Topic: Concave hull

[It's Alive!]

Uses https://github.com/sadaszewski/concaveman-cpp
Its not perfect, must maybe useful down the line

concavity:  is a relative measure of concavity. 1 results in a relatively detailed shape, Infinity results in a convex hull. You can use values lower than 1, but they can produce pretty crazy shapes.
l
engthThreshold: when a segment length is under this threshold, it stops being considered for further detalization. Higher values result in simpler shapes.

I put it in the ArxBrxDelaunay project, I was thinking about using this to remove tin triangles that have edges that fall outside.. someday

[MickD]

Awesome stuff!
I wish I had the time, always wanted to build my own CSG (Constructive Solid Geometry) engine (like the ACIS modeler), a lot of the stuff you're doing is closely/directly related. I've dabbled and made a few starts with a bit of help from a book (will dig it out) and just dig a quick search and there's a lot more info out there now on the topic.
Good stuff, it's pretty heavy going math wise

[It's Alive!]

ArxBrxDelaunay2 should be much faster on larger point sets. I modified the code to use AcGePoint3d, so its no longer necessary to track the Z in a map.
I left both solutions attached.