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Merge branch 'xs-perimetergenerator'

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Alessandro Ranellucci 2015-07-23 15:53:19 +02:00
commit 15d2522f3d
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533
lib/Slic3r/Layer/PerimeterGenerator.pm
View file

@ -1,533 +0,0 @@
package Slic3r::Layer::PerimeterGenerator;
use Moo;
use Slic3r::ExtrusionLoop ':roles';
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(scale unscale chained_path);
use Slic3r::Geometry::Clipper qw(union_ex diff diff_ex intersection_ex offset offset2
offset_ex offset2_ex intersection_ppl diff_ppl);
use Slic3r::Surface ':types';
has 'slices' => (is => 'ro', required => 1); # SurfaceCollection
has 'lower_slices' => (is => 'ro', required => 0);
has 'layer_height' => (is => 'ro', required => 1);
has 'layer_id' => (is => 'ro', required => 0, default => sub { -1 });
has 'perimeter_flow' => (is => 'ro', required => 1);
has 'ext_perimeter_flow' => (is => 'ro', required => 1);
has 'overhang_flow' => (is => 'ro', required => 1);
has 'solid_infill_flow' => (is => 'ro', required => 1);
has 'config' => (is => 'ro', default => sub { Slic3r::Config::PrintRegion->new });
has 'object_config' => (is => 'ro', default => sub { Slic3r::Config::PrintObject->new });
has 'print_config' => (is => 'ro', default => sub { Slic3r::Config::Print->new });
has '_lower_slices_p' => (is => 'rw', default => sub { [] });
has '_holes_pt' => (is => 'rw');
has '_ext_mm3_per_mm' => (is => 'rw');
has '_mm3_per_mm' => (is => 'rw');
has '_mm3_per_mm_overhang' => (is => 'rw');
# generated loops will be put here
has 'loops' => (is => 'ro', default => sub { Slic3r::ExtrusionPath::Collection->new });
# generated gap fills will be put here
has 'gap_fill' => (is => 'ro', default => sub { Slic3r::ExtrusionPath::Collection->new });
# generated fill surfaces will be put here
has 'fill_surfaces' => (is => 'ro', default => sub { Slic3r::Surface::Collection->new });
sub BUILDARGS {
my ($class, %args) = @_;
if (my $flow = delete $args{flow}) {
$args{perimeter_flow} //= $flow;
$args{ext_perimeter_flow} //= $flow;
$args{overhang_flow} //= $flow;
$args{solid_infill_flow} //= $flow;
}
return { %args };
}
sub process {
my ($self) = @_;
# other perimeters
$self->_mm3_per_mm($self->perimeter_flow->mm3_per_mm);
my $pwidth = $self->perimeter_flow->scaled_width;
my $pspacing = $self->perimeter_flow->scaled_spacing;
# external perimeters
$self->_ext_mm3_per_mm($self->ext_perimeter_flow->mm3_per_mm);
my $ext_pwidth = $self->ext_perimeter_flow->scaled_width;
my $ext_pspacing = scale($self->ext_perimeter_flow->spacing_to($self->perimeter_flow));
# overhang perimeters
$self->_mm3_per_mm_overhang($self->overhang_flow->mm3_per_mm);
# solid infill
my $ispacing = $self->solid_infill_flow->scaled_spacing;
my $gap_area_threshold = $pwidth ** 2;
