package Slic3r::Print::Object;
# extends c++ class Slic3r::PrintObject (Print.xsp)
use strict;
use warnings;
use List::Util qw(min max sum first);
use Slic3r::Flow ':roles';
use Slic3r::Geometry qw(X Y Z PI scale unscale chained_path epsilon);
use Slic3r::Geometry::Clipper qw(diff diff_ex intersection intersection_ex union union_ex
offset offset_ex offset2 offset2_ex JT_MITER);
use Slic3r::Print::State ':steps';
use Slic3r::Surface ':types';
# If enabled, phases of prepare_infill will be written into SVG files to an "out" directory.
our $SLIC3R_DEBUG_SLICE_PROCESSING = 0;
sub layers {
my $self = shift;
return [ map $self->get_layer($_), 0..($self->layer_count - 1) ];
}
sub support_layers {
my $self = shift;
return [ map $self->get_support_layer($_), 0..($self->support_layer_count - 1) ];
}
# 1) Decides Z positions of the layers,
# 2) Initializes layers and their regions
# 3) Slices the object meshes
# 4) Slices the modifier meshes and reclassifies the slices of the object meshes by the slices of the modifier meshes
# 5) Applies size compensation (offsets the slices in XY plane)
# 6) Replaces bad slices by the slices reconstructed from the upper/lower layer
# Resulting expolygons of layer regions are marked as Internal.
#
# this should be idempotent
sub slice {
my $self = shift;
return if $self->step_done(STEP_SLICE);
$self->set_step_started(STEP_SLICE);
$self->print->status_cb->(10, "Processing triangulated mesh");
$self->_slice;
my $warning = $self->_fix_slicing_errors;
warn $warning if (defined($warning) && $warning ne '');
# simplify slices if required
$self->_simplify_slices(scale($self->print->config->resolution))
if ($self->print->config->resolution);
die "No layers were detected. You might want to repair your STL file(s) or check their size or thickness and retry.\n"
if !@{$self->layers};
$self->set_typed_slices(0);
$self->set_step_done(STEP_SLICE);
}
# 1) Merges typed region slices into stInternal type.
# 2) Increases an "extra perimeters" counter at region slices where needed.
# 3) Generates perimeters, gap fills and fill regions (fill regions of type stInternal).
sub make_perimeters {
my ($self) = @_;
# prerequisites
$self->slice;
if (! $self->step_done(STEP_PERIMETERS)) {
$self->print->status_cb->(20, "Generating perimeters");
$self->_make_perimeters;
}
}
sub prepare_infill {
my ($self) = @_;
# prerequisites
$self->make_perimeters;
return if $self->step_done(STEP_PREPARE_INFILL);
$self->set_step_started(STEP_PREPARE_INFILL);
$self->print->status_cb->(30, "Preparing infill");
# This will assign a type (top/bottom/internal) to $layerm->slices.
# Then the classifcation of $layerm->slices is transfered onto
# the $layerm->fill_surfaces by clipping $layerm->fill_surfaces
# by the cummulative area of the previous $layerm->fill_surfaces.
$self->detect_surfaces_type;
# Mark the object to have the region slices classified (typed, which also means they are split based on whether they are supported, bridging, top layers etc.)
$self->set_typed_slices(1);
# Decide what surfaces are to be filled.
# Here the S_TYPE_TOP / S_TYPE_BOTTOMBRIDGE / S_TYPE_BOTTOM infill is turned to just S_TYPE_INTERNAL if zero top / bottom infill layers are configured.
# Also tiny S_TYPE_INTERNAL surfaces are turned to S_TYPE_INTERNAL_SOLID.
# BOOST_LOG_TRIVIAL(info) << "Preparing fill surfaces...";
$_->prepare_fill_surfaces for map @{$_->regions}, @{$self->layers};
# this will detect bridges and reverse bridges
# and rearrange top/bottom/internal surfaces
# It produces enlarged overlapping bridging areas.
#
# 1) S_TYPE_BOTTOMBRIDGE / S_TYPE_BOTTOM infill is grown by 3mm and clipped by the total infill area. Bridges are detected. The areas may overlap.
# 2) S_TYPE_TOP is grown by 3mm and clipped by the grown bottom areas. The areas may overlap.
# 3) Clip the internal surfaces by the grown top/bottom surfaces.
# 4) Merge surfaces with the same style. This will mostly get rid of the overlaps.
#FIXME This does not likely merge surfaces, which are supported by a material with different colors, but same properties.
