[Radiance-general] rtcontrib problems

[Andrew McNeil]

Hi Ji,
You need a more recent version of dctimestep.  The current version give the
following usage:
Usage: dctimestep DCspec [tregvec]
   or: dctimestep Vspec Tbsdf.xml Dmat.dat [tregvec]

The ability to use a daylight coefficient matrix was added in July 2010,
you must be using a version of dctimestep that is older than that.
Andy

On Thu, Jun 21, 2012 at 10:54 AM, Ji Zhang <hope.zh at gmail.com> wrote:

> 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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>>>>>
>>>>>
>>>>
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