# Calculate the minimum required spacing between two adjacent traces.
# This should be equal to the nominal flow spacing but we experiment
# with some tolerance in order to avoid triggering medial axis when
# some squishing might work. Loops are still spaced by the entire
# flow spacing; this only applies to collapsing parts.
my $min_spacing = $pspacing * (1 - &Slic3r::INSET_OVERLAP_TOLERANCE);
my $ext_min_spacing = $ext_pspacing * (1 - &Slic3r::INSET_OVERLAP_TOLERANCE);
# prepare grown lower layer slices for overhang detection
if ($self->lower_slices && $self->config->overhangs) {
# We consider overhang any part where the entire nozzle diameter is not supported by the
# lower layer, so we take lower slices and offset them by half the nozzle diameter used
# in the current layer
my $nozzle_diameter = $self->print_config->get_at('nozzle_diameter', $self->config->perimeter_extruder-1);
$self->_lower_slices_p(
offset([ map @$_, @{$self->lower_slices} ], scale +$nozzle_diameter/2)
);
}
# we need to process each island separately because we might have different
# extra perimeters for each one
foreach my $surface (@{$self->slices}) {
# detect how many perimeters must be generated for this island
my $loop_number = $self->config->perimeters + ($surface->extra_perimeters || 0);
$loop_number--; # 0-indexed loops
my @gaps = (); # Polygons
my @last = @{$surface->expolygon->simplify_p(&Slic3r::SCALED_RESOLUTION)};
if ($loop_number >= 0) { # no loops = -1
my @contours = (); # depth => [ Polygon, Polygon ... ]
my @holes = (); # depth => [ Polygon, Polygon ... ]
my @thin_walls = (); # Polylines
# we loop one time more than needed in order to find gaps after the last perimeter was applied
for my $i (0..($loop_number+1)) { # outer loop is 0
my @offsets = ();
if ($i == 0) {
# the minimum thickness of a single loop is:
# ext_width/2 + ext_spacing/2 + spacing/2 + width/2
if ($self->config->thin_walls) {
@offsets = @{offset2(
\@last,
-(0.5*$ext_pwidth + 0.5*$ext_min_spacing - 1),
+(0.5*$ext_min_spacing - 1),
)};
} else {
@offsets = @{offset(
\@last,
-0.5*$ext_pwidth,
)};
}
# look for thin walls
if ($self->config->thin_walls) {
my $diff = diff(
\@last,
offset(\@offsets, +0.5*$ext_pwidth),
1, # medial axis requires non-overlapping geometry
);
# the following offset2 ensures almost nothing in @thin_walls is narrower than $min_width
# (actually, something larger than that still may exist due to mitering or other causes)
my $min_width = $ext_pwidth / 2;
@thin_walls = @{offset2_ex($diff, -$min_width/2, +$min_width/2)};
# the maximum thickness of our thin wall area is equal to the minimum thickness of a single loop
@thin_walls = grep $_->length > $ext_pwidth*2,
map @{$_->medial_axis($ext_pwidth + $ext_pspacing, $min_width)}, @thin_walls;
Slic3r::debugf " %d thin walls detected\n", scalar(@thin_walls) if $Slic3r::debug;
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output(
"medial_axis.svg",
no_arrows => 1,
#expolygons => \@expp,
polylines => \@thin_walls,
);
}
}
} else {
my $distance = ($i == 1) ? $ext_pspacing : $pspacing;
if ($self->config->thin_walls) {
@offsets = @{offset2(
\@last,
-($distance + 0.5*$min_spacing - 1),
+(0.5*$min_spacing - 1),
)};
} else {
@offsets = @{offset(
\@last,
-$distance,
)};
}
# look for gaps
if ($self->config->gap_fill_speed > 0 && $self->config->fill_density > 0) {
# not using safety offset here would "detect" very narrow gaps
# (but still long enough to escape the area threshold) that gap fill
# won't be able to fill but we'd still remove from infill area
my $diff = diff_ex(
offset(\@last, -0.5*$distance),
offset(\@offsets, +0.5*$distance + 10), # safety offset
);
push @gaps, map $_->clone, map @$_, grep abs($_->area) >= $gap_area_threshold, @$diff;
}
}
last if !@offsets;
last if $i > $loop_number; # we were only looking for gaps this time
@last = @offsets;
$contours[$i] = [];
$holes[$i] = [];
foreach my $polygon (@offsets) {
my $loop = Slic3r::Layer::PerimeterGenerator::Loop->new(
polygon => $polygon,
is_contour => $polygon->is_counter_clockwise,
depth => $i,
);
if ($loop->is_contour) {
push @{$contours[$i]}, $loop;
} else {
push @{$holes[$i]}, $loop;
}
}
}
# nest loops: holes first
for my $d (0..$loop_number) {
# loop through all holes having depth $d
LOOP: for (my $i = 0; $i <= $#{$holes[$d]}; ++$i) {
my $loop = $holes[$d][$i];