$self->process_external_surfaces;
# Add solid fills to ensure the shell vertical thickness.
$self->discover_vertical_shells;
# Debugging output.
if ($SLIC3R_DEBUG_SLICE_PROCESSING) {
for my $region_id (0 .. ($self->print->region_count-1)) {
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->get_layer($i)->regions->[$region_id];
$layerm->export_region_slices_to_svg_debug("6_discover_vertical_shells-final");
$layerm->export_region_fill_surfaces_to_svg_debug("6_discover_vertical_shells-final");
} # for each layer
} # for each region
}
# Detect, which fill surfaces are near external layers.
# They will be split in internal and internal-solid surfaces.
# The purpose is to add a configurable number of solid layers to support the TOP surfaces
# and to add a configurable number of solid layers above the BOTTOM / BOTTOMBRIDGE surfaces
# to close these surfaces reliably.
#FIXME Vojtech: Is this a good place to add supporting infills below sloping perimeters?
$self->discover_horizontal_shells;
if ($SLIC3R_DEBUG_SLICE_PROCESSING) {
# Debugging output.
for my $region_id (0 .. ($self->print->region_count-1)) {
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->get_layer($i)->regions->[$region_id];
$layerm->export_region_slices_to_svg_debug("7_discover_horizontal_shells-final");
$layerm->export_region_fill_surfaces_to_svg_debug("7_discover_horizontal_shells-final");
} # for each layer
} # for each region
}
# Only active if config->infill_only_where_needed. This step trims the sparse infill,
# so it acts as an internal support. It maintains all other infill types intact.
# Here the internal surfaces and perimeters have to be supported by the sparse infill.
#FIXME The surfaces are supported by a sparse infill, but the sparse infill is only as large as the area to support.
# Likely the sparse infill will not be anchored correctly, so it will not work as intended.
# Also one wishes the perimeters to be supported by a full infill.
$self->clip_fill_surfaces;
if ($SLIC3R_DEBUG_SLICE_PROCESSING) {
# Debugging output.
for my $region_id (0 .. ($self->print->region_count-1)) {
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->get_layer($i)->regions->[$region_id];
$layerm->export_region_slices_to_svg_debug("8_clip_surfaces-final");
$layerm->export_region_fill_surfaces_to_svg_debug("8_clip_surfaces-final");
} # for each layer
} # for each region
}
# the following step needs to be done before combination because it may need
# to remove only half of the combined infill
$self->bridge_over_infill;
# combine fill surfaces to honor the "infill every N layers" option
$self->combine_infill;
# Debugging output.
if ($SLIC3R_DEBUG_SLICE_PROCESSING) {
for my $region_id (0 .. ($self->print->region_count-1)) {
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->get_layer($i)->regions->[$region_id];
$layerm->export_region_slices_to_svg_debug("9_prepare_infill-final");
$layerm->export_region_fill_surfaces_to_svg_debug("9_prepare_infill-final");
} # for each layer
} # for each region
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layer = $self->get_layer($i);
$layer->export_region_slices_to_svg_debug("9_prepare_infill-final");
$layer->export_region_fill_surfaces_to_svg_debug("9_prepare_infill-final");
} # for each layer
}
$self->set_step_done(STEP_PREPARE_INFILL);
}
sub infill {
my ($self) = @_;
# prerequisites
$self->prepare_infill;
$self->_infill;
}
sub generate_support_material {
my $self = shift;
# prerequisites
$self->slice;
return if $self->step_done(STEP_SUPPORTMATERIAL);
$self->set_step_started(STEP_SUPPORTMATERIAL);
$self->clear_support_layers;
if (($self->config->support_material || $self->config->raft_layers > 0) && scalar(@{$self->layers}) > 1) {
$self->print->status_cb->(85, "Generating support material");
# New supports, C++ implementation.
$self->_generate_support_material;
}
$self->set_step_done(STEP_SUPPORTMATERIAL);
my $stats = sprintf "Weight: %.1fg, Cost: %.1f" , $self->print->total_weight, $self->print->total_cost;
$self->print->status_cb->(85, $stats);
}
# Idempotence of this method is guaranteed by the fact that we don't remove things from
# fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries.
sub clip_fill_surfaces {
my $self = shift;
return unless $self->config->infill_only_where_needed;
