142 lines
3.5 KiB
Perl
142 lines
3.5 KiB
Perl
package Slic3r::Polygon;
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use strict;
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use warnings;
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# a polygon is a closed polyline.
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use parent 'Slic3r::Polyline';
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use Slic3r::Geometry qw(polygon_lines polygon_remove_parallel_continuous_edges
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scale polygon_remove_acute_vertices
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polygon_segment_having_point point_in_polygon move_points rotate_points);
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use Slic3r::Geometry::Clipper qw(JT_MITER);
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# the constructor accepts an array(ref) of points
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sub new {
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my $class = shift;
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my $self;
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if (@_ == 1) {
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$self = [ @{$_[0]} ];
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} else {
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$self = [ @_ ];
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}
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bless $self, $class;
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bless $_, 'Slic3r::Point' for @$self;
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$self;
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}
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sub clone {
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my $self = shift;
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return (ref $self)->new(map $_->clone, @$self);
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}
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sub lines {
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my $self = shift;
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return map Slic3r::Line->new($_), polygon_lines($self);
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}
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sub cleanup {
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my $self = shift;
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$self->merge_continuous_lines;
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}
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sub merge_continuous_lines {
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my $self = shift;
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polygon_remove_parallel_continuous_edges($self);
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bless $_, 'Slic3r::Point' for @$self;
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}
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sub remove_acute_vertices {
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my $self = shift;
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polygon_remove_acute_vertices($self);
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bless $_, 'Slic3r::Point' for @$self;
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}
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sub point_on_segment {
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my $self = shift;
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my ($point) = @_;
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return polygon_segment_having_point($self, $point);
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}
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sub encloses_point {
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my $self = shift;
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my ($point) = @_;
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return point_in_polygon($point, $self);
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}
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sub translate {
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my $self = shift;
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my ($x, $y) = @_;
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@$self = move_points([$x, $y], @$self);
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}
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sub rotate {
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my $self = shift;
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my ($angle, $center) = @_;
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@$self = rotate_points($angle, $center, @$self);
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}
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sub area {
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my $self = shift;
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return Slic3r::Geometry::Clipper::area($self);
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}
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sub safety_offset {
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my $self = shift;
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return (ref $self)->new(Slic3r::Geometry::Clipper::safety_offset([$self])->[0]);
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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, $miterLimit);
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return @$offsets;
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}
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# this method subdivides the polygon segments to that no one of them
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# is longer than the length provided
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sub subdivide {
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my $self = shift;
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my ($max_length) = @_;
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for (my $i = 0; $i <= $#$self; $i++) {
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my $len = Slic3r::Geometry::line_length([ $self->[$i-1], $self->[$i] ]);
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my $num_points = int($len / $max_length) - 1;
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$num_points++ if $len % $max_length;
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next unless $num_points;
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# $num_points is the number of points to add between $i-1 and $i
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my $spacing = $len / ($num_points + 1);
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my @new_points = map Slic3r::Point->new($_),
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map Slic3r::Geometry::point_along_segment($self->[$i-1], $self->[$i], $spacing * $_),
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1..$num_points;
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splice @$self, $i, 0, @new_points;
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$i += @new_points;
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}
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}
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# returns false if the polyline is too tight to be printed
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sub is_printable {
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my $self = shift;
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# try to get an inwards offset
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# for a distance equal to half of the extrusion width;
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# if no offset is possible, then polyline is not printable
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my $p = $self->clone;
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@$p = reverse @$p if !Math::Clipper::is_counter_clockwise($p);
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my $offsets = Math::Clipper::offset([$p], -(scale $Slic3r::flow_spacing / 2), $Slic3r::resolution * 100000, JT_MITER, 2);
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return @$offsets ? 1 : 0;
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}
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sub is_valid {
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my $self = shift;
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return @{$self->points} >= 3;
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}
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1; |