[Radiance-general] rtcontrib problems

[Andrew McNeil]

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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