[Radiance-general] rtcontrib stdout

[Greg Ward]

Hi Wendelin,

What puzzles me is not that you get different results between your two runs, but that rtcontrib produces the _same_ result under some circumstances.  There should be at least some small variations due to random sampling in every case, unless you specify the -u- option.

Do you mean that your runs are "mostly similar" with the exception of noise, or "identical" as you say?

-Greg

> From: Wendelin.Sprenger at ise.fraunhofer.de
> Date: February 17, 2012 6:42:38 AM PST
> 
> Dear all, 
> 
> at least on my computer (and another one), rtcontrib does give different outputs depending on if it is written in a file with the -o option 
> or given as standard output. Here are the commands: 
> 
> vwrays -ff -vta -vp 0 0 2 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180 -x 128 -y 128 | rtcontrib -n 1 -ab 2 -ad 1024 -lw 0.0003 -h -ffa $(vwrays -d -vta -vp 0 0 2 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180 -x 128 -y 128) -e MF:1 -f reinhart.cal -b rbin -o test_file -fo -m sky_glow -w ground.oct 
> 
> vwrays -ff -vta -vp 0 0 2 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180 -x 128 -y 128 | rtcontrib -n 1 -ab 2 -ad 1024 -lw 0.0003 -h -ffa $(vwrays -d -vta -vp 0 0 2 -vd 0 0 1 -vu 0 1 0 -vh 180 -vv 180 -x 128 -y 128) -e MF:1 -f reinhart.cal -b rbin -fo -m sky_glow -w ground.oct > test_file 
> 
> The test_file is different for the two cases! (It shows different results.) If written in a file, the output is always identical,  also with the %s and %d options. 
> Can somebody help me with that, please? I couldn't find anything that explains this behavior. 
> 
> Thank you very much 
> Wendelin