I've seen these curves (they are very good to animate (change randomly the
orientation of each 1/4 tori), I made a 2D program to do that years ago)
under the name of "Truchet's Curves" from the name of Mr Truchet (don't ask
me who he is)

Philippe

>I've always referred to this type of space-filling curve as a Dragon Curve.
>I'm not sure if that's its true mathematical name or not. Can anyone out
>there identify this class of curves?
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