[GRASS5] searching for cast shadow algorithm (r.sunmask?)

[Helena]

Markus

you can try to run Jaro's r.sun with the -s flag, (read the manual page first,
whether it does what you need)
and you can see the animations  for summer solstice day and winter solstice day
at the
end of the following document:
http://www2.gis.uiuc.edu:2280/modviz/viz/erosion.html
(it has nothing to do with erosion , it is about topo analysis).

Helena

> Hi again,
>
> for my work I need a cast shadow algorithm. In GRASS 4.x
> the r.sunmask did the job, I already tried to update it
> to GRASS 5 (with help of Huidae). However, the CVS version
> produces non-sense only.
>
> Does anyone have such an algorithm available (calculate shadows
> from given SUN position, local position and DEM)?
>
> Thanks in advance
>
>  Markus
>
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