Fix integration of XS containers

34 files changed, 272 insertions, 145 deletions

diff --git a/lib/Slic3r/ExPolygon.pm b/lib/Slic3r/ExPolygon.pm
index 1fcdb00d9..0f1c3189b 100644
--- a/lib/Slic3r/ExPolygon.pm
+++ b/lib/Slic3r/ExPolygon.pm
@@ -87,9 +87,9 @@ sub encloses_line {
     my $clip = $self->clip_line($line);
     if (!defined $tolerance) {
         # optimization
-        return @$clip == 1 && same_line($clip->[0], $line);
+        return @$clip == 1 && same_line($clip->[0]->pp, $line->pp);
     } else {
-        return @$clip == 1 && abs(Boost::Geometry::Utils::linestring_length($clip->[0]) - $line->length) < $tolerance;
+        return @$clip == 1 && abs(Boost::Geometry::Utils::linestring_length($clip->[0]->pp) - $line->length) < $tolerance;
     }
 }
 
@@ -102,7 +102,10 @@ sub clip_line {
     my $self = shift;
     my ($line) = @_;  # line must be a Slic3r::Line object
     
-    return Boost::Geometry::Utils::polygon_multi_linestring_intersection($self->pp, [$line->pp]);
+    return [
+        map Slic3r::Line->new(@$_),
+            @{Boost::Geometry::Utils::polygon_multi_linestring_intersection($self->pp, [$line->pp])}
+    ];
 }
 
 sub simplify {
diff --git a/lib/Slic3r/ExtrusionLoop.pm b/lib/Slic3r/ExtrusionLoop.pm
index 4298d0e0b..4fb5ce79c 100644
--- a/lib/Slic3r/ExtrusionLoop.pm
+++ b/lib/Slic3r/ExtrusionLoop.pm
@@ -18,4 +18,13 @@ sub first_point {
     return $self->polygon->[0];
 }
 
+sub make_counter_clockwise {
+    my $self = shift;
+    if (!$self->polygon->is_counter_clockwise) {
+        $self->reverse;
+        return 1;
+    }
+    return 0;
+}
+
 1;
diff --git a/lib/Slic3r/ExtrusionPath.pm b/lib/Slic3r/ExtrusionPath.pm
index facddd614..5446736f6 100644
--- a/lib/Slic3r/ExtrusionPath.pm
+++ b/lib/Slic3r/ExtrusionPath.pm
@@ -32,7 +32,7 @@ sub intersect_expolygons {
     my ($expolygons) = @_;
     
     return map $self->clone(polyline => Slic3r::Polyline->new(@$_)),
-        @{Boost::Geometry::Utils::multi_polygon_multi_linestring_intersection($expolygons, [$self->arrayref])};
+        @{Boost::Geometry::Utils::multi_polygon_multi_linestring_intersection([ map $_->pp, @$expolygons ], [$self->pp])};
 }
 
 sub subtract_expolygons {
@@ -40,12 +40,24 @@ sub subtract_expolygons {
     my ($expolygons) = @_;
     
     return map $self->clone(polyline => Slic3r::Polyline->new(@$_)),
-        @{Boost::Geometry::Utils::multi_linestring_multi_polygon_difference([$self->arrayref], $expolygons)};
+        @{Boost::Geometry::Utils::multi_linestring_multi_polygon_difference([$self->pp], [ map $_->pp, @$expolygons ])};
 }
 
 sub simplify {
     my $self = shift;
-    $self->set_polyline($self->polyline->simplify(@_));
+    $self->polyline($self->polyline->simplify(@_));
+}
+
+sub clip_end {
+    my $self = shift;
+    my $polyline = $self->polyline;
+    $polyline->clip_end(@_);
+    $self->polyline($polyline);
+}
+
+sub length {
+    my $self = shift;
+    return $self->polyline->length;
 }
 
 sub points {
diff --git a/lib/Slic3r/ExtrusionPath/Arc.pm b/lib/Slic3r/ExtrusionPath/Arc.pm
index 05596f185..330d84543 100644
--- a/lib/Slic3r/ExtrusionPath/Arc.pm
+++ b/lib/Slic3r/ExtrusionPath/Arc.pm
@@ -1,14 +1,21 @@
 package Slic3r::ExtrusionPath::Arc;
 use Moo;
 
