Fixed Clipper library (our own fork of it) when working with Z coordinate:
The Eigen vector type compares all components, while the ClipperLib
own IntPoint type compared x and y only.
Fixed by overriding the ==/!= operators to compare just x and y components
for Eigen types.
Cherry-picked from prusa3d/PrusaSlicer@0202eec4b7
Co-authored-by: Vojtech Bubnik <bubnikv@gmail.com>
* Initial port of the new ensure vertical thickness algorithm from PrusaSlicer.
Based on prusa3d/PrusaSlicer@1a0d8f5130
* Remove code related to "Detect narrow internal solid infill" as it's handled by the new ensuring code
* Support different internal solid infill pattern
* Ignore removed options
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Co-authored-by: Pavel Mikuš <pavel.mikus.mail@seznam.cz>
Co-authored-by: SoftFever <softfeverever@gmail.com>
