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Don't grow horizontal shells having acute angles. #1387

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This commit is contained in:
Alessandro Ranellucci 2013-09-06 17:43:40 +02:00
parent 9484c377d9
commit cb677c45de
3 changed files with 10 additions and 4 deletions
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9
lib/Slic3r/Print/Object.pm
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@ -5,7 +5,7 @@ use List::Util qw(min max sum first);
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(X Y Z PI scale unscale deg2rad rad2deg scaled_epsilon chained_path_points);
use Slic3r::Geometry::Clipper qw(diff diff_ex intersection intersection_ex union union_ex
offset offset_ex offset2);
offset offset_ex offset2 CLIPPER_OFFSET_SCALE JT_MITER);
use Slic3r::Surface ':types';
has 'print' => (is => 'ro', weak_ref => 1, required => 1);
@ -628,10 +628,15 @@ sub discover_horizontal_shells {
# make sure the new internal solid is wide enough, as it might get collapsed when
# spacing is added in Fill.pm
{
# we use a higher miterLimit here to handle areas with acute angles
# in those cases, the default miterLimit would cut the corner and we'd
# get a triangle in $too_narrow; if we grow it below then the shell
# would have a different shape from the external surface and we'd still
# have the same angle, so the next shell would be grown even more and so on.
my $margin = 3 * $layerm->solid_infill_flow->scaled_width; # require at least this size
my $too_narrow = diff_ex(
[ map @$_, @$new_internal_solid ],
offset2([ map @$_, @$new_internal_solid ], -$margin, +$margin),
offset2([ map @$_, @$new_internal_solid ], -$margin, +$margin, CLIPPER_OFFSET_SCALE, JT_MITER, 5),
1,
);