Tatting has 2 basic knots that create a stitch, 2 basic shapes built of those knots and that's all you need to develop really complex designs. You can also change one of those shapes with its original counterpart, the bare thread.
But graphing it has to consider almost every length, direction, shape, stitch combination that a designer could imagine for the work.
There are thousands of vintage motif designs we still use, modernizing them. Add the new standards, really long rings and chains of 70 stitches. Variations of the DS.
A ring longer than 44 DS hardly keeps its shape and it's harder to close it. Maybe it'd be better to use SCMR instead of a natural ring. At least that's what I do when tat Ankars huge rings.
A natural chain of 36 DS, more less, tends to close itself as it were a ring. There is a japanese tatter that uses very long chains in her designs.
Celtic tatting requires Knot Theory to program it.
That's important to formulate the drawing algorithms which had had to control the length depending on shapes, core thread and direction of the tatting lace in a doilly, an edging or a motif.
Perhaps that's why there are few free web apps (I've known only 2), for creating Bezier curves that resemble rings, chains, picots and nothing else, don't take care of the size of the rings, chains, threads, flow of the work, the shapes links, for example. None paid app. Not even donation supported app.
Why no other app developer has worked on it?
Just asking myself.
The simplest things in life are the harderest to explain.
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