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Infill refactoring and cleanup complete

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This commit is contained in:
Alessandro Ranellucci 2013-03-07 15:47:32 +01:00
parent d928f005e6
commit 36d24ccb0b
7 changed files with 108 additions and 162 deletions
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2
lib/Slic3r/Fill.pm
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@ -54,7 +54,7 @@ sub make_fill {
# merge adjacent surfaces
# in case of bridge surfaces, the ones with defined angle will be attached to the ones
# without any angle (shouldn't this logic be moved to process_bridges()?)
# without any angle (shouldn't this logic be moved to process_external_surfaces()?)
my @surfaces = ();
{
my @surfaces_with_bridge_angle = grep defined $_->bridge_angle, @{$layerm->fill_surfaces};

228
lib/Slic3r/Layer/Region.pm
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@ -2,7 +2,7 @@ package Slic3r::Layer::Region;
use Moo;
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(PI scale chained_path_items);
use Slic3r::Geometry qw(PI scale chained_path_items points_coincide);
use Slic3r::Geometry::Clipper qw(safety_offset union_ex diff_ex intersection_ex);
use Slic3r::Surface ':types';
@ -422,7 +422,7 @@ sub _add_perimeter {
my $self = shift;
my ($polygon, $role) = @_;
return unless $polygon->is_printable($self->perimeter_flow);
return unless $polygon->is_printable($self->perimeter_flow->scaled_width);
push @{ $self->perimeters }, Slic3r::ExtrusionLoop->pack(
polygon => $polygon,
role => ($role // EXTR_ROLE_PERIMETER),
@ -433,6 +433,11 @@ sub _add_perimeter {
sub prepare_fill_surfaces {
my $self = shift;
# if hollow object is requested, remove internal surfaces
if ($Slic3r::Config->fill_density == 0) {
@{$self->fill_surfaces} = grep $_->surface_type != S_TYPE_INTERNAL, @{$self->fill_surfaces};
}
# if no solid layers are requested, turn top/bottom surfaces to internal
if ($Slic3r::Config->top_solid_layers == 0) {
$_->surface_type(S_TYPE_INTERNAL) for grep $_->surface_type == S_TYPE_TOP, @{$self->fill_surfaces};
@ -441,7 +446,7 @@ sub prepare_fill_surfaces {
$_->surface_type(S_TYPE_INTERNAL) for grep $_->surface_type == S_TYPE_BOTTOM, @{$self->fill_surfaces};
}
# turn too small internal regions into solid regions
# turn too small internal regions into solid regions according to the user setting
{
my $min_area = scale scale $Slic3r::Config->solid_infill_below_area; # scaling an area requires two calls!
my @small = grep $_->surface_type == S_TYPE_INTERNAL && $_->expolygon->contour->area <= $min_area, @{$self->fill_surfaces};
@ -450,76 +455,99 @@ sub prepare_fill_surfaces {
}
}
# make bridges printable
sub process_bridges {
sub process_external_surfaces {
my $self = shift;
# no bridges are possible if we have no internal surfaces
return if $Slic3r::Config->fill_density == 0;
my @bridges = ();
# a bottom surface on a layer > 0 is either a bridge or a overhang
# or a combination of both; any top surface is a candidate for
# reverse bridge processing
my @solid_surfaces = grep {
($_->surface_type == S_TYPE_BOTTOM && $self->id > 0) || $_->surface_type == S_TYPE_TOP
} @{$self->fill_surfaces} or return;
my @internal_surfaces = grep $_->is_internal, @{$self->slices};
SURFACE: foreach my $surface (@solid_surfaces) {
my $expolygon = $surface->expolygon->safety_offset;
my $description = $surface->surface_type == S_TYPE_BOTTOM ? 'bridge/overhang' : 'reverse bridge';
# enlarge top and bottom surfaces
{
# get all external surfaces
my @top = grep $_->surface_type == S_TYPE_TOP, @{$self->fill_surfaces};
my @bottom = grep $_->surface_type == S_TYPE_BOTTOM, @{$self->fill_surfaces};
# offset the contour and intersect it with the internal surfaces to discover
# which of them has contact with our bridge
my @supporting_surfaces = ();
my ($contour_offset) = $expolygon->contour->offset(scale $self->infill_flow->spacing * sqrt(2));
foreach my $internal_surface (@internal_surfaces) {
my $intersection = intersection_ex([$contour_offset], [$internal_surface->p]);
if (@$intersection) {
push @supporting_surfaces, $internal_surface;
}
# offset them and intersect the results with the actual fill boundaries
my $margin = scale 3; # TODO: ensure this is greater than the total thickness of the perimeters
@top = @{intersection_ex(
[ Slic3r::Geometry::Clipper::offset([ map $_->p, @top ], +$margin) ],
[ map $_->p, @{$self->fill_surfaces} ],
undef,
1, # to ensure adjacent expolygons are unified
)};
@bottom = @{intersection_ex(
[ Slic3r::Geometry::Clipper::offset([ map $_->p, @bottom ], +$margin) ],
[ map $_->p, @{$self->fill_surfaces} ],
undef,
1, # to ensure adjacent expolygons are unified
)};
# give priority to bottom surfaces
@top = @{diff_ex(
[ map @$_, @top ],
[ map @$_, @bottom ],
)};
# generate new surfaces
my @new_surfaces = ();
push @new_surfaces, map Slic3r::Surface->new(
expolygon => $_,
surface_type => S_TYPE_TOP,
), @top;
push @new_surfaces, map Slic3r::Surface->new(
