[Radiance-general] Divide by zero in luminaire model / brightdata

[Randolph M. Fritz]

Thanks, Greg!

Looks like my first stab at this was wrong, so I really really 
appreciate the reply.

Randolph

On 2012-06-28 01:40:21 +0000, Gregory J. Ward said:

> Hi Randolph,
> 
> Looking at your files, the problem seems to be the usage of lboxcorr, 
> which specifies in the comment at the beginning of source.cal requires 
> that the impostor geometry be centered at the origin.  The xform 
> command following genbox that someone created does not put the center 
> at the origin.  You can correct for this by either switching the 
> "lboxcorr" to the slightly less-accurate "boxcorr" variable, or adding 
> a transform to your brightdata string arguments (-t 0 0 0.08).  The 
> ies2rad program never outputs "lboxcorr" because of its finicky nature.
> 
> Best,
> -Greg
>>>> From: Randolph Fritz <rfritz at lbl.gov>
>>> Date: June 27, 2012 4:48:00 PM PDT
>> 
> Thanks!
> 
> The .rad file was edited by the modeler; I've attached the edited 
> files. I've also attached the straight output of ies2rad.
> 
> Randolph
> 
> On Wed, Jun 27, 2012 at 4:26 PM, Greg Ward 
> <gregoryjward at gmail.com> wrote:
> Hi Randolph,
> 
> Can you send me the IES input file and the Radiance scene file produced 
> by ies2rad?  Also, find and send your "source.cal" file from the 
> RAYPATH library location.
> 
> -Greg
> 
> > From: "Randolph M. Fritz" <RFritz at lbl.gov>
> > Date: June 27, 2012 3:51:52 PM PDT
> >
> > I'm getting the following error messages from a luminaire model:
> > rpict: warning - compute error for brightdata "luminaire_pendant3_CB087_dist"
> > rpict: Division by zero
> >
> > I'm going to dig into this further - I didn't build the model, and 
> there may be something really obvious wrong with it - but I was 
> wondering if anyone has seen anything like it, and has any tips.
> > --
> > Randolph M. Fritz
> 
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-- 
Randolph M. Fritz
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