# find the hole loop that contains this one, if any
for my $t (($d+1)..$loop_number) {
for (my $j = 0; $j <= $#{$holes[$t]}; ++$j) {
my $candidate_parent = $holes[$t][$j];
if ($candidate_parent->polygon->contains_point($loop->polygon->first_point)) {
$candidate_parent->add_child($loop);
splice @{$holes[$d]}, $i, 1;
--$i;
next LOOP;
}
}
}
# if no hole contains this hole, find the contour loop that contains it
for my $t (reverse 0..$loop_number) {
for (my $j = 0; $j <= $#{$contours[$t]}; ++$j) {
my $candidate_parent = $contours[$t][$j];
if ($candidate_parent->polygon->contains_point($loop->polygon->first_point)) {
$candidate_parent->add_child($loop);
splice @{$holes[$d]}, $i, 1;
--$i;
next LOOP;
}
}
}
}
}
# nest contour loops
for my $d (reverse 1..$loop_number) {
# loop through all contours having depth $d
LOOP: for (my $i = 0; $i <= $#{$contours[$d]}; ++$i) {
my $loop = $contours[$d][$i];
# find the contour loop that contains it
for my $t (reverse 0..($d-1)) {
for (my $j = 0; $j <= $#{$contours[$t]}; ++$j) {
my $candidate_parent = $contours[$t][$j];
if ($candidate_parent->polygon->contains_point($loop->polygon->first_point)) {
$candidate_parent->add_child($loop);
splice @{$contours[$d]}, $i, 1;
--$i;
next LOOP;
}
}
}
}
}
# at this point, all loops should be in $contours[0]
my @entities = $self->_traverse_loops($contours[0], \@thin_walls);
# if brim will be printed, reverse the order of perimeters so that
# we continue inwards after having finished the brim
# TODO: add test for perimeter order
@entities = reverse @entities
if $self->config->external_perimeters_first
|| ($self->layer_id == 0 && $self->print_config->brim_width > 0);
# append perimeters for this slice as a collection
$self->loops->append(Slic3r::ExtrusionPath::Collection->new(@entities))
if @entities;
}
# fill gaps
if (@gaps) {
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output(
"gaps.svg",
expolygons => union_ex(\@gaps),
);
}
# where $pwidth < thickness < 2*$pspacing, infill with width = 2*$pwidth
# where 0.1*$pwidth < thickness < $pwidth, infill with width = 1*$pwidth
my @gap_sizes = (
[ $pwidth, 2*$pspacing, unscale 2*$pwidth ],
[ 0.1*$pwidth, $pwidth, unscale 1*$pwidth ],
);
foreach my $gap_size (@gap_sizes) {
my @gap_fill = $self->_fill_gaps(@$gap_size, \@gaps);
$self->gap_fill->append($_) for @gap_fill;
# Make sure we don't infill narrow parts that are already gap-filled
# (we only consider this surface's gaps to reduce the diff() complexity).
# Growing actual extrusions ensures that gaps not filled by medial axis
# are not subtracted from fill surfaces (they might be too short gaps
# that medial axis skips but infill might join with other infill regions
# and use zigzag).
my $w = $gap_size->[2];
my @filled = map {
@{($_->isa('Slic3r::ExtrusionLoop') ? $_->polygon->split_at_first_point : $_->polyline)
->grow(scale $w/2)};
} @gap_fill;
@last = @{diff(\@last, \@filled)};
@gaps = @{diff(\@gaps, \@filled)}; # prevent more gap fill here
}
}
# create one more offset to be used as boundary for fill
# we offset by half the perimeter spacing (to get to the actual infill boundary)
# and then we offset back and forth by half the infill spacing to only consider the
# non-collapsing regions
my $inset = 0;
if ($loop_number == 0) {
# one loop
$inset += $ext_pspacing/2;
} elsif ($loop_number > 0) {
# two or more loops
$inset += $pspacing/2;
}
# only apply infill overlap if we actually have one perimeter
$inset -= $self->config->get_abs_value_over('infill_overlap', $inset + $ispacing/2)
if $inset > 0;
my $min_perimeter_infill_spacing = $ispacing * (1 - &Slic3r::INSET_OVERLAP_TOLERANCE);
$self->fill_surfaces->append($_)
for map Slic3r::Surface->new(expolygon => $_, surface_type => S_TYPE_INTERNAL), # use a bogus surface type
@{offset2_ex(
[ map @{$_->simplify_p(&Slic3r::SCALED_RESOLUTION)}, @{union_ex(\@last)} ],
-$inset -$min_perimeter_infill_spacing/2,
+$min_perimeter_infill_spacing/2,
)};
}
}
sub _traverse_loops {
my ($self, $loops, $thin_walls) = @_;
# loops is an arrayref of ::Loop objects
# turn each one into an ExtrusionLoop object
my $coll = Slic3r::ExtrusionPath::Collection->new;
foreach my $loop (@$loops) {
my $is_external = $loop->is_external;
my ($role, $loop_role);
if ($is_external) {
$role = EXTR_ROLE_EXTERNAL_PERIMETER;
} else {
$role = EXTR_ROLE_PERIMETER;
