2011-09-01 19:06:28 +00:00
|
|
|
package Slic3r::Layer;
|
2011-09-06 09:50:43 +00:00
|
|
|
use Moo;
|
2011-09-01 19:06:28 +00:00
|
|
|
|
2011-09-18 17:28:12 +00:00
|
|
|
use Math::Clipper ':all';
|
2011-10-11 13:51:08 +00:00
|
|
|
use Slic3r::Geometry qw(polygon_lines points_coincide angle3points polyline_lines nearest_point
|
2011-11-11 21:01:27 +00:00
|
|
|
line_length collinear X Y A B PI);
|
2011-11-16 13:53:30 +00:00
|
|
|
use Slic3r::Geometry::Clipper qw(safety_offset union_ex PFT_EVENODD);
|
2011-09-01 19:06:28 +00:00
|
|
|
use XXX;
|
|
|
|
|
2011-09-04 10:04:01 +00:00
|
|
|
# a sequential number of layer, starting at 0
|
2011-09-01 19:06:28 +00:00
|
|
|
has 'id' => (
|
|
|
|
is => 'ro',
|
2011-09-06 09:50:43 +00:00
|
|
|
#isa => 'Int',
|
2011-09-01 19:06:28 +00:00
|
|
|
required => 1,
|
|
|
|
);
|
|
|
|
|
2011-09-18 17:28:12 +00:00
|
|
|
# collection of spare segments generated by slicing the original geometry;
|
|
|
|
# these need to be merged in continuos (closed) polylines
|
2011-09-01 19:06:28 +00:00
|
|
|
has 'lines' => (
|
|
|
|
is => 'rw',
|
2011-09-06 09:50:43 +00:00
|
|
|
#isa => 'ArrayRef[Slic3r::Line]',
|
2011-09-01 19:06:28 +00:00
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-09-04 10:04:01 +00:00
|
|
|
# collection of surfaces generated by slicing the original geometry
|
2011-09-01 19:06:28 +00:00
|
|
|
has 'surfaces' => (
|
|
|
|
is => 'rw',
|
2011-09-06 09:50:43 +00:00
|
|
|
#isa => 'ArrayRef[Slic3r::Surface]',
|
2011-09-01 19:06:28 +00:00
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-10-07 17:07:57 +00:00
|
|
|
# collection of surfaces representing bridges
|
|
|
|
has 'bridges' => (
|
|
|
|
is => 'rw',
|
|
|
|
#isa => 'ArrayRef[Slic3r::Surface::Bridge]',
|
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
|
|
|
# collection of surfaces to make perimeters for
|
|
|
|
has 'perimeter_surfaces' => (
|
|
|
|
is => 'rw',
|
|
|
|
#isa => 'ArrayRef[Slic3r::Surface]',
|
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-09-04 10:04:01 +00:00
|
|
|
# ordered collection of extrusion paths to build all perimeters
|
2011-09-02 19:10:20 +00:00
|
|
|
has 'perimeters' => (
|
|
|
|
is => 'rw',
|
2011-10-07 17:07:57 +00:00
|
|
|
#isa => 'ArrayRef[Slic3r::ExtrusionLoop]',
|
2011-09-04 10:04:01 +00:00
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-09-05 18:00:59 +00:00
|
|
|
# ordered collection of extrusion paths to build skirt loops
|
|
|
|
has 'skirts' => (
|
|
|
|
is => 'rw',
|
2011-10-07 17:07:57 +00:00
|
|
|
#isa => 'ArrayRef[Slic3r::ExtrusionLoop]',
|
2011-09-05 18:00:59 +00:00
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-09-04 10:04:01 +00:00
|
|
|
# collection of surfaces generated by offsetting the innermost perimeter(s)
|
2011-10-15 09:36:05 +00:00
|
|
|
# they represent boundaries of areas to fill (grouped by original objects)
|
2011-09-04 10:04:01 +00:00
|
|
|
has 'fill_surfaces' => (
|
|
|
|
