976 lines
44 KiB
Perl
976 lines
44 KiB
Perl
package Slic3r::Print::Object;
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use Moo;
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use List::Util qw(min max sum first);
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use Slic3r::Flow ':roles';
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use Slic3r::Geometry qw(X Y Z PI scale unscale deg2rad rad2deg scaled_epsilon chained_path);
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use Slic3r::Geometry::Clipper qw(diff diff_ex intersection intersection_ex union union_ex
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offset offset_ex offset2 offset2_ex CLIPPER_OFFSET_SCALE JT_MITER);
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use Slic3r::Print::State ':steps';
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use Slic3r::Surface ':types';
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has 'print' => (is => 'ro', weak_ref => 1, required => 1);
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has 'model_object' => (is => 'ro', required => 1);
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has 'region_volumes' => (is => 'rw', default => sub { [] }); # by region_id
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has 'copies' => (is => 'ro'); # Slic3r::Point objects in scaled G-code coordinates
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has 'config' => (is => 'ro', default => sub { Slic3r::Config::PrintObject->new });
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has 'layer_height_ranges' => (is => 'rw', default => sub { [] }); # [ z_min, z_max, layer_height ]
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has 'size' => (is => 'rw'); # XYZ in scaled coordinates
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has '_copies_shift' => (is => 'rw'); # scaled coordinates to add to copies (to compensate for the alignment operated when creating the object but still preserving a coherent API for external callers)
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has '_shifted_copies' => (is => 'rw'); # Slic3r::Point objects in scaled G-code coordinates in our coordinates
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has 'layers' => (is => 'rw', default => sub { [] });
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has 'support_layers' => (is => 'rw', default => sub { [] });
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has 'fill_maker' => (is => 'lazy');
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has '_state' => (is => 'ro', default => sub { Slic3r::Print::State->new });
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sub BUILD {
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my $self = shift;
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# translate meshes so that we work with smaller coordinates
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{
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# compute the bounding box of the supplied meshes
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my @meshes = map $self->model_object->volumes->[$_]->mesh,
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map @$_,
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grep defined $_,
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@{$self->region_volumes};
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my $bb = @meshes
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? $meshes[0]->bounding_box
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: Slic3r::Geometry::BoundingBoxf3->new;
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$bb->merge($_->bounding_box) for @meshes[1..$#meshes];
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# Translate meshes so that our toolpath generation algorithms work with smaller
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# XY coordinates; this translation is an optimization and not strictly required.
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# However, this also aligns object to Z = 0, which on the contrary is required
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# since we don't assume input is already aligned.
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# We store the XY translation so that we can place copies correctly in the output G-code
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# (copies are expressed in G-code coordinates and this translation is not publicly exposed).
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$self->_copies_shift(Slic3r::Point->new_scale($bb->x_min, $bb->y_min));
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$self->_trigger_copies;
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# Scale the object size and store it
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my $scaled_bb = $bb->clone;
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$scaled_bb->scale(1 / &Slic3r::SCALING_FACTOR);
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$self->size($scaled_bb->size);
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}
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}
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sub _build_fill_maker {
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my $self = shift;
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return Slic3r::Fill->new(bounding_box => $self->bounding_box);
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}
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sub _trigger_copies {
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my $self = shift;
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return if !defined $self->_copies_shift;
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# order copies with a nearest neighbor search and translate them by _copies_shift
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$self->_shifted_copies([
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map {
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my $c = $_->clone;
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$c->translate(@{ $self->_copies_shift });
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$c;
