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Slic3r
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Large refactoring. Cleaner logic, smaller memory footprint.

degen-loop-screen
Alessandro Ranellucci 2011-11-23 12:29:27 +01:00
parent 13ef24b5eb
commit 8598b66b0a
6 changed files with 178 additions and 247 deletions
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95
lib/Slic3r/Fill.pm
View File

@ -11,6 +11,7 @@ use Slic3r::Fill::PlanePath;
use Slic3r::Fill::Rectilinear;
use Slic3r::Fill::Rectilinear2;
use Slic3r::Geometry qw(shortest_path);
use Slic3r::Geometry::Clipper qw(union_ex diff_ex);
use XXX;
@ -45,51 +46,65 @@ sub make_fill {
printf "Filling layer %d:\n", $layer->id;
# organize $layer->fill_surfaces using a shortest path search
@{ $layer->fill_surfaces } = @{shortest_path([
map [ $_->[0]->contour->points->[0], $_ ], grep @$_, @{ $layer->fill_surfaces },
])};
foreach my $surfaces (@{ $layer->fill_surfaces }) {
# organize $surfaces using a shortest path search
@$surfaces = @{shortest_path([
map [ $_->contour->points->[0], $_ ], @$surfaces,
])};
SURFACE: foreach my $surface (@$surfaces) {
my $filler = $Slic3r::fill_pattern;
my $density = $Slic3r::fill_density;
my $flow_width = $Slic3r::flow_width;
# merge overlapping surfaces
my @surfaces = ();
{
my @surfaces_with_bridge_angle = grep defined $_->bridge_angle, @{$layer->surfaces};
foreach my $group (Slic3r::Surface->group({merge_solid => 1}, @{$layer->surfaces})) {
my $union = union_ex([ map $_->p, @$group ]);
# force 100% density and rectilinear fill for external surfaces
if ($surface->surface_type ne 'internal') {
my $is_bridge = $layer->id > 0 && $surface->surface_type eq 'bottom';
$density = 1;
$filler = $is_bridge ? 'rectilinear' : $Slic3r::solid_fill_pattern;
$flow_width = $Slic3r::nozzle_diameter if $is_bridge;
} else {
next SURFACE unless $density > 0;
# subtract surfaces having a defined bridge_angle from any other
if (@surfaces_with_bridge_angle && !defined $group->[0]->bridge_angle) {
$union = diff_ex(
[ map @$_, @$union ],
[ map $_->p, @surfaces_with_bridge_angle ],
);
}
my @paths = $self->fillers->{$filler}->fill_surface(
$surface,
density => $density,
flow_width => $flow_width,
);
# save into layer
push @{ $layer->fills }, Slic3r::ExtrusionPath::Collection->new(
paths => [
map Slic3r::ExtrusionPath->cast(
[ @$_ ],
depth_layers => $surface->depth_layers,
), @paths,
],
);
$layer->fills->[-1]->cleanup;
push @surfaces, map Slic3r::Surface->cast_from_expolygon($_,
surface_type => $group->[0]->surface_type,
bridge_angle => $group->[0]->bridge_angle,
), @$union;
}
}
# organize infill surfaces using a shortest path search
@surfaces = @{shortest_path([
map [ $_->contour->points->[0], $_ ], @surfaces,
])};
SURFACE: foreach my $surface (@surfaces) {
my $filler = $Slic3r::fill_pattern;
my $density = $Slic3r::fill_density;
my $flow_width = $Slic3r::flow_width;
# force 100% density and rectilinear fill for external surfaces
if ($surface->surface_type ne 'internal') {
my $is_bridge = $layer->id > 0 && $surface->surface_type eq 'bottom';
$density = 1;
$filler = $is_bridge ? 'rectilinear' : $Slic3r::solid_fill_pattern;
$flow_width = $Slic3r::nozzle_diameter if $is_bridge;
} else {
next SURFACE unless $density > 0;
}
my @paths = $self->fillers->{$filler}->fill_surface(
$surface,
density => $density,
flow_width => $flow_width,
);
# save into layer
push @{ $layer->fills }, Slic3r::ExtrusionPath::Collection->new(
paths => [
map Slic3r::ExtrusionPath->cast(
[ @$_ ],
