Hello,

With the same simulation results of my last post in the group, I used PovRay 3.7
beta23 to try to do a multi CPU rendering on a Intel Q6600.

PovRay 3.7 is very impressive in speed. Each frame render in around 20 min
(there is 95 frames in total).

The video is MPEG1 encoded.

http://pagesperso-orange.fr/fidos/

Any comments are wellcome.

Regards,
Fidos.

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A hi res rendering of the frame 28 (around 2 hours to render) to show the
particules.

Ragards,
Fidos

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Attachments:
Download 'street_1280x1024.jpg' (299 KB)

Preview of image 'street_1280x1024.jpg'

How big are the input files needed to render a single frame? (that is, 
the output of the simulation, input to pov)

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amazing.


Hi, fidos, Would you like tell something on the simulation techniques you used
in this video? Did u use partilce methods?
Thank you.


"fidos" <fid### [at] wanadoofr> wrote:
> Hello,
>
> With the same simulation results of my last post in the group, I used PovRay 3.7
> beta23 to try to do a multi CPU rendering on a Intel Q6600.
>
> PovRay 3.7 is very impressive in speed. Each frame render in around 20 min
> (there is 95 frames in total).
>
> The video is MPEG1 encoded.
>
> http://pagesperso-orange.fr/fidos/
>
> Any comments are wellcome.
>
> Regards,
> Fidos.

Post a reply to this message

Nicolas Alvarez <nic### [at] gmailisthebestcom> wrote:
> How big are the input files needed to render a single frame? (that is,
> the output of the simulation, input to pov)

The generated datas by the simulation tooks 1.6 Go on my hard disk for the 95
frames.

Regards,
Fidos.

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"Paean" <Pae### [at] gmailcom> wrote:
> amazing.
>
>
> Hi, fidos, Would you like tell something on the simulation techniques you used
> in this video? Did u use partilce methods?
> Thank you.
>

I use the particule level set method.

The algorithm is very simple : The particules are populated and advected with
the fluid as describe by Douglas Enright (paper "A Hybrid Particle Level Set
Method for Improved Interface Capturing"). When a particule escaped from the
fluid, it is animated as a free particule (no influence of the speed of the
fluid). When it touch the fluid, it is removed.

The particules rendered in PovRay are the excaped particules. The surface of the
liquid is rendered with the levelset after polygonisation.

Regards,
Fidos.

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> Nicolas Alvarez <nic### [at] gmailisthebestcom> wrote:
>> How big are the input files needed to render a single frame? (that is,
>> the output of the simulation, input to pov)
> 
> The generated datas by the simulation tooks 1.6 Go on my hard disk for the 95
> frames.

Aw well... then I don't think I can offer you my renderfarm. That's too 
big...

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Fidos,

I have been a fan of your animations since about your 10th post. Your use of
solvers in the animations are incredible.

I am an engineering graduate who did CFD in uni, unfortunately I have lost most
of my notes and don't have any data on implicit solvers, they are notoriously
hard to come by on the internet. I need a one dimensional solver with
compressible properties in order to solve for fluid flow in compressed air
lines in real time. I am working on a ring main type airline with multiple take
off points, and want to justify reducing the size of pipe for the next
installation.

Code in matlab or POV code for a simple implicit solver would be good to get me
started. Who knows, I might be able to animate the results and post them here
in the future.

James

"fidos" <fid### [at] wanadoofr> wrote:
> Hello,
>
> With the same simulation results of my last post in the group, I used PovRay 3.7
> beta23 to try to do a multi CPU rendering on a Intel Q6600.
>
> PovRay 3.7 is very impressive in speed. Each frame render in around 20 min
> (there is 95 frames in total).
>
> The video is MPEG1 encoded.
>
> http://pagesperso-orange.fr/fidos/
>
> Any comments are wellcome.
>
> Regards,
> Fidos.

Post a reply to this message

"fidos" <fid### [at] wanadoofr> wrote:
> Hello,
>
> With the same simulation results of my last post in the group, I used PovRay 3.7
> beta23 to try to do a multi CPU rendering on a Intel Q6600.

Beautiful!  If you moved the camera along a spline, added some mood lighting,
and hid the source behind something -- I know you can't really move it out of
the rectangle -- this would be even more impressive.

To ask the obvious, isn't animation-rendering embarrassingly parallel?  Can't
you just render four frames at a time?  I just finished parsing and rendering
about 80+ GB of data on a Q6600 last night.  Just split up the files into three
directories. and ran them separately.

Wish someone would assign me a project like this.  Then I could justify spending
time on it.  Apparently Roe schemes and discontinuous Galerkin are more
interesting.  So I'm just milking last year's CFD data for all it's worth
instead.  Oh well.  Some day.

Random thoughts.  But very nice.

 - Ricky

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> "fidos" <fid### [at] wanadoofr> wrote:
>> Hello,
>>
>> With the same simulation results of my last post in the group, I used PovRay 3.7
>> beta23 to try to do a multi CPU rendering on a Intel Q6600.
> 
> Beautiful!  If you moved the camera along a spline, added some mood lighting,
> and hid the source behind something -- I know you can't really move it out of
> the rectangle -- this would be even more impressive.
> 
> To ask the obvious, isn't animation-rendering embarrassingly parallel?  Can't
> you just render four frames at a time?  I just finished parsing and rendering
> about 80+ GB of data on a Q6600 last night.  Just split up the files into three
> directories. and ran them separately.

I offered him my renderfarm, but his input data is way too big to 
transfer over Internet.

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