# We only want infill under ceilings; this is almost like an
# internal support material.
# proceed top-down skipping bottom layer
my $upper_internal = [];
for my $layer_id (reverse 1..($self->layer_count - 1)) {
my $layer = $self->get_layer($layer_id);
my $lower_layer = $self->get_layer($layer_id-1);
# detect things that we need to support
my $overhangs = []; # Polygons
# we need to support any solid surface
push @$overhangs, map $_->p,
grep $_->is_solid, map @{$_->fill_surfaces}, @{$layer->regions};
# we also need to support perimeters when there's at least one full
# unsupported loop
{
# get perimeters area as the difference between slices and fill_surfaces
my $perimeters = diff(
[ map @$_, @{$layer->slices} ],
[ map $_->p, map @{$_->fill_surfaces}, @{$layer->regions} ],
);
# only consider the area that is not supported by lower perimeters
$perimeters = intersection(
$perimeters,
[ map $_->p, map @{$_->fill_surfaces}, @{$lower_layer->regions} ],
1,
);
# only consider perimeter areas that are at least one extrusion width thick
#FIXME Offset2 eats out from both sides, while the perimeters are create outside in.
#Should the $pw not be half of the current value?
my $pw = min(map $_->flow(FLOW_ROLE_PERIMETER)->scaled_width, @{$layer->regions});
$perimeters = offset2($perimeters, -$pw, +$pw);
# append such thick perimeters to the areas that need support
push @$overhangs, @$perimeters;
}
# find new internal infill
$upper_internal = my $new_internal = intersection(
[
@$overhangs,
@$upper_internal,
],
[
# our current internal fill boundaries
map $_->p,
grep $_->surface_type == S_TYPE_INTERNAL || $_->surface_type == S_TYPE_INTERNALVOID,
map @{$_->fill_surfaces}, @{$lower_layer->regions}
],
);
# apply new internal infill to regions
foreach my $layerm (@{$lower_layer->regions}) {
my (@internal, @other) = ();
foreach my $surface (map $_->clone, @{$layerm->fill_surfaces}) {
if ($surface->surface_type == S_TYPE_INTERNAL || $surface->surface_type == S_TYPE_INTERNALVOID) {
push @internal, $surface;
} else {
push @other, $surface;
}
}
my @new = map Slic3r::Surface->new(
expolygon => $_,
surface_type => S_TYPE_INTERNAL,
),
@{intersection_ex(
[ map $_->p, @internal ],
$new_internal,
1,
)};
push @other, map Slic3r::Surface->new(
expolygon => $_,
surface_type => S_TYPE_INTERNALVOID,
),
@{diff_ex(
[ map $_->p, @internal ],
$new_internal,
1,
)};
# If there are voids it means that our internal infill is not adjacent to
# perimeters. In this case it would be nice to add a loop around infill to
# make it more robust and nicer. TODO.
$layerm->fill_surfaces->clear;
$layerm->fill_surfaces->append($_) for (@new, @other);
if ($SLIC3R_DEBUG_SLICE_PROCESSING) {
$layerm->export_region_fill_surfaces_to_svg_debug("6_clip_fill_surfaces");
}
}
}
}
sub discover_horizontal_shells {
my $self = shift;
Slic3r::debugf "==> DISCOVERING HORIZONTAL SHELLS\n";
for my $region_id (0 .. ($self->print->region_count-1)) {
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->get_layer($i)->regions->[$region_id];
if ($layerm->region->config->solid_infill_every_layers && $layerm->region->config->fill_density > 0
&& ($i % $layerm->region->config->solid_infill_every_layers) == 0) {
# This is the layer to put the sparse infill in. Mark S_TYPE_INTERNAL surfaces as S_TYPE_INTERNALSOLID or S_TYPE_INTERNALBRIDGE.