depth_layers => $surface->depth_layers,
), @paths,
],
);
$layer->fills->[-1]->cleanup;
}
}
1;

104
lib/Slic3r/Layer.pm
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@ -29,20 +29,6 @@ has 'surfaces' => (
default => sub { [] },
);
# collection of surfaces representing bridges
has 'bridges' => (
is => 'rw',
#isa => 'ArrayRef[Slic3r::Surface]',
default => sub { [] },
);
# collection of surfaces to make perimeters for
has 'perimeter_surfaces' => (
is => 'rw',
#isa => 'ArrayRef[Slic3r::Surface]',
default => sub { [] },
);
# ordered collection of extrusion paths to build all perimeters
has 'perimeters' => (
is => 'rw',
@ -58,10 +44,10 @@ has 'skirts' => (
);
# collection of surfaces generated by offsetting the innermost perimeter(s)
# they represent boundaries of areas to fill (grouped by original objects)
has 'fill_surfaces' => (
# they represent boundaries of areas to fill
has 'fill_boundaries' => (
is => 'rw',
#isa => 'ArrayRef[ArrayRef[Slic3r::Surface]]',
#isa => 'ArrayRef[Slic3r::Surface]',
default => sub { [] },
);
@ -352,6 +338,8 @@ sub remove_small_perimeters {
sub process_bridges {
my $self = shift;
my @bridges = ();
# a bottom surface on a layer > 0 is either a bridge or a overhang
# or a combination of both; any top surface is a candidate for
# reverse bridge processing
@ -426,8 +414,8 @@ sub process_bridges {
# now, extend our bridge by taking a portion of supporting surfaces
{
# offset the bridge by the specified amount of mm
my $bridge_overlap = 2 * $Slic3r::perimeters * $Slic3r::flow_width / $Slic3r::resolution;
# offset the bridge by the specified amount of mm (minimum 3)
my $bridge_overlap = 3 / $Slic3r::resolution;
my ($bridge_offset) = $expolygon->contour->offset($bridge_overlap, $Slic3r::resolution * 100, JT_MITER, 2);
# calculate the new bridge
@ -436,7 +424,7 @@ sub process_bridges {
[ $bridge_offset ],
);
push @{$self->bridges}, map Slic3r::Surface->cast_from_expolygon($_,
push @bridges, map Slic3r::Surface->cast_from_expolygon($_,
surface_type => $surface->surface_type,
bridge_angle => $bridge_angle,
), @$intersection;
@ -446,86 +434,52 @@ sub process_bridges {
# now we need to merge bridges to avoid overlapping
{
# build a list of unique bridge types
my @surface_groups = Slic3r::Surface->group(@{$self->bridges});
my @surface_groups = Slic3r::Surface->group(@bridges);
# merge bridges of the same type, removing any of the bridges already merged;
# the order of @surface_groups determines the priority between bridges having
# different surface_type or bridge_angle
@{$self->bridges} = ();
@bridges = ();
foreach my $surfaces (@surface_groups) {
my $union = union_ex([ map $_->p, @$surfaces ]);
my $diff = diff_ex(
[ map @$_, @$union ],
[ map $_->p, @{$self->bridges} ],
[ map $_->p, @bridges ],
);
push @{$self->bridges}, map Slic3r::Surface->cast_from_expolygon($_,
push @bridges, map Slic3r::Surface->cast_from_expolygon($_,
surface_type => $surfaces->[0]->surface_type,
bridge_angle => $surfaces->[0]->bridge_angle,
), @$union;
}
}
}
# 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 $union = union_ex([
(map $_->p, grep $_->surface_type =~ /internal/, @{$self->surfaces}),
(map $_->p, @{$self->bridges}),
]);
# apply bridges to layer
{
my @surfaces = @{$self->surfaces};
@{$self->surfaces} = ();
# schedule perimeters for internal surfaces merged with bridges
push @{$self->perimeter_surfaces},
map Slic3r::Surface->cast_from_expolygon($_, surface_type => 'internal'),
@$union;
# schedule perimeters for the remaining surfaces
foreach my $type (qw(top bottom)) {
