308 lines
10 KiB
Perl
308 lines
10 KiB
Perl
package Slic3r::Layer;
|
|
use Moo;
|
|
|
|
use Math::Clipper ':all';
|
|
use Math::Geometry::Planar;
|
|
use XXX;
|
|
|
|
# a sequential number of layer, starting at 0
|
|
has 'id' => (
|
|
is => 'ro',
|
|
#isa => 'Int',
|
|
required => 1,
|
|
);
|
|
|
|
# collection of spare segments generated by slicing the original geometry;
|
|
# these need to be merged in continuos (closed) polylines
|
|
has 'lines' => (
|
|
is => 'rw',
|
|
#isa => 'ArrayRef[Slic3r::Line]',
|
|
default => sub { [] },
|
|
);
|
|
|
|
# collection of surfaces generated by slicing the original geometry
|
|
has 'surfaces' => (
|
|
is => 'rw',
|
|
#isa => 'ArrayRef[Slic3r::Surface]',
|
|
default => sub { [] },
|
|
);
|
|
|
|
# ordered collection of extrusion paths to build all perimeters
|
|
has 'perimeters' => (
|
|
is => 'rw',
|
|
#isa => 'ArrayRef[Slic3r::ExtrusionPath]',
|
|
default => sub { [] },
|
|
);
|
|
|
|
# ordered collection of extrusion paths to build skirt loops
|
|
has 'skirts' => (
|
|
is => 'rw',
|
|
#isa => 'ArrayRef[Slic3r::ExtrusionPath]',
|
|
default => sub { [] },
|
|
);
|
|
|
|
# collection of surfaces generated by offsetting the innermost perimeter(s)
|
|
# they represent boundaries of areas to fill
|
|
has 'fill_surfaces' => (
|
|
is => 'rw',
|
|
#isa => 'ArrayRef[Slic3r::Surface]',
|
|
default => sub { [] },
|
|
);
|
|
|
|
# ordered collection of extrusion paths to fill surfaces
|
|
has 'fills' => (
|
|
is => 'rw',
|
|
#isa => 'ArrayRef[Slic3r::ExtrusionPath]',
|
|
default => sub { [] },
|
|
);
|
|
|
|
sub z {
|
|
my $self = shift;
|
|
return $self->id * $Slic3r::layer_height / $Slic3r::resolution;
|
|
}
|
|
|
|
sub add_surface {
|
|
my $self = shift;
|
|
my (@vertices) = @_;
|
|
|
|
# convert arrayref points to Point objects
|
|
@vertices = map Slic3r::Point->cast($_), @vertices;
|
|
|
|
my $surface = Slic3r::Surface->new(
|
|
contour => Slic3r::Polyline::Closed->new(points => \@vertices),
|
|
);
|
|
push @{ $self->surfaces }, $surface;
|
|
|
|
# make sure our contour has its points in counter-clockwise order
|
|
$surface->contour->make_counter_clockwise;
|
|
|
|
return $surface;
|
|
}
|
|
|
|
sub add_line {
|
|
my $self = shift;
|
|
my ($a, $b) = @_;
|
|
|
|
# we accept either a Line object or a couple of points
|
|
my $line = Slic3r::Line->cast([ $a, $b ]);
|
|
|
|
push @{ $self->lines }, $line;
|
|
return $line;
|
|
}
|
|
|
|
sub remove_line {
|
|
my $self = shift;
|
|
my ($line) = @_;
|
|
@{ $self->lines } = grep $_ ne $line, @{ $self->lines };
|
|
}
|
|
|
|
sub remove_surface {
|
|
my $self = shift;
|
|
my ($surface) = @_;
|
|
@{ $self->surfaces } = grep $_ ne $surface, @{ $self->surfaces };
|
|
}
|
|
|
|
# build polylines of lines which do not already belong to a surface
|
|
sub make_polylines {
|
|
my $self = shift;
|
|
|
|
# make a cache of line endpoints
|
|
my %pointmap = ();
|
|
foreach my $line (@{ $self->lines }) {
|
|
for my $point (@{ $line->points }) {
|
|
$pointmap{$point->id} ||= [];
|
|
push @{ $pointmap{$point->id} }, $line;
|
|
}
|
|
}
|
|
|
|
# defensive programming
|
|
die "No point should be endpoint of less or more than 2 lines!"
