400 lines
16 KiB
Perl
400 lines
16 KiB
Perl
package Slic3r::Print::Object;
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use Moo;
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use Slic3r::Geometry qw(scale);
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use Slic3r::Geometry::Clipper qw(diff_ex intersection_ex union_ex);
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has 'x_length' => (is => 'ro', required => 1);
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has 'y_length' => (is => 'ro', required => 1);
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has 'layers' => (
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traits => ['Array'],
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is => 'rw',
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#isa => 'ArrayRef[Slic3r::Layer]',
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default => sub { [] },
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);
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sub layer_count {
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my $self = shift;
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return scalar @{ $self->layers };
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}
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sub layer {
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my $self = shift;
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my ($layer_id) = @_;
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# extend our print by creating all necessary layers
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if ($self->layer_count < $layer_id + 1) {
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for (my $i = $self->layer_count; $i <= $layer_id; $i++) {
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push @{ $self->layers }, Slic3r::Layer->new(id => $i);
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}
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}
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return $self->layers->[$layer_id];
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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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# prepare a reusable subroutine to make surface differences
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my $surface_difference = sub {
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my ($subject_surfaces, $clip_surfaces, $result_type) = @_;
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my $expolygons = diff_ex(
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[ map { ref $_ eq 'ARRAY' ? $_ : ref $_ eq 'Slic3r::ExPolygon' ? @$_ : $_->p } @$subject_surfaces ],
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[ map { ref $_ eq 'ARRAY' ? $_ : ref $_ eq 'Slic3r::ExPolygon' ? @$_ : $_->p } @$clip_surfaces ],
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1,
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);
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return grep $_->contour->is_printable,
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map Slic3r::Surface->new(expolygon => $_, surface_type => $result_type),
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@$expolygons;
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};
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for (my $i = 0; $i < $self->layer_count; $i++) {
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my $layer = $self->layers->[$i];
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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 = $surface_difference->($layer->slices, $upper_layer->slices, 'top');
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} else {
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# if no upper layer, all surfaces of this one are solid
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@top = @{$layer->slices};
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$_->surface_type('top') for @top;
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}
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# find bottom surfaces (difference between current surfaces
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# of current layer and lower one)
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if ($lower_layer) {
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@bottom = $surface_difference->($layer->slices, $lower_layer->slices, 'bottom');
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} else {
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# if no lower layer, all surfaces of this one are solid
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@bottom = @{$layer->slices};
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$_->surface_type('bottom') for @bottom;
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}
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# now, if the object contained a thin membrane, we could have overlapping bottom
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# and top surfaces; let's do an intersection to discover them and consider them
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# as bottom surfaces (to allow for bridge detection)
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if (@top && @bottom) {
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my $overlapping = intersection_ex([ map $_->p, @top ], [ map $_->p, @bottom ]);
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Slic3r::debugf " layer %d contains %d membrane(s)\n", $layer->id, scalar(@$overlapping);
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@top = $surface_difference->([@top], $overlapping, 'top');
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}
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# find internal surfaces (difference between top/bottom surfaces and others)
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@internal = $surface_difference->($layer->slices, [@top, @bottom], 'internal');
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# save surfaces to layer
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@{$layer->slices} = (@bottom, @top, @internal);
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Slic3r::debugf " layer %d has %d bottom, %d top and %d internal surfaces\n",
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$layer->id, scalar(@bottom), scalar(@top), scalar(@internal);
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}
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# clip surfaces to the fill boundaries
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foreach my $layer (@{$self->layers}) {
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@{$layer->surfaces} = ();
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foreach my $surface (@{$layer->slices}) {
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my $intersection = intersection_ex(
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[ $surface->p ],
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[ map @$_, @{$layer->fill_boundaries} ],
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);
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push @{$layer->surfaces}, map Slic3r::Surface->new
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(expolygon => $_, surface_type => $surface->surface_type),
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@$intersection;
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}
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# free memory
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@{$layer->fill_boundaries} = ();
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}
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}
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sub discover_horizontal_shells {
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my $self = shift;
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Slic3r::debugf "==> DISCOVERING HORIZONTAL SHELLS\n";
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for (my $i = 0; $i < $self->layer_count; $i++) {
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my $layer = $self->layers->[$i];
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foreach my $type (qw(top bottom)) {
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# find surfaces of current type for current layer
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# and offset them to take perimeters into account
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my @surfaces = map $_->offset($Slic3r::perimeters * scale $Slic3r::flow_width),
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grep $_->surface_type eq $type, @{$layer->fill_surfaces} or next;
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my $surfaces_p = [ map $_->p, @surfaces ];
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Slic3r::debugf "Layer %d has %d surfaces of type '%s'\n",
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$i, scalar(@surfaces), $type;
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for (my $n = $type eq 'top' ? $i-1 : $i+1;
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abs($n - $i) <= $Slic3r::solid_layers-1;
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$type eq 'top' ? $n-- : $n++) {
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next if $n < 0 || $n >= $self->layer_count;
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Slic3r::debugf " looking for neighbors on layer %d...\n", $n;
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my @neighbor_surfaces = @{$self->layers->[$n]->surfaces};
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my @neighbor_fill_surfaces = @{$self->layers->[$n]->fill_surfaces};
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# find intersection between neighbor and current layer's surfaces
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# intersections have contours and holes
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my $new_internal_solid = intersection_ex(
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$surfaces_p,
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[ map $_->p, grep $_->surface_type =~ /internal/, @neighbor_surfaces ],
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undef, 1,
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);
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next if !@$new_internal_solid;
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# internal-solid are the union of the existing internal-solid surfaces
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# and new ones
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my $internal_solid = union_ex([
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( map $_->p, grep $_->surface_type eq 'internal-solid', @neighbor_fill_surfaces ),
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( map @$_, @$new_internal_solid ),
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]);
