Hilbert

The recursive Hilbert space-filling curve, both 2D and 3D variants. It incrementally animates the growth and recursion to the maximum depth, then unwinds it back. The Hilbert path is a single contiguous line that can fill a volume without crossing itself. As a data structure, Hilbert paths are useful because ordering along the curve preserves locality: points that are close together along the curve are also close together in space. The converse is often, but not always, true. The coloration reflects this. https://en.wikipedia.org/wiki/Hilbert_curve Written by Jamie Zawinski; 2011.