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} @{$self->copies}[@{chained_path($self->copies)}]
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]);
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$self->print->_state->invalidate(STEP_SKIRT);
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$self->print->_state->invalidate(STEP_BRIM);
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}
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# in unscaled coordinates
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sub add_copy {
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my ($self, $x, $y) = @_;
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push @{$self->copies}, Slic3r::Point->new_scale($x, $y);
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$self->_trigger_copies;
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}
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sub delete_last_copy {
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my ($self) = @_;
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pop @{$self->copies};
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$self->_trigger_copies;
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}
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sub delete_all_copies {
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my ($self) = @_;
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@{$self->copies} = ();
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$self->_trigger_copies;
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}
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# this is the *total* layer count
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# this value is not supposed to be compared with $layer->id
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# since they have different semantics
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sub layer_count {
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my $self = shift;
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return scalar @{ $self->layers } + scalar @{ $self->support_layers };
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}
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sub bounding_box {
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my $self = shift;
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# since the object is aligned to origin, bounding box coincides with size
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return Slic3r::Geometry::BoundingBox->new_from_points([
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Slic3r::Point->new(0,0),
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map Slic3r::Point->new($_->x, $_->y), $self->size #))
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]);
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}
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# this should be idempotent
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sub slice {
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my $self = shift;
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my %params = @_;
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# init layers
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{
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@{$self->layers} = ();
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# make layers taking custom heights into account
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my $print_z = my $slice_z = my $height = my $id = 0;
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# add raft layers
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if ($self->config->raft_layers > 0) {
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$print_z += $self->config->get_value('first_layer_height');
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$print_z += $self->config->layer_height * ($self->config->raft_layers - 1);
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$id += $self->config->raft_layers;
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}
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# loop until we have at least one layer and the max slice_z reaches the object height
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my $max_z = unscale($self->size->z);
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while (!@{$self->layers} || ($slice_z - $height) <= $max_z) {
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# assign the default height to the layer according to the general settings
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$height = ($id == 0)
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? $self->config->get_value('first_layer_height')
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: $self->config->layer_height;
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# look for an applicable custom range
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if (my $range = first { $_->[0] <= $slice_z && $_->[1] > $slice_z } @{$self->layer_height_ranges}) {
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$height = $range->[2];
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# if user set custom height to zero we should just skip the range and resume slicing over it
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if ($height == 0) {
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$slice_z += $range->[1] - $range->[0];
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next;
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}
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}
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$print_z += $height;
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$slice_z += $height/2;
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### Slic3r::debugf "Layer %d: height = %s; slice_z = %s; print_z = %s\n", $id, $height, $slice_z, $print_z;
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push @{$self->layers}, Slic3r::Layer->new(
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object => $self,
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id => $id,
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height => $height,
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print_z => $print_z,
