Hi Simen,

I have considered the idea, but I haven't been able to implement it. The
function to be integrated has lots of variables and I still have not found
an easy way to add it. Nevertheless, I'm not happy with Forward Euler so I
definitely will be trying to implement other more stable methods.

A few weeks ago I tried with Backward Euler, which is an implicit method,
(which in theory has excellent stability properties) but had terrible
results.

I'll let you know if I succeed in this stuff.

Thanks for your suggestions!

Fernando.


"Simen Kvaal" <sim### [at] remove_mestudentmatnatuiono> wrote in message
news:3c65be87@news.povray.org...
> This looks better and better! :)
>
> Have you considered using a second, third or fourth order Runge-Kutta
> integration scheme? It is much more stable than Euler-integration (which
is
> intrisically unstable) and only requires a little more programming. Once
> done, it's certainly worth the while...
>
> http://mathworld.wolfram.com/Runge-KuttaMethod.html
>
> Regards,
> Simen Kvaal.

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