[Radiance-general] using transdata for roller shade simulation

[Atzeri Anna Maria (Student NaTec SusEn12)]

Hi Greg,
and thank you for your super quick response!
At the moment I can't implement in my simulation the BSDF type since I'm using Radiance via DIVA, and the actual Daysim version implemented in DIVA doesn't support BSDF type for the annual calculation.
This was the reason for whose I thought to use transdata.
Instead the BRTDfunc seems to work. I tried to run an annual simulation and it seems like nothing wrong happened.

So, I've only to understand how BRTDfunc exactly works. Any suggestion will be very appreciate!

Thank you,

Anna

From: Greg Ward [mailto:gregoryjward at gmail.com]
Sent: 07 May 2015 23:48
To: Radiance general discussion
Subject: Re: [Radiance-general] using transdata for roller shade simulation

Hi Anna,

The transdata (and transfunc) materials do not fully model material behavior as well as the newer BSDF type (or even BRTDfunc).

I have a few models of roller shades, which you might be able to modify to your purpose.  I do not (currently) have any measurements to offer.

Best,
-Greg

-------

# Shade material s99745 by Mechoshade, white facing front (inside)
# Measurements by Mehlika Inanici & Judy Lai 9/20/2004
# Diffuse measurements by Mike Rubin 10/7/2004
void BRTDfunc Mechoshade99745
10
            0 0 0
            .02*tspec .02*tspec .02*tspec
            0 0 0
            shade.cal
0
11
            .628     .628     .628
            .377     .377     .377
            .0225   .0225   .0225
            56        68

-------------

# Shade material #1 by Mechoshade
# Measurements from Steve Hebeisen <steveh at mechoshade.com<mailto:steveh at mechoshade.com>>
void BRTDfunc Mechoshade6020
10
            0 0 0
            tspec tspec tspec
            0 0 0
            mechoshade.cal
0
9
            .37       .37       .37
            .56       .56       .56
            .03       .03       .03

--------------

# Shade material #2 by Hexcelshade
# Measured from sample 11/3/2003
void BRTDfunc HexcelshadeS065
10
            0 0 0
            tspec tspec tspec
            0 0 0
            hexcelshade.cal
0
9
            .26       .28       .30
            .59       .61       .60
            .02       .02       .02

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