-extends 'Slic3r::ExtrusionPath';
-
+has 'polyline'      => (is => 'rw', required => 1);
+has 'role'          => (is => 'rw', required => 1);
+has 'height'        => (is => 'rw');
+has 'flow_spacing'  => (is => 'rw');
 has 'center' => (is => 'ro', required => 1);
 has 'radius' => (is => 'ro', required => 1);
 has 'orientation' => (is => 'ro', required => 1);  # cw/ccw
 
 use Slic3r::Geometry qw(PI angle3points);
 
+sub points {
+    my $self = shift;
+    return $self->polyline;
+}
+
 sub angle {
     my $self = shift;
     return angle3points($self->center, @{$self->points});
diff --git a/lib/Slic3r/ExtrusionPath/Collection.pm b/lib/Slic3r/ExtrusionPath/Collection.pm
index faee94af8..bb81381d6 100644
--- a/lib/Slic3r/ExtrusionPath/Collection.pm
+++ b/lib/Slic3r/ExtrusionPath/Collection.pm
@@ -12,21 +12,35 @@ sub first_point {
     return $self->paths->[0]->polyline->[0];
 }
 
+# Note that our paths will be reversed in place when necessary.
+# (Same algorithm as Polyline::Collection)
 sub chained_path {
     my $self = shift;
     my ($start_near, $no_reverse) = @_;
     
     return @{$self->paths} if $self->no_sort;
+    my @my_paths = @{$self->paths};
     
-    # make sure we pass the same path objects to the Collection constructor
-    # and the ->chained_path() method because the latter will reverse the
-    # paths in-place when needed and we need to return them that way
-    my @paths = @{$self->paths};
-    my $collection = Slic3r::Polyline::Collection->new(
-        polylines => [ map $_->polyline, @paths ],
-    );
-    
-    return $collection->chained_path($start_near, \@paths, $no_reverse);
+    my @paths = ();
+    my $start_at;
+    my $endpoints = $no_reverse
+        ? [ map { @$_[0,0] }  @my_paths ]
+        : [ map { @$_[0,-1] } @my_paths ];
+    while (@my_paths) {
+        # find nearest point
+        my $start_index = defined $start_near
+            ? Slic3r::Geometry::nearest_point_index($start_near, $endpoints)
+            : 0;
+
+        my $path_index = int($start_index/2);
+        if ($start_index % 2 && !$no_reverse) { # index is end so reverse to make it the start
+            $my_paths[$path_index]->reverse;
+        }
+        push @paths, splice @my_paths, $path_index, 1;
+        splice @$endpoints, $path_index*2, 2;
+        $start_near = $paths[-1][-1];
+    }
+    return @paths;
 }
 
 sub cleanup {
diff --git a/lib/Slic3r/Fill.pm b/lib/Slic3r/Fill.pm
index 18ad6d6f0..b31032c9d 100644
--- a/lib/Slic3r/Fill.pm
+++ b/lib/Slic3r/Fill.pm
@@ -157,24 +157,20 @@ sub make_fill {
             next SURFACE unless $density > 0;
         }
         
-        my @paths;
-        {
-            my $f = $self->filler($filler);
-            $f->layer_id($layerm->id);
-            @paths = $f->fill_surface(
-                $surface,
-                density         => $density,
-                flow_spacing    => $flow_spacing,
-                dont_adjust     => $is_bridge,
-            );
-        }
-        my $params = shift @paths;
+        my $f = $self->filler($filler);
+        $f->layer_id($layerm->id);
+        my ($params, @polylines) = $f->fill_surface(
+            $surface,
+            density         => $density,
+            flow_spacing    => $flow_spacing,
+            dont_adjust     => $is_bridge,
+        );
+        next unless @polylines;
         