is => 'rw',
|
2011-10-15 09:36:05 +00:00
|
|
|
#isa => 'ArrayRef[ArrayRef[Slic3r::Surface]]',
|
2011-09-02 19:10:20 +00:00
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-09-05 10:21:27 +00:00
|
|
|
# ordered collection of extrusion paths to fill surfaces
|
|
|
|
has 'fills' => (
|
|
|
|
is => 'rw',
|
2011-09-06 09:50:43 +00:00
|
|
|
#isa => 'ArrayRef[Slic3r::ExtrusionPath]',
|
2011-09-05 10:21:27 +00:00
|
|
|
default => sub { [] },
|
|
|
|
);
|
|
|
|
|
2011-11-07 15:04:27 +00:00
|
|
|
# Z used for slicing
|
|
|
|
sub slice_z {
|
2011-09-01 19:06:28 +00:00
|
|
|
my $self = shift;
|
2011-11-13 18:08:19 +00:00
|
|
|
if ($self->id == 0) {
|
|
|
|
return ($Slic3r::layer_height * $Slic3r::first_layer_height_ratio) / 2 / $Slic3r::resolution;
|
|
|
|
}
|
|
|
|
return (($Slic3r::layer_height * $Slic3r::first_layer_height_ratio)
|
|
|
|
+ (($self->id-1) * $Slic3r::layer_height)
|
|
|
|
+ ($Slic3r::layer_height/2)) / $Slic3r::resolution;
|
2011-09-01 19:06:28 +00:00
|
|
|
}
|
|
|
|
|
2011-11-07 15:04:27 +00:00
|
|
|
# Z used for printing
|
|
|
|
sub print_z {
|
|
|
|
my $self = shift;
|
2011-11-13 18:08:19 +00:00
|
|
|
return (($Slic3r::layer_height * $Slic3r::first_layer_height_ratio)
|
|
|
|
+ ($self->id * $Slic3r::layer_height)) / $Slic3r::resolution;
|
2011-11-07 15:04:27 +00:00
|
|
|
}
|
|
|
|
|
2011-09-01 19:06:28 +00:00
|
|
|
sub add_surface {
|
|
|
|
my $self = shift;
|
|
|
|
my (@vertices) = @_;
|
|
|
|
|
2011-09-18 17:28:12 +00:00
|
|
|
# convert arrayref points to Point objects
|
2011-10-12 12:54:49 +00:00
|
|
|
@vertices = map Slic3r::Point->new($_), @vertices;
|
2011-09-01 19:06:28 +00:00
|
|
|
|
|
|
|
my $surface = Slic3r::Surface->new(
|
2011-09-18 17:28:12 +00:00
|
|
|
contour => Slic3r::Polyline::Closed->new(points => \@vertices),
|
2011-09-01 19:06:28 +00:00
|
|
|
);
|
|
|
|
push @{ $self->surfaces }, $surface;
|
|
|
|
|
2011-09-18 17:28:12 +00:00
|
|
|
# make sure our contour has its points in counter-clockwise order
|
|
|
|
$surface->contour->make_counter_clockwise;
|
|
|
|
|
2011-09-01 19:06:28 +00:00
|
|
|
return $surface;
|
|
|
|
}
|
|
|
|
|
|
|
|
sub add_line {
|
|
|
|
my $self = shift;
|
2011-10-04 15:55:55 +00:00
|
|
|
my ($line) = @_;
|
2011-09-01 19:06:28 +00:00
|
|
|
|
2011-10-08 17:02:05 +00:00
|
|
|
return if $line->a->coincides_with($line->b);
|
2011-09-01 19:06:28 +00:00
|
|
|
|
|
|
|
push @{ $self->lines }, $line;
|
|
|
|
return $line;
|
|
|
|
}
|
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
# merge overlapping lines
|
|
|
|
sub cleanup_lines {
|
2011-09-01 19:06:28 +00:00
|
|
|
my $self = shift;
|
2011-11-11 21:01:27 +00:00
|
|
|
|
|
|
|
my $lines = $self->lines;
|
|
|
|
my $line_count = @$lines;
|
|
|
|
|
|
|
|
for (my $i = 0; $i <= $#$lines-1; $i++) {
|
|
|
|
for (my $j = $i+1; $j <= $#$lines; $j++) {
|
|
|
|
# lines are collinear and overlapping?
|
|
|
|
next unless collinear($lines->[$i], $lines->[$j], 1);
