[Radiance-general] RE: GenCumulativeSky - follow-up questions

[Kam Shing Leung]

Dear Alstan and all, 

Thanks a lot for your quick response. It works after I add ".\" in front of the 
file name. 


May I ask a couple of follow-up questions?

Q1. I tried to generate cumulative skies for direct radiation (binned) for 
different periods of time in a year.  They all give the same results.  Is it not 
possible to specify the time and day period for direct radiation?

Q2. I created angular fisheye views of the sky dome (180-deg spread with the 
centre at the zenith) and found some anomaly that I can't explain:

Direct - 

a. All sun paths are found within approx. 45 degrees from the zenith.  It 
looks like a normal sunpath diagram being "cropped", leaving a circular area in 
the middle.  I changed the view direct (-vd) and it's still the case (i.e. not a 
view setting problem)

b. The sun paths are almost continuous rather than in form 5-degree "bins"

Diffuse -

a. The lowest row of the 145-patch sky dome is particularly bright on the left 
and right sides (i.e. west and east sides, respectively) .  It appears under 
both Singaporean and San Francisco skies.  Would it be related to the limitation 
on <6 degrees sun angle?  


Thanks in advance for bearing with this long list of question.  It would be 
great if there is a "manual" that can be made available - it's a useful tool!

Cheers, 
Kam 


      
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