[Radiance-general] Five-phase Method Tutorial: Errors in generating direct sun coefficient matrix

[Alireza Hashemloo]

Hi Greg,

Thank you for your response.

1- I was unsuccessful in my attempt to download the files via the "curl"
call. I received the error : "No such file or directory" followed by "curl:
(23) Failed writing body (0 != 1460)". May I ask if you could send me the
two xml files as
an attachment to my email address?

2- The tensor tree xml file (fullwindow_t45.xml) is generated via the
following command:

$ genBSDF +f +b -geom meter -dim 0.5 3.5 1 2 -.3 0 -t4 5
bsdf/fullwindow.rad > bsdf/fullwindow_t45.xml

I can send you the related input files via a Google Drive link to your
email address if that works for you in order to diagnose the cause for high
reflection values.

3-  Generating the direct sun coefficient images, how can I generate a BSDF
file with Klems' subdivision scheme with  higher resolution (each Klems'
patch subdivided into four smaller patches) as a replacement to using a
tensor-tree file?

Thank you,
Alireza


On Sun, Mar 20, 2016 at 3:12 PM, Greg Ward <gregoryjward at gmail.com> wrote:

> Hi Alireza,
>
> Did you generate the XML files yourself?  The ones I downloaded via the
> current version of the 5-phase bash script don't report this warning, which
> I would say indicates a problem.  You can download the XML files using:
>
> curl -o bsdf/fullwindow_t45.xml
> http://www.radiance-online.org/learning/tutorials/fivephasetutorialfiles/fullwindow_t45.xml
> curl -o bsdf/fullwindow.xml
> http://www.radiance-online.org/learning/tutorials/fivephasetutorialfiles/fullwindow.xml
>
> I can't speculate what is going wrong with your genBSDF command if you
> created these yourself, unless you send me the related input files.
>
> Cheers,
> -Greg
>
> *From: *Alireza Hashemloo <alireh at uw.edu>
>
> *Subject: *Re: [Radiance-general] Five-phase Method Tutorial: Errors in
> generating direct sun coefficient matrix
>
> *Date: *March 20, 2016 1:54:42 PM PDT
>
>
> Andy,
>
> Thank you for your response. I have migrated to Mac in order to complete
> this step of the Five phase method tutorial.
> I have pursued the tutorial with the exact scene descriptions and
> simulation settings.
> I have encountered the following warning/error as follows:
>
> after increasing the limit on the open files in Terminal via the "ulimit
> -n 9999" command, I have called the following command as shown in the
> tutorial:
>
> Five-phase Method Tutoiral | Example 2 - Rendering | Direct Sun
> Coefficient Matrix (page 19) :
>
> command:
>
> $ vwrays -c 4 -pj 1 -fa -vf views/back.vf -x 500 -y 500 | \
> rtrace -h- -opn -faa -ab 0 octs/model_nosuns.oct | \
> rcontrib `vwrays -vf views/back.vf -x 500 -y 500 -d` -n $procs -fac -fo \
> -o viewpics_ds/back_%04d.hdr -e MF:6 -f reinhart.cal -b rbin -bn Nrbins -m
> solar \
> -c 4 -I -ab 1 -ad 100 -dt 0 -dc 1 -lw 1e-2 octs/model_suns.oct
>
> Warnings:
>
> rcontrib: warning - BSDF "bsdf/fullwindow_t45" has 169.4 % front reflection
> rcontrib: warning - BSDF "bsdf/fullwindow_t45" has 218.8% rear reflection
>
>
> Error Description:
>
> Although the given rcontrib warnings do not terminate the command call, it
> does not appear to me that any progress is made leaving the command running
> for over 24 hours.
>
>
> Question:
>
> 1- What would be the reason for the tensor-tree BSDF file
> (fullwindow_t45.xml) generated in the previous steps of the tutorial  to
> have over 100% reflection as shown in the rcontrib warnings?
> 2- How can I remedy this problem in this stage of the tutorial to generate
> the 5185 direct sun coefficient images?
>
> Best Regards,
> Alireza
>
>
> On Wed, Mar 9, 2016 at 7:25 AM, Andy McNeil <mcneil.andrew at gmail.com>
> wrote:
>
>> Alireza,
>>
>> This behavior is consistent with running up against limitations on open
>> files. I don't know how to change the limit on Windows, but found this:
>>
>> http://stackoverflow.com/questions/870173/is-there-a-limit-on-number-of-open-files-in-windows
>>
>> Andy
>>
>>
>> On Mar 9, 2016, at 12:53 AM, Alireza Hashemloo <alireh at uw.edu> wrote:
>>
>> Hi Greg and Rob,
>>
>> Thank you for your responses:
>>
>> - It does not appear that the single back quotes are the source of the
>> problem as I tested the command following your recommendation without
>> passing the `vwrays -vf views/view_A.vf -x 600 -y 600 -d` to "rcontrib" and
>> the rtrace "invalid argument" error still appears.
>>
>> - I have tested the approach to split the command into two parts as you
>> had suggested:
>>
>> part 1:   vwrays -c 4 -pj 1 -fa -vf views/view_A.vf -x 600 -y 600 |
>> rtrace -h -opN -fa -ab 0 model_nosuns.oct > points.txt
>> part 2:   rcontrib -x 600 -y 600 -fac -fo -o viewpics_ds/back_%04d.hdr -e
>> MF:4 -f reinhart.cal -b rbin -bn Nrbins -m solar -c 4 -I -ab 1 -ad 100 -dt
>> 0 -dc 1 -lw 1e-2 model_suns.oct < points.txt
>>
>> the part 1 appears to work properly considering that a "points.txt" file
>> is generated. The part 2, however, does not appear to work: although I do
>> not receive any error messages on my command line, the rcontrib call is
>> completed immediately after it is run and 508 hdr images are generated in
>> the given directory. However, each .hdr file is only 1 KB and the attempt
>> to opening any of them is failed. It does not appear that the files have
>> actually been written successfully.
>>
>> In addition, could you elaborate about your suggestion to  *" Replace
>> the "-x 600 -y 600" with the output of "vwrays -vf views/view_A.vf -x 600
>> -y 600 -d*" " in part 2 of the command?
>> Finally,  I was wondering where the definition for the "solar" modifier
>> as the target light source passed to the 'rcontrib' call (-m solar) is made
>> in the previous steps of the tutorial?
>>
>> Thank you for your help.
>> Best Regards,
>>
>> Alireza
>>
>>
>> On Mon, Mar 7, 2016 at 8:17 AM, Guglielmetti, Robert <
>> Robert.Guglielmetti at nrel.gov> wrote:
>>
>>> On 3/6/16, 9:53 AM, "Greg Ward" <gregoryjward at gmail.com<mailto:
>>> gregoryjward at gmail.com>> wrote:
>>>
>>> I do not think you can have multiple processes under Windows using
>>> rcontrib, no matter which shell you use, so -n 1 (the default) is all you
>>> get.
>>>
>>>
>>> That is true; rcontrib on Windows will silently ignore -n settings > 1.
>>> On OpenStudio, you will get a heads up about this.
>>>
>>>
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