[Radiance-general] rtcontrib scripts

[J. David Maino]

Jack,

Actually, my knowledge of Perl is also rather limited, at least as far 
as anything too complex goes, but file manipulations I can do just fine. 
Mainly what I'm trying to do is just take a simple text file that 
rtcontrib spits out and then manipulate that data. I'm not sure if I'm 
just not parsing the data correctly or if the file is just too large and 
my computer is dying trying to run my inefficient algorithms, but Perl 
seems to be failing me for the moment. I'm sure there are faster/easier 
ways to do this than what I'm currently trying, but for now I'm kinda 
just sticking to what I know how to do. Perhaps I will try Python 
though. Can anyone direct me to any good books about programming with 
Python? Also, I will have to look into trying to directly interface with 
rcalc as this sounds much easier and much more efficient than all the 
intermediate steps I'm taking.

Thanks,

Dave

Jack de Valpine wrote:
> Hi Dave,
>
> What kinds of problems are you having with Perl? You should be able to 
> do most anything you want with Perl. The main problem area can be if 
> you are feeding data to into and/or out of radiance programs and end 
> up with buffering problems. For example I only recently learned that 
> there is a '-u' switch for rcalc which causes output to be flushed 
> after each record. This came in real handy for a perl program that 
> uses open2 to both write to and read from an rcalc process.
>
> -Jack
>
> PS, as others on this list know I am a pretty strong advocate of Perl. 
> However, there is also a strong group who use Python for Radiance 
> related scripting. Of course Greg is all about shell.... Nevertheless, 
> as you indicate fairly good knowledge of Perl this might still be the 
> best place to try to get things working....
>
> J. David Maino wrote:
>> Hi all,
>>
>> Recently I've been playing around with rtcontrib for use on my thesis 
>> and have been developing (or trying to rather) some scripts to make 
>> data handling a bit easier. The problem is that my knowledge of shell 
>> scripting is rather limited, and the only other programming language 
>> I know fairly well (perl) is not wanting to cooperate. I'm trying to 
>> automate the process of multiplying the luminance values of the sky 
>> patches to the corresponding RGB values that rtcontrib puts out so 
>> that I can get illuminance data for a whole slew of sky conditions. 
>> Does anyone know of any scripts out there that might do this, or what 
>> programming language might be best suited to dealing with very large 
>> files (I have a lot of illuminance points)? Any help you could offer 
>> would be greatly appreciated!
>>
>> Thanks,
>>
>> Dave
>>
>>
>>
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>