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Better pruning of thin walls to avoid unwanted extra extrusions. Includes regression test. #1794

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Conflicts:

	lib/Slic3r/Layer/Region.pm
This commit is contained in:
Alessandro Ranellucci 2014-03-02 00:28:10 +01:00
parent a344d68257
commit 2295d48947
4 changed files with 74 additions and 5 deletions
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20
lib/Slic3r/Layer/Region.pm
View file

@ -93,14 +93,14 @@ sub make_perimeters {
# the minimum thickness of a single loop is:
# width/2 + spacing/2 + spacing/2 + width/2
@offsets = @{offset2(\@last, -(0.5*$pwidth + 0.5*$pspacing - 1), +(0.5*$pspacing - 1))};
# look for thin walls
if ($self->config->thin_walls) {
my $diff = diff_ex(
\@last,
offset(\@offsets, +0.5*$pwidth),
);
push @thin_walls, grep abs($_->area) >= $gap_area_threshold, @$diff;
push @thin_walls, @$diff;
}
} else {
@offsets = @{offset2(\@last, -(1.5*$pspacing - 1), +(0.5*$pspacing - 1))};
@ -222,15 +222,29 @@ sub make_perimeters {
$self->perimeters->append(@loops);
# process thin walls by collapsing slices to single passes
my $min_thin_wall_width = $pwidth/3;
my $min_thin_wall_length = 2*$pwidth;
@thin_walls = @{offset2_ex([ map @$_, @thin_walls ], -0.5*$min_thin_wall_width, +0.5*$min_thin_wall_width)};
if (@thin_walls) {
if (0) {
require "Slic3r/SVG.pm";
Slic3r::SVG::output(
"thin_walls.svg",
no_arrows => 1,
expolygons => \@thin_walls,
red_polylines => [ map $_->polygon->split_at_first_point, @{$self->perimeters} ],
);
}
my @p = map $_->medial_axis($pspacing), @thin_walls;
my @paths = ();
for my $p (@p) {
next if $p->length <= $pspacing * 2;
next if $p->length < $min_thin_wall_length;
my %params = (
role => EXTR_ROLE_EXTERNAL_PERIMETER,
mm3_per_mm => $mm3_per_mm,
);
printf "len = %s\n", unscale($p->length);
push @paths, $p->isa('Slic3r::Polygon')
? Slic3r::ExtrusionLoop->new(polygon => $p, %params)
: Slic3r::ExtrusionPath->new(polyline => $p, %params);

4
lib/Slic3r/SVG.pm
View file

@ -50,7 +50,7 @@ sub output {
my $g = $svg->group(
style => {
'stroke-width' => 2,
'stroke-width' => 0,
'stroke' => $colour || 'black',
'fill' => ($type !~ /polygons/ ? 'none' : ($colour || 'grey')),
'fill-type' => $filltype,
@ -68,7 +68,7 @@ sub output {
my $g = $svg->group(
style => {
'stroke-width' => 2,
'stroke-width' => ($method eq 'polyline') ? 1 : 0,
'stroke' => $colour || 'black',
'fill' => ($type !~ /polygons/ ? 'none' : ($colour || 'grey')),
},

7
lib/Slic3r/Test.pm
View file

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