|
|
|
|
|
|
|
|
# lines have same orientation?
|
|
|
|
next unless ($lines->[$i][A][X] <=> $lines->[$i][B][X]) == ($lines->[$j][A][X] <=> $lines->[$j][B][X])
|
|
|
|
&& ($lines->[$i][A][Y] <=> $lines->[$i][B][Y]) == ($lines->[$j][A][Y] <=> $lines->[$j][B][Y]);
|
|
|
|
|
|
|
|
# resulting line
|
|
|
|
my @x = sort { $a <=> $b } ($lines->[$i][A][X], $lines->[$i][B][X], $lines->[$j][A][X], $lines->[$j][B][X]);
|
|
|
|
my @y = sort { $a <=> $b } ($lines->[$i][A][Y], $lines->[$i][B][Y], $lines->[$j][A][Y], $lines->[$j][B][Y]);
|
|
|
|
my $new_line = Slic3r::Line->new([$x[0], $y[0]], [$x[-1], $y[-1]]);
|
|
|
|
for (X, Y) {
|
|
|
|
($new_line->[A][$_], $new_line->[B][$_]) = ($new_line->[B][$_], $new_line->[A][$_])
|
|
|
|
if $lines->[$i][A][$_] > $lines->[$i][B][$_];
|
|
|
|
}
|
|
|
|
|
|
|
|
# save new line and remove found one
|
|
|
|
$lines->[$i] = $new_line;
|
|
|
|
splice @$lines, $j, 1;
|
|
|
|
$j--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
Slic3r::debugf " merging %d lines resulted in %d lines\n", $line_count, scalar(@$lines);
|
2011-09-01 19:06:28 +00:00
|
|
|
}
|
|
|
|
|
2011-10-09 17:47:21 +00:00
|
|
|
# build polylines from lines
|
|
|
|
sub make_surfaces {
|
2011-09-01 19:06:28 +00:00
|
|
|
my $self = shift;
|
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
if (0) {
|
|
|
|
require "Slic3r/SVG.pm";
|
|
|
|
Slic3r::SVG::output(undef, "lines.svg",
|
|
|
|
lines => [ grep !$_->isa('Slic3r::Line::FacetEdge'), @{$self->lines} ],
|
|
|
|
red_lines => [ grep $_->isa('Slic3r::Line::FacetEdge'), @{$self->lines} ],
|
|
|
|
);
|
2011-10-07 17:07:57 +00:00
|
|
|
}
|
2011-09-18 17:28:12 +00:00
|
|
|
|
2011-11-11 09:21:48 +00:00
|
|
|
my (@polygons, %visited_lines, @discarded_lines, @discarded_polylines) = ();
|
2011-11-11 21:01:27 +00:00
|
|
|
|
|
|
|
my $detect = sub {
|
|
|
|
my @lines = @{$self->lines};
|
|
|
|
(@polygons, %visited_lines, @discarded_lines, @discarded_polylines) = ();
|
|
|
|
my $get_point_id = sub { sprintf "%.0f,%.0f", @{$_[0]} };
|
2011-11-11 09:21:48 +00:00
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
my (%pointmap, @pointmap_keys) = ();
|
|
|
|
foreach my $line (@lines) {
|
|
|
|
my $point_id = $get_point_id->($line->[A]);
|
|
|
|
if (!exists $pointmap{$point_id}) {
|
|
|
|
$pointmap{$point_id} = [];
|
|
|
|
push @pointmap_keys, $line->[A];
|
|
|
|
}
|
|
|
|
push @{ $pointmap{$point_id} }, $line;
|
|
|
|
}
|
2011-10-08 17:02:05 +00:00
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
my $n = 0;
|
|
|
|
while (my $first_line = shift @lines) {
|
|
|
|
next if $visited_lines{ $first_line->id };
|
|
|
|
my @points = @$first_line;
|
|
|
|
|
|
|
|
my @seen_lines = ($first_line);
|
|
|
|
my %seen_points = map { $get_point_id->($points[$_]) => $_ } 0..1;
|
2011-10-09 20:18:06 +00:00
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
CYCLE: while (1) {
|
|
|
|
my $next_lines = $pointmap{ $get_point_id->($points[-1]) };
|
