We take a bunch of data relating to electricity, natural gas, and solar, make it understandable, then compile it all together on our website so people can get a good idea of the national/local energy landscape.
> is this like far-away smart people digging through your garage to "find" tools ?
Although some would consider us "far-away smart people" (depending on their geographic location), rest assured that we're definitely not digging through your garage for anything.
edit it seems that 3 months ago, we both commented on this https://news.ycombinator.com/item?id=31555938
To find polygon intersections, one can do a boolean "intersect" operation to see if the resulting operation has any results. If so, the polygons intersect. If not, then they're disjoint.
Angus Johnson has created ClipperLib [1] which implements Vatti's algorithm and is available in a variety of languages, including C++, with ports to Javascript by others [2].
CGAL [3] can do polygon clipping but, from my own experience, ClipperLib is about 400 times faster.
[0] https://en.wikipedia.org/wiki/Vatti_clipping_algorithm
[1] http://www.angusj.com/clipper2/Docs/Overview.htm
