[Radiance-general] rtcontrib problems

[Ji Zhang]

Noted with thanks, Andy! I'll try to install the latest version of Radiance
later.

- Cheers, Ji


On Fri, Jun 22, 2012 at 2:26 AM, Andrew McNeil <amcneil at lbl.gov> wrote:

> 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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