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Remove features that are too small to be printed

degen-loop-screen
Alessandro Ranellucci 2011-09-26 11:59:06 +02:00
parent 081f65852d
commit c2a62891da
3 changed files with 28 additions and 2 deletions
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19
lib/Slic3r/Layer.pm
View File

@ -304,4 +304,23 @@ sub merge_contiguous_surfaces {
}
}
sub remove_small_features {
my $self = shift;
# for each perimeter, try to get an inwards offset
# for a distance equal to half of the extrusion width;
# if no offset is possible, then feature is not printable
my @good_perimeters = ();
foreach my $loop (@{$self->perimeters}) {
my $p = $loop->p;
@$p = reverse @$p if !is_counter_clockwise($p);
my $offsets = offset([$p], -($Slic3r::flow_width / 2 / $Slic3r::resolution), 100, JT_MITER, 2);
push @good_perimeters, $loop if @$offsets;
}
Slic3r::debugf "removed %d unprintable perimeters\n", (@{$self->perimeters} - @good_perimeters)
if @good_perimeters != @{$self->perimeters};
@{$self->perimeters} = @good_perimeters;
}
1;

10
lib/Slic3r/Print.pm
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@ -91,8 +91,7 @@ sub discover_horizontal_shells {
$clipper->clear;
# Note: due to floating point math we're going to get some very small
# polygons as $internal_polygons; they should be discarded, but a reliable
# way to detect them is needed, and they seem to be harmless so we keep them for now
# polygons as $internal_polygons; they will be removed by removed_small_features()
# assign resulting inner surfaces to layer
$self->layers->[$n]->surfaces([]);
@ -121,6 +120,13 @@ sub discover_horizontal_shells {
}
}
# remove perimeters and fill surfaces which are too small to be extruded
sub remove_small_features {
my $self = shift;
$_->remove_small_features for @{$self->layers};
}
sub extrude_perimeters {
my $self = shift;

1
slic3r.pl
View File

@ -103,6 +103,7 @@ if ($action eq 'skein') {
my $t0 = [gettimeofday];
my $print = $stl_parser->parse_file($input_file);
$print->extrude_perimeters;
$print->remove_small_features;
$print->extrude_fills;
my $output_file = $input_file;