Fix corner pinning
wip mesh deformation for only nearby particles
Fix a couple of bugs
cleanup
Draft fourth dimension
missed line
Add boundaryParticle detection
Clean up NaN issue
Start some cleanup for performance

 - move particle out of Cloth.js
 - start having pre-calculated constraints
 - stop futzing with nearbyParticles as much - this seems to allow opt
 - remove timetep (if condition, math.pow in a hot loop)
 - remove adjacency conditions on satisy collider.
 - start keeping TODO list on index.html
 - upgrade plugins version for fast hand.

Still looks like there’s a lot of GC, more that would be nice.
Break out Collider class, handle hand disappearing while deforming

Also, removing unused mass
Allow multiple fingers (!)
Add orbit controls
Add Restoring force

Prevents chaos when going to corners.
Todo - to try and make this more foam like, add.. higher low-speed
damping?
Remove old vec4 cruft
Allow fingers to push through mesh up to custom depth.