         # ugly hack(tm) to get the right amount of flow (GCode.pm should be fixed)
         $params->{flow_spacing} = $layerm->extruders->{infill}->bridge_flow->width if $is_bridge;
         
         # save into layer
-        next unless @paths;
         push @fills, Slic3r::ExtrusionPath::Collection->new(
             no_sort => $params->{no_sort},
             paths => [
@@ -189,10 +185,10 @@ sub make_fill {
                                 : EXTR_ROLE_FILL),
                     height => $surface->thickness,
                     flow_spacing => $params->{flow_spacing} || (warn "Warning: no flow_spacing was returned by the infill engine, please report this to the developer\n"),
-                ), @paths,
+                ), @polylines,
             ],
         );
-        push @fills_ordering_points, $paths[0][0];
+        push @fills_ordering_points, $polylines[0][0];
     }
     
     # add thin fill regions
diff --git a/lib/Slic3r/Fill/Base.pm b/lib/Slic3r/Fill/Base.pm
index d0c9d4f30..e63ce8843 100644
--- a/lib/Slic3r/Fill/Base.pm
+++ b/lib/Slic3r/Fill/Base.pm
@@ -52,8 +52,8 @@ sub rotate_points_back {
     my @rotate = (-$rotate_vector->[0][0], $rotate_vector->[0][1]);
     my $shift  = [ map -$_, @{$rotate_vector->[1]} ];
     
-    @$paths = map [ Slic3r::Geometry::rotate_points(@rotate, @$_) ], 
-        map [ Slic3r::Geometry::move_points($shift, @$_) ], @$paths;
+    $_->translate(@$shift) for @$paths;
+    $_->rotate(@rotate) for @$paths;
 }
 
 sub adjust_solid_spacing {
diff --git a/lib/Slic3r/Fill/Honeycomb.pm b/lib/Slic3r/Fill/Honeycomb.pm
index 2ead45721..3db4a5c42 100644
--- a/lib/Slic3r/Fill/Honeycomb.pm
+++ b/lib/Slic3r/Fill/Honeycomb.pm
@@ -91,7 +91,7 @@ sub fill_surface {
         @paths = map Slic3r::Polyline->new(@$_),
             @{ Boost::Geometry::Utils::polygon_multi_linestring_intersection(
                 $surface->expolygon->pp,
-                \@polygons,
+                [ map $_->pp, @polygons ],
             ) };
         
         # connect paths
@@ -104,7 +104,7 @@ sub fill_surface {
                     my $distance = $paths[-1][-1]->distance_to($path->[0]);
                     
                     if ($distance <= $m->{hex_width}) {
-                        push @{$paths[-1]}, @$path;
+                        $paths[-1]->append(@$path);
                         next;
                     }
                 }
@@ -115,8 +115,8 @@ sub fill_surface {
         # clip paths again to prevent connection segments from crossing the expolygon boundaries
         @paths = map Slic3r::Polyline->new(@$_),
             @{ Boost::Geometry::Utils::multi_polygon_multi_linestring_intersection(
-                [ map $_->arrayref, $surface->expolygon->offset_ex(scaled_epsilon) ],
-                [ @paths ],
+                [ map $_->pp, $surface->expolygon->offset_ex(scaled_epsilon) ],
+                [ map $_->pp, @paths ],
             ) } if @paths;  # this temporary check is a workaround for the multilinestring bug in B::G::U
     }
     
diff --git a/lib/Slic3r/Fill/Rectilinear.pm b/lib/Slic3r/Fill/Rectilinear.pm
index 54998cb40..d35f2d383 100644
--- a/lib/Slic3r/Fill/Rectilinear.pm
+++ b/lib/Slic3r/Fill/Rectilinear.pm
@@ -65,17 +65,18 @@ sub fill_surface {
     
