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Bugfix: thin bridge anchors were ignored. #304

grow-support
Alessandro Ranellucci 2013-07-29 11:54:32 +02:00
parent 948b43fe0d
commit 1f36406a62
1 changed files with 5 additions and 2 deletions
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7
lib/Slic3r/Layer/Region.pm
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@ -419,8 +419,10 @@ sub process_external_surfaces {
# detect bridge direction before merging grown surfaces otherwise adjacent bridges
# would get merged into a single one while they need different directions
# also, supply the original expolygon instead of the grown one, because in case
# of very thin (but still working) anchors, the grown expolygon would go beyond them
my $angle = $self->id > 0
? $self->_detect_bridge_direction($grown)
? $self->_detect_bridge_direction($surface->expolygon)
: undef;
push @bottom, $surface->clone(expolygon => $grown, bridge_angle => $angle);
@ -470,6 +472,7 @@ sub _detect_bridge_direction {
my $self = shift;
my ($expolygon) = @_;
my ($grown) = $expolygon->offset_ex(+$self->perimeter_flow->scaled_width);
my @lower = @{$self->layer->object->layers->[ $self->id - 1 ]->slices}; # expolygons
# detect what edges lie on lower slices
@ -477,7 +480,7 @@ sub _detect_bridge_direction {
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), @$expolygon;
my @clipped = map $_->split_at_first_point->clip_with_polygon($lower->contour), @$grown;
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