my $diff = diff_ex(
[ map $_->p, grep $_->surface_type eq $type, @{$self->surfaces} ],
[ map @$_, @$union ],
);
push @{$self->perimeter_surfaces},
map Slic3r::Surface->cast_from_expolygon($_, surface_type => $type),
@$diff;
}
}
}
# splits fill_surfaces in internal and bridge surfaces
sub split_bridges_fills {
my $self = shift;
foreach my $surfaces (@{$self->fill_surfaces}) {
my @surfaces = @$surfaces;
@$surfaces = ();
# intersect fill_surfaces with bridges to get actual bridges
foreach my $bridge (@{$self->bridges}) {
my $intersection = intersection_ex(
# intersect layer surfaces with bridges to get actual bridges
foreach my $bridge (@bridges) {
my $actual_bridge = intersection_ex(
[ map $_->p, @surfaces ],
[ $bridge->p ],
);
push @$surfaces, map Slic3r::Surface->cast_from_expolygon($_,
push @{$self->surfaces}, map Slic3r::Surface->cast_from_expolygon($_,
surface_type => $bridge->surface_type,
bridge_angle => $bridge->bridge_angle,
), @$intersection;
), @$actual_bridge;
}
# difference between fill_surfaces and bridges are the other surfaces
foreach my $type (qw(top bottom internal internal-solid)) {
my @my_surfaces = grep $_->surface_type eq $type, @surfaces;
my $difference = diff_ex([ map $_->p, @my_surfaces ], [ map $_->p, @{$self->bridges} ]);
push @$surfaces, map Slic3r::Surface->cast_from_expolygon($_,
surface_type => $type), @$difference;
# difference between layer surfaces and bridges are the other surfaces
foreach my $group (Slic3r::Surface->group(@surfaces)) {
my $difference = diff_ex(
[ map $_->p, @$group ],
[ map $_->p, @bridges ],
);
push @{$self->surfaces}, map Slic3r::Surface->cast_from_expolygon($_,
surface_type => $group->[0]->surface_type), @$difference;
}
}
}

12
lib/Slic3r/Perimeter.pm
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@ -28,12 +28,12 @@ sub make_perimeter {
# )
my @perimeters = (); # one item per depth; each item
# organize $layer->perimeter_surfaces using a shortest path search
@{ $layer->perimeter_surfaces } = @{shortest_path([
map [ $_->contour->points->[0], $_ ], @{ $layer->perimeter_surfaces },
# organize perimeter surfaces using a shortest path search
my @surfaces = @{shortest_path([
map [ $_->contour->points->[0], $_ ], @{$layer->surfaces},
])};
foreach my $surface (@{ $layer->perimeter_surfaces }) {
foreach my $surface (@surfaces) {
# the outer loop must be offsetted by half extrusion width inwards
my @last_offsets = ($surface->expolygon);
my $distance = $Slic3r::flow_width / 2 / $Slic3r::resolution;
@ -52,11 +52,11 @@ sub make_perimeter {
# create one more offset to be used as boundary for fill
{
$distance -= $Slic3r::flow_width * $Slic3r::perimeter_infill_overlap_ratio / $Slic3r::resolution;
my @fill_surfaces = map Slic3r::Surface->cast_from_expolygon
my @fill_boundaries = map Slic3r::Surface->cast_from_expolygon
($_, surface_type => $surface->surface_type),
map $_->offset_ex(-$distance), @last_offsets;
push @{ $layer->fill_surfaces }, [@fill_surfaces] if @fill_surfaces;
push @{ $layer->fill_boundaries }, @fill_boundaries if @fill_boundaries;
}
}

172
lib/Slic3r/Print.pm
View File

@ -90,6 +90,17 @@ sub detect_surfaces_type {
@$expolygons;
};
# clip surfaces to the fill boundaries
foreach my $layer (@{$self->layers}) {
my $intersection = intersection_ex(
[ map $_->p, @{$layer->surfaces} ],
[ map $_->p, @{$layer->fill_boundaries} ],
);
@{$layer->surfaces} = map Slic3r::Surface->cast_from_expolygon
($_, surface_type => 'internal'),
@$intersection;
}
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layer = $self->layers->[$i];
