 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
looking much better, although i would still say it neads many many more
smaller blobs :)
very impressive how you have managed to get it perfectly cyclic.
does a blobs behavour change acording to its size? - ie smaller blobs
bounder more and higher than larger fatter blobber blobs?
not sure i am 100% keen on the way the blobs stretch out, but maybe thats
just me..
--
Rick
POV-Ray News & Resources - http://povray.co.uk
Kitty5 WebDesign - http://kitty5.com
Hi-Impact web site design & database driven e-commerce
TEL : +44 (01625) 266358 - FAX : +44 (01625) 611913 - ICQ : 15776037
PGP Public Key
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA
Post a reply to this message
|
|
| |
| |
|
|
From: Christoph Hormann
Subject: Re: Flowing particles - take two (144kbu)
Date: 18 Mar 2001 04:31:25
Message: <3AB4806E.2801B46C@gmx.de>
|
|
|
| |
| |
|
|
Nice, but is a bit unnatural. The viscosity seems more like honey, but
the flowing behaviour not, honey would flow in lines and not form single
droplets. Of course that's a matter of inter partcle forces.
It would be nice to see a version, where a lot of additional particles are
added at the between position, something like a still combining all the
particles of all animation steps.
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Rick [Kitty5]" wrote:
> looking much better, although i would still say it neads many
> many more smaller blobs :)
That will be later! :)
> very impressive how you have managed to get it perfectly cyclic.
Thanks! It was quite a headache to implement, but it seems to work now.
> does a blobs behavour change acording to its size?
No.
> - ie smaller blobs bounder more and higher than larger fatter
> blobber blobs?
No, but I don't think it would be correct anyway. Theoretically if there's a
large object and a small object with the same "springiness" and the two
objects hit a surface with equal velocity, they should bounce equally much,
shouldn't they?
But anyway, I don't think a particle system can be compared to real water
that directly. Real water doesn't consist of particles. And when a water
drop hits a surface it may divide into several smaller drops and generally
behave in very complicated ways.
I hope my particle system will be cool-looking, but it's not supposed to be
used by scientists! ;)
> not sure i am 100% keen on the way the blobs stretch out, but
> maybe thats just me..
Do you mean the pseudo motion blur that stretches out the particles in the
direction of movement? I personally like it, but it can be made stronger or
weaker or turned completely off.
Rune
--
\ Include files, tutorials, 3D images, raytracing jokes,
/ The POV Desktop Theme, and The POV-Ray Logo Contest can
\ all be found at http://rsj.mobilixnet.dk (updated January 28)
/ Also visit http://www.povrayusers.org
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Bugs74" wrote:
> Good work!
Thank you! :)
> I'm really looking forward to the code...
> (This is a subtile hint.;-) )
I will release the complete particle system package eventually, but there's
still a lot of work to do before that...
Rune
--
\ Include files, tutorials, 3D images, raytracing jokes,
/ The POV Desktop Theme, and The POV-Ray Logo Contest can
\ all be found at http://rsj.mobilixnet.dk (updated January 28)
/ Also visit http://www.povrayusers.org
Post a reply to this message
|
|
| |
| |
|
|
From: Rick [Kitty5]
Subject: Re: Flowing particles - take two (144kbu)
Date: 18 Mar 2001 09:42:36
Message: <3ab4c95c@news.povray.org>
|
|
|
| |
| |
|
|
> Thanks! It was quite a headache to implement, but it seems to work now.
i can well imagine!
> > does a blobs behavour change acording to its size?
>
> No.
>
> > - ie smaller blobs bounder more and higher than larger fatter
> > blobber blobs?
>
> No, but I don't think it would be correct anyway. Theoretically if there's
a
> large object and a small object with the same "springiness" and the two
> objects hit a surface with equal velocity, they should bounce equally
much,
> shouldn't they?
no, with water there is a sliding scale, large blobs are more likely to
fragment more on impact that very very small droplets witch are more likly
to either bounce almost whole, or simply stick. - this in one of the reasons
that when models are used on films for the obligatoy damn breaking scene it
dosnt look real.
