[Radiance-general] Re: Glare and evaluation of lightshelves

[Greg Ward]

Hi Carlos,

Unfortunately, I don't have a lot of time to play around with this 
right now.  It looks on first glance that your ceiling is highly 
specular -- is it made of metal?  I can't understand these sorts of 
reflections off any standard painted surface.

As for the bug in glarendx, I have fixed it for tomorrow's HEAD, but I 
don't think this is your problem as you only use a 180 degree field of 
view in your fisheye image, leaving findglare unable to fully 
characterize the window.  I would think it better if you increased your 
field of view.  Also, I'm not sure that the various glare index 
calculations are stable for sources that are at right angles to the 
view direction.  I recommend that you use the -ga option to findglare 
to generate vertical illuminances at several angles, then use these in 
glarendx to get a function of glare with respect to view direction.  
This way, you'll be able to see how sensitive the calculation is to 
viewing direction.  It will only work with a wider view, however, so 
you will need to use the view type -vta rather than -vth.

-Greg

> From: Carlos Ochoa <carlosochoam@yahoo.com>
> Date: Wed Nov 19, 2003  4:47:15  AM US/Pacific
>
> Hi Greg,
>
> This is Carlos again, I'm attaching with these email the
> picture files and the octrees of the cases I was describing
> for the radiance online group, since I think it is a bit
> difficult to describe them exactly with words.
>
> I read also the other comment about the bug in DGI arising
> from the source being behind the field of view... could it
> be?
>
> Many thanks,
>
> Carlos Ochoa