Slic3r::debugf "Detecting solid surfaces for layer %d\n", $layer->id;
@ -110,22 +121,6 @@ sub detect_surfaces_type {
@top = $surface_difference->($layer->surfaces, $upper_surfaces, 'top');
# now check whether each resulting top surfaces is large enough to have its
# own perimeters or whether it may be sufficient to use the lower layer's
# perimeters
# offset upper layer's surfaces
my $upper_surfaces_offsetted;
{
my $distance = $Slic3r::flow_width * ($Slic3r::perimeters) / $Slic3r::resolution;
$upper_surfaces_offsetted = offset([ map $_->p, @{$upper_layer->surfaces} ], $distance, 100, JT_MITER, 2);
}
@top = grep {
my $surface = $_;
my $diff = diff_ex([ map $_->p, $surface ], $upper_surfaces_offsetted);
@$diff;
} @top;
} else {
# if no upper layer, all surfaces of this one are solid
@top = @{$layer->surfaces};
@ -152,18 +147,6 @@ sub detect_surfaces_type {
@{$surface->contour->points} = map Slic3r::Point->new($_), @{ $offset->[0] };
}
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output(undef, "layer_" . $layer->id . "_surfaces.svg",
green_polygons => [ map $_->p, @{$layer->surfaces} ],
red_polygons => [ map $_->p, @{$lower_layer->surfaces} ],
);
Slic3r::SVG::output(undef, "layer_" . $layer->id . "_diff.svg",
red_polygons => [ map $_->p, @bottom ],
);
exit if $layer->id == 3;
}
} else {
# if no lower layer, all surfaces of this one are solid
@bottom = @{$layer->surfaces};
@ -185,13 +168,6 @@ sub detect_surfaces_type {
# save surfaces to layer
$layer->surfaces([ @bottom, @top, @internal ]);
#use Slic3r::SVG;
#Slic3r::SVG::output(undef, "layer_" . $layer->id . ".svg",
# white_polygons => [ map $_->p, @internal ],
# green_polygons => [ map $_->p, @bottom ],
# red_polygons => [ map $_->p, @top ],
#);
Slic3r::debugf " layer %d has %d bottom, %d top and %d internal surfaces\n",
$layer->id, scalar(@bottom), scalar(@top), scalar(@internal);
}
@ -206,7 +182,7 @@ sub discover_horizontal_shells {
my $layer = $self->layers->[$i];
foreach my $type (qw(top bottom)) {
# find surfaces of current type for current layer
my @surfaces = grep $_->surface_type eq $type, map @$_, @{$layer->fill_surfaces} or next;
my @surfaces = grep $_->surface_type eq $type, @{$layer->surfaces} or next;
my $surfaces_p = [ map $_->p, @surfaces ];
Slic3r::debugf "Layer %d has %d surfaces of type '%s'\n",
$i, scalar(@surfaces), $type;
@ -218,56 +194,55 @@ sub discover_horizontal_shells {
next if $n < 0 || $n >= $self->layer_count;
Slic3r::debugf " looking for neighbors on layer %d...\n", $n;
foreach my $surfaces (@{$self->layers->[$n]->fill_surfaces}) {
my @neighbor = @$surfaces;
# find intersection between @surfaces and current layer's surfaces
# intersections have contours and holes
my $new_internal_solid = intersection_ex(
$surfaces_p,
[ map $_->p, grep $_->surface_type =~ /internal/, @neighbor ],
my $surfaces = $self->layers->[$n]->surfaces;
my @neighbor = @$surfaces;
# find intersection between @surfaces and current layer's surfaces
# intersections have contours and holes
my $new_internal_solid = intersection_ex(
$surfaces_p,
[ map $_->p, grep $_->surface_type =~ /internal/, @neighbor ],
);
next if !@$new_internal_solid;
# internal-solid are the union of the existing internal-solid surfaces
# and new ones
my $internal_solid = union_ex([
( map $_->p, grep $_->surface_type eq 'internal-solid', @neighbor ),
( map @$_, @$new_internal_solid ),
]);
# subtract intersections from layer surfaces to get resulting inner surfaces
my $internal = diff_ex(
