[Radiance-general] "Sensor Surfaces"

[Achim Geissler]

Hi Thomas

thanks for your quick reply. It took me a few days to try to understand the
possibilities you suggested.

The 'falsecolor' sounds quite interesting, but as far as I can tell it does
not allow "automatic" evaluation, i.e. create a file / files that can be
somehow scanned for "hit" or "no hit" per surface. My problem is, that
visually evaluating images after the simulation does not seem practical due
to form / size / repetitions.

And I'm afraid I didn't understand if the stencil method could really help,
but it seems evaluation (or result) is still a "picture" - again not a "hit"
or "no hit" information for a given surface. Actually, I didn't understand
the method, period (and haven't found the time to set up an example and play
around with it).

Something like
http://www.radiance-online.org/radiance-workshop7/Content/Augsburger/Germain
AugsburgerPresentation.pdf, page 8, but with "continuous" and not
"discrete" sensors that can be evaluated for hit-or-miss somehow is what I
have in mind.

I must admit of course (if not clear from the above, anyway) that my
knowledge of the possibilities of Radiance is rather limited.

Thanks
Achim


-----Original Message-----
From: radiance-general-bounces at radiance-online.org
[mailto:radiance-general-bounces at radiance-online.org] On Behalf Of Thomas
Bleicher
Sent: Donnerstag, 19. November 2009 15:08
To: Radiance general discussion
Subject: Re: [Radiance-general] "Sensor Surfaces"

Hi Achim.

Radzilla has a 'falsecolor' material you could use.

With the standard Radiance you could use John Mardaljevic's 'stencil'
method to calculate rtrace origin points on the fly. The resolution of
your 'surface' then only depends on the resolution of your output
image. More details here:

http://www.radiance-online.org/pipermail/radiance-general/2007-March/004214.
html

Regards,
Thomas

On Thu, Nov 19, 2009 at 1:47 PM, Achim Geissler
<achim.geissler at intergga.ch> wrote:
> Dear all
>
>
>
> in order to be able to "scan" a large surface which is located behind a
> partially and non-uniformly transparent surface for "if" direct light
hits,
> I am looking for a way to have "Sensor Surfaces" in a Radiance model. I
> would like to avoid having to define discrete sensor points as this would
> either require an "infinite" number of such points or lead to too large
gaps
> in the information, IMO.
>
>
>
> I have been unable to find any reference to such a possibility. If anybody
> here has any ideas, I would greatly appreciate them.
>
>
>
> Thanks and best regards
>
> Achim
>
>
>
> Yuanda-Europe
>
>
>
>
>
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>
>

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