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Smarter ordering of brim loops. #687

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This commit is contained in:
Alessandro Ranellucci 2013-05-09 14:52:56 +02:00
parent 855ba90332
commit 4aad2f6243
2 changed files with 39 additions and 8 deletions
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37
lib/Slic3r/Print.pm
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@ -6,8 +6,8 @@ use File::Spec;
use List::Util qw(max first);
use Math::ConvexHull::MonotoneChain qw(convex_hull);
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(X Y Z X1 Y1 X2 Y2 MIN PI scale unscale move_points nearest_point);
use Slic3r::Geometry::Clipper qw(diff_ex union_ex intersection_ex offset JT_ROUND JT_SQUARE);
use Slic3r::Geometry qw(X Y Z X1 Y1 X2 Y2 MIN PI scale unscale move_points nearest_point chained_path_items);
use Slic3r::Geometry::Clipper qw(diff_ex union_ex union_pt intersection_ex offset JT_ROUND JT_SQUARE PFT_EVENODD);
use Time::HiRes qw(gettimeofday tv_interval);
has 'config' => (is => 'rw', default => sub { Slic3r::Config->new_from_defaults }, trigger => 1);
@ -673,16 +673,39 @@ sub make_brim {
push @islands, map $_->unpack->split_at_first_point->polyline->grow($grow_distance), @{$self->skirt};
}
my @loops = ();
my $num_loops = sprintf "%.0f", $Slic3r::Config->brim_width / $flow->width;
for my $i (reverse 1 .. $num_loops) {
# JT_SQUARE ensures no vertex is outside the given offset distance
push @{$self->brim}, Slic3r::ExtrusionLoop->pack(
polygon => Slic3r::Polygon->new($_),
role => EXTR_ROLE_SKIRT,
flow_spacing => $flow->spacing,
) for Slic3r::Geometry::Clipper::offset(\@islands, ($i - 0.5) * $flow->scaled_spacing, undef, JT_SQUARE); # -0.5 because islands are not represented by their centerlines
# -0.5 because islands are not represented by their centerlines
# TODO: we need the offset inwards/offset outwards logic to avoid overlapping extrusions
push @loops, offset(\@islands, ($i - 0.5) * $flow->scaled_spacing, undef, JT_SQUARE);
}
# prepare a subroutine to traverse the tree and return inner perimeters first
my $traverse;
$traverse = sub {
my ($loops) = @_;
# use a nearest neighbor search to order these children
# TODO: supply second argument to chained_path_items() too?
@$loops = @{chained_path_items(
[ map [ ($_->{outer} ? $_->{outer}[0] : $_->{hole}[0]), $_ ], @$loops ],
)};
my @polygons = ();
foreach my $loop (@$loops) {
push @polygons, $traverse->($loop->{children});
push @polygons, Slic3r::ExtrusionLoop->pack(
polygon => Slic3r::Polygon->new($loop->{outer} // [ reverse @{$loop->{hole}} ]),
role => EXTR_ROLE_SKIRT,
flow_spacing => $flow->spacing,
);
}
return @polygons;
};
@{$self->brim} = reverse $traverse->( union_pt(\@loops, PFT_EVENODD) );
}
sub write_gcode {