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Avoid useless looping and usage of ExPolygons

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Alessandro Ranellucci 2013-05-11 09:35:33 +02:00
parent 6e216e2fd9
commit 0e100827f8
1 changed files with 9 additions and 10 deletions
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19
lib/Slic3r/Layer/Region.pm
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@ -4,7 +4,8 @@ use Moo;
use List::Util qw(sum first);
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(PI X1 X2 Y1 Y2 A B scale chained_path_items points_coincide);
use Slic3r::Geometry::Clipper qw(safety_offset union_ex diff_ex intersection_ex offset2_ex);
use Slic3r::Geometry::Clipper qw(safety_offset union_ex diff_ex intersection_ex
offset offset2_ex);
use Slic3r::Surface ':types';
has 'layer' => (
@ -225,18 +226,16 @@ sub make_perimeters {
$spacing /= 2 if $loop == 0;
# offsetting a polygon can result in one or many offset polygons
my @new_offsets = ();
foreach my $expolygon (@last_offsets) {
my @offsets = offset2_ex($expolygon, -1.5*$spacing, +0.5*$spacing);
push @new_offsets, @offsets;
# where the above check collapses the expolygon, then there's no room for an inner loop
# and we can extract the gap for later processing
my @new_offsets = offset2_ex([ map @$_, @last_offsets ], -1.5*$spacing, +0.5*$spacing);
# where the above check collapses the expolygon, then there's no room for an inner loop
# and we can extract the gap for later processing
{
my $diff = diff_ex(
[ map @$_, $expolygon->offset_ex(-0.5*$spacing) ],
[ offset([ map @$_, @last_offsets ], -0.5*$spacing) ],
# +2 on the offset here makes sure that Clipper float truncation
# won't shrink the clip polygon to be smaller than intended.
[ Slic3r::Geometry::Clipper::offset([map @$_, @offsets], +0.5*$spacing + 2) ],
[ offset([ map @$_, @new_offsets ], +0.5*$spacing + 2) ],
);
push @gaps, grep $_->area >= $gap_area_threshold, @$diff;
}