Re: [Libmesh-devel] libHilbert GPL

[Jed B. <je...@je...>]

"Kirk, Benjamin (JSC-EG311)" <ben...@na...> writes:

> This would be my fault
>
> Two options, listed in my preferential order:
>
> (1) I'll try to track down the original author and ask about distributing under a different license
> (2) investigate something like this
> https://github.com/adrpar/libhilbert?files=1
>
> Looks like an apache license, which I'm no expert in but might do the trick

Apache has a patent indemnification clause which makes it incompatible
with LGPLv2.1 and GPLv2.  Companies are usually happy with Apache, but
it is off-limits to (L)GPL software that doesn't want to "upgrade" to
version 3.

http://www.dwheeler.com/essays/floss-license-slide.html


You probably want a fully functional forward and inverse map in
arbitrary dimensions, but I'll just mention Geoff Irving's O(log log n)
BSD-2 implementation here.  These techniques can be generalized to 3D,
and a standard O(log n) implementation could be used for the inverse
map.

http://naml.us/~irving/misc/hilbert.html