# If the sparse infill is not active, the internal surfaces are of type S_TYPE_INTERNAL.
my $type = $layerm->region->config->fill_density == 100 ? S_TYPE_INTERNALSOLID : S_TYPE_INTERNALBRIDGE;
$_->surface_type($type) for @{$layerm->fill_surfaces->filter_by_type(S_TYPE_INTERNAL)};
}
# If ensure_vertical_shell_thickness, then the rest has already been performed by discover_vertical_shells().
next if ($layerm->region->config->ensure_vertical_shell_thickness);
EXTERNAL: foreach my $type (S_TYPE_TOP, S_TYPE_BOTTOM, S_TYPE_BOTTOMBRIDGE) {
# find slices of current type for current layer
# use slices instead of fill_surfaces because they also include the perimeter area
# which needs to be propagated in shells; we need to grow slices like we did for
# fill_surfaces though. Using both ungrown slices and grown fill_surfaces will
# not work in some situations, as there won't be any grown region in the perimeter
# area (this was seen in a model where the top layer had one extra perimeter, thus
# its fill_surfaces were thinner than the lower layer's infill), however it's the best
# solution so far. Growing the external slices by EXTERNAL_INFILL_MARGIN will put
# too much solid infill inside nearly-vertical slopes.
my $solid = [
# Surfaces including the area of perimeters. Everything, that is visible from the top / bottom
# (not covered by a layer above / below).
# This does not contain the areas covered by perimeters!
(map $_->p, @{$layerm->slices->filter_by_type($type)}),
# Infill areas (slices without the perimeters).
(map $_->p, @{$layerm->fill_surfaces->filter_by_type($type)}),
];
next if !@$solid;
Slic3r::debugf "Layer %d has %s surfaces\n", $i, ($type == S_TYPE_TOP) ? 'top' : 'bottom';
my $solid_layers = ($type == S_TYPE_TOP)
? $layerm->region->config->top_solid_layers
: $layerm->region->config->bottom_solid_layers;
NEIGHBOR: for (my $n = ($type == S_TYPE_TOP) ? $i-1 : $i+1;
abs($n - $i) < $solid_layers;
($type == S_TYPE_TOP) ? $n-- : $n++) {
next if $n < 0 || $n >= $self->layer_count;
Slic3r::debugf " looking for neighbors on layer %d...\n", $n;
# Reference to the lower layer of a TOP surface, or an upper layer of a BOTTOM surface.
my $neighbor_layerm = $self->get_layer($n)->regions->[$region_id];
# Reference to the neighbour fill surfaces.
my $neighbor_fill_surfaces = $neighbor_layerm->fill_surfaces;
# Clone because we will use these surfaces even after clearing the collection.
my @neighbor_fill_surfaces = map $_->clone, @$neighbor_fill_surfaces;
# find intersection between neighbor and current layer's surfaces
# intersections have contours and holes
# we update $solid so that we limit the next neighbor layer to the areas that were
# found on this one - in other words, solid shells on one layer (for a given external surface)
# are always a subset of the shells found on the previous shell layer
# this approach allows for DWIM in hollow sloping vases, where we want bottom
# shells to be generated in the base but not in the walls (where there are many
# narrow bottom surfaces): reassigning $solid will consider the 'shadow' of the
# upper perimeter as an obstacle and shell will not be propagated to more upper layers
#FIXME How does it work for S_TYPE_INTERNALBRIDGE? This is set for sparse infill. Likely this does not work.
my $new_internal_solid = $solid = intersection(
$solid,
[ map $_->p, grep { ($_->surface_type == S_TYPE_INTERNAL) || ($_->surface_type == S_TYPE_INTERNALSOLID) } @neighbor_fill_surfaces ],
1,
);
next EXTERNAL if !@$new_internal_solid;
if ($layerm->region->config->fill_density == 0) {
# if we're printing a hollow object we discard any solid shell thinner
# than a perimeter width, since it's probably just crossing a sloping wall
# and it's not wanted in a hollow print even if it would make sense when
# obeying the solid shell count option strictly (DWIM!)
my $margin = $neighbor_layerm->flow(FLOW_ROLE_EXTERNAL_PERIMETER)->scaled_width;
my $regularized = offset2($new_internal_solid, -$margin, +$margin, JT_MITER, 5);
my $too_narrow = diff(
$new_internal_solid,
$regularized,
1,
);
# Trim the regularized region by the original region.
$new_internal_solid = $solid = intersection(
$new_internal_solid,
$regularized,
) if @$too_narrow;
}
# make sure the new internal solid is wide enough, as it might get collapsed
# when spacing is added in Fill.pm
if ($layerm->region->config->ensure_vertical_shell_thickness) {
# The possible thin sickles of top / bottom surfaces on steeply sloping surfaces touch
# the projections of top / bottom perimeters, therefore they will be sufficiently inflated by
# merging them with the projections of the top / bottom perimeters.
} else {
#FIXME Vojtech: Disable this and you will be sorry.