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# subtract intersections from layer surfaces to get resulting inner surfaces
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my $internal = diff_ex(
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[ map $_->p, grep $_->surface_type eq 'internal', @neighbor_fill_surfaces ],
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[ map @$_, @$internal_solid ],
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);
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Slic3r::debugf " %d internal-solid and %d internal surfaces found\n",
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scalar(@$internal_solid), scalar(@$internal);
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# Note: due to floating point math we're going to get some very small
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# polygons as $internal; they will be removed by removed_small_features()
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# assign resulting inner surfaces to layer
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my $neighbor_fill_surfaces = $self->layers->[$n]->fill_surfaces;
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@$neighbor_fill_surfaces = ();
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push @$neighbor_fill_surfaces, Slic3r::Surface->new
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(expolygon => $_, surface_type => 'internal')
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for @$internal;
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# assign new internal-solid surfaces to layer
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push @$neighbor_fill_surfaces, Slic3r::Surface->new
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(expolygon => $_, surface_type => 'internal-solid')
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for @$internal_solid;
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# assign top and bottom surfaces to layer
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foreach my $s (Slic3r::Surface->group(grep $_->surface_type =~ /top|bottom/, @neighbor_fill_surfaces)) {
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my $solid_surfaces = diff_ex(
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[ map $_->p, @$s ],
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[ map @$_, @$internal_solid, @$internal ],
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);
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push @$neighbor_fill_surfaces, Slic3r::Surface->new
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(expolygon => $_, surface_type => $s->[0]->surface_type, bridge_angle => $s->[0]->bridge_angle)
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for @$solid_surfaces;
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}
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}
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}
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}
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}
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# combine fill surfaces across layers
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sub infill_every_layers {
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my $self = shift;
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return unless $Slic3r::infill_every_layers > 1 && $Slic3r::fill_density > 0;
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# start from bottom, skip first layer
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for (my $i = 1; $i < $self->layer_count; $i++) {
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my $layer = $self->layer($i);
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# skip layer if no internal fill surfaces
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next if !grep $_->surface_type eq 'internal', @{$layer->fill_surfaces};
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# for each possible depth, look for intersections with the lower layer
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# we do this from the greater depth to the smaller
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for (my $d = $Slic3r::infill_every_layers - 1; $d >= 1; $d--) {
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next if ($i - $d) < 0;
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my $lower_layer = $self->layer($i - 1);
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# select surfaces of the lower layer having the depth we're looking for
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my @lower_surfaces = grep $_->depth_layers == $d && $_->surface_type eq 'internal',
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@{$lower_layer->fill_surfaces};
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next if !@lower_surfaces;
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# calculate intersection between our surfaces and theirs
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my $intersection = intersection_ex(
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[ map $_->p, grep $_->depth_layers <= $d, @lower_surfaces ],
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[ map $_->p, grep $_->surface_type eq 'internal', @{$layer->fill_surfaces} ],
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);
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next if !@$intersection;
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# new fill surfaces of the current layer are:
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# - any non-internal surface
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# - intersections found (with a $d + 1 depth)
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# - any internal surface not belonging to the intersection (with its original depth)
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{
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my @new_surfaces = ();
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push @new_surfaces, grep $_->surface_type ne 'internal', @{$layer->fill_surfaces};
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push @new_surfaces, map Slic3r::Surface->new
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(expolygon => $_, surface_type => 'internal', depth_layers => $d + 1), @$intersection;
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foreach my $depth (reverse $d..$Slic3r::infill_every_layers) {
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push @new_surfaces, map Slic3r::Surface->new
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(expolygon => $_, surface_type => 'internal', depth_layers => $depth),
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# difference between our internal layers with depth == $depth
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# and the intersection found
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@{diff_ex(
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[
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map $_->p, grep $_->surface_type eq 'internal' && $_->depth_layers == $depth,
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@{$layer->fill_surfaces},
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],
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[ map @$_, @$intersection ],
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1,
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)};
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}
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@{$layer->fill_surfaces} = @new_surfaces;
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}
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# now we remove the intersections from lower layer
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{
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my @new_surfaces = ();
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push @new_surfaces, grep $_->surface_type ne 'internal', @{$lower_layer->fill_surfaces};
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foreach my $depth (1..$Slic3r::infill_every_layers) {
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push @new_surfaces, map Slic3r::Surface->new
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(expolygon => $_, surface_type => 'internal', depth_layers => $depth),
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# difference between internal layers with depth == $depth
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# and the intersection found
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@{diff_ex(
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[
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map $_->p, grep $_->surface_type eq 'internal' && $_->depth_layers == $depth,
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@{$lower_layer->fill_surfaces},
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],
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[ map @$_, @$intersection ],
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1,
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)};
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}
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@{$lower_layer->fill_surfaces} = @new_surfaces;
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}
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}
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}
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}
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sub generate_support_material {
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my $self = shift;
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# determine unsupported surfaces
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my %layers = ();
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my @unsupported_expolygons = ();
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{
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my (@a, @b) = ();
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for my $i (reverse 0 .. $#{$self->layers}) {
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my $layer = $self->layers->[$i];
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my @c = ();
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if (@b) {
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@c = @{diff_ex(
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[ map @$_, @b ],
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[ map @$_, map $_->expolygon->offset_ex(scale $Slic3r::flow_width), @{$layer->slices} ],
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)};
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$layers{$i} = [@c];
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}
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@b = @{union_ex([ map @$_, @c, @a ])};
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# get unsupported surfaces for current layer as all bottom slices
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# minus the bridges offsetted to cover their perimeters.
