Speed
<Hi Ed,
I hope you use POE libs for calculating your chaos and collisions in AniPro.
If not you should do this, because POE libs run 3 times faster as the orginal
POCO code.>
Hi Ingo. I haven't used POE yet. Do you mean that there are libraries already
available for some of these calculations?
Right now I am experimenting a lot, and modifying the code after each run.
Would I still want to use POE in that case? If you don't mind, I would
appreciate hearing more details on what's involved.
Here are more details on what I am doing:
I got started by looking through my books on how to calculate the motion, under
gravity, for several objects, and couldn't find anything. So, I made a few
back of the envelope manipulations (starting with 1/2*g*t*t) and tried what I
got. The results were so interesting that I haven't had the time to recheck the
equations, and assumptions, I am using. Do you know where I could find a
description of how to calculate these trajectories?
By the way, I'll send my programs to anyone who would like to try them.
The program I am working on right now, calculates trajectories for two galaxies
whose mass is concentrated at one point. One of the galaxies has about 180
stars. The stars are influenced by the two masses, but generate no gravity
field themselves. I'm trying to reproduce the results in "Violent Tides Between
Galaxies" from Scentific American of 12/73.
They show that close approaches can generate galaxies with spiral arms. The
problem I am having, is that as soon as I start one galaxy, with stars in
random positions, all rotating in the same direction and at speeds that result
in stable circular orbits, the darn thing develops spiral arms ON ITS OWN
(before the other galaxy approaches it).
Let me know what you think.
Ed K