[ map $_->p, grep $_->surface_type eq 'internal', @neighbor ],
[ map @$_, @$internal_solid ],
);
Slic3r::debugf " %d internal-solid and %d internal surfaces found\n",
scalar(@$internal_solid), scalar(@$internal);
# Note: due to floating point math we're going to get some very small
# polygons as $internal; they will be removed by removed_small_features()
# assign resulting inner surfaces to layer
@$surfaces = ();
push @$surfaces, Slic3r::Surface->cast_from_expolygon
($_, surface_type => 'internal')
for @$internal;
# assign new internal-solid surfaces to layer
push @$surfaces, Slic3r::Surface->cast_from_expolygon
($_, surface_type => 'internal-solid')
for @$internal_solid;
# assign top and bottom surfaces to layer
foreach my $s (Slic3r::Surface->group(grep $_->surface_type =~ /top|bottom/, @neighbor)) {
my $solid_surfaces = diff_ex(
[ map $_->p, @$s ],
[ map @$_, @$internal_solid, @$internal ],
);
next if !@$new_internal_solid;
# internal-solid are the union of the existing internal-solid surfaces
# and new ones
my $internal_solid = union_ex([
( map $_->p, grep $_->surface_type eq 'internal-solid', @neighbor ),
( map @$_, @$new_internal_solid ),
]);
# subtract intersections from layer surfaces to get resulting inner surfaces
my $internal = diff_ex(
[ map $_->p, grep $_->surface_type eq 'internal', @neighbor ],
[ map @$_, @$internal_solid ],
);
Slic3r::debugf " %d internal-solid and %d internal surfaces found\n",
scalar(@$internal_solid), scalar(@$internal);
# Note: due to floating point math we're going to get some very small
# polygons as $internal; they will be removed by removed_small_features()
# assign resulting inner surfaces to layer
@$surfaces = ();
push @$surfaces, Slic3r::Surface->cast_from_expolygon
($_, surface_type => 'internal')
for @$internal;
# assign new internal-solid surfaces to layer
push @$surfaces, Slic3r::Surface->cast_from_expolygon
($_, surface_type => 'internal-solid')
for @$internal_solid;
# assign top and bottom surfaces to layer
foreach my $s (Slic3r::Surface->group(grep $_->surface_type =~ /top|bottom/, @neighbor)) {
my $solid_surfaces = diff_ex(
[ map $_->p, @$s ],
[ map @$_, @$internal_solid, @$internal ],
);
push @$surfaces, Slic3r::Surface->cast_from_expolygon
($_, surface_type => $s->[0]->surface_type, bridge_angle => $s->[0]->bridge_angle)
for @$solid_surfaces;
}
($_, surface_type => $s->[0]->surface_type, bridge_angle => $s->[0]->bridge_angle)
for @$solid_surfaces;
}
}
}
@ -298,17 +273,6 @@ sub extrude_skirt {
push @{$_->skirts}, @skirts for @layers;
}
sub extrude_perimeters {
my $self = shift;
my $perimeter_extruder = Slic3r::Perimeter->new;
foreach my $layer (@{ $self->layers }) {
$layer->detect_perimeter_surfaces;
$perimeter_extruder->make_perimeter($layer);
}
}
# combine fill surfaces across layers
sub infill_every_layers {
my $self = shift;
@ -321,7 +285,7 @@ sub infill_every_layers {
my $layer = $self->layer($i);
# skip layer if no internal fill surfaces
next if !grep $_->surface_type eq 'internal', map @$_, @{$layer->fill_surfaces};
next if !grep $_->surface_type eq 'internal', map @$_, @{$layer->surfaces};
# for each possible depth, look for intersections with the lower layer
# we do this from the greater depth to the smaller
@ -331,10 +295,10 @@ sub infill_every_layers {
# select surfaces of the lower layer having the depth we're looking for
my @lower_surfaces = grep $_->depth_layers == $d && $_->surface_type eq 'internal',
map @$_, @{$lower_layer->fill_surfaces};
map @$_, @{$lower_layer->surfaces};
