[Radiance-general] Desktop Radiance and IES

[Greg Ward]

Sorry guys -- this conversation has me a little confused.  Normally  
when we talk about "IES files," we're referring to those produced by  
lighting manufacturers.  You must be referring to another program --  
this perhaps?

	http://www.iesve.com/content/

In which case, you should be more specific so we'll know what you're  
talking about...  If Nick was actually asking about IES luminaire  
files, then ies2rad is what he's looking for.  TMA (too many acronyms).

Cheers,
-Greg

> From: John Mardaljevic <jm at dmu.ac.uk>
> Date: May 21, 2008 6:20:18 AM PDT
>
> Nick,
>
> The easiest way is to grab the Radiance format files that IES  
> creates when it converts the 3D model from its native format for  
> use by Radiance.  Can't recall where they reside in the file  
> system, you'll need to do a little searching.  The Radiance format  
> files should be mostly standard.  There is however one exception  
> that we found: the 'xform2' command.  This is not part of the  
> standard release and the octree conversion will fail if it  
> encounters this command in a rad file.  Similar to xform, IES uses  
> xform2 to create rectangles of arbitrary dimension for, it seems,  
> use as workplanes.  It does this by applying arbitrary scaling in  
> the x and y dimensions (independently) on a unit square polygon (z  
> = 0.8) and translating the output to the desired location in the  
> scene.  I would have thought that simply creating a polygon in the  
> right place would be a neater method, whatever.  Since the xform2  
> commands are embedded in the scene rad files, you'll have to strip  
> them out.
>
> -John

---------------
> From: "Nick Calcagni" <nac342 at drexel.edu>
> Date: May 21, 2008 12:05:45 AM PDT
>
> Hello,
>
> Does the IES standard file format have any kind of paradigm in  
> Desktop Radiance or Radiance? Like say, the ability to take that  
> IES file and use it directly without having to re-type any  
> parameters from the IES file into Radiance? A converter? Or a copy  
> and paste job?
>
> Thanks,
> Nick Calcagni