     # clip paths against a slightly offsetted expolygon, so that the first and last paths
     # are kept even if the expolygon has vertical sides
-    my @paths = @{ Boost::Geometry::Utils::polygon_multi_linestring_intersection(
-        +($expolygon->offset_ex(scaled_epsilon))[0]->pp,  # TODO: we should use all the resulting expolygons and clip the linestrings to a multipolygon object
-        [ map $_->pp, @{ $self->cache->{$cache_id} } ],
-    ) };
+    my @polylines = map Slic3r::Polyline->new(@$_),
+        @{ Boost::Geometry::Utils::multi_polygon_multi_linestring_intersection(
+            [ map $_->pp, $expolygon->offset_ex(scaled_epsilon) ],
+            [ map $_->pp, @{ $self->cache->{$cache_id} } ],
+        ) };
     
     # connect lines
     unless ($params{dont_connect}) {
         my $collection = Slic3r::Polyline::Collection->new(
-            polylines => [ map Slic3r::Polyline->new(@$_), @paths ],
+            polylines => [ @polylines ],
         );
-        @paths = ();
+        @polylines = ();
         
         my $tolerance = 10 * scaled_epsilon;
         my $diagonal_distance = $distance_between_lines * 2;
@@ -86,26 +87,26 @@ sub fill_surface {
             }
             : sub { $_[X] <= $diagonal_distance && $_[Y] <= $diagonal_distance };
         
-        foreach my $path ($collection->chained_path) {
-            if (@paths) {
-                my @distance = map abs($path->[0][$_] - $paths[-1][-1][$_]), (X,Y);
+        foreach my $polyline ($collection->chained_path) {
+            if (@polylines) {
+                my $last_point = $polylines[-1][-1]->pp;
+                my @distance = map abs($polyline->[0][$_] - $last_point->[$_]), (X,Y);
                 
                 # TODO: we should also check that both points are on a fill_boundary to avoid 
                 # connecting paths on the boundaries of internal regions
-                if ($can_connect->(@distance)
-                    && $expolygon_off->encloses_line(Slic3r::Line->new($paths[-1][-1], $path->[0]), $tolerance)) {
-                    push @{$paths[-1]}, @$path;
+                if ($can_connect->(@distance) && $expolygon_off->encloses_line(Slic3r::Line->new($last_point, $polyline->[0]), $tolerance)) {
+                    $polylines[-1]->append(@$polyline);
                     next;
                 }
             }
-            push @paths, $path;
+            push @polylines, $polyline;
         }
     }
     
     # paths must be rotated back
-    $self->rotate_points_back(\@paths, $rotate_vector);
+    $self->rotate_points_back(\@polylines, $rotate_vector);
     
-    return { flow_spacing => $flow_spacing }, @paths;
+    return { flow_spacing => $flow_spacing }, @polylines;
 }
 
 1;
diff --git a/lib/Slic3r/GCode.pm b/lib/Slic3r/GCode.pm
index aefb703b1..0b601fc2a 100644
--- a/lib/Slic3r/GCode.pm
+++ b/lib/Slic3r/GCode.pm
@@ -100,7 +100,7 @@ sub change_layer {
     # avoid computing overhangs if they're not needed
     $self->_layer_overhangs(
         $layer->id > 0 && ($Slic3r::Config->overhangs || $Slic3r::Config->start_perimeters_at_non_overhang)
-            ? [ map $_->expolygon->arrayref, grep $_->surface_type == S_TYPE_BOTTOM, map @{$_->slices}, @{$layer->regions} ]
+            ? [ map $_->expolygon, grep $_->surface_type == S_TYPE_BOTTOM, map @{$_->slices}, @{$layer->regions} ]
             : []
         );
     if ($self->config->avoid_crossing_perimeters) {
@@ -152,8 +152,8 @@ sub extrude_loop {
     my ($loop, $description) = @_;
     
