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* allow running stitch length sequences
* contour fill: fix error message for long stitch length
* satin: fix center underlay stitch length
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* ripple stitch: add stitch grid first option
* introduce an anchor line to fine tune satin guided ripples
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* ripple stitch: add manual pattern placement option
* add flip copies option
* rewrite adjust grid
* more control for satin guided ripples: render at rungs
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* several thread palette extension fixes
* fix svg tartan when original shape is invalid
* tartan stroke spaces
* style
* fix tartan color substituion at pattern start
* ripple: do not render too small paths
* use less space for params warning headline
* fix clone shape path
* zip export template fix (typo)
* add realistic stitch plan output warning (help tab)
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(#3002)
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Add a mode to running stitch that uses randomized phase and stitch length instead of even spacing. This greatly reduces moire effects when stitching closely-spaced curves in running-stitch-based fills.
Add option for randomized running stitch to:
ripple stitch
circular fill
contour fill
guided fill
auto-fill
When is randomization is not selected, ripple stitch will use even running stitch when staggers are set to 0 (default) and the stagger algorithm from guided fill (which does not look nice with a stagger period of 0) when staggers is nonzero.
Also includes fix for satin contour underlays (missing tolerance default) mentioned in #2814. This sets the default tolerance to 0.2mm, which is the largest tolerance guaranteed to be backwards-compatible with existing designs using the default inset of 0.4mm.
Original commits:
* fix satin underlay tolerance default
* Add randomized running stitch, make available in ripple stitch, circular, and contour
* add randomized guided fill
* make ripple stitch use even stitching when not staggering or randomizing.
* add random auto-fill and switch jitter parameter to a percentage (matches satin)
* fix comments
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* fix parallel offset in guided fill for macOS
* ripple grid start position
* circular ripple grid
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* add underlay to single color elements to compensate density
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* guide line position
* use direction from line to shape
* optimize intersection detection
* fix flapack elf
* handle weird guide lines better
* update starting point for self crossing (multiple) fills
* ripple: fixes and non circular join style
* avoid jumps in ripple stitch
* fallback only necessary if shape does not intersect grating
* make valid may return a polygon
* add profiling
* Stitch.__init__ didn't work right and was super slow
* shrink or grow to multipolygon
Co-authored-by: Lex Neva
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Co-authored-by: @lexelby
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