|
|
if grep @$_ != 2, values %pointmap;
|
|
|
|
# make a subroutine to remove lines from pointmap
|
|
my $remove_line = sub {
|
|
my $line = shift;
|
|
foreach my $lines ($pointmap{$line->a->id}, $pointmap{$line->b->id}) {
|
|
@$lines = grep $_ ne $line, @$lines;
|
|
}
|
|
};
|
|
|
|
my $polylines = [];
|
|
|
|
# loop while we have spare lines
|
|
while (my ($first_line) = map @$_, values %pointmap) {
|
|
# add first line to a new polyline
|
|
my $points = [ $first_line->a, $first_line->b ];
|
|
$remove_line->($first_line);
|
|
my $last_point = $first_line->b;
|
|
|
|
# loop through connected lines until we return to the first point
|
|
while (my $next_line = $pointmap{$last_point->id}->[0]) {
|
|
|
|
# get next point
|
|
($last_point) = grep $_->id ne $last_point->id, @{$next_line->points};
|
|
|
|
# add point to polyline
|
|
push @$points, $last_point;
|
|
$remove_line->($next_line);
|
|
}
|
|
|
|
# remove last point as it coincides with first one
|
|
pop @$points;
|
|
|
|
die "Invalid polyline with only 2 points\n" if @$points == 2;
|
|
|
|
Slic3r::debugf "Discovered polyline of %d points (%s)\n", scalar @$points,
|
|
join ' - ', map $_->id, @$points;
|
|
push @$polylines, Slic3r::Polyline::Closed->new(points => $points);
|
|
|
|
# actually this is not needed, as Math::Clipper used in make_surfaces() also cleans contours
|
|
$polylines->[-1]->merge_continuous_lines;
|
|
}
|
|
|
|
return $polylines;
|
|
}
|
|
|
|
sub make_surfaces {
|
|
my $self = shift;
|
|
my ($polylines) = @_;
|
|
|
|
# count how many other polylines enclose each polyline
|
|
# even = contour; odd = hole
|
|
my %enclosing_polylines = ();
|
|
my %enclosing_polylines_count = ();
|
|
my $max_depth = 0;
|
|
foreach my $polyline (@$polylines) {
|
|
# a polyline encloses another one if any point of it is enclosed
|
|
# in the other
|
|
my $point = $polyline->points->[0];
|
|
my $ordered_id = $polyline->id;
|
|
|
|
$enclosing_polylines{$polyline} =
|
|
[ grep $_->id ne $ordered_id && $_->encloses_point($point), @$polylines ];
|
|
$enclosing_polylines_count{$polyline} = scalar @{ $enclosing_polylines{$polyline} };
|
|
|
|
$max_depth = $enclosing_polylines_count{$polyline}
|
|
if $enclosing_polylines_count{$polyline} > $max_depth;
|
|
}
|
|
|
|
# make a cache for contours and surfaces
|
|
my %surfaces = (); # contour => surface
|
|
|
|
# start looking at most inner polylines
|
|
for (; $max_depth > -1; $max_depth--) {
|
|
foreach my $polyline (@$polylines) {
|
|
next unless $enclosing_polylines_count{$polyline} == $max_depth;
|
|
|
|
my $surface;
|
|
if ($enclosing_polylines_count{$polyline} % 2 == 0) {
|
|
# this is a contour
|
|
$polyline->make_counter_clockwise;
|
|
$surface = Slic3r::Surface->new(contour => $polyline);
|
|
} else {
|
|
# this is a hole
|
|
$polyline->make_clockwise;
|
|
|
|
# find the enclosing polyline having immediately close depth
|
|
my ($contour) = grep $enclosing_polylines_count{$_} == ($max_depth-1),
|
|
@{ $enclosing_polylines{$polyline} };
|
|
|
|
if ($surfaces{$contour}) {
|
|
$surface = $surfaces{$contour};
|
|
$surface->add_hole($polyline);
|
|
} else {
|
|
$surface = Slic3r::Surface->new(
|
|
contour => $contour,
|
|
holes => [$polyline],