     # extrude all loops ccw
+    my $was_clockwise = $loop->make_counter_clockwise;
     my $polygon = $loop->polygon;
-    my $was_clockwise = $polygon->make_counter_clockwise;
     
     # find candidate starting points
     # start looking for concave vertices not being overhangs
@@ -310,8 +310,8 @@ sub extrude_path {
             $path->center, $e * unscale $path_length, $description);
         $self->wipe_path(undef);
     } else {
-        foreach my $line ($path->lines) {
-            my $line_length = unscale $line->length;
+        foreach my $line (@{$path->lines}) {
+            my $line_length = unscale($line->length);
             $path_length += $line_length;
             $gcode .= $self->G1($line->[B], undef, $e * $line_length, $description);
         }
@@ -341,8 +341,7 @@ sub travel_to {
     my ($point, $role, $comment) = @_;
     
     my $gcode = "";
-    
-    my $travel = Slic3r::Line->new($self->last_pos->clone, $point->clone);
+    my $travel = Slic3r::Line->new($self->last_pos, $point);
     
     # move travel back to original layer coordinates for the island check.
     # note that we're only considering the current object's islands, while we should
diff --git a/lib/Slic3r/GCode/Reader.pm b/lib/Slic3r/GCode/Reader.pm
index 20a1313b0..ed3bdb73b 100644
--- a/lib/Slic3r/GCode/Reader.pm
+++ b/lib/Slic3r/GCode/Reader.pm
@@ -37,7 +37,7 @@ sub parse {
                     $info{"new_$axis"}  = $self->$axis;
                 }
             }
-            $info{dist_XY} = Slic3r::Line->new([0,0], [@info{qw(dist_X dist_Y)}])->length;
+            $info{dist_XY} = Slic3r::Geometry::unscale(Slic3r::Line->new_scale([0,0], [@info{qw(dist_X dist_Y)}])->length);
             if (exists $args{E}) {
                 if ($info{dist_E} > 0) {
                     $info{extruding} = 1;
diff --git a/lib/Slic3r/Geometry.pm b/lib/Slic3r/Geometry.pm
index 24856782a..6a54fa55d 100644
--- a/lib/Slic3r/Geometry.pm
+++ b/lib/Slic3r/Geometry.pm
@@ -195,21 +195,22 @@ sub point_in_segment {
     my ($point, $line) = @_;
     
     my ($x, $y) = @$point;
-    my @line_x = sort { $a <=> $b } $line->[A][X], $line->[B][X];
-    my @line_y = sort { $a <=> $b } $line->[A][Y], $line->[B][Y];
+    my $line_p = $line->pp;
+    my @line_x = sort { $a <=> $b } $line_p->[A][X], $line_p->[B][X];
+    my @line_y = sort { $a <=> $b } $line_p->[A][Y], $line_p->[B][Y];
     
     # check whether the point is in the segment bounding box
     return 0 unless $x >= ($line_x[0] - epsilon) && $x <= ($line_x[1] + epsilon)
         && $y >= ($line_y[0] - epsilon) && $y <= ($line_y[1] + epsilon);
     
     # if line is vertical, check whether point's X is the same as the line
-    if ($line->[A][X] == $line->[B][X]) {
-        return abs($x - $line->[A][X]) < epsilon ? 1 : 0;
+    if ($line_p->[A][X] == $line_p->[B][X]) {
+        return abs($x - $line_p->[A][X]) < epsilon ? 1 : 0;
     }
     
     # calculate the Y in line at X of the point
-    my $y3 = $line->[A][Y] + ($line->[B][Y] - $line->[A][Y])
-        * ($x - $line->[A][X]) / ($line->[B][X] - $line->[A][X]);
+    my $y3 = $line_p->[A][Y] + ($line_p->[B][Y] - $line_p->[A][Y])
+        * ($x - $line_p->[A][X]) / ($line_p->[B][X] - $line_p->[A][X]);
     return abs($y3 - $y) < epsilon ? 1 : 0;
 }
 