# https://github.com/prusa3d/Slic3r/issues/26 bottom
my $margin = 3 * $layerm->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width; # require at least this size
# we use a higher miterLimit here to handle areas with acute angles
# in those cases, the default miterLimit would cut the corner and we'd
# get a triangle in $too_narrow; if we grow it below then the shell
# would have a different shape from the external surface and we'd still
# have the same angle, so the next shell would be grown even more and so on.
my $too_narrow = diff(
$new_internal_solid,
offset2($new_internal_solid, -$margin, +$margin, JT_MITER, 5),
1,
);
if (@$too_narrow) {
# grow the collapsing parts and add the extra area to the neighbor layer
# as well as to our original surfaces so that we support this
# additional area in the next shell too
# make sure our grown surfaces don't exceed the fill area
my @grown = @{intersection(
offset($too_narrow, +$margin),
# Discard bridges as they are grown for anchoring and we can't
# remove such anchors. (This may happen when a bridge is being
# anchored onto a wall where little space remains after the bridge
# is grown, and that little space is an internal solid shell so
# it triggers this too_narrow logic.)
[ map $_->p, grep { $_->is_internal && !$_->is_bridge } @neighbor_fill_surfaces ],
)};
$new_internal_solid = $solid = [ @grown, @$new_internal_solid ];
}
}
# internal-solid are the union of the existing internal-solid surfaces
# and new ones
my $internal_solid = union_ex([
( map $_->p, grep $_->surface_type == S_TYPE_INTERNALSOLID, @neighbor_fill_surfaces ),
@$new_internal_solid,
]);
# subtract intersections from layer surfaces to get resulting internal surfaces
my $internal = diff_ex(
[ map $_->p, grep $_->surface_type == S_TYPE_INTERNAL, @neighbor_fill_surfaces ],
[ map @$_, @$internal_solid ],
1,
);
Slic3r::debugf " %d internal-solid and %d internal surfaces found\n",
scalar(@$internal_solid), scalar(@$internal);
# assign resulting internal surfaces to layer
$neighbor_fill_surfaces->clear;
$neighbor_fill_surfaces->append($_)
for map Slic3r::Surface->new(expolygon => $_, surface_type => S_TYPE_INTERNAL),
@$internal;
# assign new internal-solid surfaces to layer
$neighbor_fill_surfaces->append($_)
for map Slic3r::Surface->new(expolygon => $_, surface_type => S_TYPE_INTERNALSOLID),
@$internal_solid;
# assign top and bottom surfaces to layer
foreach my $s (@{Slic3r::Surface::Collection->new(grep { ($_->surface_type == S_TYPE_TOP) || $_->is_bottom } @neighbor_fill_surfaces)->group}) {
my $solid_surfaces = diff_ex(
[ map $_->p, @$s ],
[ map @$_, @$internal_solid, @$internal ],
1,
);
$neighbor_fill_surfaces->append($_)
for map $s->[0]->clone(expolygon => $_), @$solid_surfaces;
}
}
} # foreach my $type (S_TYPE_TOP, S_TYPE_BOTTOM, S_TYPE_BOTTOMBRIDGE)
} # for each layer
} # for each region
# Debugging output.
if ($SLIC3R_DEBUG_SLICE_PROCESSING) {
for my $region_id (0 .. ($self->print->region_count-1)) {
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->get_layer($i)->regions->[$region_id];
$layerm->export_region_slices_to_svg_debug("5_discover_horizontal_shells");
$layerm->export_region_fill_surfaces_to_svg_debug("5_discover_horizontal_shells");