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slice_z => $slice_z,
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);
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if (@{$self->layers} >= 2) {
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$self->layers->[-2]->upper_layer($self->layers->[-1]);
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}
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$id++;
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$slice_z += $height/2; # add the other half layer
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}
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}
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# make sure all layers contain layer region objects for all regions
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my $regions_count = $self->print->regions_count;
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foreach my $layer (@{ $self->layers }) {
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$layer->region($_) for 0 .. ($regions_count-1);
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}
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# get array of Z coordinates for slicing
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my @z = map $_->slice_z, @{$self->layers};
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# slice all non-modifier volumes
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for my $region_id (0..$#{$self->region_volumes}) {
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my $expolygons_by_layer = $self->_slice_region($region_id, \@z, 0);
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for my $layer_id (0..$#$expolygons_by_layer) {
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my $layerm = $self->layers->[$layer_id]->regions->[$region_id];
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$layerm->slices->clear;
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foreach my $expolygon (@{ $expolygons_by_layer->[$layer_id] }) {
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$layerm->slices->append(Slic3r::Surface->new(
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expolygon => $expolygon,
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surface_type => S_TYPE_INTERNAL,
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));
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}
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}
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}
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# then slice all modifier volumes
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if (@{$self->region_volumes} > 1) {
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for my $region_id (0..$#{$self->region_volumes}) {
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my $expolygons_by_layer = $self->_slice_region($region_id, \@z, 1);
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# loop through the other regions and 'steal' the slices belonging to this one
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for my $other_region_id (0..$#{$self->region_volumes}) {
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next if $other_region_id == $region_id;
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for my $layer_id (0..$#$expolygons_by_layer) {
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my $layerm = $self->layers->[$layer_id]->regions->[$region_id];
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my $other_layerm = $self->layers->[$layer_id]->regions->[$other_region_id];
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my $other_slices = [ map $_->p, @{$other_layerm->slices} ]; # Polygons
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my $my_parts = intersection_ex(
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$other_slices,
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[ map @$_, @{ $expolygons_by_layer->[$layer_id] } ],
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);
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next if !@$my_parts;
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# append new parts to our region
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foreach my $expolygon (@$my_parts) {
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$layerm->slices->append(Slic3r::Surface->new(
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expolygon => $expolygon,
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surface_type => S_TYPE_INTERNAL,
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));
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}
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# remove such parts from original region
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$other_layerm->slices->clear;
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$other_layerm->append($_) for @{ diff($other_slices, $my_parts) };
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}
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}
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}
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}
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# remove last layer(s) if empty
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pop @{$self->layers} while @{$self->layers} && (!map @{$_->slices}, @{$self->layers->[-1]->regions});
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foreach my $layer (@{ $self->layers }) {
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# merge all regions' slices to get islands
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$layer->make_slices;
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}
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# detect slicing errors
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my $warning_thrown = 0;
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for my $i (0 .. $#{$self->layers}) {
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my $layer = $self->layers->[$i];
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next unless $layer->slicing_errors;
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if (!$warning_thrown) {
