What is the name of the snake-like image movement algorithm?

Question

The name of the algorithm after some math.

You can move the image line along the line, of course, but you can move the image using a recursive generated path to which the main blocks belong:

U

This is to bypass the 2x2 pixel image. If you have more images, you "multiply" this block (rotated or not) for each segment. The result is a serpentine path.

So, perhaps you remember the name of this algorithm :-) Thanks in advance.

Answer 1

I believe it could be Hilbert Traverse or Hilbert Curve.

., . http://corte.si/posts/code/hilbert/portrait/index.html

Answer 2

Z-order a.k.a. .