2011-10-11 13:51:08 +00:00
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
# shouldn't we find the point, let's try with a slower algorithm
|
|
|
|
# as approximation may make the coordinates differ
|
|
|
|
if (!$next_lines) {
|
|
|
|
my $nearest_point = nearest_point($points[-1], \@pointmap_keys);
|
|
|
|
#printf " we have a nearest point: %f,%f (%s)\n", @$nearest_point, $get_point_id->($nearest_point);
|
|
|
|
|
|
|
|
if ($nearest_point) {
|
|
|
|
local $Slic3r::Geometry::epsilon = 1000000;
|
|
|
|
$next_lines = $pointmap{$get_point_id->($nearest_point)}
|
|
|
|
if points_coincide($points[-1], $nearest_point);
|
|
|
|
}
|
2011-10-09 20:18:06 +00:00
|
|
|
}
|
2011-11-11 21:01:27 +00:00
|
|
|
|
|
|
|
#Slic3r::SVG::output(undef, "lines.svg",
|
|
|
|
# lines => [ map $_->p, grep !$_->isa('Slic3r::Line::FacetEdge'), @{$self->lines} ],
|
|
|
|
# red_lines => [ map $_->p, grep $_->isa('Slic3r::Line::FacetEdge'), @{$self->lines} ],
|
|
|
|
# points => [ $points[-1] ],
|
|
|
|
# no_arrows => 1,
|
|
|
|
#) if !$next_lines;
|
|
|
|
|
|
|
|
$next_lines
|
|
|
|
or die sprintf("No lines start at point %s. This shouldn't happen. Please check the model for manifoldness.", $get_point_id->($points[-1]));
|
|
|
|
last CYCLE if !@$next_lines;
|
|
|
|
|
|
|
|
my @ordered_next_lines = sort
|
|
|
|
{ angle3points($points[-1], $points[-2], $next_lines->[$a][B]) <=> angle3points($points[-1], $points[-2], $next_lines->[$b][B]) }
|
|
|
|
0..$#$next_lines;
|
|
|
|
|
|
|
|
#if (@$next_lines > 1) {
|
|
|
|
# Slic3r::SVG::output(undef, "next_line.svg",
|
|
|
|
# lines => $next_lines,
|
|
|
|
# red_lines => [ polyline_lines([@points]) ],
|
|
|
|
# green_lines => [ $next_lines->[ $ordered_next_lines[0] ] ],
|
|
|
|
# );
|
|
|
|
#}
|
|
|
|
|
|
|
|
my ($next_line) = splice @$next_lines, $ordered_next_lines[0], 1;
|
|
|
|
push @seen_lines, $next_line;
|
|
|
|
|
|
|
|
push @points, $next_line->[B];
|
|
|
|
|
|
|
|
my $point_id = $get_point_id->($points[-1]);
|
|
|
|
if ($seen_points{$point_id}) {
|
|
|
|
splice @points, 0, $seen_points{$point_id};
|
|
|
|
last CYCLE;
|
|
|
|
}
|
|
|
|
|
|
|
|
$seen_points{$point_id} = $#points;
|
2011-10-09 20:18:06 +00:00
|
|
|
}
|
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
if (@points < 4 || !points_coincide($points[0], $points[-1])) {
|
|
|
|
# discarding polyline
|
|
|
|
push @discarded_lines, @seen_lines;
|
|
|
|
if (@points > 2) {
|
|
|
|
push @discarded_polylines, [@points];
|
|
|
|
}
|
|
|
|
next;
|
2011-10-08 17:02:05 +00:00
|
|
|
}
|
2011-09-01 19:06:28 +00:00
|
|
|
|
2011-11-11 21:01:27 +00:00
|
|
|
$visited_lines{ $_->id } = 1 for @seen_lines;
|
|
|
|
pop @points;
|
|
|
|
Slic3r::debugf "Discovered polygon of %d points\n", scalar(@points);
|
|
|
|
push @polygons, Slic3r::Polygon->new(@points);
|
|
|
|
$polygons[-1]->cleanup;
|
2011-10-07 17:07:57 +00:00
|
|
|
}
|
2011-11-11 21:01:27 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
$detect->();
