ZigZag based on bezier length #2825
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Updates ZigZag to split bezier into uniform length rather than splitting the bezier parameter.
To calculate the lengths I approximate the bezier segment with 20 linear segments, based on some visual tests, at around 20 segments the results are very accurate (at most 1 pixel off on large/wild beziers).
This value can be lowered for a performance / accuracy tradeoff.
I also tweaked a bit the position of the endpoints as it was slightly off.