Sun Direction/Path for site plan

[wim (Wim Dekeyser)]

Hi Bryce -
There are a few plug-ins that will produce the sun path - you can search Food4Rhino to check those out. The Ladybug Tools probably have the largest user base.

Apart from that, Rhino also has a built-in sun and you could create a Python or C# script to do what you want. Here’s one post on the subject that I found with a quick search:

Rhino 6 sun feature inside Grasshopper or GHPython?

One can at least instantiate a Rhino Sun system and compute sun vectors from this (that’s what I did here). You should also be able to fiddle with the sun system within the Rhino document from e.g. GHPython. I’d think it’d be similar to editing lights, clipping planes etc. Which algorithms are being used and their accuracy is a bit more unclear. For full transparency and the ability to reference methods/papers, I’d also go with Ladybird/Honeybee.

-wim