@@ -249,19 +250,19 @@ sub nearest_point_index {
     my ($point, $points) = @_;
     
     my ($nearest_point_index, $distance) = ();
-
-    my $point_x = $point->[X];
-    my $point_y = $point->[Y];
-
+    
+    my ($point_x, $point_y) = @$point;
+    my @points_pp = map $_->pp, @$points;
+    
     for my $i (0..$#$points) {
-        my $d = ($point_x - $points->[$i]->[X])**2;
+        my $d = ($point_x - $points_pp[$i][X])**2;
         # If the X distance of the candidate is > than the total distance of the
         # best previous candidate, we know we don't want it
         next if (defined $distance && $d > $distance);
    
         # If the total distance of the candidate is > than the total distance of the
         # best previous candidate, we know we don't want it
-        $d += ($point_y - $points->[$i]->[Y])**2;
+        $d += ($point_y - $points_pp[$i][Y])**2;
         next if (defined $distance && $d > $distance);
 
         $nearest_point_index = $i;
@@ -286,14 +287,14 @@ sub point_along_segment {
         }
     }
     
-    return $point;
+    return Slic3r::Point->new(@$point);
 }
 
 # given a $polygon, return the (first) segment having $point
 sub polygon_segment_having_point {
     my ($polygon, $point) = @_;
     
-    foreach my $line (polygon_lines($polygon)) {
+    foreach my $line (@{ $polygon->lines }) {
         return $line if point_in_segment($point, $line);
     }
     return undef;
diff --git a/lib/Slic3r/Geometry/Clipper.pm b/lib/Slic3r/Geometry/Clipper.pm
index 02ec5c557..006a4130c 100644
--- a/lib/Slic3r/Geometry/Clipper.pm
+++ b/lib/Slic3r/Geometry/Clipper.pm
@@ -181,7 +181,7 @@ sub traverse_pt {
 sub _convert {
     my $p = shift;
     $p = $p->pp if ref($p) ne 'ARRAY' && $p->can('pp');
-    return [ map { ref($_) ne 'ARRAY' && $_->can('pp') ? $_->pp : $_ } @$p ];
+    return [ map { (ref($_) ne 'ARRAY' && $_->can('pp')) ? $_->pp : $_ } @$p ];
 }
 
 1;
diff --git a/lib/Slic3r/Layer/Region.pm b/lib/Slic3r/Layer/Region.pm
index 64b6758d0..9e635854b 100644
--- a/lib/Slic3r/Layer/Region.pm
+++ b/lib/Slic3r/Layer/Region.pm
@@ -31,8 +31,7 @@ has 'slices' => (is => 'rw', default => sub { Slic3r::Surface::Collection->new }
 # in the original geometry
 has 'thin_walls' => (is => 'rw', default => sub { [] });
 
-# collection of polygons or polylines representing thin infill regions that
-# need to be filled with a medial axis
+# collection of extrusion paths/loops filling gaps
 has 'thin_fills' => (is => 'rw', default => sub { [] });
 
 # collection of surfaces for infill generation
@@ -234,7 +233,7 @@ sub make_perimeters {
         # use a nearest neighbor search to order these children
         # TODO: supply second argument to chained_path_items() too?
         my @nodes = @{Slic3r::Geometry::chained_path_items(
-            [ map [ ($_->{outer} ? $_->{outer}[0] : $_->{hole}[0]), $_ ], @$polynodes ],
+            [ map [ Slic3r::Point->new(@{$_->{outer} ? $_->{outer}[0] : $_->{hole}[0]}), $_ ], @$polynodes ],
         )};
         
         my @loops = ();
diff --git a/lib/Slic3r/Point.pm b/lib/Slic3r/Point.pm
index 0f7354e29..0a3d7ec02 100644
--- a/lib/Slic3r/Point.pm
+++ b/lib/Slic3r/Point.pm
@@ -2,6 +2,11 @@ package Slic3r::Point;
 use strict;
 use warnings;
 