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warn "The model has overlapping or self-intersecting facets. I tried to repair it, "
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. "however you might want to check the results or repair the input file and retry.\n";
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$warning_thrown = 1;
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}
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# try to repair the layer surfaces by merging all contours and all holes from
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# neighbor layers
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Slic3r::debugf "Attempting to repair layer %d\n", $i;
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foreach my $region_id (0 .. $#{$layer->regions}) {
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my $layerm = $layer->region($region_id);
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my (@upper_surfaces, @lower_surfaces);
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for (my $j = $i+1; $j <= $#{$self->layers}; $j++) {
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if (!$self->layers->[$j]->slicing_errors) {
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@upper_surfaces = @{$self->layers->[$j]->region($region_id)->slices};
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last;
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}
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}
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for (my $j = $i-1; $j >= 0; $j--) {
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if (!$self->layers->[$j]->slicing_errors) {
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@lower_surfaces = @{$self->layers->[$j]->region($region_id)->slices};
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last;
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}
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}
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my $union = union_ex([
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map $_->expolygon->contour, @upper_surfaces, @lower_surfaces,
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]);
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my $diff = diff_ex(
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[ map @$_, @$union ],
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[ map @{$_->expolygon->holes}, @upper_surfaces, @lower_surfaces, ],
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);
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$layerm->slices->clear;
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$layerm->slices->append(
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map Slic3r::Surface->new
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(expolygon => $_, surface_type => S_TYPE_INTERNAL),
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@$diff
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);
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}
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# update layer slices after repairing the single regions
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$layer->make_slices;
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}
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# remove empty layers from bottom
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my $first_object_layer_id = $self->config->raft_layers;
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while (@{$self->layers} && !@{$self->layers->[$first_object_layer_id]->slices}) {
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splice @{$self->layers}, $first_object_layer_id, 1;
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for (my $i = $first_object_layer_id; $i <= $#{$self->layers}; $i++) {
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$self->layers->[$i]->id($i);
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}
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}
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# simplify slices if required
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if ($self->print->config->resolution) {
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$self->_simplify_slices(scale($self->print->config->resolution));
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}
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}
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sub _slice_region {
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my ($self, $region_id, $z, $modifier) = @_;
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return [] if !defined $self->region_volumes->[$region_id];
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# compose mesh
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my $mesh;
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foreach my $volume_id (@{$self->region_volumes->[$region_id]}) {
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my $volume = $self->model_object->volumes->[$volume_id];
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next if $volume->modifier && !$modifier;
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next if !$volume->modifier && $modifier;
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if (defined $mesh) {
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$mesh->merge($volume->mesh);
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} else {
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$mesh = $volume->mesh->clone;
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}
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}
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next if !defined $mesh;
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# transform mesh
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# we ignore the per-instance transformations currently and only
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# consider the first one
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$self->model_object->instances->[0]->transform_mesh($mesh, 1);
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# align mesh to Z = 0 and apply XY shift
