Parametric 3D Weaving Pattern with Over-Under Effect

[martinsiegrist]

There’s a big topic about celtic knotwork which might have some useful definitions:

Celtic Knotwork self-intersections and intersections

Hi, I’m struggling with some details on this repeating pattern for a series of ring designs. I’d really like the 2 line intersections (on the pattern that does not join to a continuous curve) to intersect and shatter each other as the self-intersections do. But I just can’t find the logic to make it work. Also, I’d like the cuts in the boundaries to be parallel to the cutting line, not perpendicular to the line itself. Does anyone have any ideas how I’d do that? All thoughts much appreciated. …