Hi everyone,
Since I'm fairly new to Radiance, I thought I'd see if people think that this is a good way of generating solar paths in outdoor renderings.
* for each hour of a certain day on each month
* run gensky with month, day, hour, lat, long and grep the
output for the alt and az of the sun's position
* write a .cal file that pcomb can use. this cal file will
convert the alt/az of the sun into an x/y position and
draw a red dot, say at that position.
* end for
That seems like it may be slow, but if .cal files can have arrays, i could probably plot all sun positions in one pass.
Does that sound like a reasonable plan?
Thanks,
Chris
if you need just the solar bracelet make it a colored cylinder and tilt it
according to the latitude...
you can both draw it in some CAD system and use it as it is (instancing it,
it could be split into colours according to months) or generate it on the
fly by means of a parametric pattern on the skydome.
If you need to see sun positions (with equation of time) you can just keep
adding sky definition without the glowing dome to the same file, then
visualize the all thing together, being also able to get annual exposure to
other data... (remember -ps 1, look 0 0 1 facing 0 1 0, -vth ... and wait
;-)) )
all these things are really quick to be done...
cheers,
giulio
···
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of
Christopher Kings-Lynne
Sent: 17 January 2005 12:12
To: Radiance-Dev
Subject: [Radiance-dev] Generating solar paths in renderings
Hi everyone,
Since I'm fairly new to Radiance, I thought I'd see if people think that
this is a good way of generating solar paths in outdoor renderings.
* for each hour of a certain day on each month
* run gensky with month, day, hour, lat, long and grep the
output for the alt and az of the sun's position
* write a .cal file that pcomb can use. this cal file will
convert the alt/az of the sun into an x/y position and
draw a red dot, say at that position.
* end for
That seems like it may be slow, but if .cal files can have arrays, i
could probably plot all sun positions in one pass.
Does that sound like a reasonable plan?
Thanks,
Chris
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http://www.radiance-online.org/mailman/listinfo/radiance-dev
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Hi Giulio,
If you need to see sun positions (with equation of time) you can just keep
adding sky definition without the glowing dome to the same file, then
visualize the all thing together, being also able to get annual exposure to
other data... (remember -ps 1, look 0 0 1 facing 0 1 0, -vth ... and wait
;-)) )
Ok, so you are saying that the sky file that gensky produces has a specular sun in it that you can actuall see if you render looking at it? I assumed that didn't happen 
There doesn't seem to be a way of turning off the actual sky in gensky, and leaving the sun... We could just generate the parts of the gensky output we need using a script and just use that?
Many thanks,
Chris
you see the sky only if there is a dome with the skifunc attached to it...
coming later, now I hava a lunch meeting...
oops ;-))
···
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of
Christopher Kings-Lynne
Sent: 17 January 2005 12:37
To: code development
Subject: Re: [Radiance-dev] Generating solar paths in renderings
Hi Giulio,
If you need to see sun positions (with equation of time) you can just keep
adding sky definition without the glowing dome to the same file, then
visualize the all thing together, being also able to get annual exposure
to
other data... (remember -ps 1, look 0 0 1 facing 0 1 0, -vth ... and wait
;-)) )
Ok, so you are saying that the sky file that gensky produces has a
specular sun in it that you can actuall see if you render looking at it?
I assumed that didn't happen
There doesn't seem to be a way of turning off the actual sky in gensky,
and leaving the sun... We could just generate the parts of the gensky
output we need using a script and just use that?
Many thanks,
Chris
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[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-dev
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ok, again here.
gensky generates sun and sky luminance distribution.
this luminance distribution (usually labelled as skyfunc) need to be
attached to a sky dome that the user has to define.
if you do not define any dome the sky will have only one sun and not glowing
dome.
just try
gensky 12 12 12 +s
and
oconv
and
rview
and
-ps 1
everything is black, a part the sun dot.
If you run a script that keep adding these skies to a unique file, you will
end up with the whole annual sun positions (that you need) and sky luminance
descriptions (that you do not need).
if you do not define any dome and render this image you will see the full
sun curve on a black background, being able to overlay it later to the full
rendered views (same views...).
it's a crude way but it works....
let me know,
giulio
···
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Giulio
Antonutto
Sent: 17 January 2005 12:40
To: 'code development'
Subject: RE: [Radiance-dev] Generating solar paths in renderings
you see the sky only if there is a dome with the skifunc attached to it...
coming later, now I hava a lunch meeting...
oops ;-))
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of
Christopher Kings-Lynne
Sent: 17 January 2005 12:37
To: code development
Subject: Re: [Radiance-dev] Generating solar paths in renderings
Hi Giulio,
If you need to see sun positions (with equation of time) you can just keep
adding sky definition without the glowing dome to the same file, then
visualize the all thing together, being also able to get annual exposure
to
other data... (remember -ps 1, look 0 0 1 facing 0 1 0, -vth ... and wait
;-)) )
Ok, so you are saying that the sky file that gensky produces has a
specular sun in it that you can actuall see if you render looking at it?
I assumed that didn't happen
There doesn't seem to be a way of turning off the actual sky in gensky,
and leaving the sun... We could just generate the parts of the gensky
output we need using a script and just use that?
Many thanks,
Chris
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[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-dev
___________________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses.
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Hi!
I've just uploaded here:
http://www.bozzograo.net/radiance/modules.php?op=modload&name=Downloads&file
=index&req=viewsdownload&sid=1
a Python/Makefile thing to generate sunpaths with Radiance.
I should have a better version at home, so I'll probably update
the link soon, but it should give the idea ...
The computed pictures can be mapped to the sky once again with
fisheye.cal ...
Francesco
···
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Ahh - that script is super sweet! More manna from the python master. 
mike
···
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf
Of Francesco Anselmo
Sent: Monday, January 17, 2005 2:41 PM
To: 'code development'
Subject: RE: [Radiance-dev] Generating solar paths in renderings
Hi!
I've just uploaded here:
http://www.bozzograo.net/radiance/modules.php?op=modload&name=
Downloads&file
=index&req=viewsdownload&sid=1
a Python/Makefile thing to generate sunpaths with Radiance.
I should have a better version at home, so I'll probably
update the link soon, but it should give the idea ...
The computed pictures can be mapped to the sky once again
with fisheye.cal ...
Francesco
___________________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses.
_______________________________________________
Radiance-dev mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-dev