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$mesh->translate((map unscale(-$_), @{$self->_copies_shift}), -$self->model_object->bounding_box->z_min);
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# perform actual slicing
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return $mesh->slice($z);
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}
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sub make_perimeters {
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my $self = shift;
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# compare each layer to the one below, and mark those slices needing
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# one additional inner perimeter, like the top of domed objects-
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# this algorithm makes sure that at least one perimeter is overlapping
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# but we don't generate any extra perimeter if fill density is zero, as they would be floating
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# inside the object - infill_only_where_needed should be the method of choice for printing
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# hollow objects
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for my $region_id (0 .. ($self->print->regions_count-1)) {
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my $region = $self->print->regions->[$region_id];
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my $region_perimeters = $region->config->perimeters;
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if ($region->config->extra_perimeters && $region_perimeters > 0 && $region->config->fill_density > 0) {
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for my $i (0 .. $#{$self->layers}-1) {
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my $layerm = $self->layers->[$i]->regions->[$region_id];
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my $upper_layerm = $self->layers->[$i+1]->regions->[$region_id];
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my $perimeter_spacing = $layerm->flow(FLOW_ROLE_PERIMETER)->scaled_spacing;
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my $overlap = $perimeter_spacing; # one perimeter
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my $diff = diff(
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offset([ map @{$_->expolygon}, @{$layerm->slices} ], -($region_perimeters * $perimeter_spacing)),
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offset([ map @{$_->expolygon}, @{$upper_layerm->slices} ], -$overlap),
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);
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next if !@$diff;
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# if we need more perimeters, $diff should contain a narrow region that we can collapse
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# we use a higher miterLimit here to handle areas with acute angles
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# in those cases, the default miterLimit would cut the corner and we'd
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# get a triangle that would trigger a non-needed extra perimeter
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$diff = diff(
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$diff,
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offset2($diff, -$perimeter_spacing, +$perimeter_spacing, CLIPPER_OFFSET_SCALE, JT_MITER, 5),
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1,
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);
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next if !@$diff;
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# diff contains the collapsed area
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foreach my $slice (@{$layerm->slices}) {
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my $extra_perimeters = 0;
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CYCLE: while (1) {
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# compute polygons representing the thickness of the hypotetical new internal perimeter
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# of our slice
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$extra_perimeters++;
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my $hypothetical_perimeter = diff(
|
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offset($slice->expolygon->arrayref, -($perimeter_spacing * ($region_perimeters + $extra_perimeters-1))),
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offset($slice->expolygon->arrayref, -($perimeter_spacing * ($region_perimeters + $extra_perimeters))),
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);
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last CYCLE if !@$hypothetical_perimeter; # no extra perimeter is possible
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# only add the perimeter if there's an intersection with the collapsed area
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last CYCLE if !@{ intersection($diff, $hypothetical_perimeter) };
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Slic3r::debugf " adding one more perimeter at layer %d\n", $layerm->id;
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$slice->extra_perimeters($extra_perimeters);
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}
|
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}
|
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}
|
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}
|
||
}
|
||
|
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Slic3r::parallelize(
|
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threads => $self->print->config->threads,
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items => sub { 0 .. $#{$self->layers} },
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thread_cb => sub {
|
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my $q = shift;
|
||
while (defined (my $i = $q->dequeue)) {
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$self->layers->[$i]->make_perimeters;
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}
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},