expolygon => $_,
surface_type => S_TYPE_BOTTOM,
), @bottom;
# subtract the new top surfaces from the other non-top surfaces and re-add them
my @other = grep $_->surface_type != S_TYPE_TOP && $_->surface_type != S_TYPE_BOTTOM, @{$self->fill_surfaces};
foreach my $group (Slic3r::Surface->group(@other)) {
push @new_surfaces, map Slic3r::Surface->new(
expolygon => $_,
surface_type => $group->[0]->surface_type,
), @{diff_ex(
[ map $_->p, @$group ],
[ map $_->p, @new_surfaces ],
)};
}
@{$self->fill_surfaces} = @new_surfaces;
}
# detect bridge direction (skip bottom layer)
if ($self->id > 0) {
my @bottom = grep $_->surface_type == S_TYPE_BOTTOM, @{$self->fill_surfaces}; # surfaces
my @lower = @{$self->layer->object->layers->[ $self->id - 1 ]->slices}; # expolygons
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output("bridge_surfaces.svg",
green_polygons => [ map $_->p, @supporting_surfaces ],
red_polygons => [ @$expolygon ],
);
}
Slic3r::debugf "Found $description on layer %d with %d support(s)\n",
$self->id, scalar(@supporting_surfaces);
next SURFACE unless @supporting_surfaces;
my $bridge_angle = undef;
if ($surface->surface_type == S_TYPE_BOTTOM) {
# detect optimal bridge angle
my $bridge_over_hole = 0;
my @edges = (); # edges are POLYLINES
foreach my $supporting_surface (@supporting_surfaces) {
my @surface_edges = map $_->clip_with_polygon($contour_offset),
($supporting_surface->contour, $supporting_surface->holes);
if (@supporting_surfaces == 1 && @surface_edges == 1
&& @{$supporting_surface->contour} == @{$surface_edges[0]}) {
$bridge_over_hole = 1;
foreach my $surface (@bottom) {
# detect what edges lie on lower slices
my @edges = (); # polylines
foreach my $lower (@lower) {
# turn bridge contour and holes into polylines and then clip them
# with each lower slice's contour
my @clipped = map $_->split_at_first_point->clip_with_polygon($lower->contour), @{$surface->expolygon};
if (@clipped == 2) {
# If the split_at_first_point() call above happens to split the polygon inside the clipping area
# we would get two consecutive polylines instead of a single one, so we use this ugly hack to
# recombine them back into a single one in order to trigger the @edges == 2 logic below.
# This needs to be replaced with something way better.
if (points_coincide($clipped[0][0], $clipped[-1][-1])) {
@clipped = (Slic3r::Polyline->new(@{$clipped[-1]}, @{$clipped[0]}));
}
if (points_coincide($clipped[-1][0], $clipped[0][-1])) {
@clipped = (Slic3r::Polyline->new(@{$clipped[0]}, @{$clipped[1]}));
}
}
push @edges, grep { @$_ } @surface_edges;
push @edges, @clipped;
}
Slic3r::debugf " Bridge is supported on %d edge(s)\n", scalar(@edges);
Slic3r::debugf " and covers a hole\n" if $bridge_over_hole;
Slic3r::debugf "Found bridge on layer %d with %d support(s)\n", $self->id, scalar(@edges);
next if !@edges;
my $bridge_angle = undef;
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output("bridge_edges.svg",
polylines => [ map $_->p, @edges ],
Slic3r::SVG::output("bridge.svg",
polygons => [ $surface->p ],
red_polygons => [ map @$_, @lower ],
polylines => [ @edges ],
);
}
@ -553,80 +581,8 @@ sub process_bridges {
Slic3r::debugf " Optimal infill angle of bridge on layer %d is %d degrees\n",
$self->id, $bridge_angle if defined $bridge_angle;
}
# now, extend our bridge by taking a portion of supporting surfaces
{
# offset the bridge by the specified amount of mm (minimum 3)
my $bridge_overlap = scale 3;
my ($bridge_offset) = $expolygon->contour->offset($bridge_overlap);
# calculate the new bridge
my $intersection = intersection_ex(
[ @$expolygon, map $_->p, @supporting_surfaces ],
[ $bridge_offset ],
);
push @bridges, map Slic3r::Surface->new(
expolygon => $_,
surface_type => $surface->surface_type,
bridge_angle => $bridge_angle,
), @$intersection;
}
}
# now we need to merge bridges to avoid overlapping
{
# build a list of unique bridge types
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
@bridges = ();
foreach my $surfaces (@surface_groups) {
my $union = union_ex([ map $_->p, @$surfaces ]);
my $diff = diff_ex(
[ map @$_, @$union ],
[ map $_->p, @bridges ],
);
push @bridges, map Slic3r::Surface->new(
expolygon => $_,
surface_type => $surfaces->[0]->surface_type,
bridge_angle => $surfaces->[0]->bridge_angle,
), @$union;
}
}
# apply bridges to layer
{
my @surfaces = @{$self->fill_surfaces};
@{$self->fill_surfaces} = ();
# intersect layer surfaces with bridges to get actual bridges
foreach my $bridge (@bridges) {
my $actual_bridge = intersection_ex(
[ map $_->p, @surfaces ],
[ $bridge->p ],
);
push @{$self->fill_surfaces}, map Slic3r::Surface->new(
expolygon => $_,
surface_type => $bridge->surface_type,
bridge_angle => $bridge->bridge_angle,
), @$actual_bridge;
}
# 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->fill_surfaces}, map Slic3r::Surface->new(
expolygon => $_,
surface_type => $group->[0]->surface_type), @$difference;
$surface->bridge_angle($bridge_angle);
}
}
}

