[Radiance-general] rtcontrib problems

[Greg Ward]

Coincidentally, I'm working now to improve the speed & efficiency of rtcontrib, especially for multi-processors.  If any Unix users are interested in trying it out, I've checked a working version into the HEAD.  The program is (temporarily) named rcontrib, to segregate it from its predecessor, but the options and operation should be identical.  Once it's fully tested, I plan to replace the existing rtcontrib with this new version, which has been substantially redesigned.

Cheers,
-Greg

> From: Andrew McNeil <amcneil at lbl.gov>
> Date: June 11, 2012 9:07:45 AM PDT
> 
> Actually, the image generation part may take hours, but combining the patch images into a single image should take only a few minutes. 
> 
> Personally, I've never been able to get that pcomb based command to work, it seems to me that rcalc is waiting endlessly for input.  But you don't need to use pcomb to combine the images anymore, dctimestep provides a much more efficient option:
> 
> cnt 146 | rcalc -e '$1=rand(recno);$2=rand(recno+.3);$3=rand(recno+.7)' | \
> dctimestep ./images/patches/p%03d.hdr > ./images/sky_colorcomb.hdr
> 
> Andy
> 
> 
> On Mon, Jun 11, 2012 at 8:39 AM, Ji Zhang <hope.zh at gmail.com> wrote:
> Thanks, John, I think I should press the button and go to sleep un-frustrated now ... zzzzzzz 
> 
> - Ji
> 
> 
> 
> On Mon, Jun 11, 2012 at 11:36 PM, John Sullivan <sulljoh1 at gmail.com> wrote:
> On Problem 1: You are probably doing it right.  Creating the hdr images in Axel's tutorial on rtcontrib took us a couple of hours.
> 
> -John
> 
> 
> On Mon, Jun 11, 2012 at 11:06 AM, Ji Zhang <hope.zh at gmail.com> wrote:
> Sorry, just figured out that the source for Problem 2: the "-fo" option should be added in addition to the "-ffc" and "-f" options
> 
> the script should be:
> 
> 
> vwrays -ff -x 600 -y 600 -vf ./views/back.vf \
> |rtcontrib -ab 3 -ad 4096 -ar 256 -aa .1 -lw 0.0003 -n 2 \
> -fo -ffc `vwrays -d -x 600 -y 600 -vf ./views/back.vf` -f tregenza.cal -b tbin \
> 
> -o ./patches_copy/p%03d.hdr -m sky_glow -w \
> ./testroom_whitesky.oct
> 
> - Ji
> 
> 
> 
> On Mon, Jun 11, 2012 at 10:54 PM, Ji Zhang <hope.zh at gmail.com> wrote:
> Dear list, 
> 
> I'm following Axel's tutorial on rtcontrib:
> http://www.jaloxa.eu/resources/radiance/documentation/docs/rtcontrib_lesson.pdf
> 
> Problem 1:
> on page 16-17, I use the following script to generate the fisheye image for Tregenza sky patches in random colors:
> 
> pcomb `for i in {000..145}; do \
> echo "-c $(rcalc -e \
> '$1=rand(recno);$2=rand(recno+.3);$3=rand(recno+.7)') \
> ./images/patches/p$i.hdr"; done` \
> > ./images/sky_colorcomb.hdr
> 
> However, the script seems to run forever. Does it really need a long time to create the image, or Have I miss anything here?
> 
> 
> Problem 2:
> on page 17, I changed the script as suggested by changing the "-f" option to "-fo" to overwrite the existing hdr files:
> 
> vwrays -ff -x 600 -y 600 -vf ./views/back.vf \
> |rtcontrib -ab 3 -ad 4096 -ar 256 -aa .1 -lw 0.0003 -n 2 \
> -ffc `vwrays -d -x 600 -y 600 -vf ./views/back.vf` -fo tregenza.cal -b tbin \
> -o ./patches_copy/p%03d.hdr -m sky_glow -w \
> ./testroom_whitesky.oct
> 
> However, I got the following error message:
> rtrace: fatal - command line error at 'tregenza.cal'
> rtrace: fatal - command line error at 'tregenza.cal'
> 
> Can anybody help to advise what the options for rtcontrib I should use here? 
> 
> 
> Thanks!
> - Ji
> 
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