Particles

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Genete
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Particles

Postby Genete » Sun Dec 30, 2007 5:31 pm

I'm working on particles simulation. This is the first attempt of the particles simulation. I'll create a wiki page to show how to manage the parameters. I'm having problems on make the particles free floating when the source moves. I still working on them. Once finished I'll release a particle layer template.

For the moment enjoy watching them!

http://www.youtube.com/watch?v=V9EDol07WLE
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pixelgeek
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Postby pixelgeek » Sun Dec 30, 2007 7:25 pm

Genete - that's beautiful!
How responsive was Synfig with 1000 layers? How long did it take to render?

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Genete
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Postby Genete » Sun Dec 30, 2007 9:20 pm

pxegeek wrote:Genete - that's beautiful!
How responsive was Synfig with 1000 layers? How long did it take to render?


Test it by yourself ;)

The sifz file needs a svn r1240 or higher. There are lot of parameters exported. Here is a brief explanation.

X0, Y0 : Position at t=0
X0spread, Y0spread: X/Y size of particles source.
V0, alpha: Radial components of velocity at t=0
V0spread, alphaspread: random range of velocity components of each random particle
G: gravity acceleration amount
beta: gravity orientation. It is reversed (need fixing)
lifetime: amount of time of a particle's life.
timerate=seconds of equation time per seconds of animation time
b: Damping factor (>0) keep it between 0 and 1 is sane.

Threre are also two boolean:
particles on/off: partially works. activates particles or not.
Damping =0: Not working by the moment. I have to composite the non damping equations. Don't change.

feather and amount are exported from the particle layer itself. Should not be there.

The rest are exported converted values so they cannot be modified.

Once I finish the template I'll write a wiki page and upload a clean file and some examples.
Enjoy! :D
-G
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Developers, packagers, bug testers, translators, artists, web developers, wiki writers... you can contribute! :D

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pixelgeek
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Postby pixelgeek » Sun Dec 30, 2007 11:56 pm

Whoosh - I think I'm going to have to wait for the wiki explanation...
Can you export the canvas so that other pictures can be duplicated?

/me has visions of crowd scenes... :)

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Genete
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Postby Genete » Wed Jan 02, 2008 8:11 pm

New template sample. Now they can floate freely. The basic parameters are the same. Maybe you can see other parameters exported but useless.

http://www.darthfurby.com/genete/synfig ... ample.sifz

and the movie:

http://www.darthfurby.com/genete/synfig ... sample.avi

Enjoy!
-G
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Genete
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Postby Genete » Wed Jan 02, 2008 9:16 pm

Synfig needs your help!
Developers, packagers, bug testers, translators, artists, web developers, wiki writers... you can contribute! :D

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Genete
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Postby Genete » Wed Jan 02, 2008 11:18 pm

One funny test increasing the damping forces...

http://www.youtube.com/watch?v=xpUBrWc36tQ

-G
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Genete
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Postby Genete » Tue Jan 08, 2008 9:50 am

Synfig needs your help!
Developers, packagers, bug testers, translators, artists, web developers, wiki writers... you can contribute! :D

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Rafael
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Re: Particles

Postby Rafael » Thu Mar 03, 2011 3:34 pm

Hi Genete.
Can you explain how to do the smoke simulation?
I downloaded the sifz file but there are some things that I don't understand.
Thanks.

Por cierto: enhorabuena. Es impresionante. :D

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Genete
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Re: Particles

Postby Genete » Thu Mar 03, 2011 7:09 pm

Rafael wrote:Hi Genete.
Can you explain how to do the smoke simulation?
I downloaded the sifz file but there are some things that I don't understand.
Thanks.

Por cierto: enhorabuena. Es impresionante. :D

Hola Rafael, mañana salgo de viaje y no puedo atender tu petición. Dame unos días y podré contestarte con detalle. Vuelve a postear aquí si me hago el vago.
Salute!

-G
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Re: Particles

Postby Rafael » Thu Mar 24, 2011 6:34 am

Hola Genete. ¿Qué tal tu viaje?
Bueno, si ya estás de vuelta y tienes un ratito, a ver si me puedes explicar cómo hacer el humo.
Un saludo.

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Re: Particles

Postby Vinsy » Thu Mar 24, 2011 5:14 pm

i have a question also, i tried the template for particles, it toke a bit of time figure out how to modify things, i like the results but i noticed something, the particles inherit the movement of it emitter? i mean, if i move the source of the particles, the whole smoke,rain,fog or whatever i'm doing is going to move too? i have the impression it does, i tried modifying a bit some values but since the base of the particles is the duplicate layer maybe i won't get any difference for now.
=D!

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Genete
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Re: Particles

Postby Genete » Thu Mar 24, 2011 7:41 pm

Rafael wrote:Hola Genete. ¿Qué tal tu viaje?
Bueno, si ya estás de vuelta y tienes un ratito, a ver si me puedes explicar cómo hacer el humo.
Un saludo.


Hi!
although a bit busy I'll try to not say so many unconsistences...

First of all, please read the particles wiki page: http://synfig.org/wiki/Particles_V2.0
Maybe just read it can solve most of the questions.
To produce a smoke, you have to change the particle internal (the changing circle frmo red to yellow in the template) to a feathred region that deforms along the time to give it more randomness. Then you have to set the following parameters:
Velocity: some value.
Gravity some value
Beta: horizontal to the right (to where the winds go)
Damping forces: start with a small value and increase it to see its effect.
Size X: some wide value
Size Y: Some narrow value
Position X and Y: where you want to place the source of the smoke
Angle Spread: give it a narrow value
Angle: 90 degrees.
and leave the rest as it is.


i have a question also, i tried the template for particles, it toke a bit of time figure out how to modify things, i like the results but i noticed something, the particles inherit the movement of it emitter? i mean, if i move the source of the particles, the whole smoke,rain,fog or whatever i'm doing is going to move too? i have the impression it does, i tried modifying a bit some values but since the base of the particles is the duplicate layer maybe i won't get any difference for now.

If free floating Off is "Off" then particles will float freely even if the source moves.

-G
Synfig needs your help!
Developers, packagers, bug testers, translators, artists, web developers, wiki writers... you can contribute! :D

Vinsy
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Re: Particles

Postby Vinsy » Thu Mar 24, 2011 10:40 pm

If free floating Off is "Off" then particles will float freely even if the source moves.

-G

Really? WOW!!! i'm very grateful to you for create this template, i'm going to check that out now!!! =D
=D!

Vinsy
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Re: Particles

Postby Vinsy » Sun Mar 27, 2011 12:21 pm

oh.. i think i'm doing something wrong, particles don't float freely, just as i thought the particles move along the emitter:

Particle-template-v2.3.gif


how can i move the emitter and leave the particles floating freely?
=D!


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