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collect_cb => sub {},
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no_threads_cb => sub {
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$_->make_perimeters for @{$self->layers};
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},
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);
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# simplify slices (both layer and region slices),
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# we only need the max resolution for perimeters
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### This makes this method not-idempotent, so we keep it disabled for now.
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###$self->_simplify_slices(&Slic3r::SCALED_RESOLUTION);
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}
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sub detect_surfaces_type {
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my $self = shift;
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Slic3r::debugf "Detecting solid surfaces...\n";
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for my $region_id (0 .. ($self->print->regions_count-1)) {
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for my $i (0 .. $#{$self->layers}) {
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my $layerm = $self->layers->[$i]->regions->[$region_id];
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# prepare a reusable subroutine to make surface differences
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||
my $difference = sub {
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my ($subject, $clip, $result_type) = @_;
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my $diff = diff(
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[ map @$_, @$subject ],
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[ map @$_, @$clip ],
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||
);
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||
# collapse very narrow parts (using the safety offset in the diff is not enough)
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my $offset = $layerm->flow(FLOW_ROLE_PERIMETER)->scaled_width / 10;
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return map Slic3r::Surface->new(expolygon => $_, surface_type => $result_type),
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@{ offset2_ex($diff, -$offset, +$offset) };
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};
|
||
|
||
# comparison happens against the *full* slices (considering all regions)
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||
my $upper_layer = $self->layers->[$i+1];
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||
my $lower_layer = $i > 0 ? $self->layers->[$i-1] : undef;
|
||
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||
my (@bottom, @top, @internal) = ();
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||
|
||
# find top surfaces (difference between current surfaces
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||
# of current layer and upper one)
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||
if ($upper_layer) {
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||
@top = $difference->(
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[ map $_->expolygon, @{$layerm->slices} ],
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$upper_layer->slices,
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||
S_TYPE_TOP,
|
||
);
|
||
} else {
|
||
# if no upper layer, all surfaces of this one are solid
|
||
# we clone surfaces because we're going to clear the slices collection
|
||
@top = map $_->clone, @{$layerm->slices};
|
||
$_->surface_type(S_TYPE_TOP) for @top;
|
||
}
|
||
|
||
# find bottom surfaces (difference between current surfaces
|
||
# of current layer and lower one)
|
||
if ($lower_layer) {
|
||
# lower layer's slices are already Surface objects
|
||
@bottom = $difference->(
|
||
[ map $_->expolygon, @{$layerm->slices} ],
|
||
$lower_layer->slices,
|
||
S_TYPE_BOTTOM,
|
||
);
|
||
} else {
|
||
# if no lower layer, all surfaces of this one are solid
|
||
# we clone surfaces because we're going to clear the slices collection
|
||
@bottom = map $_->clone, @{$layerm->slices};
|
||
$_->surface_type(S_TYPE_BOTTOM) for @bottom;
|
||
}
|
||
|
||
# now, if the object contained a thin membrane, we could have overlapping bottom
|
||
# and top surfaces; let's do an intersection to discover them and consider them
|
||
# as bottom surfaces (to allow for bridge detection)
|
||
if (@top && @bottom) {
|
||
my $overlapping = intersection_ex([ map $_->p, @top ], [ map $_->p, @bottom ]);
|
||
Slic3r::debugf " layer %d contains %d membrane(s)\n", $layerm->id, scalar(@$overlapping)
|
||
if $Slic3r::debug;
|
||
@top = $difference->([map $_->expolygon, @top], $overlapping, S_TYPE_TOP);
|
||
}
|
||
|
||
# find internal surfaces (difference between top/bottom surfaces and others)
|
||
@internal = $difference->(
|
||
[ map $_->expolygon, @{$layerm->slices} ],
|
||
[ map $_->expolygon, @top, @bottom ],
|
||
S_TYPE_INTERNAL,
|
||
);
|
||
|
||
# save surfaces to layer
|
||
$layerm->slices->clear;
|
||
$layerm->slices->append(@bottom, @top, @internal);
|
||
|
||
Slic3r::debugf " layer %d has %d bottom, %d top and %d internal surfaces\n",
|
||
$layerm->id, scalar(@bottom), scalar(@top), scalar(@internal) if $Slic3r::debug;
|
||
}
|
||
|
||
# clip surfaces to the fill boundaries
|
||
foreach my $layer (@{$self->layers}) {
|
||
my $layerm = $layer->regions->[$region_id];
|
||
my $fill_boundaries = [ map $_->clone->p, @{$layerm->fill_surfaces} ];
|
||
$layerm->fill_surfaces->clear;
|
||
foreach my $surface (@{$layerm->slices}) {
|
||
my $intersection = intersection_ex(
|
||
[ $surface->p ],
|
||
$fill_boundaries,
|
||
);
|
||
$layerm->fill_surfaces->append(map Slic3r::Surface->new
|
||
(expolygon => $_, surface_type => $surface->surface_type),
|
||
@$intersection);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
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.
|
||
|
||
my $additional_margin = scale 3;
|
||
|
||
my $overhangs = []; # arrayref of polygons
|
||
for my $layer_id (reverse 0..$#{$self->layers}) {
|
||