|
2011-09-01 19:06:28 +00:00
|
|
|
|
2011-11-11 09:21:48 +00:00
|
|
|
# Now, if we got a clean and manifold model then @polygons would contain everything
|
|
|
|
# we need to draw our layer. In real life, sadly, things are different and it is likely
|
|
|
|
# that the above algorithm wasn't able to detect every polygon. This may happen because
|
|
|
|
# of non-manifoldness or because of many close lines, often overlapping; both situations
|
|
|
|
# make a head-to-tail search difficult.
|
|
|
|
# On the other hand, we can safely assume that every polygon we detected is correct, as
|
|
|
|
# the above algorithm is quite strict. We can take a brute force approach to connect any
|
|
|
|
# other line.
|
|
|
|
|
|
|
|
# So, let's first check what lines were not detected as part of polygons.
|
2011-11-11 21:01:27 +00:00
|
|
|
if (@discarded_lines) {
|
2011-11-11 09:21:48 +00:00
|
|
|
Slic3r::debugf " %d lines out of %d were discarded and %d polylines were not closed\n",
|
|
|
|
scalar(@discarded_lines), scalar(@{$self->lines}), scalar(@discarded_polylines);
|
2011-11-11 21:01:27 +00:00
|
|
|
print " Warning: errors while parsing this layer (dirty or non-manifold model).\n";
|
|
|
|
print " Retrying with slower algorithm.\n";
|
2011-11-11 09:21:48 +00:00
|
|
|
|
|
|
|
if (0) {
|
|
|
|
require "Slic3r/SVG.pm";
|
|
|
|
Slic3r::SVG::output(undef, "layer" . $self->id . "_detected.svg",
|
|
|
|
white_polygons => \@polygons,
|
|
|
|
);
|
|
|
|
Slic3r::SVG::output(undef, "layer" . $self->id . "_discarded_lines.svg",
|
|
|
|
red_lines => \@discarded_lines,
|
|
|
|
);
|
|
|
|
Slic3r::SVG::output(undef, "layer" . $self->id . "_discarded_polylines.svg",
|
|
|
|
polylines => \@discarded_polylines,
|
|
|
|
);
|
|
|
|
exit;
|
|
|
|
}
|
2011-11-11 21:01:27 +00:00
|
|
|
|
|
|
|
$self->cleanup_lines;
|
|
|
|
$detect->();
|
|
|
|
|
|
|
|
if (@discarded_lines) {
|
|
|
|
print " Warning: even slow detection algorithm throwed errors. Review the output before printing.\n";
|
|
|
|
}
|
2011-11-11 09:21:48 +00:00
|
|
|
}
|
|
|
|
|
2011-10-09 17:47:21 +00:00
|
|
|
{
|
2011-11-16 13:53:30 +00:00
|
|
|
my $expolygons = union_ex([ @polygons ], PFT_EVENODD);
|
2011-11-11 09:21:48 +00:00
|
|
|
Slic3r::debugf " %d surface(s) having %d holes detected from %d polylines\n",
|
|
|
|
scalar(@$expolygons), scalar(map $_->holes, @$expolygons), scalar(@polygons);
|
2011-10-11 13:51:08 +00:00
|
|
|
|
2011-11-11 09:21:48 +00:00
|
|
|
push @{$self->surfaces},
|
|
|
|
map Slic3r::Surface->cast_from_expolygon($_, surface_type => 'internal'),
|
|
|
|
@$expolygons;
|
2011-09-01 19:06:28 +00:00
|
|
|
}
|
2011-10-10 14:31:37 +00:00
|
|
|
|
|
|
|
#use Slic3r::SVG;
|
|
|
|
#Slic3r::SVG::output(undef, "surfaces.svg",
|
|
|
|
# polygons => [ map $_->contour->p, @{$self->surfaces} ],
|
|
|
|
# red_polygons => [ map $_->p, map @{$_->holes}, @{$self->surfaces} ],
|
|
|
|
#);
|
2011-09-01 19:06:28 +00:00
|
|
|
}
|
|
|
|
|
2011-10-07 17:07:57 +00:00
|
|
|
sub remove_small_surfaces {
|
2011-09-26 09:59:06 +00:00
|
|
|
my $self = shift;
|
2011-10-07 17:07:57 +00:00
|
|
|
my @good_surfaces = ();
|
2011-09-26 09:59:06 +00:00
|
|
|
|
2011-10-09 17:47:21 +00:00
