Sorry for making this thread and then going silent for a while, a lot has happened over the past few months, including me moving to LA on a whim... But I'm back!!!! I have tons of new files to share, which I'll push out in the coming weeks.
Today I had a couple of hours to play with Houdini before going to an Escape Room (wish me luck), and I had been discussing the Laplace-Beltrami operator with a couple of buddies on discord for a long time, so i thought, why not implement one myself! After having thought about it for so long it actually didn't involve anything I hadn't already done, or covered in my blogs for that matter (go read them!!!!).
The implementation is based off this paper: http://www.cs.princeton.edu/courses/archive/fall10/cos526/papers/sorkine05.pdf
I did comment the wrangle so hopefully it makes sense. One caveat, is that this version does not include border weighting, so watch out for crazy minimization. For production, just use the attribute blur sop, this is more just me exploring weird math stuff that makes me question my art school degree...
<3 <3 <3
P.S. there's a little ray tracing demo in there as well, since my roommate wanted to understand normals, and I went a bit too far off the deep end in explaining it to him....
EDIT: Petz has brought up a few issues with this, I will make a revision soon