[Radiance-general] Query regarding rcontrib

[Andrew McNeil]

Hi Don,
Two things:
1 - You should use the same material for the sky and ground so that the
ground reflected component is included in patch 0. I typically use a single
360 degree source to encompass by sky and ground.
2 - Your zip file didn't include test_Model1.opt, used by the rcontrib
command, but make sure that -ab is 2 or greater to
get inter-reflected contribution from the sky on a ceiling illuminance
sensor (if -ab isn't sepcified in the opt file rcontrib defaults to -ab 1).

Let me know if these two changes don't give better results and I'll
investigate further.

Andy



On Tue, Jul 23, 2013 at 4:02 AM, Don Stearn <don.stearn at iesve.com> wrote:

>  I have an application which currently uses rtrace to generate
> illuminance data for sensors, and I’m trying to change this to use
> rcontrib.****
>
> ** **
>
> When I have sensors on the WP pointing up (see simple model
> http://upload.iesve.com/downloads/rcontrib/model.png) I get results that
> I’m happy with (results for rtrace -
> http://upload.iesve.com/downloads/rcontrib/sensor1_rtraceCIE.png and
> results for rcontrib -
> http://upload.iesve.com/downloads/rcontrib/sensor1_rcontribCIE.png).****
>
> ** **
>
> When I move the sensors to the ceiling and pointing down (see revised
> model http://upload.iesve.com/downloads/rcontrib/model2.png) I get no
> results for rcontib (results for rtrace -
> http://upload.iesve.com/downloads/rcontrib/sensor1D_rtraceCIE.png and
> results for rcontrib -
> http://upload.iesve.com/downloads/rcontrib/sensor1D_rcontribCIE.png).****
>
> ** **
>
> I’ve attached the data files (
> http://upload.iesve.com/downloads/rcontrib/files.zip) – the file
> rcontrib.bat is what I’m running.****
>
> ** **
>
> ** **
>
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