---------- Forwarded message ----------
From: gerard robin <[EMAIL PROTECTED]>
Date: 2008/10/1
Subject: Re: [Flightgear-devel] Bug or Feature? Or an accidently way to
landinglights; -)?
To: FlightGear developers discussions <
flightgear-devel@lists.sourceforge.net>
On mardi 30 septembre 2008, Vivian Meazza wrote:
> gerard robin wrote
>
> > > > On lundi 29 septembre 2008, Vivian Meazza wrote:
> > > > > gerard robin wrote
> > > > >
> > > > >
> > > > >
> > > > > So, if I understand you correctly, there are no missing features,
> >
> > just
> >
> > > > the
> > > >
> > > > > 2 bugs: z buffer and jitter. Tim has submitted a fix for both
those
> >
> > to
> >
> > > > OSG.
> > > >
> > > > > I've been using it for some time now. Works perfectly, but AFAIKS
> >
> > have
> >
> > > > not
> > > >
> > > > > been taken aboard by OSG.
> > > > >
> > > > > Before:
> > > > >
> > > > >
ftp://ftp.abbeytheatre2.org.uk/fgfs/Screen-shots/bucc-particles.jpg
> > > > >
> > > > > After:
> > > > >
> > > > > ftp://ftp.abbeytheatre2.org.uk/fgfs/Screen-shots/bucc-particles-
> >
> > 2.jpg
> >
> > > > > Vivian
> > > >
> > > > Not exactly what i mean.
> > > > Yes, with xml, had bug with the z buffer
> > > >
> > > > No ,xml don't gives every feature which are available with OSG
> > > > script, The result from FG xml script is very simple ( not far from
> > > > we had
> >
> > with
> >
> > > > PLIB
> > > > effects ).
> > > > OSG script can be very complex with animations into animations
> >
> > regarding
> >
> > > > particles shapes, particles colors ... and so on.
> > >
> > > I'm not sure I understand the problems that you describe - the xml
> > > particles do particle colour, size, transparency, texture, and the
> >
> > gravity,
> >
> > > fluid, and wind programs all work (which they don't in the .osg
script)
> >
> > -
> >
> > > I'm not aware of anything missing? Only 2 shapes are available: QUAD
> >
> > and
> >
> > > LINE. I would guess that they cover pretty much all our needs; do you
> >
> > have
> >
> > > an example of requirement for another shape?
> > >
> > > > For instance, the effect does not need any texture which is
processed
> > > > randomly, according the OSG script.
> > >
> > > Sorry you lost me there - random texture? Language difficulty perhaps?
> >
> > sorry, my language is not good ( out from the hospital, i need some
> > rest :) , same problem in French :( )
> >
> > > > To me (and today) there is only one way to get the best nice effects
> > > > (more realistic):
> > > > => it is to use the OSG script, but if it will be fully translated
> >
> > to
> >
> > > > XML
> > > > (which could give some "heavy" coding).
> > >
> > > If you could describe what is missing in your opinion, we could
perhaps
> >
> > at
> >
> > > least put it on the TODO list. Don't think the coding would be too
> >
> > heavy.
> >
> >
> > I had tried to get the effect that i get with the Catalina wakes OSG,
> > without any success.
> > When testing the xml scripts, i never got the same result ( may be i am
> > wrong), the result was very poor.
> >
> > The content of the OSG scripts (when reading it) shows that there is an
> > animation into an other animation, and a processing of shape colors and
> > transparencies which avoid any texture ( the texture looks to be
created
> > randomly).
> >
> > We can notice that, these OSG examples are a very low level examples
(
> > even
> > they are better than my XML translation)
> > With it we can have an higher complexity ( i am working on it) and i
hope
> > to
> > get better and better effects, without any limitations, but the know how
> > the "writer" and the power of the CPU.
> >
> > So, i concluded that only OSG script is able to answer the requested
> > complexity.
> >
> > > > So up to now, because OSG opened a wide door to many features, i
> > > > guess that we
> > > > must not reduce the size of that door :)
> > > >
> > > > Again, i agree with the common usage of it, like trailing smoke,
or
> > > > some dust on the wheel when touching the ground, however we can do
> >
> > more
> >
> > > > than we did with PLIB.
> > >
> > > I haven't found an effect I couldn't do yet, but perhaps you have? Let
> >
> > us
> >
> > > know and we will look into it.
> >
> > You are right, if we only want the basic ones, which answer today to
> > most of
> > the "generic" requests, in addition to it, we still have Plib which
> > answer too ( the Catalina water bomber use it, i don't need to translate
> > it in OSG)
> >
> > However with OSG we can do more and better, the wake effects , the fire
> > effect, exploding effect are other specific cases which wants more
> > complexity.
>
> Sorry to read that you have been in hospital - hope you are well now,
>
> Regards
>
> Vivian
>
Thanks,
I feel being like a program in CVS, when a lot of persons are working on me
It is never finished :)
Unfortunately the comparison stops here, because there is not any
improvement,
only repair.
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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