Seems more like Hierarchical Triangular Meshing with hexagons. I had to use that for a project a few years back. http://www.skyserver.org/htm/ http://www.skys

Seems more like Hierarchical Triangular Meshing with hexagons. I had to use that for a project a few years back. http://www.skyserver.org/htm/ http://www.skyserver.org/htm/ https://arxiv.org/ftp/cs/papers/0701/0701164.pdf https://arxiv.org/ftp/cs/papers/0701/0701164.pdf