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Yep, it's indeed a great program - and it's free too! I've put an "ad"
for it on my own web site (URL below).
It runs on Win-9x and Win-NT. Probably on Win-ME too -- don't know
about Win-2k though.
> Hi Gerrit,
> do you know the great program "Halo" by Les Cowley and Mike Schroeder? I
> make all my simulations with it. Download:
>
> http://www.sundog.clara.co.uk/halo/halosim.htm
>
> Best,
> Mark
>
> gbb schrieb:
>>
>> Hello,
>> I am looking for a programm what can simulate refraction and reflection
>> from a single lightbeam throug a pencil or column prism in all possible
>> directions, like the figures in walter Tape's Atmospheric Halos. Of
>> course the best would be together with the numerical datas about angles
>> etc. I tried to make such a simulation with Studio Max, but I did not
>> succeed in it. On internet I found some programms that gives the
>> raypaths in one direction (cross-section of a prism); so the raypath
is
>> only to change in one direction.
>> Thanking you in advance for help or advice.
>> Gerrit Breman
Paul Schlyter, Swedish Amateur Astronomer's Society (SAAF)
Grev Turegatan 40, S-114 38 Stockholm, SWEDEN
e-mail: pausch at saaf dot se or paul.schlyter at ausys dot se
WWW: http://hotel04.ausys.se/pausch http://welcome.to/pausch
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