BRTDfunc

radiance-general
1

Hello all,

I found the BRTDfunc in the reference manual off Radiance, but I don't
understand fully how this function is working

I have a glass whit a transmittance of 0,8 and an reflectance of 0,08

I was thinking to do link this

void BRTDfunc testing_glass

10

                0.08 0.08 0.08
[I was thinking this is the reflection]

                0.87154 0.87154 0.87154
[I was thinking this is the transmision]

                0 0
0

                .

0

9

                0 0 0

                0 0 0

                0 0 0

but this is nog working it seems like my glas is giving light

2

Hi Sierd,

if all you need to model is a clear glass pane, do not use BRTDfunc but glass. That is an optimized modifier modeling transmission and reflection for thin glass panes surrounded by air (which is a function of the direction a ray is passing through).

BRTDfunc is meant to describe transmission and reflection using the mathematical description language of Radiance (see the cal-files coming in the library). It does not make sense to use it without any mathematical model.

Cheers, Lars.

09.01.2014 tarihinde 18:10 saatinde, "Sierd Tilma" <[email protected]> şunları yazdı:

···

Hello all,

I found the BRTDfunc in the reference manual off Radiance, but I don't understand fully how this function is working

I have a glass whit a transmittance of 0,8 and an reflectance of 0,08

I was thinking to do link this

void BRTDfunc testing_glass
10
                0.08 0.08 0.08 [I was thinking this is the reflection]
                0.87154 0.87154 0.87154 [I was thinking this is the transmision]
                0 0 0
                .
0
9
                0 0 0
                0 0 0
                0 0 0

but this is nog working it seems like my glas is giving light

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