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package Slic3r::Fill;
use Moo;
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Fill::3DHoneycomb;
use Slic3r::Fill::Base;
use Slic3r::Fill::Concentric;
use Slic3r::Fill::Honeycomb;
use Slic3r::Fill::PlanePath;
use Slic3r::Fill::Rectilinear;
use Slic3r::Flow ':roles';
use Slic3r::Geometry qw(X Y PI scale chained_path deg2rad);
use Slic3r::Geometry::Clipper qw(union union_ex diff diff_ex intersection_ex offset offset2);
use Slic3r::Surface ':types';
has 'bounding_box' => (is => 'ro', required => 0);
has 'fillers' => (is => 'rw', default => sub { {} });
our %FillTypes = (
archimedeanchords => 'Slic3r::Fill::ArchimedeanChords',
rectilinear => 'Slic3r::Fill::Rectilinear',
flowsnake => 'Slic3r::Fill::Flowsnake',
octagramspiral => 'Slic3r::Fill::OctagramSpiral',
hilbertcurve => 'Slic3r::Fill::HilbertCurve',
line => 'Slic3r::Fill::Line',
concentric => 'Slic3r::Fill::Concentric',
honeycomb => 'Slic3r::Fill::Honeycomb',
'3dhoneycomb' => 'Slic3r::Fill::3DHoneycomb',
);
sub filler {
my $self = shift;
my ($filler) = @_;
if (!ref $self) {
return $FillTypes{$filler}->new;
}
$self->fillers->{$filler} ||= $FillTypes{$filler}->new(
bounding_box => $self->bounding_box,
);
return $self->fillers->{$filler};
}
sub make_fill {
my $self = shift;
my ($layerm) = @_;
Slic3r::debugf "Filling layer %d:\n", $layerm->id;
my $fill_density = $layerm->config->fill_density;
my $infill_flow = $layerm->flow(FLOW_ROLE_INFILL);
my $solid_infill_flow = $layerm->flow(FLOW_ROLE_SOLID_INFILL);
my @surfaces = ();
# merge adjacent surfaces
# in case of bridge surfaces, the ones with defined angle will be attached to the ones
# without any angle (shouldn't this logic be moved to process_external_surfaces()?)
{
my @surfaces_with_bridge_angle = grep { $_->bridge_angle >= 0 } @{$layerm->fill_surfaces};
# group surfaces by distinct properties
my @groups = @{$layerm->fill_surfaces->group};
# merge compatible groups (we can generate continuous infill for them)
{
# cache flow widths and patterns used for all solid groups
# (we'll use them for comparing compatible groups)
my @is_solid = my @fw = my @pattern = ();
for (my $i = 0; $i <= $#groups; $i++) {
# we can only merge solid non-bridge surfaces, so discard
# non-solid surfaces
if ($groups[$i][0]->is_solid && (!$groups[$i][0]->is_bridge || $layerm->id == 0)) {
$is_solid[$i] = 1;
$fw[$i] = ($groups[$i][0]->surface_type == S_TYPE_TOP)
? $layerm->flow(FLOW_ROLE_TOP_SOLID_INFILL)->width
: $solid_infill_flow->width;
$pattern[$i] = $groups[$i][0]->is_external
? $layerm->config->external_fill_pattern
: 'rectilinear';
} else {
$is_solid[$i] = 0;
$fw[$i] = 0;
$pattern[$i] = 'none';
}
}
# loop through solid groups
for (my $i = 0; $i <= $#groups; $i++) {
next if !$is_solid[$i];
# find compatible groups and append them to this one
for (my $j = $i+1; $j <= $#groups; $j++) {
next if !$is_solid[$j];
if ($fw[$i] == $fw[$j] && $pattern[$i] eq $pattern[$j]) {
# groups are compatible, merge them
push @{$groups[$i]}, @{$groups[$j]};
splice @groups, $j, 1;
splice @is_solid, $j, 1;
splice @fw, $j, 1;
splice @pattern, $j, 1;
}
}
}
}
# give priority to bridges
@groups = sort { ($a->[0]->bridge_angle >= 0) ? -1 : 0 } @groups;
foreach my $group (@groups) {
my $union_p = union([ map $_->p, @$group ], 1);
# subtract surfaces having a defined bridge_angle from any other
if (@surfaces_with_bridge_angle && $group->[0]->bridge_angle < 0) {
$union_p = diff(
$union_p,
[ map $_->p, @surfaces_with_bridge_angle ],
1,
);
}
# subtract any other surface already processed
my $union = diff_ex(
$union_p,
[ map $_->p, @surfaces ],
1,
);
push @surfaces, map $group->[0]->clone(expolygon => $_), @$union;
}
}
# we need to detect any narrow surfaces that might collapse
# when adding spacing below
# such narrow surfaces are often generated in sloping walls
# by bridge_over_infill() and combine_infill() as a result of the
# subtraction of the combinable area from the layer infill area,
# which leaves small areas near the perimeters
# we are going to grow such regions by overlapping them with the void (if any)
# TODO: detect and investigate whether there could be narrow regions without
# any void neighbors
my $distance_between_surfaces = $infill_flow->scaled_spacing * &Slic3r::INFILL_OVERLAP_OVER_SPACING;
