[Radiance-general] How to verify an IES file ?

[Vaib]

Hi Dr.Jacobs,

For me ltpict.pl also have been useful as I can clearly check the light
distribution for both the orientations, in one shot. Thank you for the
scripts!

I've included image from ltpict.pl too in my initial report/slides.

Best regards,
Vaib


On 23 May 2014 15:15, Axel Jacobs <jacobs.axel at gmail.com> wrote:

> Hi Vaib,
>
> just to add to Rob's comment.  There is also a new ltpict.pl script that
> renders a four-view representation of the light output distribution of
> a light fitting or IES file.
>
> Conceptually, the ltview/ltpict pair is simular to objview/objpict:
> One is interactive, the other renders an HDR image.
>
> I don't think ltpict helps you with your particular problem, but I
> thought this thread provides a good opportunity for promoting it.
>
> Regards
>
> Axel
>
>
> On 23 May 2014 09:52, Vaib <vaibhavjain.co at gmail.com> wrote:
> > Hi Rob,
> >
> > You are right, its better to check the converted IES file, to have
> > confidence in what ies2rad has converted (as Thomas also pointed out). I
> > just did mine using ltview.pl, and it looks okay to me. Distribution
> looks
> > apparently similar to the polar diagram. I have included the image from
> > ltview.pl in the initial report on cloud.
> >
> > Thanks for letting me know about the script.
> >
> > Best regards,
> > Vaibhav
> >
> >
> >
> >
> > On 23 May 2014 02:18, Guglielmetti, Robert <Robert.Guglielmetti at nrel.gov
> >
> > wrote:
> >>
> >> I'm late to this party, but I'd add that Axel Jacobs recently added a
> >> great Perl script to Radiance called "ltview.pl" which is useful for
> sanity
> >> testing your converted ies files in native Radiance. The script is
> available
> >> here:
> >> https://github.com/NREL/Radiance/blob/combined/src/util/ltview.pl/
> >>
> >> ...and it's based on a thing I wrote a while back, which is documented
> >> here:
> >> http://www.rumblestrip.org/2004/05/10/ltview-a-radiance-utility/
> >>
> >> The idea was to look at the actual Radiance light source description
> that
> >> gets created by the ies2rad utility, in actual Radiance, so you are
> truly
> >> seeing what you're gonna get in a Radiance simulation. It's helpful for
> >> confirming orientation, distribution, and intensity (by running "trace"
> >> commands in the rvu window).
>
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