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Debugging environment for issue #1834 about Clipper returning wrong diff results

issue1834
Alessandro Ranellucci 2014-03-24 21:26:04 +01:00
parent 5ce4de0544
commit c842133523
2 changed files with 22 additions and 2 deletions
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22
lib/Slic3r/GCode.pm
View File

@ -246,8 +246,25 @@ sub extrude_loop {
# get non-overhang paths by subtracting overhangs from the loop
push @paths,
map $_->clone,
@{$extrusion_path->subtract_expolygons($self->_layer_overhangs)};
@{$extrusion_path->subtract_expolygons(Slic3r::ExPolygon::Collection->new || $self->_layer_overhangs)};
if (@paths == 1) {
if ($paths[0]->polyline->length != $extrusion_path->polyline->length) {
use XXX; YYY (
$extrusion_path->polyline->wkt,
$paths[0]->polyline->wkt,
);
use Slic3r::SVG;
Slic3r::SVG::output("path.svg",
red_polylines => [ $extrusion_path->polyline ],
polylines => [ $paths[0]->polyline ],
);
exit;
}
}
if (0) {
# get overhang paths by intersecting overhangs with the loop
foreach my $path (@{$extrusion_path->intersect_expolygons($self->_layer_overhangs)}) {
$path = $path->clone;
@ -255,11 +272,12 @@ sub extrude_loop {
$path->mm3_per_mm($self->region->flow(FLOW_ROLE_PERIMETER, -1, 1)->mm3_per_mm(-1));
push @paths, $path;
}
}
# reapply the nearest point search for starting point
# (clone because the collection gets DESTROY'ed)
my $collection = Slic3r::ExtrusionPath::Collection->new(@paths);
@paths = map $_->clone, @{$collection->chained_path_from($start_at, 1)};
#@paths = map $_->clone, @{$collection->chained_path_from($start_at, 1)};
} else {
push @paths, $extrusion_path;
}

2
xs/src/ClipperUtils.cpp
View File

@ -370,6 +370,8 @@ template void diff<Slic3r::Polygons>(const Slic3r::Polygons &subject, const Slic
void diff(const Slic3r::Polylines &subject, const Slic3r::Polygons &clip, Slic3r::Polylines &retval)
{
_clipper(ClipperLib::ctDifference, subject, clip, retval);
printf("polylines = %zu, polygons = %zu, return polylines = %zu\n",
subject.size(), clip.size(), retval.size());
}
template <class T>