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

[Markus Neteler]

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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