} # for each layer
} # for each region
}
}
# combine fill surfaces across layers to honor the "infill every N layers" option
# Idempotence of this method is guaranteed by the fact that we don't remove things from
# fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries.
sub combine_infill {
my $self = shift;
# define the type used for voids
my %voidtype = (
&S_TYPE_INTERNAL() => S_TYPE_INTERNALVOID,
);
# work on each region separately
for my $region_id (0 .. ($self->print->region_count-1)) {
my $region = $self->print->get_region($region_id);
my $every = $region->config->infill_every_layers;
next unless $every > 1 && $region->config->fill_density > 0;
# limit the number of combined layers to the maximum height allowed by this regions' nozzle
my $nozzle_diameter = min(
$self->print->config->get_at('nozzle_diameter', $region->config->infill_extruder-1),
$self->print->config->get_at('nozzle_diameter', $region->config->solid_infill_extruder-1),
);
# define the combinations
my %combine = (); # layer_idx => number of additional combined lower layers
{
my $current_height = my $layers = 0;
for my $layer_idx (0 .. ($self->layer_count-1)) {
my $layer = $self->get_layer($layer_idx);
next if $layer->id == 0; # skip first print layer (which may not be first layer in array because of raft)
my $height = $layer->height;
# check whether the combination of this layer with the lower layers' buffer
# would exceed max layer height or max combined layer count
if ($current_height + $height >= $nozzle_diameter + epsilon || $layers >= $every) {
# append combination to lower layer
$combine{$layer_idx-1} = $layers;
$current_height = $layers = 0;
}
$current_height += $height;
$layers++;
}
# append lower layers (if any) to uppermost layer
$combine{$self->layer_count-1} = $layers;
}
# loop through layers to which we have assigned layers to combine
for my $layer_idx (sort keys %combine) {
next unless $combine{$layer_idx} > 1;
# get all the LayerRegion objects to be combined
my @layerms = map $self->get_layer($_)->get_region($region_id),
($layer_idx - ($combine{$layer_idx}-1) .. $layer_idx);
# only combine internal infill
for my $type (S_TYPE_INTERNAL) {
# we need to perform a multi-layer intersection, so let's split it in pairs
# initialize the intersection with the candidates of the lowest layer
my $intersection = [ map $_->expolygon, @{$layerms[0]->fill_surfaces->filter_by_type($type)} ];
# start looping from the second layer and intersect the current intersection with it
for my $layerm (@layerms[1 .. $#layerms]) {
$intersection = intersection_ex(
[ map @$_, @$intersection ],
[ map @{$_->expolygon}, @{$layerm->fill_surfaces->filter_by_type($type)} ],
);
}
my $area_threshold = $layerms[0]->infill_area_threshold;
@$intersection = grep $_->area > $area_threshold, @$intersection;
next if !@$intersection;
Slic3r::debugf " combining %d %s regions from layers %d-%d\n",
scalar(@$intersection),
($type == S_TYPE_INTERNAL ? 'internal' : 'internal-solid'),
$layer_idx-($every-1), $layer_idx;
# $intersection now contains the regions that can be combined across the full amount of layers
# so let's remove those areas from all layers
my @intersection_with_clearance = map @{$_->offset(
$layerms[-1]->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width / 2
+ $layerms[-1]->flow(FLOW_ROLE_PERIMETER)->scaled_width / 2
# Because fill areas for rectilinear and honeycomb are grown
# later to overlap perimeters, we need to counteract that too.
+ (($type == S_TYPE_INTERNALSOLID || $region->config->fill_pattern =~ /(rectilinear|grid|line|honeycomb)/)
? $layerms[-1]->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width
: 0)
)}, @$intersection;
foreach my $layerm (@layerms) {
my @this_type = @{$layerm->fill_surfaces->filter_by_type($type)};
my @other_types = map $_->clone, grep $_->surface_type != $type, @{$layerm->fill_surfaces};
my @new_this_type = map Slic3r::Surface->new(expolygon => $_, surface_type => $type),
@{diff_ex(
[ map $_->p, @this_type ],
[ @intersection_with_clearance ],
)};
# apply surfaces back with adjusted depth to the uppermost layer
if ($layerm->layer->id == $self->get_layer($layer_idx)->id) {
push @new_this_type,
map Slic3r::Surface->new(
expolygon => $_,
surface_type => $type,
thickness => sum(map $_->layer->height, @layerms),
thickness_layers => scalar(@layerms),
),
@$intersection;
} else {
# save void surfaces
push @new_this_type,
map Slic3r::Surface->new(expolygon => $_, surface_type => $voidtype{$type}),
@{intersection_ex(
[ map @{$_->expolygon}, @this_type ],
[ @intersection_with_clearance ],
)};
}
$layerm->fill_surfaces->clear;
$layerm->fill_surfaces->append($_) for (@new_this_type, @other_types);
}
}
}
}
}
1;