Tim Nikias v2.0 wrote:
>>200s simulation time for the whole animation (450 frames), megapov 1.1
>>has separate time statistics for the simulation.  That's about 1/10 of
>>the render time (Athlon XP 2600+ with other tasks running).
> 
> 
> Ah, I see. My latest run through the scene took 0.2 seconds at the beginning
> and 0.5 seconds at the end per frame, mainly because when the particles slow
> down, they tend to always have contact with a surface, thus more
> calculations need to be done for interaction. Parsing total for 450 frames
> was 221 seconds, so I guess that's not too bad for interpreted POV-SDL
> compared to your compiled script. :-)

You should realize a few points though:

- my system is not optimized for such fast running simulations, reading 
and writing the simulation data takes a good amount of the time.
- i used 200 steps per frame which is probably far more than necessary 
with method 2 (i used the same 200 steps for particle3.mpg which is much 
more critical in that concern).

>>http://www.tu-bs.de/~y0013390/files/particle3.mpg
> 
> Looks good, though some damping might be required for the animation to stop.
> Another thing I noticed: one particle sticks to the middle platform
> underneath the first torus. Its like glued to the right side, but very
> slowly drops, and I guess if you added a few more frames, the particle would
> finally drop to the floor. My question is: what's the reason for this
> stickyness?

It is probably not visible in the strongly compressed mpeg but that 
particle is not sticking but hopping with hardly any sideward movement. 
  It will either fall off the platform after some more seconds or it 
will come to lie on the platform due to the collision damping.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 11 Jan. 2004 _____./\/^>_*_<^\/\.______

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