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# actually, we are marking as bridges more than we should be, so
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# better build support material for bridges too rather than ignoring
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# those parts. a visibility check algorithm is needed.
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# @a = @{diff_ex(
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# [ map $_->p, grep $_->surface_type eq 'bottom', @{$layer->slices} ],
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# [ map @$_, map $_->expolygon->offset_ex(scale $Slic3r::flow_spacing * $Slic3r::perimeters),
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# grep $_->surface_type eq 'bottom' && defined $_->bridge_angle,
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# @{$layer->fill_surfaces} ],
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# )};
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@a = map $_->expolygon->clone, grep $_->surface_type eq 'bottom', @{$layer->slices};
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$_->simplify(scale $Slic3r::flow_spacing * 3) for @a;
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push @unsupported_expolygons, @a;
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}
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}
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return if !@unsupported_expolygons;
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# generate paths for the pattern that we're going to use
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my $support_patterns = [];
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{
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my @support_material_areas = map $_->offset_ex(scale 5),
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@{union_ex([ map @$_, @unsupported_expolygons ])};
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my $fill = Slic3r::Fill->new(print => $self);
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foreach my $angle (0, 90) {
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my @patterns = ();
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foreach my $expolygon (@support_material_areas) {
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my @paths = $fill->fillers->{rectilinear}->fill_surface(
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Slic3r::Surface->new(
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expolygon => $expolygon,
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bridge_angle => $Slic3r::fill_angle + 45 + $angle,
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),
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density => 0.20,
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flow_spacing => $Slic3r::flow_spacing,
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);
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my $params = shift @paths;
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push @patterns,
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map Slic3r::ExtrusionPath->new(
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polyline => Slic3r::Polyline->new(@$_),
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role => 'support-material',
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depth_layers => 1,
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flow_spacing => $params->{flow_spacing},
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), @paths;
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}
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push @$support_patterns, [@patterns];
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}
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}
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if (0) {
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require "Slic3r/SVG.pm";
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Slic3r::SVG::output(undef, "support.svg",
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polylines => [ map $_->polyline, map @$_, @$support_patterns ],
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);
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}
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# apply the pattern to layers
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{
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my $clip_pattern = sub {
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my ($layer_id, $expolygons) = @_;
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my @paths = ();
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foreach my $expolygon (@$expolygons) {
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push @paths, map $_->clip_with_expolygon($expolygon),
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map $_->clip_with_polygon($expolygon->bounding_box_polygon),
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@{$support_patterns->[ $layer_id % 2 ]};
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};
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return @paths;
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};
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my %layer_paths = ();
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Slic3r::parallelize(
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items => [ keys %layers ],
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thread_cb => sub {
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my $q = shift;
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my $paths = {};
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while (defined (my $layer_id = $q->dequeue)) {
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$paths->{$layer_id} = [ $clip_pattern->($layer_id, $layers{$layer_id}) ];
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}
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return $paths;
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},
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collect_cb => sub {
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my $paths = shift;
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$layer_paths{$_} = $paths->{$_} for keys %$paths;
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},
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no_threads_cb => sub {
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$layer_paths{$_} = [ $clip_pattern->($_, $layers{$_}) ] for keys %layers;
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},
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);
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foreach my $layer_id (keys %layer_paths) {
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my $layer = $self->layers->[$layer_id];
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$layer->support_fills(Slic3r::ExtrusionPath::Collection->new);
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push @{$layer->support_fills->paths}, @{$layer_paths{$layer_id}};
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}
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}
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}
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1;
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