Calculate percent shading on surface

#1

I need to figure out how to calculate shading % on a surface. I figure I can sort of do it manually by setting Parallel Projection with a view perpendicular to the surface(s), and then… counting? ugh.
Oh, the surfaces might be a bunch of co-planar but separated surfaces (think: solar modules), so it would be nice if either it were fast & easy per surface (lots of repetition), or could be done on a bunch of surfaces at once. Assuming there is some clever way to do this.
Let me know if that’s not clear.
Thank you.

#2

BTW, if there is no ready way to do this, I might be interested in building a plug-in to do so: is that likely to be possible? Any similar plug-ins I might be able to steal from, design-wise? Do people do that?

#3

Sefaira is another Trimble product aimed at energy analysis of buildings. They convinced our Moderators to open their own category here on this forum:
https://forums.sketchup.com/c/sefaira
There are a couple of subcategories, including one for their Sketchup plugin.

I’ve not looked into it beyond a bit of browsing on their website (linked above) for a few minutes when the forum category first appeared, but it seems to me they MIGHT have a solution for you. Not directly in Sketchup, but they have a plugin that connects (I assume) to their cloud platform and might have the sort of analysis you need.

#4

Also check the Extension Warehouse for other shadow study extensions.

#5

I’ve used this one with some success: https://extensions.sketchup.com/en/content/shadedat
Lets you hover over a given part of the model and tells you how many average hours of daylight a spot gets on a given day.

#6

We have a version of Shadow Analysis plugin which does calculate shading %. It is not published yet, but if you would like to have a look at it please email me at office@deltacodes.pl and you can join our beta testers.