|
|
|
my $surface_count = scalar @{$self->surfaces};
|
2011-10-07 17:07:57 +00:00
|
|
|
foreach my $surface (@{$self->surfaces}) {
|
|
|
|
next if !$surface->contour->is_printable;
|
|
|
|
@{$surface->holes} = grep $_->is_printable, @{$surface->holes};
|
|
|
|
push @good_surfaces, $surface;
|
2011-09-26 09:59:06 +00:00
|
|
|
}
|
2011-10-07 17:07:57 +00:00
|
|
|
|
|
|
|
@{$self->surfaces} = @good_surfaces;
|
2011-10-09 17:47:21 +00:00
|
|
|
Slic3r::debugf "removed %d small surfaces at layer %d\n",
|
|
|
|
($surface_count - @good_surfaces), $self->id
|
|
|
|
if @good_surfaces != $surface_count;
|
2011-10-07 17:07:57 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
sub remove_small_perimeters {
|
|
|
|
my $self = shift;
|
|
|
|
my @good_perimeters = grep $_->is_printable, @{$self->perimeters};
|
2011-10-09 17:47:21 +00:00
|
|
|
Slic3r::debugf "removed %d unprintable perimeters at layer %d\n",
|
|
|
|
(@{$self->perimeters} - @good_perimeters), $self->id
|
2011-09-26 09:59:06 +00:00
|
|
|
if @good_perimeters != @{$self->perimeters};
|
|
|
|
|
|
|
|
@{$self->perimeters} = @good_perimeters;
|
|
|
|
}
|
|
|
|
|
2011-10-07 17:07:57 +00:00
|
|
|
# make bridges printable
|
|
|
|
sub process_bridges {
|
|
|
|
my $self = shift;
|
|
|
|
return if $self->id == 0;
|
|
|
|
|
|
|
|
# a bottom surface on a layer > 0 is either a bridge or a overhang
|
|
|
|
# or a combination of both
|
|
|
|
|
|
|
|
my @bottom_surfaces = grep $_->surface_type eq 'bottom', @{$self->surfaces} or return;
|
|
|
|
my @supporting_surfaces = grep $_->surface_type =~ /internal/, @{$self->surfaces};
|
|
|
|
|
|
|
|
SURFACE: foreach my $surface (@bottom_surfaces) {
|
|
|
|
# since we can't print concave bridges, we transform the surface
|
|
|
|
# in a convex polygon; this will print thin membranes eventually
|
2011-10-15 09:36:05 +00:00
|
|
|
my $surface_p = $surface->contour->p;
|
2011-10-07 17:07:57 +00:00
|
|
|
|
2011-10-13 20:22:45 +00:00
|
|
|
# offset the surface a bit to avoid approximation issues when doing the
|
|
|
|
# intersection below (this is to make sure we overlap with supporting
|
|
|
|
# surfaces, otherwise a little gap will result from intersection)
|
2011-10-18 13:57:53 +00:00
|
|
|
$surface_p = safety_offset([$surface_p])->[0];
|
2011-10-13 20:22:45 +00:00
|
|
|
|
2011-10-09 20:18:06 +00:00
|
|
|
#use Slic3r::SVG;
|
|
|
|
#Slic3r::SVG::output(undef, "bridge.svg",
|
|
|
|
# green_polygons => [ map $_->p, @supporting_surfaces ],
|
|
|
|
# red_polygons => [ $surface_p ],
|
|
|
|
#);
|
|
|
|
|
2011-10-07 17:07:57 +00:00
|
|
|
# find all supported edges (as polylines, thus keeping notion of
|
|
|
|
# consecutive supported edges)
|
|
|
|
my @supported_polylines = ();
|
|
|
|
{
|
|
|
|
my @current_polyline = ();
|
|
|
|
EDGE: foreach my $edge (Slic3r::Geometry::polygon_lines($surface_p)) {
|
2011-10-09 17:47:21 +00:00
|
|
|
for my $supporting_surface (@supporting_surfaces) {
|
2011-10-07 17:07:57 +00:00
|
|
|
local $Slic3r::Geometry::epsilon = 1E+7;
|
2011-10-09 17:47:21 +00:00
|
|
|
if (Slic3r::Geometry::polygon_has_subsegment($supporting_surface->contour->p, $edge)) {
|
2011-10-07 17:07:57 +00:00
|
|
|