next if !@lower_surfaces;
# process each group of surfaces separately
foreach my $surfaces (@{$layer->fill_surfaces}) {
foreach my $surfaces (@{$layer->surfaces}) {
# calculate intersection between our surfaces and theirs
my $intersection = intersection_ex(
[ map $_->p, grep $_->depth_layers <= $d, @lower_surfaces ],
@ -371,7 +335,7 @@ sub infill_every_layers {
}
# now we remove the intersections from lower layer
foreach my $lower_surfaces (@{$lower_layer->fill_surfaces}) {
foreach my $lower_surfaces (@{$lower_layer->surfaces}) {
my @new_surfaces = ();
push @new_surfaces, grep $_->surface_type ne 'internal', @$lower_surfaces;
foreach my $depth (1..$Slic3r::infill_every_layers) {
@ -395,16 +359,6 @@ sub infill_every_layers {
}
}
sub extrude_fills {
my $self = shift;
my $fill_extruder = Slic3r::Fill->new('print' => $self);
foreach my $layer (@{ $self->layers }) {
$fill_extruder->make_fill($layer);
}
}
sub export_gcode {
my $self = shift;
my ($file) = @_;

36
lib/Slic3r/Skein.pm
View File

@ -19,33 +19,34 @@ sub go {
# each layer has surfaces with holes
my $print = Slic3r::Print->new_from_stl($self->input_file);
# this will detect the type of each surface (top/bottom/internal)
# by splitting them if necessary
# make skirt
$print->extrude_skirt;
# make perimeters
# this will add a set of extrusion loops to each layer
# as well as generate infill boundaries
{
my $perimeter_maker = Slic3r::Perimeter->new;
$perimeter_maker->make_perimeter($_) for @{$print->layers};
}
# this will prepare surfaces for perimeters by merging all
# surfaces in each layer; it will also clip $layer->surfaces
# to infill boundaries and split them in top/bottom/internal surfaces
$print->detect_surfaces_type;
# this will remove unprintable surfaces
# (those that are too tight for extrusion)
$_->remove_small_surfaces for @{$print->layers};
# make bridges printable
# this will add a set of bridges to each layer
# this will detect bridges and reverse bridges
# and rearrange top/bottom/internal surfaces
$_->process_bridges for @{$print->layers};
# make skirt
$print->extrude_skirt;
# make perimeters
# this will add a set of extrusion loops to each layer
# as well as a set of surfaces to be filled
$print->extrude_perimeters;
# this will remove unprintable perimeter loops
# (those that are too tight for extrusion)
$_->remove_small_perimeters for @{$print->layers};
# split fill_surfaces in internal and bridge surfaces
$_->split_bridges_fills for @{$print->layers};
# detect which fill surfaces are near external layers
# they will be split in internal and internal-solid surfaces
$print->discover_horizontal_shells;
@ -54,7 +55,10 @@ sub go {
$print->infill_every_layers;
# this will generate extrusion paths for each layer
$print->extrude_fills;
{
my $fill_maker = Slic3r::Fill->new('print' => $print);
$fill_maker->make_fill($_) for @{$print->layers};
}
# output everything to a GCODE file
if (!$self->output_file) {

6
lib/Slic3r/Surface.pm
View File

@ -52,9 +52,13 @@ sub cast_from_expolygon {
# static method to group surfaces having same surface_type and bridge_angle
sub group {
my $class = shift;
my $params = ref $_[0] eq 'HASH' ? shift(@_) : {};
my (@surfaces) = @_;
my $unique_type = sub { $_[0]->surface_type . "_" . ($_[0]->bridge_angle || '') };
my $unique_type = sub {
($params->{merge_solid} && $_[0]->surface_type =~ /top|bottom|solid/
? 'solid' : $_[0]->surface_type) . "_" . ($_[0]->bridge_angle || '');
};
my @unique_types = ();
foreach my $surface (@surfaces) {
my $type = $unique_type->($surface);