[Radiance-general] rtcontrib problems

[Ji Zhang]

Hi, Andy and the list,

I tried your suggestion to assign random color to the 145 sky patches when
following Axel's rtcontrib tutorial, but I got the following error message:
Usage: dctimestep Vspec Tbsdf.xml Dmat.dat [tregvec]

the script I used is (Mac OSX bash shell):
cnt 146 | rcalc -e '$1=rand(recno);$2=rand(recno+.3);$3=rand(recno+.7)' \
| dctimestep ./images/patches/p%03d.hdr > ./sky_colorcomb_dctimestep.hdr

I assume I missed something critical here...

Pls kindly advise!

Anyway, the other approach you suggested in the following post still works:
http://www.radiance-online.org/pipermail/radiance-general/2010-December/007529.html

- Cheers, Ji


On Tue, Jun 12, 2012 at 12:07 AM, Andrew McNeil <amcneil at lbl.gov> wrote:

> 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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