[Radiance-general] Five-Phase Method: invalid results in daylight matrix

[Alireza Hashemloo]

Thanks Greg!

I will try both approaches.

Regards,
Alireza


On Wed, Feb 24, 2016 at 10:34 AM, Greg Ward <gregoryjward at gmail.com> wrote:

> Hi Alireza,
>
> We saw an issue in another model where the windows were very small
> relative to the wall area, such that genklemsamp was missing them in its
> initial sampling.  The solution is to increase the -c setting (try a factor
> of 10 more) or using the equivalent rfluxmtx command, which uses a more
> robust sampling method.
>
> Worth a try....
> -Greg
>
> *From: *Alireza Hashemloo <alireh at uw.edu>
>
> *Subject: *Re: [Radiance-general] Five-Phase Method: invalid results in
> daylight matrix
>
> *Date: *February 24, 2016 10:25:12 AM PST
>
>
> Hi Rob,
>
> Thank you for your response.
> I have checked the orientation of the daylight polygons (exterior window
> pane) and it matches the given view direction as 0 -1 0. I changed the view
> direction to 0 1 0 just to see if the results would be any different. But I
> receive the same daylight matrix file with all values equal to 0.
>
> Would it be convenient for you if I sent you a Google drive link to my
> project folder with all the files that you need to run the genklemsamp
> command and reproduce the error?
> I had also sent a separate post with regards to variations in the commands
> for generating all-black models in the next steps of the tutorial.
>
> Thank you,
> Alireza
>
> On Tue, Feb 16, 2016 at 7:44 AM, Guglielmetti, Robert <
> Robert.Guglielmetti at nrel.gov> wrote:
>
>> At first (quick) glance, my guess is that your window polygon is oriented
>> backwards. Confirm the window normal faces out, toward the exterior
>> environment and sky, by looking at the vertex order (right hand rule!).
>>
>> On 2/15/16, 12:59 AM, "Alireza Hashemloo" <alireh at uw.edu<mailto:
>> alireh at uw.edu>> wrote:
>>
>> Hello,
>>
>> I have a question about the Example 2 in the five-phase method tutorial (
>> http://www.radiance-online.org/learning/tutorials/fivephasetutorialfiles/Tutorial-FivePhaseMethod_v2.pdf
>> ):
>>
>> OS: Windows 7 (64-bit)
>> Command Line Environment: Git Bash
>>
>> Command:
>>
>> $ genklemsamp -c 1000 -vd 0 -1 0 objects/glazing_outside_pane.rad | \
>> rcontrib -c 1000 -ab 2 -ad 1024 -e MF:1 -f reinhart.cal -b rbin -bn
>> Nrbins -m sky_glow -fa \
>> model_daylight_matrix.oct > daylight_matrices/daylight_matrix.dmx
>>
>> Issue: the recorded values in the generated daylight_matirx.dmx are all
>> equal to 0 (0.000000e+000)
>>
>> I would appreciate if you could help me with possible causes of the
>> invalid results.
>>
>> Thank you,
>> Alireza
>>
>>
>>
>>
>>
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