On dimanche 28 septembre 2008, Vivian Meazza wrote:
> gerard robin wrote
>
> > On dimanche 28 septembre 2008, Melchior FRANZ wrote:
> > > * Melchior FRANZ -- Sunday 28 September 2008:
> > > > The change wasn't/isn't even necessary (see above).
> > >
> > > Another reason for the patch was that we could use OSG's
> > > model embedded particles in the same scenery. Now that
> > > we have XML configured OSG particles, this reason is
> > > obsolete, too. No reasons left, as far as I can see.
> > >
> > > m.
> >
> > Not fully right, the XML doesn't give ( all) the  features which are into
> > OSG, .
> > So to me the paricles.osg  object  with  animations is longer necessary.
> > For instance,  the Catalina and some others that i am working on.
> >
> > The OSG animation  particles models could be very accurate within XML,
> > but unfortunately  there is missing a lot of features  ( more than a lot
> > :) ) which are there  within OSG native model.
>
> I haven't noticed anything critical missing from the XML particles, and
> they do put the particles in the right frame of reference, and they do get
> the right wind, which the osg solution does not.
>
> What do you see as missing? Perhaps we can get on the case.
>
> There is an update to particles in osg in the pipeline, which I'm currently
> using, and that does improve the look of the .xml particles. I'm not aware
> of the current position of that patch.
>
> Vivian
>
Since i don't know what is new in the pipeline,  i can't precisely answer the 
question.

I only can get some comparison with the actual CVS process ( we had a talk 
about it before )  
The xml which is there, don't give the same result than we have with the .osg 
effects,  and, my models (which are in CVS) are not perfect, i am working on 
a huge improvement regarding the wake.osg  which will increase more  the 
differences.

Yes, a long line of trailing smoke is not possible, because there is not any 
interaction from .osg to .ac  and/or externals ( like winds).
So, i don't say that the xml is wrong, i only say that it don't give the same 
eye candy.


To remember the first talk we had about it here the link :

http://sourceforge.net/mailarchive/forum.php?thread_name=200808121328.41260.ghmalau%40gmail.com&forum_name=flightgear-devel
=================>
 >Are we sure that, all the Particle features which are within OSG, are
> available with the new XML coding <particlesystem> ?
> 
> When translating one of my .osg file to <particlesystem> .xml file, i
> don't
> get the same quality of result.
> 
> It could be just me. I can be wrong.  :(
> 
> Or that new XML coding is may be a first step, and others improvements are
> coming :)
> 

No, all the features of particles are not available with the xml version,
but I don't think that should affect performance. 

Tim recently fixed a bug which only showed up under MSVC9, and other bugs
have been reported, in particular that the particles "jitter". 

There are no further enhancements planned to the xml stuff that I am aware
of, unless Tiago is doing something.

SNIP

Vivian

 <=====================================


Cheers 


-- 
Gérard
http://pagesperso-orange.fr/GRTux/

"J'ai décidé d'être heureux parce que c'est bon pour la santé. 
Voltaire "


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