push @current_polyline, $edge;
|
|
|
|
next EDGE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (@current_polyline) {
|
|
|
|
push @supported_polylines, [@current_polyline];
|
|
|
|
@current_polyline = ();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
push @supported_polylines, [@current_polyline] if @current_polyline;
|
|
|
|
}
|
|
|
|
|
|
|
|
# defensive programming, this shouldn't happen
|
|
|
|
if (@supported_polylines == 0) {
|
|
|
|
Slic3r::debugf "Found bridge/overhang with no supports on layer %d; ignoring\n", $self->id;
|
|
|
|
next SURFACE;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (@supported_polylines == 1) {
|
|
|
|
Slic3r::debugf "Found bridge/overhang with only one support on layer %d; ignoring\n", $self->id;
|
|
|
|
next SURFACE;
|
|
|
|
}
|
|
|
|
|
|
|
|
# now connect the first point to the last of each polyline
|
|
|
|
@supported_polylines = map [ $_->[0]->[0], $_->[-1]->[-1] ], @supported_polylines;
|
2011-10-08 17:02:05 +00:00
|
|
|
# @supported_polylines becomes actually an array of lines
|
2011-10-07 17:07:57 +00:00
|
|
|
|
|
|
|
# if we got more than two supports, get the longest two
|
|
|
|
if (@supported_polylines > 2) {
|
2011-10-08 17:02:05 +00:00
|
|
|
my %lengths = map { $_ => Slic3r::Geometry::line_length($_) } @supported_polylines;
|
2011-10-07 17:07:57 +00:00
|
|
|
@supported_polylines = sort { $lengths{"$a"} <=> $lengths{"$b"} } @supported_polylines;
|
2011-10-08 17:02:05 +00:00
|
|
|
@supported_polylines = @supported_polylines[-2,-1];
|
2011-10-07 17:07:57 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
# connect the midpoints, that will give the the optimal infill direction
|
|
|
|
my @midpoints = map Slic3r::Geometry::midpoint($_), @supported_polylines;
|
|
|
|
my $bridge_angle = -Slic3r::Geometry::rad2deg(Slic3r::Geometry::line_atan(\@midpoints) + PI/2);
|
|
|
|
Slic3r::debugf "Optimal infill angle of bridge on layer %d is %d degrees\n", $self->id, $bridge_angle;
|
|
|
|
|
|
|
|
# detect which neighbor surfaces are now supporting our bridge
|
|
|
|
my @supporting_neighbor_surfaces = ();
|
|
|
|
foreach my $supporting_surface (@supporting_surfaces) {
|
|
|
|
local $Slic3r::Geometry::epsilon = 1E+7;
|
|
|
|
push @supporting_neighbor_surfaces, $supporting_surface
|
|
|
|
if grep Slic3r::Geometry::polygon_has_vertex($supporting_surface->contour->p, $_),
|
|
|
|
map $_->[0], @supported_polylines;
|
|
|
|
}
|
|
|
|
|
|
|
|
# defensive programming, this shouldn't happen
|
|
|
|
if (@supporting_neighbor_surfaces == 0) {
|
|
|
|
Slic3r::debugf "Couldn't find supporting surfaces on layer %d; ignoring\n", $self->id;
|
|
|
|
next SURFACE;
|
|
|
|
}
|
|
|
|
|
|
|
|
# now, extend our bridge by taking a portion of supporting surfaces
|
|
|
|
{
|
2011-10-08 17:02:05 +00:00
|
|
|
# offset the bridge by the specified amount of mm
|
|
|
|
my $bridge_offset = ${ offset([$surface_p], $Slic3r::bridge_overlap / $Slic3r::resolution, $Slic3r::resolution * 100, JT_MITER, 2) }[0];
|
2011-10-07 17:07:57 +00:00
|
|
|
|
|
|
|
# calculate the new bridge
|
|
|
|
my $clipper = Math::Clipper->new;
|
|
|
|
$clipper->add_subject_polygon($surface_p);
|
|
|
|
