On Thursday, Jun 12, 2003, at 14:59 Europe/Amsterdam, Jorrit Tyberghein
> wrote:
> > Ton Roosendaal wrote:
> >> Don't know what you mean here... I would suggest you just take the
> >> bf-blender release and hack this in, and make your own release?
> >> Blender files written with your additions (provided its coded
> >> correct)  will be full compatible. In both ways!
> >
> > Hmm... I would have prefered that this became part of the main
> > Blender. Otherwise we have to
> > keep maintaining a seperate blender release. This is hard for us when
> > there are new releases
> > of Blender.
> >
> > Greetings,
> >
> > --
> > ========================
> > =======
> > Jorrit.Tyberghein@uz.kuleuven.ac.be, University Hospitals KU Leuven
> >
> > - "What is it that a man may call the greatest things in life?"
> > - "Hot water, good dentishtry and shoft lavatory paper."
> >        -- Cohen the Barbarian in conversation with Discworld nomads
> >           (Terry Pratchett, The Light Fantastic)
> > ========================
> > =======
> >
> >
> >
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> ------------------------------------------------------------------------
> --
> Ton Roosendaal  Blender Foundation ton@blender.org
> http://www.blender.org
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