|
|
);
|
|
$surfaces{$contour} = $surface;
|
|
}
|
|
}
|
|
|
|
# check whether we already have this surface
|
|
next if grep $_->id eq $surface->id, @{ $self->surfaces };
|
|
|
|
$surface->surface_type('internal');
|
|
push @{ $self->surfaces }, $surface;
|
|
|
|
Slic3r::debugf "New surface: %s (%d holes: %s)\n",
|
|
$surface->id, scalar @{$surface->holes},
|
|
join(', ', map $_->id, @{$surface->holes}) || 'none'
|
|
if $Slic3r::debug;
|
|
}
|
|
}
|
|
}
|
|
|
|
sub merge_contiguous_surfaces {
|
|
my $self = shift;
|
|
|
|
if ($Slic3r::debug) {
|
|
Slic3r::debugf "Initial surfaces (%d):\n", scalar @{ $self->surfaces };
|
|
Slic3r::debugf " [%s] %s (%s with %d holes)\n", $_->surface_type, $_->id,
|
|
($_->contour->is_counter_clockwise ? 'ccw' : 'cw'), scalar @{$_->holes} for @{ $self->surfaces };
|
|
#Slic3r::SVG::output_polygons($main::print, "polygons-before.svg", [ map $_->contour->p, @{$self->surfaces} ]);
|
|
}
|
|
|
|
my %resulting_surfaces = ();
|
|
|
|
# only merge surfaces with same type
|
|
foreach my $type (qw(bottom top internal)) {
|
|
my $clipper = Math::Clipper->new;
|
|
my @surfaces = grep $_->surface_type eq $type, @{$self->surfaces}
|
|
or next;
|
|
|
|
#Slic3r::SVG::output_polygons($main::print, "polygons-$type-before.svg", [ map $_->contour->p, @surfaces ]);
|
|
$clipper->add_subject_polygons([ map $_->contour->p, @surfaces ]);
|
|
|
|
my $result = $clipper->ex_execute(CT_UNION, PFT_NONZERO, PFT_NONZERO);
|
|
$clipper->clear;
|
|
|
|
my @extra_holes = map @{$_->{holes}}, @$result;
|
|
$result = [ map $_->{outer}, @$result ];
|
|
#Slic3r::SVG::output_polygons($main::print, "polygons-$type-union.svg", $result);
|
|
|
|
# subtract bottom or top surfaces from internal
|
|
if ($type eq 'internal') {
|
|
$clipper->add_subject_polygons($result);
|
|
$clipper->add_clip_polygons([ map $_->{outer}, @{$resulting_surfaces{$_}} ])
|
|
for qw(bottom top);
|
|
$result = $clipper->execute(CT_DIFFERENCE, PFT_NONZERO, PFT_NONZERO);
|
|
$clipper->clear;
|
|
}
|
|
|
|
# apply holes
|
|
$clipper->add_subject_polygons($result);
|
|
$result = $clipper->execute(CT_DIFFERENCE, PFT_NONZERO, PFT_NONZERO);
|
|
$clipper->clear;
|
|
|
|
$clipper->add_subject_polygons($result);
|
|
$clipper->add_clip_polygons([ @extra_holes ]) if @extra_holes;
|
|
$clipper->add_clip_polygons([ map $_->p, map @{$_->holes}, @surfaces ]);
|
|
my $result2 = $clipper->ex_execute(CT_DIFFERENCE, PFT_NONZERO, PFT_NONZERO);
|
|
|
|
$resulting_surfaces{$type} = $result2;
|
|
}
|
|
|
|
# save surfaces
|
|
@{ $self->surfaces } = ();
|
|
foreach my $type (keys %resulting_surfaces) {
|
|
foreach my $p (@{ $resulting_surfaces{$type} }) {
|
|
push @{ $self->surfaces }, Slic3r::Surface->new(
|
|
surface_type => $type,
|
|
contour => Slic3r::Polyline::Closed->cast($p->{outer}),
|
|
holes => [
|
|
map Slic3r::Polyline::Closed->cast($_), @{$p->{holes}}
|
|
],
|
|
);
|
|
}
|
|
}
|
|
|
|
if ($Slic3r::debug) {
|
|
Slic3r::debugf "Final surfaces (%d):\n", scalar @{ $self->surfaces };
|
|
Slic3r::debugf " [%s] %s (%s with %d holes)\n", $_->surface_type, $_->id,
|
|
($_->contour->is_counter_clockwise ? 'ccw' : 'cw'), scalar @{$_->holes} for @{ $self->surfaces };
|
|
}
|
|
}
|
|
|
|
1;
|