$clipper->add_subject_polygons([ map $_->p, @supporting_neighbor_surfaces ]);
|
|
|
|
$clipper->add_clip_polygon($bridge_offset);
|
|
|
|
my $intersection = $clipper->execute(CT_INTERSECTION, PFT_NONZERO, PFT_NONZERO);
|
|
|
|
|
|
|
|
push @{$self->bridges}, map Slic3r::Surface::Bridge->cast_from_polygon($_,
|
|
|
|
surface_type => 'bottom',
|
|
|
|
bridge_angle => $bridge_angle,
|
|
|
|
), @$intersection;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
# generates a set of surfaces that will be used to make perimeters
|
|
|
|
# thus, we need to merge internal surfaces and bridges
|
|
|
|
sub detect_perimeter_surfaces {
|
|
|
|
my $self = shift;
|
|
|
|
|
|
|
|
# little optimization: skip the Clipper UNION if we have no bridges
|
|
|
|
if (!@{$self->bridges}) {
|
|
|
|
push @{$self->perimeter_surfaces}, @{$self->surfaces};
|
|
|
|
} else {
|
|
|
|
my $clipper = Math::Clipper->new;
|
|
|
|
$clipper->add_subject_polygons([ map $_->p, grep $_->surface_type =~ /internal/, @{$self->surfaces} ]);
|
|
|
|
$clipper->add_clip_polygons([ map $_->p, @{$self->bridges} ]);
|
|
|
|
my $union = $clipper->ex_execute(CT_UNION, PFT_NONZERO, PFT_NONZERO);
|
|
|
|
|
|
|
|
push @{$self->perimeter_surfaces},
|
|
|
|
map Slic3r::Surface->cast_from_expolygon($_, surface_type => 'internal'),
|
|
|
|
@$union;
|
|
|
|
|
|
|
|
push @{$self->perimeter_surfaces},
|
|
|
|
grep $_->surface_type !~ /internal/ && ($_->surface_type ne 'bottom' || $self->id == 0),
|
|
|
|
@{$self->surfaces};
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
# splits fill_surfaces in internal and bridge surfaces
|
|
|
|
sub split_bridges_fills {
|
|
|
|
my $self = shift;
|
|
|
|
|
|
|
|
my $clipper = Math::Clipper->new;
|
2011-10-15 09:36:05 +00:00
|
|
|
foreach my $surfaces (@{$self->fill_surfaces}) {
|
|
|
|
my @surfaces = @$surfaces;
|
|
|
|
@$surfaces = ();
|
2011-10-07 17:07:57 +00:00
|
|
|
|
|
|
|
# intersect fill_surfaces with bridges to get actual bridges
|
|
|
|
foreach my $bridge (@{$self->bridges}) {
|
|
|
|
$clipper->clear;
|
|
|
|
$clipper->add_subject_polygons([ map $_->p, @surfaces ]);
|
|
|
|
$clipper->add_clip_polygon($bridge->contour->p);
|
|
|
|
my $intersection = $clipper->ex_execute(CT_INTERSECTION, PFT_NONZERO, PFT_NONZERO);
|
2011-10-15 09:36:05 +00:00
|
|
|
push @$surfaces, map Slic3r::Surface::Bridge->cast_from_expolygon($_,
|
2011-10-07 17:07:57 +00:00
|
|
|
surface_type => 'bottom',
|
|
|
|
bridge_angle => $bridge->bridge_angle,
|
|
|
|
), @$intersection;
|
|
|
|
}
|
|
|
|
|
|
|
|
# difference between fill_surfaces and bridges are the other surfaces
|
|
|
|
foreach my $surface (@surfaces) {
|
|
|
|
$clipper->clear;
|
|
|
|
$clipper->add_subject_polygons([ $surface->p ]);
|
|
|
|
$clipper->add_clip_polygons([ map $_->contour->p, @{$self->bridges} ]);
|
|
|
|
my $difference = $clipper->ex_execute(CT_DIFFERENCE, PFT_NONZERO, PFT_NONZERO);
|
2011-10-15 09:36:05 +00:00
|
|
|
push @$surfaces, map Slic3r::Surface->cast_from_expolygon($_,
|
2011-10-07 17:07:57 +00:00
|
|
|
surface_type => $surface->surface_type), @$difference;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-09-01 19:06:28 +00:00
|
|
|
1;
|