112 lines
4.4 KiB
Perl
112 lines
4.4 KiB
Perl
package Slic3r::Fill::Rectilinear;
|
|
use Moo;
|
|
|
|
extends 'Slic3r::Fill::Base';
|
|
|
|
has 'cache' => (is => 'rw', default => sub {{}});
|
|
|
|
use Slic3r::Geometry qw(A B X Y scale unscale scaled_epsilon);
|
|
|
|
sub fill_surface {
|
|
my $self = shift;
|
|
my ($surface, %params) = @_;
|
|
|
|
# rotate polygons so that we can work with vertical lines here
|
|
my $expolygon = $surface->expolygon->clone;
|
|
my $rotate_vector = $self->infill_direction($surface);
|
|
$self->rotate_points($expolygon, $rotate_vector);
|
|
|
|
my ($expolygon_off) = $expolygon->offset_ex(scale $params{flow_spacing}/2);
|
|
return {} if !defined $expolygon_off; # skip some very small polygons (which shouldn't arrive here)
|
|
|
|
my $flow_spacing = $params{flow_spacing};
|
|
my $min_spacing = scale $params{flow_spacing};
|
|
my $distance_between_lines = $min_spacing / $params{density};
|
|
my $line_oscillation = $distance_between_lines - $min_spacing;
|
|
my $is_line_pattern = $self->isa('Slic3r::Fill::Line');
|
|
|
|
my $cache_id = sprintf "d%s_s%.2f_a%.2f",
|
|
$params{density}, $params{flow_spacing}, $rotate_vector->[0][0];
|
|
|
|
if (!$self->cache->{$cache_id}) {
|
|
# compute bounding box
|
|
my $bounding_box;
|
|
{
|
|
my $bb_polygon = $self->bounding_box->polygon;
|
|
$bb_polygon->scale(sqrt 2);
|
|
$self->rotate_points($bb_polygon, $rotate_vector);
|
|
$bounding_box = $bb_polygon->bounding_box;
|
|
}
|
|
|
|
# define flow spacing according to requested density
|
|
if ($params{density} == 1 && !$params{dont_adjust}) {
|
|
$distance_between_lines = $self->adjust_solid_spacing(
|
|
width => $bounding_box->size->[X],
|
|
distance => $distance_between_lines,
|
|
);
|
|
$flow_spacing = unscale $distance_between_lines;
|
|
}
|
|
|
|
# generate the basic pattern
|
|
my $x = $bounding_box->x_min;
|
|
my @vertical_lines = ();
|
|
for (my $i = 0; $x <= $bounding_box->x_max + scaled_epsilon; $i++) {
|
|
my $vertical_line = Slic3r::Line->new([$x, $bounding_box->y_max], [$x, $bounding_box->y_min]);
|
|
if ($is_line_pattern && $i % 2) {
|
|
$vertical_line->[A][X] += $line_oscillation;
|
|
$vertical_line->[B][X] -= $line_oscillation;
|
|
}
|
|
push @vertical_lines, $vertical_line;
|
|
$x += $distance_between_lines;
|
|
}
|
|
|
|
$self->cache->{$cache_id} = [@vertical_lines];
|
|
}
|
|
|
|
# clip paths against a slightly offsetted expolygon, so that the first and last paths
|
|
# are kept even if the expolygon has vertical sides
|
|
my @paths = @{ Boost::Geometry::Utils::polygon_multi_linestring_intersection(
|
|
+($expolygon->offset_ex(scaled_epsilon))[0]->arrayref_pp, # TODO: we should use all the resulting expolygons and clip the linestrings to a multipolygon object
|
|
[ @{ $self->cache->{$cache_id} } ],
|
|
) };
|
|
|
|
# connect lines
|
|
unless ($params{dont_connect}) {
|
|
my $collection = Slic3r::Polyline::Collection->new(
|
|
polylines => [ map Slic3r::Polyline->new(@$_), @paths ],
|
|
);
|
|
@paths = ();
|
|
|
|
my $tolerance = 10 * scaled_epsilon;
|
|
my $diagonal_distance = $distance_between_lines * 2;
|
|
my $can_connect = $is_line_pattern
|
|
? sub {
|
|
($_[X] >= ($distance_between_lines - $line_oscillation) - $tolerance) && ($_[X] <= ($distance_between_lines + $line_oscillation) + $tolerance)
|
|
&& $_[Y] <= $diagonal_distance
|
|
}
|
|
: sub { $_[X] <= $diagonal_distance && $_[Y] <= $diagonal_distance };
|
|
|
|
foreach my $path ($collection->chained_path) {
|
|
if (@paths) {
|
|
my @distance = map abs($path->[0][$_] - $paths[-1][-1][$_]), (X,Y);
|
|
|
|
# TODO: we should also check that both points are on a fill_boundary to avoid
|
|
# connecting paths on the boundaries of internal regions
|
|
if ($can_connect->(@distance)
|
|
&& $expolygon_off->encloses_line(Slic3r::Line->new($paths[-1][-1], $path->[0]), $tolerance)) {
|
|
push @{$paths[-1]}, @$path;
|
|
next;
|
|
}
|
|
}
|
|
push @paths, $path;
|
|
}
|
|
}
|
|
|
|
# paths must be rotated back
|
|
$self->rotate_points_back(\@paths, $rotate_vector);
|
|
|
|
return { flow_spacing => $flow_spacing }, @paths;
|
|
}
|
|
|
|
1;
|