Unnecessary regions were created for a modifier over a volume or a modifier,
where the modifier did not modify any of its parent's properties.
This lead to an explosion of regions for this particular 3MF.
Fixes Non Responsive & Memory Leak when opening or changing this 3MF project #7220
"with sheath" now again uses the lighweight zig-zag algorithm
for the sparse support columns, while PrusaSlicer 2.4.0-alpha1
to PrusaSlicer 2.4.0-beta1 used the new "stable" zig-zag
algorithm for both the non-sheathed and sheathed sparse support columns
creating unnecessarily thick support column perimeters.
{num_objects} - number of printable objects on the plater.
{num_instances} - number of printable instances on the plater, adding up
all printable instances of all objects.
Implements #2735#3339#4607
round() rounds to an integer.
This is a popular request, for example #3472
digits(value, num_digits, num_decimals) rounds to num_digits and
num_decimals, left filled with spaces.
digits(value, num_digits) the same as digits(value, num_digits, 0)
Neither decimal separator nor any decimals after decimal separator
are emitted.
zdigits(...) is the same as digits(...) only left filled with zeros.
If the result does not fit num_digits, the result is never trimmed.
support blockers / enforcers.
All slicing functions shall produce consistent results with the same mesh, same transformation matrix and slicing parameters.
Namely, slice_mesh_slabs() shall produce consistent results with slice_mesh() and slice_mesh_ex() in the sense, that projections made by
slice_mesh_slabs() shall fall onto slicing planes produced by slice_mesh().
Before this commit, slice_mesh_slabs() projected bottom facing faces upwards to its coplanar slicing plane,
which is different from how slice_mesh() or slice_mesh_ex() work, leading to ignored support enforcer / blocker strokes.
interface layers if possible. This should always be possible with
soluble supports and it should have been done long time ago.
For non-soluble supports, it may or may not be possible to merge
these layers: They will only be merged if they are extruded without
bridging and with the same layer height.
Fixes Support enforcer interfaces not generated as needed. #6784
or at least some of the issues reported.
Experimental: Added experimental filtering of propagated support columns
to two extrusions, overlapping by maximum 20%.
This filtering step will remove spurious columns that do not support
anything, but the filtering step may remove supports supporting tiny
islands. Those supports would likely not be printable anyways without
the user intervention (extending the supported area by painting).