4
lib/Slic3r/Polygon.pm
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@ -118,7 +118,7 @@ sub subdivide {
# returns false if the polyline is too tight to be printed
sub is_printable {
my $self = shift;
my ($flow) = @_;
my ($width) = @_;
# try to get an inwards offset
# for a distance equal to half of the extrusion width;
@ -129,7 +129,7 @@ sub is_printable {
# detect them and we would be discarding them.
my $p = $self->clone;
$p->make_counter_clockwise;
return $p->offset(-$flow->scaled_width / 2) ? 1 : 0;
return $p->offset(-$width / 2) ? 1 : 0;
}
sub is_valid {

5
lib/Slic3r/Print.pm
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@ -337,7 +337,8 @@ sub export_gcode {
for @{$layer->slices}, (map $_->expolygon, map @{$_->slices}, @{$layer->regions});
}
# this will transform $layer->fill_surfaces from expolygon
# this will assign a type (top/bottom/internal) to $layerm->slices
# and transform $layerm->fill_surfaces from expolygon
# to typed top/bottom/internal surfaces;
$status_cb->(30, "Detecting solid surfaces");
$_->detect_surfaces_type for @{$self->objects};
@ -349,7 +350,7 @@ sub export_gcode {
# this will detect bridges and reverse bridges
# and rearrange top/bottom/internal surfaces
$status_cb->(45, "Detect bridges");
$_->process_bridges for map @{$_->regions}, map @{$_->layers}, @{$self->objects};
$_->process_external_surfaces for map @{$_->regions}, map @{$_->layers}, @{$self->objects};
# detect which fill surfaces are near external layers
# they will be split in internal and internal-solid surfaces

