[Radiance-general] rsensor/rcontrib

[Greg Ward]

Hi Aris,

I'm having some trouble understanding what you wrote.  Perhaps it would be better if you sent me your commands, what you expected to get from them, and what you got.  If everything is as you expected, then we're done.  If not, then perhaps there is still a problem with your commands.

The rcontrib command knows nothing about view files, only measurement coordinates.  So, I lost your meaning in your very first sentence.

Cheers,
-Greg

> From: Aris Tsangrassoulis <atsagras at arch.uth.gr>
> Subject: [Radiance-general] rsensor/rcontrib
> Date: May 2, 2014 2:19:38 AM PDT
> 
> Dear Greg,
> 
> thanks a lot for the reply. So, piping data from rsensor to contrib  with
> -I+ , makes  rcontrib to use measurement point position and direction from
> the view file (as expected)  but ignores the rays emitted in accordance to
> the sensor file. That explains the fact that the results remained more or
> less the same when sensor file was replaced. Now comparing the results
> (narrow versus cosine corrected sensor, overcast sky) using rsensor/rcontrib
> 3phase  method, without -I+, there is a difference (58%),  but it is
> much-much less than the difference observed using rsensor only command.
> Consequently, calculation of illuminance values  with 3phase method can be
> done either using the standard method (measurement points to rcontrib with
> -I+ ) or with the combination of rsensor (cosine corrected sensor file)
> /rcontrib without using -I+ but with some "handling" of the rays emitted in
> order to get similar view matrix files.
> 
> 
> Best,
> Aris