166 lines
4.0 KiB
Perl
166 lines
4.0 KiB
Perl
package Slic3r::Polygon;
|
|
use strict;
|
|
use warnings;
|
|
|
|
# a polygon is a closed polyline.
|
|
use parent 'Slic3r::Polyline';
|
|
|
|
use Slic3r::Geometry qw(polygon_lines polygon_remove_parallel_continuous_edges
|
|
polygon_remove_acute_vertices polygon_segment_having_point point_in_polygon
|
|
PI X1 X2 Y1 Y2 epsilon);
|
|
use Slic3r::Geometry::Clipper qw(JT_MITER);
|
|
|
|
sub lines {
|
|
my $self = shift;
|
|
return polygon_lines($self);
|
|
}
|
|
|
|
sub wkt {
|
|
my $self = shift;
|
|
return sprintf "POLYGON((%s))", join ',', map "$_->[0] $_->[1]", @$self;
|
|
}
|
|
|
|
sub is_counter_clockwise {
|
|
my $self = shift;
|
|
return Slic3r::Geometry::Clipper::is_counter_clockwise($self);
|
|
}
|
|
|
|
sub make_counter_clockwise {
|
|
my $self = shift;
|
|
if (!$self->is_counter_clockwise) {
|
|
$self->reverse;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
sub make_clockwise {
|
|
my $self = shift;
|
|
if ($self->is_counter_clockwise) {
|
|
$self->reverse;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
sub merge_continuous_lines {
|
|
my $self = shift;
|
|
|
|
polygon_remove_parallel_continuous_edges($self);
|
|
bless $_, 'Slic3r::Point' for @$self;
|
|
}
|
|
|
|
sub remove_acute_vertices {
|
|
my $self = shift;
|
|
polygon_remove_acute_vertices($self);
|
|
bless $_, 'Slic3r::Point' for @$self;
|
|
}
|
|
|
|
sub encloses_point {
|
|
my $self = shift;
|
|
my ($point) = @_;
|
|
return Boost::Geometry::Utils::point_covered_by_polygon($point, [$self]);
|
|
}
|
|
|
|
sub area {
|
|
my $self = shift;
|
|
return Slic3r::Geometry::Clipper::area($self);
|
|
}
|
|
|
|
sub grow {
|
|
my $self = shift;
|
|
return $self->split_at_first_point->grow(@_);
|
|
}
|
|
|
|
sub simplify {
|
|
my $self = shift;
|
|
return Slic3r::Geometry::Clipper::simplify_polygon( $self->SUPER::simplify(@_) );
|
|
}
|
|
|
|
# this method subdivides the polygon segments to that no one of them
|
|
# is longer than the length provided
|
|
sub subdivide {
|
|
my $self = shift;
|
|
my ($max_length) = @_;
|
|
|
|
for (my $i = 0; $i <= $#$self; $i++) {
|
|
my $len = Slic3r::Geometry::line_length([ $self->[$i-1], $self->[$i] ]);
|
|
my $num_points = int($len / $max_length) - 1;
|
|
$num_points++ if $len % $max_length;
|
|
|
|
# $num_points is the number of points to add between $i-1 and $i
|
|
next if $num_points == -1;
|
|
my $spacing = $len / ($num_points + 1);
|
|
my @new_points = map Slic3r::Point->new($_),
|
|
map Slic3r::Geometry::point_along_segment($self->[$i-1], $self->[$i], $spacing * $_),
|
|
1..$num_points;
|
|
|
|
splice @$self, $i, 0, @new_points;
|
|
$i += @new_points;
|
|
}
|
|
}
|
|
|
|
# returns false if the polygon is too tight to be printed
|
|
sub is_printable {
|
|
my $self = shift;
|
|
my ($width) = @_;
|
|
|
|
# try to get an inwards offset
|
|
# for a distance equal to half of the extrusion width;
|
|
# if no offset is possible, then polyline is not printable.
|
|
# we use flow_width here because this has to be consistent
|
|
# with the thin wall detection in Layer->make_surfaces,
|
|
# otherwise we could lose surfaces as that logic wouldn't
|
|
# detect them and we would be discarding them.
|
|
my $p = $self->clone;
|
|
$p->make_counter_clockwise;
|
|
return Slic3r::Geometry::Clipper::offset([$p], -$width / 2) ? 1 : 0;
|
|
}
|
|
|
|
sub is_valid {
|
|
my $self = shift;
|
|
return @$self >= 3;
|
|
}
|
|
|
|
sub split_at_index {
|
|
my $self = shift;
|
|
my ($index) = @_;
|
|
|
|
return Slic3r::Polyline->new(
|
|
@$self[$index .. $#$self],
|
|
@$self[0 .. $index],
|
|
);
|
|
}
|
|
|
|
sub split_at {
|
|
my $self = shift;
|
|
my ($point) = @_;
|
|
|
|
# find index of point
|
|
my $i = -1;
|
|
for (my $n = 0; $n <= $#$self; $n++) {
|
|
if (Slic3r::Geometry::same_point($point, $self->[$n])) {
|
|
$i = $n;
|
|
last;
|
|
}
|
|
}
|
|
die "Point not found" if $i == -1;
|
|
|
|
return $self->split_at_index($i);
|
|
}
|
|
|
|
sub split_at_first_point {
|
|
my $self = shift;
|
|
return $self->split_at_index(0);
|
|
}
|
|
|
|
# for cw polygons this will return convex points!
|
|
sub concave_points {
|
|
my $self = shift;
|
|
|
|
return map $self->[$_],
|
|
grep Slic3r::Geometry::angle3points(@$self[$_, $_-1, $_+1]) < PI - epsilon,
|
|
-1 .. ($#$self-1);
|
|
}
|
|
|
|
1; |