[esp-r] Re: dailight factors+cfd

[Lars O. Grobe]

Hi!

This is probably not related to file name length. Radiance has its
origins in Unix environments, so it did not inherit those DOS
conventions. However, there is a DEFINE in the sources limiting the
length of strings in general. It should be 128 characters in current
releases. So you should be far from reaching that limit.

Are you sure that the RAYPATH environment variable is set correctly on
your system, and that it includes "." (the current directory)?

Cheers, Lars.

> maybe check the possible length of file names. I could imagine that your
> name is too long (I don't really remember if all the radiance code uses
> the "default" file name length). That could be your problem (your name
> length including extension is 32 characters).
>
> Further ideas:
> The .opt-file should be generated automatically. Check the /rad/
> directory for any empty or differently named .opt.
> 
> Try generating the missing .opt manually (use any example file present
> in the exemplars).
>
> Achim
> 
> *Von:*esp-r-bounces at lists.strath.ac.uk
> [mailto:esp-r-bounces at lists.strath.ac.uk] *Im Auftrag von
> *A.Sdei at brighton.ac.uk
> *Gesendet:* Donnerstag, 16. Februar 2012 13:22
> *An:* Gian Luca Brunetti; esp-r at lists.strath.ac.uk
> *Betreff:* [esp-r] Re: dailight factors+cfd
> Thank you Gian Luca,
>
> I got into it, however it doesn’t seem to work very well. When I
> generate daylight factors all the points have zeros as results and I
> read on esp-r radiance desktop (bottom left window):
> 
> File doesn’t exist
> 
> rad/type2_phd_b6_trees_20_day_fa.opt
>
> and on xterm I get:
>
> rad error generating octree
> 
> type2_phd_b6_trees_20_day_fa.oct removed
> 
> rtrace: system – cannot expand ‘@type2_phd_b6_trees_20_day_fa_opt : no
> such file or directory
>
> do you or anyone else know what this means and what the problems are and
> how to resolve them and get results for daylight factors with ESP-r? Any
> suggestion is greatly appreciated, thank you.
>
> Best,
>
> Arianna
>
> *From:*esp-r-bounces at lists.strath.ac.uk
> [mailto:esp-r-bounces at lists.strath.ac.uk] *On Behalf Of *Gian Luca Brunetti
> *Sent:* 16 February 2012 11:24
> *To:* esp-r at lists.strath.ac.uk
> *Subject:* [esp-r] Re: dailight factors+cfd
>
> Dear Arianna,
> to get daylight factors with Radiance from ESP-r, choose browse/simulate
> -> simulation -> visual impact -> daylight factors.
> 
> After that, I think that if you want to get daylight factors plotted as
> numbers, the menus are self-explaining.
> 
> I don't know how to plot daylight factors as countour lines from ESP-r.
> But I did not look for a way to do it yet.
> 
> Best regards
> 
> Gian Luca
> 
> Gian Luca Brunetti
> Politecnico di Milano
> Dipartimento BEST
> via Bonardi 11
> 20133 Milano
> tel./fax 02 2399 5750
>
> Il 15/02/2012 19.58, A.Sdei at brighton.ac.uk
> <mailto:A.Sdei at brighton.ac.uk> ha scritto:
> 
> Dear All, I can now use radiance desktop via ESP-r and create and view
> images. I need to find daylight factors, does anyone know how? I would
> also need to do some ventilation study and I was thinking of using the
> cfd facility within esp-r.  I would need to do some tests with and
> without trees, is there a parameter such as porosity within esp-r which
> I can use to better define the trees that at the moment are just blocks
> of solid obstruction? Let me know,
>
> kind regards
> 
> Arianna  
>
> *Arianna Sdei*
> *Architect, MPhil (Cantab)*
> *University of Brighton *
> *Research Fellow, IFORE Project*
> *PhD Fellow*