}
if ($loop->is_internal_contour) {
# Note that we set loop role to ContourInternalPerimeter
# also when loop is both internal and external (i.e.
# there's only one contour loop).
$loop_role = EXTRL_ROLE_CONTOUR_INTERNAL_PERIMETER;
} else {
$loop_role = EXTRL_ROLE_DEFAULT;
}
# detect overhanging/bridging perimeters
my @paths = ();
if ($self->config->overhangs && $self->layer_id > 0
&& !($self->object_config->support_material && $self->object_config->support_material_contact_distance == 0)) {
# get non-overhang paths by intersecting this loop with the grown lower slices
foreach my $polyline (@{ intersection_ppl([ $loop->polygon ], $self->_lower_slices_p) }) {
push @paths, Slic3r::ExtrusionPath->new(
polyline => $polyline,
role => $role,
mm3_per_mm => ($is_external ? $self->_ext_mm3_per_mm : $self->_mm3_per_mm),
width => ($is_external ? $self->ext_perimeter_flow->width : $self->perimeter_flow->width),
height => $self->layer_height,
);
}
# get overhang paths by checking what parts of this loop fall
# outside the grown lower slices (thus where the distance between
# the loop centerline and original lower slices is >= half nozzle diameter
foreach my $polyline (@{ diff_ppl([ $loop->polygon ], $self->_lower_slices_p) }) {
push @paths, Slic3r::ExtrusionPath->new(
polyline => $polyline,
role => EXTR_ROLE_OVERHANG_PERIMETER,
mm3_per_mm => $self->_mm3_per_mm_overhang,
width => $self->overhang_flow->width,
height => $self->overhang_flow->height,
);
}
# reapply the nearest point search for starting point
# (clone because the collection gets DESTROY'ed)
# We allow polyline reversal because Clipper may have randomly
# reversed polylines during clipping.
my $collection = Slic3r::ExtrusionPath::Collection->new(@paths); # temporary collection
@paths = map $_->clone, @{$collection->chained_path(0)};
} else {
push @paths, Slic3r::ExtrusionPath->new(
polyline => $loop->polygon->split_at_first_point,
role => $role,
mm3_per_mm => ($is_external ? $self->_ext_mm3_per_mm : $self->_mm3_per_mm),
width => ($is_external ? $self->ext_perimeter_flow->width : $self->perimeter_flow->width),
height => $self->layer_height,
);
}
my $eloop = Slic3r::ExtrusionLoop->new_from_paths(@paths);
$eloop->role($loop_role);
$coll->append($eloop);
}
# append thin walls to the nearest-neighbor search (only for first iteration)
if (@$thin_walls) {
foreach my $polyline (@$thin_walls) {
$coll->append(Slic3r::ExtrusionPath->new(
polyline => $polyline,
role => EXTR_ROLE_EXTERNAL_PERIMETER,
mm3_per_mm => $self->_mm3_per_mm,
width => $self->perimeter_flow->width,
height => $self->layer_height,
));
}
@$thin_walls = ();
}
# sort entities
my $sorted_coll = $coll->chained_path_indices(0);
my @indices = @{$sorted_coll->orig_indices};
# traverse children
my @entities = ();
for my $i (0..$#indices) {
my $idx = $indices[$i];
if ($idx > $#$loops) {
# this is a thin wall
# let's get it from the sorted collection as it might have been reversed
push @entities, $sorted_coll->[$i]->clone;
} else {
my $loop = $loops->[$idx];
my $eloop = $coll->[$idx]->clone;
my @children = $self->_traverse_loops($loop->children, $thin_walls);
if ($loop->is_contour) {
$eloop->make_counter_clockwise;
push @entities, @children, $eloop;
} else {
$eloop->make_clockwise;
push @entities, $eloop, @children;
}
}
}
return @entities;
}
sub _fill_gaps {
my ($self, $min, $max, $w, $gaps) = @_;
