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Some fixes to bridge direction detection. Includes regression tests

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This commit is contained in:
Alessandro Ranellucci 2014-04-08 14:51:55 +02:00
parent 23e6abff49
commit 9be57f750d
3 changed files with 89 additions and 47 deletions
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33
lib/Slic3r/Polygon.pm
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@ -8,6 +8,7 @@ use parent 'Slic3r::Polyline';
use Slic3r::Geometry qw(
polygon_segment_having_point
PI X1 X2 Y1 Y2 epsilon);
use Slic3r::Geometry::Clipper qw(intersection_pl);
sub wkt {
my $self = shift;
@ -50,4 +51,36 @@ sub concave_points {
-1 .. ($#points-1);
}
sub clip_as_polyline {
my ($self, $polygons) = @_;
my $self_pl = $self->split_at_first_point;
# Clipper will remove a polyline segment if first point coincides with last one.
# Until that bug is not fixed upstream, we move one of those points slightly.
$self_pl->[0]->translate(1, 0);
my @polylines = @{intersection_pl([$self_pl], $polygons)};
if (@polylines == 2) {
# If the split_at_first_point() call above happens to split the polygon inside the clipping area
# we would get two consecutive polylines instead of a single one, so we use this ugly hack to
# recombine them back into a single one in order to trigger the @edges == 2 logic below.
# This needs to be replaced with something way better.
if ($polylines[0][-1]->coincides_width($self_pl->[-1]) && $polylines[-1][0]->coincides_width($self_pl->[0])) {
my $p = $polylines[0]->clone;
$p->pop_back;
$p->append(@{$polylines[-1]});
return [$p];
}
if ($polylines[0][0]->coincides_width($self_pl->[0]) && $polylines[-1][-1]->coincides_width($self_pl->[-1])) {
my $p = $polylines[-1]->clone;
$p->pop_back;
$p->append(@{$polylines[0]});
return [$p];
}
}
return [ @polylines ];
}
1;