{
my $collapsed = diff(
[ map @{$_->expolygon}, @surfaces ],
offset2([ map @{$_->expolygon}, @surfaces ], -$distance_between_surfaces/2, +$distance_between_surfaces/2),
1,
);
push @surfaces, map Slic3r::Surface->new(
expolygon => $_,
surface_type => S_TYPE_INTERNALSOLID,
), @{intersection_ex(
offset($collapsed, $distance_between_surfaces),
[
(map @{$_->expolygon}, grep $_->surface_type == S_TYPE_INTERNALVOID, @surfaces),
(@$collapsed),
],
1,
)};
}
# add spacing between surfaces
@surfaces = map @{$_->offset(-$distance_between_surfaces / 2)}, @surfaces;
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output("fill_" . $layerm->print_z . ".svg",
expolygons => [ map $_->expolygon, grep !$_->is_solid, @surfaces ],
red_expolygons => [ map $_->expolygon, grep $_->is_solid, @surfaces ],
);
}
my @fills = ();
SURFACE: foreach my $surface (@surfaces) {
next if $surface->surface_type == S_TYPE_INTERNALVOID;
my $filler = $layerm->config->fill_pattern;
my $density = $fill_density;
my $role = ($surface->surface_type == S_TYPE_TOP) ? FLOW_ROLE_TOP_SOLID_INFILL
: $surface->is_solid ? FLOW_ROLE_SOLID_INFILL
: FLOW_ROLE_INFILL;
my $is_bridge = $layerm->id > 0 && $surface->is_bridge;
my $is_solid = $surface->is_solid;
if ($surface->is_solid) {
$density = 100;
$filler = 'rectilinear';
if ($surface->is_external) {
$filler = $layerm->config->external_fill_pattern;
}
} else {
next SURFACE unless $density > 0;
}
# get filler object
my $f = $self->filler($filler);
# calculate the actual flow we'll be using for this infill
my $h = $surface->thickness == -1 ? $layerm->height : $surface->thickness;
my $flow = $layerm->region->flow(
$role,
$h,
$is_bridge || $f->use_bridge_flow,
$layerm->id == 0,
-1,
$layerm->object,
);
# calculate flow spacing for infill pattern generation
my $using_internal_flow = 0;
if (!$is_solid && !$is_bridge) {
# it's internal infill, so we can calculate a generic flow spacing
# for all layers, for avoiding the ugly effect of
# misaligned infill on first layer because of different extrusion width and
# layer height
my $internal_flow = $layerm->region->flow(
FLOW_ROLE_INFILL,
$layerm->object->config->layer_height, # TODO: handle infill_every_layers?
0, # no bridge
0, # no first layer
-1, # auto width
$layerm->object,
);
$f->spacing($internal_flow->spacing);
$using_internal_flow = 1;
} else {
$f->spacing($flow->spacing);
}
$f->layer_id($layerm->id);
$f->z($layerm->print_z);
$f->angle(deg2rad($layerm->config->fill_angle));
$f->loop_clipping(scale($flow->nozzle_diameter) * &Slic3r::LOOP_CLIPPING_LENGTH_OVER_NOZZLE_DIAMETER);
my @polylines = $f->fill_surface(
$surface,
density => $density/100,
layer_height => $h,
);
next unless @polylines;
# calculate actual flow from spacing (which might have been adjusted by the infill
# pattern generator)
if ($using_internal_flow) {
# if we used the internal flow we're not doing a solid infill
# so we can safely ignore the slight variation that might have
# been applied to $f->flow_spacing
} else {
$flow = Slic3r::Flow->new_from_spacing(
spacing => $f->spacing,
nozzle_diameter => $flow->nozzle_diameter,
layer_height => $h,
bridge => $is_bridge || $f->use_bridge_flow,
);
}
my $mm3_per_mm = $flow->mm3_per_mm;
# save into layer
{
my $role = $is_bridge ? EXTR_ROLE_BRIDGE
: $is_solid ? (($surface->surface_type == S_TYPE_TOP) ? EXTR_ROLE_TOPSOLIDFILL : EXTR_ROLE_SOLIDFILL)
: EXTR_ROLE_FILL;
push @fills, my $collection = Slic3r::ExtrusionPath::Collection->new;
$collection->no_sort($f->no_sort);
$collection->append(
map Slic3r::ExtrusionPath->new(
polyline => $_,
role => $role,
mm3_per_mm => $mm3_per_mm,
width => $flow->width,
height => $flow->height,
), @polylines,
);
}
}
# add thin fill regions
foreach my $thin_fill (@{$layerm->thin_fills}) {
push @fills, Slic3r::ExtrusionPath::Collection->new($thin_fill);
}
return @fills;
}
1;
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