into a graph with links to the layer above / below.
In addition:
Members of LayerRegion were made private, public interface const only.
this->m_xxx replaced with just m_xxx
SurfacesPtr was made a vector of const pointers.
The real issue was with T-Junctions created by Arachne - seam placer then sometimes
choose the wrong perimeter to split. The fix cases the seam placer to look for two
consecutive points that point to the same perimeter, which enusres that the correct
loop is split
SeamPlacer.cpp/.hpp files from master_250 were used, there should be no changes
in master that will be overwritten, the feature was backported from master and
only developed in master_250 from then on
CONFLICT (content): Merge conflict in resources/profiles/PrusaResearch.idx
CONFLICT (content): Merge conflict in resources/profiles/PrusaResearch.ini
CONFLICT (content): Merge conflict in src/libslic3r/CMakeLists.txt
CONFLICT (content): Merge conflict in src/libslic3r/Fill/Fill.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode.hpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/GCodeProcessor.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/GCodeProcessor.hpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/SeamPlacer.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/SeamPlacer.hpp
CONFLICT (add/add): Merge conflict in src/libslic3r/Geometry/Curves.hpp
CONFLICT (content): Merge conflict in src/libslic3r/PerimeterGenerator.cpp
CONFLICT (content): Merge conflict in src/libslic3r/Point.hpp
CONFLICT (content): Merge conflict in src/libslic3r/PrintConfig.hpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/ConfigWizard.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/GCodeViewer.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/GLCanvas3D.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/GUI_App.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
CONFLICT (content): Merge conflict in src/slic3r/Utils/FixModelByWin10.cpp
CONFLICT (modify/delete): t/perimeters.t deleted in HEAD and modified in master_250. Version master_250 of t/perimeters.t left in tree.
CONFLICT (content): Merge conflict in tests/fff_print/CMakeLists.txt
CONFLICT (content): Merge conflict in tests/fff_print/test_fill.cpp
CONFLICT (content): Merge conflict in version.inc
CONFLICT (modify/delete): xs/xsp/PerimeterGenerator.xsp deleted in HEAD and modified in master_250. Version master_250 of xs/xsp/PerimeterGenerator.xsp left in tree.
