diff --git a/lib/Slic3r/Fill/Concentric.pm b/lib/Slic3r/Fill/Concentric.pm index 75dce8d23..10cc7aeb6 100644 --- a/lib/Slic3r/Fill/Concentric.pm +++ b/lib/Slic3r/Fill/Concentric.pm @@ -47,9 +47,10 @@ sub fill_surface { $last_pos = $paths[-1]->last_point; } - # clip the paths to avoid the extruder to get exactly on the first point of the loop + # clip the paths to prevent the extruder from getting exactly on the first point of the loop my $clip_length = scale $flow_spacing * &Slic3r::LOOP_CLIPPING_LENGTH_OVER_SPACING; $_->clip_end($clip_length) for @paths; + @paths = grep $_->is_valid, @paths; # remove empty paths (too short, thus eaten by clipping) # TODO: return ExtrusionLoop objects to get better chained paths return { flow_spacing => $flow_spacing, no_sort => 1 }, @paths;