[Radiance-general] IES file manipulation

[Mark de la Fuente]

Greg, in this case I'm looking at a 20' linear fluorescent
Indirect/Direct pendant.  The IES file is for a 4' section and I would
array it 5 times.  A sphere with 2' diameter would probably not work if
the suspension length were less than 2' since this is a partially
indirect pendant..  Also, not sure if having the pendant poking through
the illum sphere would work.
 
I thought of a different way of handling this.  Since the ies2rad
program creates the top and bottom rectangles in this case, why not just
use an illum material with a void modifier to create the edges of the
box?
 
Thanks for the response.  It would certainly be faster to use the -i
option.
 
Mark
 
 
> Hi Mark,
>
> Did you try the -i option to ies2rad?
>
> -Greg
>
> From: "Mark de la Fuente" <MdelaFuente at wmtao.com>
> Date: June 24, 2004 12:08:51 AM CEST
>
> Hi everyone,
>  
> I have a situation where I'm using ies2rad to bring files into 
> radiance.  Only I want to attach the photometric info to illum 
> surfaces surrounding my detailed fixture geometry rather than to the

> default geometry...  (pretty typical I think) However in order to do

> so, I have to add rectangles in order to "seal" my fixture.  I am 
> concerned that the addition of these rectangles will affect the 
> magnitude of the photometric information.
>  
> I guess one way to not even deal with boxing the luminaire with
illums 
> is to attach a negative value to the lamp's glow material.  Then rays

> won't "sneak out".  Of course the lamps won't add internal 
> illumination in that case.
>  
> Any thoughts would be appreciated.  I will try and run some tests
when 
> I get a chance.
>  
> Thanks.
>  
> Mark

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