+sub new_scale {
+    my $class = shift;
+    return $class->new(map Slic3r::Geometry::scale($_), @_);
+}
+
 sub distance_to {
     my $self = shift;
     my ($point) = @_;
diff --git a/lib/Slic3r/Polygon.pm b/lib/Slic3r/Polygon.pm
index 33e4da409..497daee0d 100644
--- a/lib/Slic3r/Polygon.pm
+++ b/lib/Slic3r/Polygon.pm
@@ -54,7 +54,7 @@ sub remove_acute_vertices {
 sub encloses_point {
     my $self = shift;
     my ($point) = @_;
-    return Boost::Geometry::Utils::point_covered_by_polygon($point->arrayref, [$self->pp]);
+    return Boost::Geometry::Utils::point_covered_by_polygon($point->pp, [$self->pp]);
 }
 
 sub area {
@@ -138,9 +138,10 @@ sub split_at {
 sub concave_points {
     my $self = shift;
     
+    my @points = @{$self->pp};
     return map $self->[$_],
-        grep Slic3r::Geometry::angle3points(@$self[$_, $_-1, $_+1]) < PI - epsilon,
-        -1 .. ($#$self-1);
+        grep Slic3r::Geometry::angle3points(@points[$_, $_-1, $_+1]) < PI - epsilon,
+        -1 .. ($#points-1);
 }
 
 1;
\ No newline at end of file
diff --git a/lib/Slic3r/Polyline.pm b/lib/Slic3r/Polyline.pm
index 637c39b42..e98fbc8d2 100644
--- a/lib/Slic3r/Polyline.pm
+++ b/lib/Slic3r/Polyline.pm
@@ -6,6 +6,12 @@ use Slic3r::Geometry qw(A B X Y X1 X2 Y1 Y2 polyline_remove_parallel_continuous_
 use Slic3r::Geometry::Clipper qw(JT_SQUARE);
 use Storable qw();
 
+sub new_scale {
+    my $class = shift;
+    my @points = map { ref($_) eq 'Slic3r::Point' ? $_->pp : $_ } @_;
+    return $class->new(map [ Slic3r::Geometry::scale($_->[X]), Slic3r::Geometry::scale($_->[Y]) ], @points);
+}
+
 sub wkt {
     my $self = shift;
     return sprintf "LINESTRING((%s))", join ',', map "$_->[0] $_->[1]", @$self;
@@ -39,9 +45,10 @@ sub grow {
     my ($distance, $scale, $joinType, $miterLimit) = @_;
     $joinType //= JT_SQUARE;
     
+    my @points = @$self;
     return map Slic3r::Polygon->new(@$_),
         Slic3r::Geometry::Clipper::offset(
-            [ [ @$self, CORE::reverse @$self[1..($#$self-1)] ] ],
+            [ Slic3r::Polygon->new(@points, CORE::reverse @points[1..($#points-1)]) ],
             $distance, $scale, $joinType, $miterLimit,
         );
 }
@@ -72,7 +79,7 @@ sub clip_with_expolygon {
     my ($expolygon) = @_;
     
     my $result = Boost::Geometry::Utils::polygon_multi_linestring_intersection($expolygon->pp, [$self->pp]);
-    return @$result;
+    return map { (ref $self)->new(@$_) } @$result;
 }
 
 sub bounding_box {
@@ -108,7 +115,7 @@ sub clip_end {
         }
         
         my $new_point = Slic3r::Geometry::point_along_segment($last_point, $self->[-1], $distance);
-        $self->append(Slic3r::Point->new($new_point));
+        $self->append($new_point);
         $distance = 0;
     }
 }
@@ -142,22 +149,18 @@ use Moo;
 
 has 'polylines' => (is => 'ro', default => sub { [] });
 
