Re: [Brad] Help:Setting up a radiance system--brad

[steve michel]

Thanks Fransceco,

Ill look into making a template blender file scaled to 'fit' the ies lights and ill review the man pages for ies2rad. What alerted me to scaling is the render I got when I inserted an incadescent light in a blender scene. the resulting render had a yellowish tint far in excess to what I would expect from such a light source.

thnx & regards,

Steve

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From:  Francesco Anselmo <address@hidden>
Reply-To:  address@hidden
To:  address@hidden
Subject:  Re: [Brad] Help:Setting up a radiance system--brad
Date:  Tue, 10 Apr 2007 15:07:40 +0100
>Hi Steve,
>
> > I've been using brad and generally find it handles the main radiance tasks
> > quite well.
>
>I'm happy you can make some use of it :)
>
> > But I found three issues: (these don't prevent me from using brad but maybe
> > need to be addressed by the programmers)
>
>Thanks for posting your comments and issues to this ml.
>
> > 1/ starting brad generates the following errors at console:
> >
> > <<Compiled with Python version 2.4.
> > Checking for installed Python... got it!
> > brad.py:0: SyntaxWarning: name 'config_path' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'brad_path' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'configparserok' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'lang' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'editor_path' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'config_path' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'export_path' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'debug' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'brad_path' is assigned to before global
> > declaration
> > brad.py:0: SyntaxWarning: name 'radiance_binaries_path' is assigned to
> > before global declaration
> > brad.py:0: SyntaxWarning: name 'radiance_library_path' is assigned to before
> > global declaration
> > brad.py:0: SyntaxWarning: name 'configparserok' is assigned to before global
> > declaration
> > brad.py:684: SyntaxWarning: name 'X' is used prior to global declaration
> >   def mainguievent(evt, val):
> > brad.py:684: SyntaxWarning: name 'Y' is used prior to global declaration
> >   def mainguievent(evt, val):
> > Retrieving previously saved configuration.
> > brad path:  /home/family/.blender/scripts/brad
> > gui path:  /home/family/.blender/scripts/brad/brad/gui
> > bradlib path:  /home/family/.blender/scripts/brad/brad/brad>>
>
>These warnings should not do any harm, they are just a bit annoying.
>
> > 2/ Using the sky weather settings and hitting the preview button results in
> > a python script error:
> >
> > <<failed to initialise psyco
>
>the psyco initialisation warning does not relate to this
>
> > Traceback (most recent call last):
> >   File "/home/family/.blender/scripts/brad.py", line 1150, in mainguibevent
> >     skyweatherwindow.testSky()
> >   File "/home/family/.blender/scripts/brad/brad/gui/SkyWeatherwin.py", line
> > 442, in testSky
> >     self.exportSky(skyfilename, 1)
> >   File "/home/family/.blender/scripts/brad/brad/gui/SkyWeatherwin.py", line
> > 359, in exportSky
> >     skyfile = open(skyfilename, "w+")
> > IOError: [Errno 2] No such file or directory:
> > '/home/family/.blender/scripts/brad/brad/tmp/tmp.sky'>>
> > --------------------------------------------------------------------------------------------------------------------------------------------
>
>It looks like you don't have a
>/home/family/.blender/scripts/brad/brad/tmp/
>directory.
>Make sure to create it.
>
> > 3/ this issue is probably trivial for experienced users: SCALING of lights
> >
> > If I insert a radiance ies light into a blender scene, how do I check that
> > the relative scales of blender objects AND radiance lights coincide????? A
> > room 10x 10 units in blender with an inserted light fixture from radiance
> > libraries might might too small or too big..does anyone know of this and/or
> > can explain???
>
>Just make sure that you use units consistently in your file.
>For instance I always use metres.
>So if I get a model in millimetres, I scale it down with a .001 factor.
>Then ies2rad by default outputs geometry and photometries using meters
>(-dm), so I have no problems.
>Perhaps you're trying to use the desktop radiance luminaires?
>They are in foot, if I remember well, so you must scale them
>appropriately, and redo the ies2rad run to get the photometries right.
>
>HTH,
>
>Francesco
>
>
>
>
>
>
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>address@hidden
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