25
lib/Slic3r/Print/Object.pm
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@ -300,7 +300,7 @@ sub detect_surfaces_type {
[ map @$_, @$clip_surfaces ],
1,
);
return grep $_->contour->is_printable($layerm->perimeter_flow),
return grep $_->contour->is_printable($layerm->perimeter_flow->scaled_width),
map Slic3r::Surface->new(expolygon => $_, surface_type => $result_type),
@$expolygons;
};
@ -515,7 +515,9 @@ sub discover_horizontal_shells {
foreach my $type (S_TYPE_TOP, S_TYPE_BOTTOM) {
# find slices of current type for current layer
my @surfaces = grep $_->surface_type == $type, @{$layerm->slices} or next;
# get both slices and fill_surfaces before the former contains the perimeters area
# and the latter contains the enlarged external surfaces
my @surfaces = grep $_->surface_type == $type, @{$layerm->slices}, @{$layerm->fill_surfaces} or next;
my $surfaces_p = [ map $_->p, @surfaces ];
Slic3r::debugf "Layer %d has %d surfaces of type '%s'\n",
$i, scalar(@surfaces), ($type == S_TYPE_TOP ? 'top' : 'bottom');
@ -548,7 +550,7 @@ sub discover_horizontal_shells {
( map @$_, @$new_internal_solid ),
]);
# subtract intersections from layer surfaces to get resulting inner surfaces
# subtract intersections from layer surfaces to get resulting internal surfaces
my $internal = diff_ex(
[ map $_->p, grep $_->surface_type == S_TYPE_INTERNAL, @neighbor_fill_surfaces ],
[ map @$_, @$internal_solid ],
@ -557,10 +559,7 @@ sub discover_horizontal_shells {
Slic3r::debugf " %d internal-solid and %d internal surfaces found\n",
scalar(@$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
# assign resulting internal surfaces to layer
my $neighbor_fill_surfaces = $self->layers->[$n]->regions->[$region_id]->fill_surfaces;
@$neighbor_fill_surfaces = ();
push @$neighbor_fill_surfaces, Slic3r::Surface->new
@ -586,17 +585,7 @@ sub discover_horizontal_shells {
}
}
my $area_threshold = $layerm->infill_area_threshold;
@{$layerm->fill_surfaces} = grep $_->expolygon->area > $area_threshold, @{$layerm->fill_surfaces};
}
for (my $i = 0; $i < $self->layer_count; $i++) {
my $layerm = $self->layers->[$i]->regions->[$region_id];
# if hollow object is requested, remove internal surfaces
if ($Slic3r::Config->fill_density == 0) {
@{$layerm->fill_surfaces} = grep $_->surface_type != S_TYPE_INTERNAL, @{$layerm->fill_surfaces};
}
@{$layerm->fill_surfaces} = grep $_->expolygon->area > $layerm->infill_area_threshold, @{$layerm->fill_surfaces};
}
}
}

4
lib/Slic3r/Surface.pm
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@ -35,8 +35,8 @@ sub new {
sub expolygon { $_[0][S_EXPOLYGON] }
sub surface_type { $_[0][S_SURFACE_TYPE] = $_[1] if defined $_[1]; $_[0][S_SURFACE_TYPE] }
sub depth_layers { $_[0][S_DEPTH_LAYERS] } # this integer represents the thickness of the surface expressed in layers
sub bridge_angle { $_[0][S_BRIDGE_ANGLE] }
sub additional_inner_perimeters { $_[0][S_ADDITIONAL_INNER_PERIMETERS] = $_[1] if $_[1]; $_[0][S_ADDITIONAL_INNER_PERIMETERS] }
sub bridge_angle { $_[0][S_BRIDGE_ANGLE] = $_[1] if defined $_[1]; $_[0][S_BRIDGE_ANGLE] }
sub additional_inner_perimeters { $_[0][S_ADDITIONAL_INNER_PERIMETERS] = $_[1] if defined $_[1]; $_[0][S_ADDITIONAL_INNER_PERIMETERS] }
# delegate handles
sub encloses_point { $_[0]->expolygon->encloses_point }

2
t/combineinfill.t
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@ -48,7 +48,7 @@ use Slic3r::Test;
}
$_->detect_surfaces_type for @{$self->objects};
$_->prepare_fill_surfaces for map @{$_->regions}, map @{$_->layers}, @{$self->objects};
$_->process_bridges for map @{$_->regions}, map @{$_->layers}, @{$self->objects};
$_->process_external_surfaces for map @{$_->regions}, map @{$_->layers}, @{$self->objects};
$_->discover_horizontal_shells for @{$self->objects};
$_->combine_infill for @{$self->objects};