Interior mesh can be empty and TriangleMeshSlicer would fail in that case.
Also, recalculating shared vertices after repair should probably be done, TMS relies on it.
Fixes Connecting / expanding Bottom Layers to Vase Perimeter #253
Fixes Slicing error in vase mode #452
Fixes Slicing Issue (Vase Mode, 0.6mm dmr nozzle) #1887
Fixes Top fill pattern isn't used in spiral vase mode #2533
Fixes Cisar's vase doesn't slice correctly, creates artefacts #3595
When the model is sliced, all the contours are newly oriented
counter-clockwise (even holes), merged and then only the largest area
contour is retained. In perimeter generator, if the largest contour
splits into multiple perimeters, newly only the largest area perimeter
is retained in spiral vase mode. These two changes solve #3595 and similar.
The infill is newly calculated only for the bottom solid layers
if the spiral vase mode is active (removes various unwanted infill
along the vase walls), and the last bottom solid layer is switched
to a top solid pattern (solves #2533).
The thin walls are newly enforced to be disabled in spiral vase mode,
and the "ensure vertical shell wall" is enforced in spiral vase mode
to extend the bottom of the vase to the vase hull (fixes#253).
collisions against already printed objects: Rotation of an object
was not being taken into account.
Fixes#2450 PrusaSlicer 2.0 Sequential printing vs rotate object
Fixes#3585 Always Sequential Printing Error (Regardless of setting, placement or object size)
Fixed some collisions in sequential print just after arrangement by
making the validation using a slightly lower extruder radius value
than the arrangement.
Refactored PrintObject coordinate system so that the PrintObject's
coordinate system is always centered in respect to its ModelObject's
geometries. This refactoring may improve path planning a bit and
it may lower the requirements on bits representing Clipper coordinates
by 1 bit.
slaposHollowing was divided into slaposHollowing and slaposDrillHoles on master
This commit takes this into account on the code that was merged from lm_drilling_backend_rebased
remove duplicate code
Mark conversion constructors of EigenMesh3D `explicit`
Working on mesh simplification for hollowed interior
Fix bug SPE-1074: crash with empty supports and disabled pad.
fix regression after refactor
Remove unfinished code
Fix missing includes and dumb comments
Bugfix: SLA support tree is is now given the hollowed mesh, not the original
Added ImGui separators and change background alpha in hollowing gizmo dialog (to match the other gizmos)
