139 lines
4.8 KiB
Perl
139 lines
4.8 KiB
Perl
package Slic3r::Fill::Rectilinear;
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use Moo;
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extends 'Slic3r::Fill::Base';
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with qw(Slic3r::Fill::WithDirection);
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has '_min_spacing' => (is => 'rw');
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has '_line_spacing' => (is => 'rw');
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has '_diagonal_distance' => (is => 'rw');
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has '_line_oscillation' => (is => 'rw');
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use Slic3r::Geometry qw(scale unscale scaled_epsilon);
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use Slic3r::Geometry::Clipper qw(intersection_pl);
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sub fill_surface {
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my $self = shift;
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my ($surface, %params) = @_;
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# rotate polygons so that we can work with vertical lines here
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my $expolygon = $surface->expolygon->clone;
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my $rotate_vector = $self->infill_direction($surface);
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$self->rotate_points($expolygon, $rotate_vector);
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$self->_min_spacing(scale $self->spacing);
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$self->_line_spacing($self->_min_spacing / $params{density});
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$self->_diagonal_distance($self->_line_spacing * 2);
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$self->_line_oscillation($self->_line_spacing - $self->_min_spacing); # only for Line infill
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my $bounding_box = $expolygon->bounding_box;
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# define flow spacing according to requested density
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if ($params{density} == 1 && !$params{dont_adjust}) {
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$self->_line_spacing($self->adjust_solid_spacing(
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width => $bounding_box->size->x,
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distance => $self->_line_spacing,
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));
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$self->spacing(unscale $self->_line_spacing);
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} else {
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# extend bounding box so that our pattern will be aligned with other layers
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$bounding_box->merge_point(Slic3r::Point->new(
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$bounding_box->x_min - ($bounding_box->x_min % $self->_line_spacing),
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$bounding_box->y_min - ($bounding_box->y_min % $self->_line_spacing),
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));
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}
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# generate the basic pattern
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my $x_max = $bounding_box->x_max + scaled_epsilon;
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my @vertical_lines = ();
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for (my $x = $bounding_box->x_min; $x <= $x_max; $x += $self->_line_spacing) {
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push @vertical_lines, $self->_line($#vertical_lines, $x, $bounding_box->y_min, $bounding_box->y_max);
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}
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# clip paths against a slightly larger expolygon, so that the first and last paths
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# are kept even if the expolygon has vertical sides
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# the minimum offset for preventing edge lines from being clipped is scaled_epsilon;
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# however we use a larger offset to support expolygons with slightly skewed sides and
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# not perfectly straight
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my @polylines = @{intersection_pl(\@vertical_lines, $expolygon->offset(scale 0.02))};
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# connect lines
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unless ($params{dont_connect} || !@polylines) { # prevent calling leftmost_point() on empty collections
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my ($expolygon_off) = @{$expolygon->offset_ex($self->_min_spacing/2)};
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my $collection = Slic3r::Polyline::Collection->new(@polylines);
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@polylines = ();
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foreach my $polyline (@{$collection->chained_path_from($collection->leftmost_point, 0)}) {
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if (@polylines) {
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my $first_point = $polyline->first_point;
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my $last_point = $polylines[-1]->last_point;
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my @distance = map abs($first_point->$_ - $last_point->$_), qw(x y);
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# TODO: we should also check that both points are on a fill_boundary to avoid
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# connecting paths on the boundaries of internal regions
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if ($self->_can_connect(@distance) && $expolygon_off->contains_line(Slic3r::Line->new($last_point, $first_point))) {
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$polylines[-1]->append_polyline($polyline);
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next;
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}
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}
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# make a clone before $collection goes out of scope
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push @polylines, $polyline->clone;
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}
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}
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# paths must be rotated back
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$self->rotate_points_back(\@polylines, $rotate_vector);
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return @polylines;
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}
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sub _line {
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my ($self, $i, $x, $y_min, $y_max) = @_;
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return Slic3r::Polyline->new(
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[$x, $y_min],
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[$x, $y_max],
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);
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}
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sub _can_connect {
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my ($self, $dist_X, $dist_Y) = @_;
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return $dist_X <= $self->_diagonal_distance
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&& $dist_Y <= $self->_diagonal_distance;
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}
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package Slic3r::Fill::Line;
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use Moo;
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extends 'Slic3r::Fill::Rectilinear';
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use Slic3r::Geometry qw(scaled_epsilon);
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sub _line {
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my ($self, $i, $x, $y_min, $y_max) = @_;
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if ($i % 2) {
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return Slic3r::Polyline->new(
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[$x - $self->_line_oscillation, $y_min],
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[$x + $self->_line_oscillation, $y_max],
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);
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} else {
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return Slic3r::Polyline->new(
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[$x, $y_min],
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[$x, $y_max],
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);
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}
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}
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sub _can_connect {
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my ($self, $dist_X, $dist_Y) = @_;
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my $TOLERANCE = 10 * scaled_epsilon;
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return ($dist_X >= ($self->_line_spacing - $self->_line_oscillation) - $TOLERANCE)
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&& ($dist_X <= ($self->_line_spacing + $self->_line_oscillation) + $TOLERANCE)
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&& $dist_Y <= $self->_diagonal_distance;
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}
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1;
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