Solar azimuth charts

Has anyone worked with solar azimuth/elevation in Grasshopper? I'm just looking to calculate a vector representing the angle of the sun, with sliders for latitude, longitude, month (between equinoxes), and time of day. I'm just figuring this might have been done before.

Thanks,
Chris

Replies to This Discussion

Permalink Reply by Pablo Bontempo on September 30, 2009 at 12:06am

Hello, yes its has donne, look at http://tedngai.net/experiments.html

Pablo

Permalink Reply by mdgreenwald on October 6, 2012 at 11:43am

Chris, Did you ever find any good information on this? I am also interested in Solar design.

So far I've found:

DIVA for Rhino & Grasshopper
Geco for Grasshopper which opens communication to Autodesk Ecotect and can work with DIVA in turn.

Permalink Reply by Vicente Soler on October 6, 2012 at 1:22pm

If you are using Rhino 5, you can access the Rhino 5 sun to get the vector using a really simple script.

See the attached file.

Attachments:

solarvector.gh, 3 KB

Permalink Reply by Carlos Zulueta on December 17, 2013 at 8:23am

Hi Vicente,

I must say it is a very useful script, but I am having problems when changing the location. The longitude actually.

I am trying to do a shadow cast analysis for a city in China (Lat 28 - Lon 112) but somehow the projection seems to be like if it would be over night. Any idea?

Maybe the time zone is set for just one only. Any way of changing that?

Thank you for the help.

Permalink Reply by Vicente Soler on December 17, 2013 at 10:50am

It seems like the time is always in GMT. You can add the line "time = time.AddHours(-8)" to the script to change it to China's timezone.

Permalink Reply by Carlos Zulueta on December 17, 2013 at 12:09pm

I just fix it by adding an addition component (8) to the slider and showing the result on a panel so I am aware of the "local time", since I am not really proficient with scripts.

Thanks

Permalink Reply by Will on December 17, 2013 at 7:13pm

Hey Chris & mdgreenwald, i tried ladybug. Thanks to Mostapha Sadeghipour Roudsari. it rocks! i'm still using it. Yes, it comes with sliders for latitude, longitude, months,days,hours. i used geco, but ladybug is better for keeping the simultaneous analysis-design, i think. Don't know about DIVA. hope it helps.

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