74 lines
1.9 KiB
Perl
74 lines
1.9 KiB
Perl
package Slic3r::ExtrusionPath;
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use Moo;
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extends 'Slic3r::Polyline';
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# this integer represents the vertical thickness of the extrusion
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# expressed in layers
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has 'depth_layers' => (is => 'ro', default => sub {1});
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use constant PI => 4 * atan2(1, 1);
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sub clip_end {
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my $self = shift;
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my ($distance) = @_;
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while ($distance > 0) {
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my $last_point = pop @{$self->points};
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my $last_segment_length = $last_point->distance_to($self->points->[-1]);
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if ($last_segment_length <= $distance) {
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$distance -= $last_segment_length;
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next;
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}
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my $new_point = Slic3r::Geometry::point_along_segment($last_point, $self->points->[-1], $distance);
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push @{$self->points}, Slic3r::Point->new($new_point);
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$distance = 0;
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}
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}
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sub endpoints {
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my $self = shift;
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return ($self->points->[0], $self->points->[-1]);
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}
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sub reverse {
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my $self = shift;
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@{$self->points} = reverse @{$self->points};
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}
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sub split_at_acute_angles {
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my $self = shift;
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# calculate angle limit
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my $angle_limit = abs(Slic3r::Geometry::deg2rad(40));
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my @points = @{$self->p};
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my @paths = ();
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# take first two points
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my @p = splice @points, 0, 2;
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# loop until we have one spare point
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while (my $p3 = shift @points) {
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my $angle = abs(Slic3r::Geometry::angle3points($p[-1], $p[-2], $p3));
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$angle = 2*PI - $angle if $angle > PI;
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if ($angle < $angle_limit) {
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# if the angle between $p[-2], $p[-1], $p3 is too acute
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# then consider $p3 only as a starting point of a new
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# path and stop the current one as it is
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push @paths, (ref $self)->cast([@p]);
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@p = ($p3);
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push @p, grep $_, shift @points or last;
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} else {
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push @p, $p3;
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}
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}
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push @paths, (ref $self)->cast([@p]) if @p > 1;
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return @paths;
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}
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1;
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