1) Let Clipper use int32_t for representing its coordinates. This
reduces memory and allows to skip conversion between Slic3r Polygon
and Clipper polygon.
2) Disable additional offset before executing the Clipper Offset algorithm.
We don't see any reason for that and it required 64bit Clipper coordinates,
which were disabled with 1).
1) Decreased "gimbal lock" epsilon 10x
2) Got rid of unnecessary back and forth conversions which led to numerical inacurracies
This should fix issues #5172, #5011 and #5398
limited anchors, while before a full perimeter segment was always
taken if possible.
2) Adapted the line infills (grid, stars, triangles, cubic) to 1).
This also solves a long standing issue of these infills producing
anchors for each sweep direction independently, thus possibly
overlapping and overextruding, which was quite detrimental
in narrow areas.
3) Refactored cubic adaptive infill anchroing algorithm
for performance and clarity.
1) All slicer's exceptions are now derived from Slic3r::Exception.
2) New exceptions are defined for slicing errors.
3) Exceptions are propagated to the Plater to show.
It remains to modify the slicing back-end to throw the new SlicingError
exceptions instead of std::runtime_error and to show the other exceptions
by a message dialog instead of a notification.
The offset curve extractor is already quite usable,
though singular cases are still not covered yet
when the offset curve intersects or nearly intersects
a Voronoi vertex.
Removal of the PRINTF_ZU "%zu" Visual Studio printf compatibility macro.
Fixes of a contours self intersection test for collinear segments.
SVG exporter now exports white background, so that the GNOME Eye viewer is usable.
into the 3MF / AMF.
Improved accuracy of ModelVolume's mesh transform back from Object's
coordinate space to its own coordinate space after reloading
from 3MF / AMF.
1) Reworked logic for pasting volumes
2) Fixed paste of volumes into different objects
3) Do not apply offset when pasting into the copied object
4) Keep source transformation matrix and relative positions when copy/pasting volumes into another object