my $layer = $self->layers->[$layer_id];
|
||
my @layer_internal = ();
|
||
my @new_internal = ();
|
||
|
||
# clip this layer's internal surfaces to @overhangs
|
||
foreach my $layerm (@{$layer->regions}) {
|
||
# we assume that this step is run before bridge_over_infill() and combine_infill()
|
||
# so these are the only internal types we might have
|
||
my (@internal, @other) = ();
|
||
foreach my $surface (map $_->clone, @{$layerm->fill_surfaces}) {
|
||
$surface->surface_type == S_TYPE_INTERNAL
|
||
? push @internal, $surface
|
||
: push @other, $surface;
|
||
}
|
||
|
||
# keep all the original internal surfaces to detect overhangs in this layer
|
||
push @layer_internal, @internal;
|
||
|
||
push @new_internal, my @new = map Slic3r::Surface->new(
|
||
expolygon => $_,
|
||
surface_type => S_TYPE_INTERNAL,
|
||
),
|
||
@{intersection_ex(
|
||
$overhangs,
|
||
[ map $_->p, @internal ],
|
||
)};
|
||
|
||
$layerm->fill_surfaces->clear;
|
||
$layerm->fill_surfaces->append(@new, @other);
|
||
}
|
||
|
||
# get this layer's overhangs defined as the full slice minus the internal infill
|
||
# (thus we also consider perimeters)
|
||
if ($layer_id > 0) {
|
||
my $solid = diff(
|
||
[ map @$_, @{$layer->slices} ],
|
||
\@layer_internal,
|
||
);
|
||
$overhangs = offset($solid, +$additional_margin);
|
||
push @$overhangs, @new_internal; # propagate upper overhangs
|
||
}
|
||
}
|
||
}
|
||
|
||
sub bridge_over_infill {
|
||
my $self = shift;
|
||
|
||
for my $region_id (0..$#{$self->print->regions}) {
|
||
my $fill_density = $self->print->regions->[$region_id]->config->fill_density;
|
||
next if $fill_density == 1 || $fill_density == 0;
|
||
|
||
for my $layer_id (1..$#{$self->layers}) {
|
||
my $layer = $self->layers->[$layer_id];
|
||
my $layerm = $layer->regions->[$region_id];
|
||
my $lower_layer = $self->layers->[$layer_id-1];
|
||
|
||
# compute the areas needing bridge math
|
||
my @internal_solid = @{$layerm->fill_surfaces->filter_by_type(S_TYPE_INTERNALSOLID)};
|
||
my @lower_internal = map @{$_->fill_surfaces->filter_by_type(S_TYPE_INTERNAL)}, @{$lower_layer->regions};
|
||
my $to_bridge = intersection_ex(
|
||
[ map $_->p, @internal_solid ],
|
||
[ map $_->p, @lower_internal ],
|
||
);
|
||
next unless @$to_bridge;
|
||
Slic3r::debugf "Bridging %d internal areas at layer %d\n", scalar(@$to_bridge), $layer_id;
|
||
|
||
# build the new collection of fill_surfaces
|
||
{
|
||
my @new_surfaces = map $_->clone, grep $_->surface_type != S_TYPE_INTERNALSOLID, @{$layerm->fill_surfaces};
|
||
push @new_surfaces, map Slic3r::Surface->new(
|
||
expolygon => $_,
|
||
surface_type => S_TYPE_INTERNALBRIDGE,
|
||
), @$to_bridge;
|
||
push @new_surfaces, map Slic3r::Surface->new(
|
||
expolygon => $_,
|
||
surface_type => S_TYPE_INTERNALSOLID,
|
||
), @{diff_ex(
|
||
[ map $_->p, @internal_solid ],
|
||
[ map @$_, @$to_bridge ],
|
||
1,
|
||
)};
|
||
$layerm->fill_surfaces->clear;
|
||
$layerm->fill_surfaces->append(@new_surfaces);
|
||
}
|
||
|
||
# exclude infill from the layers below if needed
|
||
# see discussion at https://github.com/alexrj/Slic3r/issues/240
|
||
# Update: do not exclude any infill. Sparse infill is able to absorb the excess material.
|
||
if (0) {
|
||
my $excess = $layerm->extruders->{infill}->bridge_flow->width - $layerm->height;
|
||
for (my $i = $layer_id-1; $excess >= $self->layers->[$i]->height; $i--) {
|
||
Slic3r::debugf " skipping infill below those areas at layer %d\n", $i;
|
||
foreach my $lower_layerm (@{$self->layers->[$i]->regions}) {
|
||
my @new_surfaces = ();
|
||
# subtract the area from all types of surfaces
|
||
foreach my $group (@{$lower_layerm->fill_surfaces->group}) {
|
||
push @new_surfaces, map $group->[0]->clone(expolygon => $_),
|
||
@{diff_ex(
|
||
[ map $_->p, @$group ],
|
||
[ map @$_, @$to_bridge ],
|
||
)};
|
||
push @new_surfaces, map Slic3r::Surface->new(
|
||
expolygon => $_,
|
||
surface_type => S_TYPE_INTERNALVOID,
|
||
), @{intersection_ex(
|
||
[ map $_->p, @$group ],
|
||
[ map @$_, @$to_bridge ],
|
||
)};
|
||
}
|
||
$lower_layerm->fill_surfaces->clear;
|
||
$lower_layerm->fill_surfaces->append(@new_surfaces);
|
||
}
|
||
|
||
$excess -= $self->layers->[$i]->height;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
sub process_external_surfaces {
|
||
my ($self) = @_;
|
||
|
||
for my $region_id (0 .. ($self->print->regions_count-1)) {
|
||
$self->layers->[0]->regions->[$region_id]->process_external_surfaces(undef);
|
||
for my $i (1 .. $#{$self->layers}) {
|
||
$self->layers->[$i]->regions->[$region_id]->process_external_surfaces($self->layers->[$i-1]);
|
||
}
|
||
}
|
||
}
|
||
|
||
sub discover_horizontal_shells {
|
||
my $self = shift;
|
||
|
||
Slic3r::debugf "==> DISCOVERING HORIZONTAL SHELLS\n";
|
||
|
||
for my $region_id (0 .. ($self->print->regions_count-1)) {
|
||
for (my $i = 0; $i <= $#{$self->layers}; $i++) {
|
||
my $layerm = $self->layers->[$i]->regions->[$region_id];
|
||
|
||
if ($layerm->config->solid_infill_every_layers && $layerm->config->fill_density > 0
|
||
&& ($i % $layerm->config->solid_infill_every_layers) == 0) {
|
||
$_->surface_type(S_TYPE_INTERNALSOLID) for @{$layerm->fill_surfaces->filter_by_type(S_TYPE_INTERNAL)};
|
||
}
|
||
|
||
EXTERNAL: foreach my $type (S_TYPE_TOP, S_TYPE_BOTTOM) {
|
||
# 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 = [
|
||
(map $_->p, @{$layerm->slices->filter_by_type($type)}),
|
||
(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->config->top_solid_layers
|
||
: $layerm->config->bottom_solid_layers;
|
||
NEIGHBOR: for (my $n = ($type == S_TYPE_TOP) ? $i-1 : $i+1;
|
||
abs($n - $i) <= $solid_layers-1;
|
||
($type == S_TYPE_TOP) ? $n-- : $n++) {
|
||
|
||
next if $n < 0 || $n > $#{$self->layers};
|
||
Slic3r::debugf " looking for neighbors on layer %d...\n", $n;
|
||
|
||
my $neighbor_fill_surfaces = $self->layers->[$n]->regions->[$region_id]->fill_surfaces;
|
||
my @neighbor_fill_surfaces = map $_->clone, @$neighbor_fill_surfaces; # clone because we will use these surfaces even after clearing the collection
|
||
|
||
# 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
|
||
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;
|
||
|
||
# make sure the new internal solid is wide enough, as it might get collapsed when
|
||
