3DPrinting/PrusaSlicer-NonPlainar
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Refactor shortest_path

Browse source
This commit is contained in:
Alessandro Ranellucci 2012-10-30 13:59:33 +01:00
parent 4c6fe0b3d4
commit 37637c34f5
2 changed files with 39 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
lib/Slic3r/ExtrusionPath/Collection.pm
View file

@ -12,26 +12,11 @@ sub shortest_path {
my $self = shift; my $self = shift;
my ($start_near) = @_; my ($start_near) = @_;
my @my_paths = map $_->unpack, @{$self->paths}; my $collection = Slic3r::Polyline::Collection->new(
polylines => [ map $_->unpack->polyline, @{$self->paths} ],
);
my @paths = (); return $collection->shortest_path($start_near, $self->paths);
my $start_at;
my $endpoints = [ map $_->endpoints, @my_paths ];
while (@my_paths) {
# find nearest point
my $start_index = $start_near
? Slic3r::Geometry::nearest_point_index($start_near, $endpoints)
: 0;
my $path_index = int($start_index/2);
if ($start_index%2) { # index is end so reverse to make it the start
$my_paths[$path_index]->reverse;
}
push @paths, splice @my_paths, $path_index, 1;
splice @$endpoints, $path_index*2, 2;
$start_near = $paths[-1]->points->[-1];
}
return @paths;
} }
sub cleanup { sub cleanup {

35
lib/Slic3r/Polyline.pm
View file

@ -181,4 +181,39 @@ sub scale {
return $self; return $self;
} }
package Slic3r::Polyline::Collection;
use Moo;
has 'polylines' => (is => 'ro', default => sub { [] });
# if the second argument is provided, this method will return its items sorted
# instead of returning the actual sorted polylines
sub shortest_path {
my $self = shift;
my ($start_near, $items) = @_;
$items ||= $self->polylines;
my %items_map = map { $self->polylines->[$_] => $items->[$_] } 0 .. $#{$self->polylines};
my @my_paths = @{$self->polylines};
my @paths = ();
my $start_at;
my $endpoints = [ map { $_->[0], $_->[-1] } @my_paths ];
while (@my_paths) {
# find nearest point
my $start_index = $start_near
? Slic3r::Geometry::nearest_point_index($start_near, $endpoints)
: 0;
my $path_index = int($start_index/2);
if ($start_index%2) { # index is end so reverse to make it the start
$my_paths[$path_index]->reverse;
}
push @paths, splice @my_paths, $path_index, 1;
splice @$endpoints, $path_index*2, 2;
$start_near = $paths[-1][-1];
}
return map $items_map{"$_"}, @paths;
}
1; 1;