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

[Leyla Sanati]

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.dsmxThank 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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