$min *= (1 - &Slic3r::INSET_OVERLAP_TOLERANCE);
my $this = diff_ex(
offset2($gaps, -$min/2, +$min/2),
offset2($gaps, -$max/2, +$max/2),
1,
);
my @polylines = map @{$_->medial_axis($max, $min/2)}, @$this;
return if !@polylines;
Slic3r::debugf " %d gaps filled with extrusion width = %s\n", scalar @$this, $w
if @$this;
#my $flow = $layerm->flow(FLOW_ROLE_SOLID_INFILL, 0, $w);
my $flow = Slic3r::Flow->new(
width => $w,
height => $self->layer_height,
nozzle_diameter => $self->solid_infill_flow->nozzle_diameter,
);
my %path_args = (
role => EXTR_ROLE_GAPFILL,
mm3_per_mm => $flow->mm3_per_mm,
width => $flow->width,
height => $self->layer_height,
);
my @entities = ();
foreach my $polyline (@polylines) {
#if ($polylines[$i]->isa('Slic3r::Polygon')) {
# my $loop = Slic3r::ExtrusionLoop->new;
# $loop->append(Slic3r::ExtrusionPath->new(polyline => $polylines[$i]->split_at_first_point, %path_args));
# $polylines[$i] = $loop;
if ($polyline->is_valid && $polyline->first_point->coincides_with($polyline->last_point)) {
# since medial_axis() now returns only Polyline objects, detect loops here
push @entities, my $loop = Slic3r::ExtrusionLoop->new;
$loop->append(Slic3r::ExtrusionPath->new(polyline => $polyline, %path_args));
} else {
push @entities, Slic3r::ExtrusionPath->new(polyline => $polyline, %path_args);
}
}
return @entities;
}
package Slic3r::Layer::PerimeterGenerator::Loop;
use Moo;
has 'polygon' => (is => 'ro', required => 1);
has 'is_contour' => (is => 'ro', required => 1);
has 'depth' => (is => 'ro', required => 1);
has 'children' => (is => 'ro', default => sub { [] });
use List::Util qw(first);
sub add_child {
my ($self, $child) = @_;
push @{$self->children}, $child;
}
sub is_external {
my ($self) = @_;
return $self->depth == 0;
}
sub is_internal_contour {
my ($self) = @_;
if ($self->is_contour) {
# an internal contour is a contour containing no other contours
return !defined first { $_->is_contour } @{$self->children};
}
return 0;
}
1;

30
lib/Slic3r/Layer/Region.pm
View file

@ -33,23 +33,25 @@ sub make_perimeters {
my $generator = Slic3r::Layer::PerimeterGenerator->new(
# input:
config => $self->config,
object_config => $self->layer->object->config,
print_config => $self->layer->print->config,
layer_height => $self->height,
layer_id => $self->layer->id,
slices => $slices,
lower_slices => defined($self->layer->lower_layer) ? $self->layer->lower_layer->slices : undef,
perimeter_flow => $self->flow(FLOW_ROLE_PERIMETER),
ext_perimeter_flow => $self->flow(FLOW_ROLE_EXTERNAL_PERIMETER),
overhang_flow => $self->region->flow(FLOW_ROLE_PERIMETER, -1, 1, 0, -1, $self->layer->object),
solid_infill_flow => $self->flow(FLOW_ROLE_SOLID_INFILL),
$slices,
$self->height,
$self->flow(FLOW_ROLE_PERIMETER),
$self->config,
$self->layer->object->config,
$self->layer->print->config,
# output:
loops => $self->perimeters,
gap_fill => $self->thin_fills,
fill_surfaces => $fill_surfaces,
$self->perimeters,
$self->thin_fills,
$fill_surfaces,
);
$generator->set_lower_slices($self->layer->lower_layer->slices)
if defined($self->layer->lower_layer);
$generator->set_layer_id($self->id);
$generator->set_ext_perimeter_flow($self->flow(FLOW_ROLE_EXTERNAL_PERIMETER));
$generator->set_overhang_flow($self->region->flow(FLOW_ROLE_PERIMETER, -1, 1, 0, -1, $self->layer->object));
$generator->set_solid_infill_flow($self->flow(FLOW_ROLE_SOLID_INFILL));
$generator->process;
}