[Radiance-general] Invalid spotlight direction

[Vera Liu]

Hi Greg,
That was really helpful. I found the problem was because the surface. Thank
you for the prompt reply!

Best,
Vera


On Sun, Jun 22, 2014 at 10:58 AM, Greg Ward <gregoryjward at gmail.com> wrote:

> Hi Vera,
>
> I love these sorts of questions, because it means I get to look at code I
> haven't touched in years...
>
> In this case, I don't think the problem is with your spotlight
> specification per se.  Rather, I believe the vector orientation disagrees
> with whatever surface you have applied it to.  Radiance makes a check to be
> sure that the spotlight direction is not "behind" the surface you use it
> with, and this generated an error in your case.  Check the geometry you are
> using with your spotlight, and I think you'll find the problem.
>
> Best,
> -Greg
>
> *From: *Vera Liu <lizzielyh at gmail.com>
>
> *Subject: *[Radiance-general] Invalid spotlight direction
>
> *Date: *June 22, 2014 10:40:16 AM PDT
>
>
>  Hi Radiance experts,
> I'm new to radiance and I've came across a problem when using the
> spotlight as light source in the scene generation.
>
> In radiance manual I see:
> direction (-inf:inf),(-inf:inf),(-inf:inf) Min &
> Max infinite
> any aimed orientation
>
> Which means I could use any vector as an orientation. But when I tried to
> use:
> void spotlight lightring3
> 0
> 0
> 7 2000 2000 2000 60 0 1 0
> I get a warning: rpict: warning - invalid spotlight direction for ring
> "spot2.downlight3"
>
> I'm not sure which part I did wrong. Could I specify a spotlight with
> direction 0 1 0?
> Best,
> Vera
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20140622/c51b093c/attachment.html>