> But anyway, I don't think a particle system can be compared to real water
> that directly. Real water doesn't consist of particles. And when a water
> drop hits a surface it may divide into several smaller drops and generally
> behave in very complicated ways.
i think in may ways it can be compared, and yours with thousands of
incredably small particals should be quite close (then of course we will
want you to add a detergent feature for froth & bubbles)
>
> I hope my particle system will be cool-looking, but it's not supposed to
be
> used by scientists! ;)
well, if its any consolation, one of the great unsolved problems are the
mathematical formulas for motion of fliuds like water, and turbulance in
general (hence the continuing use of wind tunnels and smoke) - skicky fluids
(like syrup) are aparently no problem, but you dont get vortex's in syrup :)
> Do you mean the pseudo motion blur that stretches out the particles in the
> direction of movement? I personally like it, but it can be made stronger
or
> weaker or turned completely off.
yes, could you add real mega pov motion blur?
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Christoph Hormann" wrote:
> Nice, but is a bit unnatural. The viscosity seems more
> like honey, but the flowing behaviour not
I'm aiming for water, not honey, but I know I'm not very close at this
point.
How can I make it look like the viscosity is like water?
(I know the texture should be different, but I've made it solid in these
test renders so it renders faster and so it's easier to see exactly where
the particles are.)
> It would be nice to see a version, where a lot of
> additional particles are added at the between position,
> something like a still combining all the particles of
> all animation steps.
That's just a matter of using more particles. It's a bit slow for my
computer, so I will wait with that for later...
Rune
--
\ Include files, tutorials, 3D images, raytracing jokes,
/ The POV Desktop Theme, and The POV-Ray Logo Contest can
\ all be found at http://rsj.mobilixnet.dk (updated January 28)
/ Also visit http://www.povrayusers.org
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Rick [Kitty5]" wrote:
> with water there is a sliding scale, large blobs are more
> likely to fragment more on impact
Yes, but I can't make the particles fragment!
The closest thing I can do is to use so many particles that they blob
together, so several particles look like one big one.
> very very small droplets are more likly to either bounce
> almost whole, or simply stick.
When a big water drop fragments into several smaller, do those smaller drops
bounce less than a drop that is small in the first place?
> - this in one of the reasons that when models are used on
> films for the obligatoy damn breaking scene it dosnt look real.
What models and which braking scene???
> > But anyway, I don't think a particle system can be compared
> > to real water that directly.
>
> i think in may ways it can be compared, and yours with
> thousands of incredably small particals should be quite close
Hmm, maybe.
> (then of course we will want you to add a detergent feature
> for froth & bubbles)
That might be difficult. Anyway, what do you mean by front?
> could you add real mega pov motion blur?
No, I think that's impossible since the particles are moved not by the clock
value but by an I/O system. But of course you can use regular post-rendering
motion blur...
Rune
--
\ Include files, tutorials, 3D images, raytracing jokes,
/ The POV Desktop Theme, and The POV-Ray Logo Contest can
\ all be found at http://rsj.mobilixnet.dk (updated January 28)
/ Also visit http://www.povrayusers.org
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Smoooth... Nice. :) Good job, Rune! I hope you had a great time in France.
Did you see the Eiffel Tower? (You must have... :)
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Tony[B]" wrote:
> Smoooth... Nice. :) Good job, Rune!
Thank you! :)
> I hope you had a great time in France.
Yeah, it was great!
I did see the Eiffel Tower and a bunch of other things and it was very
interesting.
However, there's nothing like sleeping in one's own bed again! ;)
Rune
--
\ Include files, tutorials, 3D images, raytracing jokes,
/ The POV Desktop Theme, and The POV-Ray Logo Contest can
\ all be found at http://rsj.mobilixnet.dk (updated January 28)
/ Also visit http://www.povrayusers.org
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
> Yeah, it was great!
Cool!
> I did see the Eiffel Tower and a bunch
> of other things and it was very interesting.
Cooler!
> However, there's nothing like sleeping
> in one's own bed again! ;)
Coolest! :)
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
|
|
