[Radiance-general] 5-phase method - Direct daylight matrix

[Andrew McNeil]

If you want to control shading separately for each orientation than you
need a separate run for each window group. You also need a separate model
for each shading state.  But if all are controlled together or if there is
no active shading than one model is fine.

Andy


On Fri, Nov 15, 2013 at 1:11 PM, Leyla Sanati <leylasanati at gmail.com> wrote:

> Yes. It makes sense.
> Now, may I a question about the direct sun coefficient matrix. I have a
> model with windows facing south, west and north and varying shading devices
> for each orientation.
> Should I create a separate direct sun coefficient matrix for each window
> orientation, or would it be correct if I create an all-black model
> containing all of the shading devices and pass it to rcontrib. Something
> like this:
>
> xform -m black room.rad objects/ground.rad | oconv materials/room.mat -
> objects/glazing.rad objects/shading_south.rad objects/shading_west.rad
>
> objects/glazing_bsdf_south.rad objects/glazing_bsdf_west.rad
> objects/glazing_bsdf_north.rad
>
> skies/suns.rad > octs/model_suns.oct
>
>
>
>
>
> *rcontrib < data/photocells.pts -I -ab 1 -ad 65536 -lw 1.52e-5 -dc 1 -dt 0
> -dj 0 -st 1 -ss 0 -faf -e MF:6 -f reinhart.cal -b rbin -bn Nrbins -m solar
> octs/model_suns.oct > matrices/directsun.dsmx Thank you, Leyla*
>
>
>
>  On Tue, Nov 12, 2013 at 11:34 AM, Andrew McNeil <amcneil at lbl.gov> wrote:
>
>> You don't need to include the venetian blinds in that model, but since it
>> was between the daylight and view matrix polygons it doesn't hurt to
>> include it.
>> Andy
>>
>>
>> On Tue, Nov 12, 2013 at 6:23 AM, Leyla Sanati <leylasanati at gmail.com>wrote:
>>
>>> Andy,
>>> Thank you for clarification. I guess I was confused because I noticed
>>> you had the venetian blinds in your all black model, while it was already
>>> contained in your BSDF. It must have slipped there from previous parts.
>>>
>>>
>>> $ xform -m black objects/testroom_Swall.rad objects/testroom.rad
>>> objects/ground.rad
>>>
>>>  \ *objects/venetianblind.rad  *| oconv materials/testroom.mat -
>>> objects/viewmtxsurf.rad
>>>
>>> \ objects/daymtxsurf.rad skies/sky_white.rad > octs/model_allblack.oct
>>>
>>>
>>> Best,
>>>
>>> Leyla
>>>
>>>
>>> On Mon, Nov 11, 2013 at 7:14 PM, Andrew McNeil <amcneil at lbl.gov> wrote:
>>>
>>>> Hi Leyla,
>>>> Assuming the window frame, mullions and shading devices are contained
>>>> in the BSDF data, no you don't need those either.
>>>> Andy
>>>>
>>>>
>>>> On Mon, Nov 11, 2013 at 12:59 PM, Leyla Sanati <leylasanati at gmail.com>wrote:
>>>>
>>>>> Thank you Andy for your response.
>>>>> Sorry if this sounds dumb.  I just want to make sure I am doing it
>>>>> right. So in the all black model, I include all of the window assembly
>>>>> elements (window frame, mullions, shading devices) Except for the glass.
>>>>>
>>>>> Leyla
>>>>>
>>>>>
>>>>> On Mon, Nov 11, 2013 at 1:42 PM, Andrew McNeil <amcneil at lbl.gov>wrote:
>>>>>
>>>>>> Hi Leyla,
>>>>>> This section computes the direct component of the three-phase method
>>>>>> in order to subtract it out.  The transmission properties of glazing.rad
>>>>>> are contained in the BSDF (bsdf/fullwindow.xml) and is applied in the
>>>>>> second dctimestep command in section 6.8.
>>>>>> Best,
>>>>>> Andy
>>>>>>
>>>>>>
>>>>>> On Sun, Nov 10, 2013 at 8:21 PM, Leyla Sanati <leylasanati at gmail.com>wrote:
>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> My question is regarding the 5-phase method tutorial, example 1,
>>>>>>> section 6.6. I was wondering why glazing.rad is not included in the
>>>>>>> all black model of the direct daylight matrix (after "-").
>>>>>>>
>>>>>>> Best,
>>>>>>> Leyla
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>>>
>>>>>>>
>>>>>>
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