Hi,

I'm testing the animation of liquid and the rending in POVRay.

I post my first results : the animation of a liquid pourred in a transparent
glass.

For the simulation of the liquid, I used a program that I wrote in C using
the level set method and the solving of the NS equations. For each frame,
the program generate an isosurface file in the dfd format. When I finished
the simulation, I load the file in POVRay for rendering.

The simulation was around 3 days long (but htere is a lot of room for
optimisation !!!) and the rending around 5 days long.

Regards,

Fidos

Post a reply to this message

Attachments:
Download 'flow.avi.dat' (552 KB)

fidos wrote:
> Hi,
> 
> I'm testing the animation of liquid and the rending in POVRay.
> 
> I post my first results : the animation of a liquid pourred in a transparent
> glass.
> 
> For the simulation of the liquid, I used a program that I wrote in C using
> the level set method and the solving of the NS equations. For each frame,
> the program generate an isosurface file in the dfd format. When I finished
> the simulation, I load the file in POVRay for rendering.
> 
> The simulation was around 3 days long (but htere is a lot of room for
> optimisation !!!) and the rending around 5 days long.
> 
> Regards,
> 
> Fidos
On what system did you get that compute/render times ?
Very impressive, even if the end of the animation makes the liquid 
surface a little odd (and not only because of color ;-) )
Any hope to see such a simulator on-line one of these days ? (If you 
know of one freely available, please tell me).

Regis.

Post a reply to this message

> On what system did you get that compute/render times ?
I did the computation on a P4 3.2 GHz with 1 Go of RAM.

> Very impressive, even if the end of the animation makes the liquid
> surface a little odd (and not only because of color ;-) )
Thank you. I think the end is a little bit odd due to the fact that I didn't
modelize any surface tension.

> Any hope to see such a simulator on-line one of these days ? (If you
> know of one freely available, please tell me).
I plan to release it one day, but I have to correct 2 main problems before
to do so :
- The simulations are to slow to be used in a real project.
- For the moment, the geometry of the objects (for exemple the glass) are
defined by an isosurface hard coded in the simulator. I will write a small
parser (the integration in POVRay would ask for much more work).
I don't know any free liquid simulator suitable for computer graphics. It
exists some commercial ones like RealFlow (which looks very good). You can
find some free simulator of NS equations with source code available (for
instance, you can make a search on sourceforge web page if you are
interested) but still remain the gap to integrate it in a CG package as
POVRay.

Fidos

Post a reply to this message

Hello, I couldn't see it.  MPG-1's will ensure viewability by a greater
audience.

Post a reply to this message