74 lines
2.3 KiB
Perl
74 lines
2.3 KiB
Perl
package Slic3r::Fill::Concentric;
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use Moo;
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extends 'Slic3r::Fill::Base';
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use Slic3r::ExtrusionPath ':roles';
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use Slic3r::Geometry qw(scale unscale X1 Y1 X2 Y2);
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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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# no rotation is supported for this infill pattern
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my $expolygon = $surface->expolygon;
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my $bounding_box = [ $expolygon->bounding_box ];
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my $min_spacing = scale $params{flow_spacing};
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my $distance = $min_spacing / $params{density};
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my $flow_spacing;
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if ($params{density} == 1) {
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$distance = $self->adjust_solid_spacing(
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width => $bounding_box->[X2] - $bounding_box->[X1],
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distance => $distance,
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);
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$flow_spacing = unscale $distance;
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}
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my @contour_loops = ();
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my @hole_loops = ();
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my @last_offsets = ($expolygon->offset_ex($distance));
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while (@last_offsets) {
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my @new_offsets = ();
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foreach my $last_expolygon (@last_offsets) {
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my @offsets = $last_expolygon->offset_ex(-$distance);
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foreach my $offset (@offsets) {
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push @new_offsets, $offset;
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push @contour_loops, $offset->contour;
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push @hole_loops, $offset->holes;
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}
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}
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@last_offsets = @new_offsets;
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}
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my @loops = (@contour_loops, reverse @hole_loops);
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# make paths
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my @paths = ();
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my $cur_pos = Slic3r::Point->new(
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($bounding_box->[X1] + $bounding_box->[X2]) / 2,
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($bounding_box->[Y1] + $bounding_box->[Y2]) / 2,
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);
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foreach my $loop (map Slic3r::ExtrusionLoop->new(polygon => $_, role => EXTR_ROLE_FILL), @loops) {
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# extrude all loops ccw
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$loop->polygon->make_counter_clockwise;
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# find the point of the loop that is closest to the current extruder position
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$cur_pos = $loop->nearest_point_to($cur_pos);
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# split the loop at the starting point and make a path
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my $path = $loop->split_at($cur_pos);
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# clip the path to avoid the extruder to get exactly on the first point of the loop
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$path->clip_end(scale $Slic3r::flow_width * 0.15);
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push @paths, $path->points if @{$path->points};
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}
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return { flow_spacing => $flow_spacing }, @paths;
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}
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1;
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