# spacing is added in Fill.pm
|
||
{
|
||
# 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 $margin = 3 * $layerm->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width; # require at least this size
|
||
my $too_narrow = diff(
|
||
$new_internal_solid,
|
||
offset2($new_internal_solid, -$margin, +$margin, CLIPPER_OFFSET_SCALE, JT_MITER, 5),
|
||
1,
|
||
);
|
||
|
||
# if some parts are going to collapse, use a different strategy according to fill density
|
||
if (@$too_narrow) {
|
||
if ($layerm->config->fill_density > 0) {
|
||
# if we have internal infill, 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),
|
||
[ map $_->p, @neighbor_fill_surfaces ],
|
||
)};
|
||
$new_internal_solid = $solid = [ @grown, @$new_internal_solid ];
|
||
} else {
|
||
# if we're printing a hollow object, we discard such small parts
|
||
$new_internal_solid = $solid = diff(
|
||
$new_internal_solid,
|
||
$too_narrow,
|
||
);
|
||
}
|
||
}
|
||
}
|
||
|
||
# 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(map Slic3r::Surface->new
|
||
(expolygon => $_, surface_type => S_TYPE_INTERNAL), @$internal);
|
||
|
||
# assign new internal-solid surfaces to layer
|
||
$neighbor_fill_surfaces->append(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) || ($_->surface_type == S_TYPE_BOTTOM) } @neighbor_fill_surfaces)->group}) {
|
||
my $solid_surfaces = diff_ex(
|
||
[ map $_->p, @$s ],
|
||
[ map @$_, @$internal_solid, @$internal ],
|
||
1,
|
||
);
|
||
$neighbor_fill_surfaces->append(map $s->[0]->clone(expolygon => $_), @$solid_surfaces);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
# combine fill surfaces across layers
|
||
sub combine_infill {
|
||
my $self = shift;
|
||
|
||
return unless defined first { $_->config->infill_every_layers > 1 && $_->config->fill_density > 0 } @{$self->print->regions};
|
||
|
||
my @layer_heights = map $_->height, @{$self->layers};
|
||
|
||
for my $region_id (0 .. ($self->print->regions_count-1)) {
|
||
my $region = $self->print->regions->[$region_id];
|
||
my $every = $region->config->infill_every_layers;
|
||
|
||
# limit the number of combined layers to the maximum height allowed by this regions' nozzle
|
||
my $nozzle_diameter = $self->print->config->get_at('nozzle_diameter', $region->config->infill_extruder-1);
|
||
|
||
# define the combinations
|
||
my @combine = (); # layer_id => thickness in layers
|
||
{
|
||
my $current_height = my $layers = 0;
|
||
for my $layer_id (1 .. $#layer_heights) {
|
||
my $height = $self->layers->[$layer_id]->height;
|
||
|
||
if ($current_height + $height >= $nozzle_diameter || $layers >= $every) {
|
||
$combine[$layer_id-1] = $layers;
|
||
$current_height = $layers = 0;
|
||
}
|
||
|
||
$current_height += $height;
|
||
$layers++;
|
||
}
|
||
}
|
||
|
||
# skip bottom layer
|
||
for my $layer_id (1 .. $#combine) {
|
||
next unless ($combine[$layer_id] // 1) > 1;
|
||
my @layerms = map $self->layers->[$_]->regions->[$region_id],
|
||
($layer_id - ($combine[$layer_id]-1) .. $layer_id);
|
||
|
||
# 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'),
|
||
$layer_id-($every-1), $layer_id;
|
||
|
||
# $intersection now contains the regions that can be combined across the full amount of layers
|
||
# so let's remove those areas from all layers
|
||
|
||
my @intersection_with_clearance = map @{$_->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|honeycomb)/)
|
||
? $layerms[-1]->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width * &Slic3r::INFILL_OVERLAP_OVER_SPACING
|
||
: 0)
|
||
)}, @$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->id == $layer_id) {
|
||
push @new_this_type,
|
||
map Slic3r::Surface->new(
|
||
expolygon => $_,
|
||
surface_type => $type,
|
||
thickness => sum(map $_->height, @layerms),
|
||
thickness_layers => scalar(@layerms),
|
||
),
|
||
@$intersection;
|
||
} else {
|
||
# save void surfaces
|
||
push @this_type,
|
||
map Slic3r::Surface->new(expolygon => $_, surface_type => S_TYPE_INTERNALVOID),
|
||
@{intersection_ex(
|
||
[ map @{$_->expolygon}, @this_type ],
|
||
[ @intersection_with_clearance ],
|
||
)};
|
||
}
|
||
|
||
$layerm->fill_surfaces->clear;
|
||
$layerm->fill_surfaces->append(@new_this_type, @other_types);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
sub generate_support_material {
|
||
my $self = shift;
|
||
return unless ($self->config->support_material || $self->config->raft_layers > 0)
|
||
&& scalar(@{$self->layers}) >= 2;
|
||
|
||
my $first_layer_flow = Slic3r::Flow->new_from_width(
|
||
width => ($self->config->first_layer_extrusion_width || $self->config->support_material_extrusion_width),
|
||
role => FLOW_ROLE_SUPPORT_MATERIAL,
|
||
nozzle_diameter => $self->print->config->nozzle_diameter->[ $self->config->support_material_extruder-1 ]
|
||
// $self->print->config->nozzle_diameter->[0],
|
||
layer_height => $self->config->get_abs_value('first_layer_height'),
|
||
bridge_flow_ratio => 0,
|
||
);
|
||
|
||
my $s = Slic3r::Print::SupportMaterial->new(
|
||
print_config => $self->print->config,
|
||
object_config => $self->config,
|
||
first_layer_flow => $first_layer_flow,
|
||
flow => $self->support_material_flow,
|
||
interface_flow => $self->support_material_flow(FLOW_ROLE_SUPPORT_MATERIAL_INTERFACE),
|
||
);
|
||
$s->generate($self);
|
||
}
|
||
|
||
sub _simplify_slices {
|
||
my ($self, $distance) = @_;
|
||
|
||
foreach my $layer (@{$self->layers}) {
|
||
$layer->slices->simplify($distance);
|
||
$_->slices->simplify($distance) for @{$layer->regions};
|
||
}
|
||
}
|
||
|
||
sub support_material_flow {
|
||
my ($self, $role) = @_;
|
||
|
||
$role //= FLOW_ROLE_SUPPORT_MATERIAL;
|
||
my $extruder = ($role == FLOW_ROLE_SUPPORT_MATERIAL)
|
||
? $self->config->support_material_extruder
|
||
: $self->config->support_material_interface_extruder;
|
||
|
||
# we use a bogus layer_height because we use the same flow for all
|
||
# support material layers
|
||
return Slic3r::Flow->new_from_width(
|
||
width => $self->config->support_material_extrusion_width,
|
||
role => $role,
|
||
nozzle_diameter => $self->print->config->nozzle_diameter->[$extruder-1] // $self->print->config->nozzle_diameter->[0],
|
||
layer_height => $self->config->layer_height,
|
||
bridge_flow_ratio => 0,
|
||
);
|
||
}
|
||
|
||
1;
|