67 lines
1.5 KiB
Perl
67 lines
1.5 KiB
Perl
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package Slic3r::ExPolygon;
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use strict;
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use warnings;
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# an ExPolygon is a polygon with holes
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use Math::Clipper qw(CT_UNION PFT_NONZERO JT_MITER);
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use Slic3r::Geometry::Clipper qw(union_ex);
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# the constructor accepts an array of polygons
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# or a Math::Clipper ExPolygon (hashref)
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sub new {
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my $class = shift;
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my $self;
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if (@_ == 1 && ref $_[0] eq 'HASH') {
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$self = [
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Slic3r::Polygon->new($_[0]{outer}),
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map Slic3r::Polygon->new($_), @{$_[0]{holes}},
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];
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} else {
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$self = [@_];
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}
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bless $self, $class;
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$self;
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}
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# this class method accepts an array of polygons and returns
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# an array of expolygons with the right holes applied to the
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# right contours
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sub make {
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my $class = shift;
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return map $class->new($_), @{ union_ex(\@_) };
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}
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sub contour {
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my $self = shift;
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return $self->[0];
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}
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sub holes {
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my $self = shift;
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return @$self[1..$#$self];
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}
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sub clipper_expolygon {
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my $self = shift;
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return {
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outer => $self->contour,
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holes => [ $self->holes ],
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};
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}
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sub offset {
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my $self = shift;
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my ($distance, $scale, $joinType, $miterLimit) = @_;
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$scale ||= $Slic3r::resolution * 1000000;
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$joinType = JT_MITER if !defined $joinType;
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$miterLimit ||= 2;
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my $offsets = Math::Clipper::offset($self, $distance, $scale, $joinType, $miterLimit);
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# apply holes to the right contours
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return (ref $self)->make(@$offsets);
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}
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1;
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