-# If the second argument is provided, this method will return its items sorted
-# instead of returning the actual sorted polylines. 
 # Note that our polylines will be reversed in place when necessary.
 sub chained_path {
     my $self = shift;
-    my ($start_near, $items, $no_reverse) = @_;
+    my ($start_near, $no_reverse) = @_;
     
-    $items ||= $self->polylines;
-    my %items_map = map { $self->polylines->[$_] => $items->[$_] } 0 .. $#{$self->polylines};
     my @my_paths = @{$self->polylines};
     
     my @paths = ();
     my $start_at;
     my $endpoints = $no_reverse
-        ? [ map { $_->[0], $_->[0]  } @my_paths ]
-        : [ map { $_->[0], $_->[-1] } @my_paths ];
+        ? [ map { @$_[0,0] }  @my_paths ]
+        : [ map { @$_[0,-1] } @my_paths ];
     while (@my_paths) {
         # find nearest point
         my $start_index = defined $start_near
@@ -172,7 +175,7 @@ sub chained_path {
         splice @$endpoints, $path_index*2, 2;
         $start_near = $paths[-1][-1];
     }
-    return map $items_map{"$_"}, @paths;
+    return @paths;
 }
 
 1;
diff --git a/lib/Slic3r/Print.pm b/lib/Slic3r/Print.pm
index 338118a2b..af5e3eb4d 100644
--- a/lib/Slic3r/Print.pm
+++ b/lib/Slic3r/Print.pm
@@ -833,7 +833,7 @@ sub write_gcode {
         }
     } else {
         # order objects using a nearest neighbor search
-        my @obj_idx = chained_path([ map $_->copies->[0], @{$self->objects} ]);
+        my @obj_idx = chained_path([ map Slic3r::Point->new(@{$_->copies->[0]}), @{$self->objects} ]);
         
         # sort layers by Z
         my %layers = ();  # print_z => [ layer, layer, layer ]  by obj_idx
diff --git a/t/geometry.t b/t/geometry.t
index ac808fa1d..cdec8eb95 100644
--- a/t/geometry.t
+++ b/t/geometry.t
@@ -29,37 +29,38 @@ isnt Slic3r::Geometry::line_intersection($line1, $line2, 1), undef, 'line_inters
 #==========================================================
 
 {
-    my $polyline = [
+    my $polygon = Slic3r::Polygon->new(
         [459190000, 5152739000], [147261000, 4612464000], [147261000, 3487535000], [339887000, 3153898000], 
         [437497000, 3438430000], [454223000, 3522515000], [523621000, 3626378000], [627484000, 3695776000], 
         [750000000, 3720147000], [872515000, 3695776000], [976378000, 3626378000], [1045776000, 3522515000], 
         [1070147000, 3400000000], [1045776000, 3277484000], [976378000, 3173621000], [872515000, 3104223000], 
         [827892000, 3095347000], [698461000, 2947261000], [2540810000, 2947261000], [2852739000, 3487535000], 
         [2852739000, 4612464000], [2540810000, 5152739000],
-    ];
+    );
     
     # this points belongs to $polyline
-    my $point = [2797980957.103410,3392691792.513960];
+    # note: it's actually a vertex, while we should better check an intermediate point
+    my $point = Slic3r::Point->new(1045776000, 3277484000);
     
     local $Slic3r::Geometry::epsilon = 1E-5;
-    is_deeply Slic3r::Geometry::polygon_segment_having_point($polyline, $point), 
-        [ [2540810000, 2947261000], [2852739000, 3487535000] ],
+    is_deeply Slic3r::Geometry::polygon_segment_having_point($polygon, $point)->pp, 
+        [ [1070147000, 3400000000], [1045776000, 3277484000] ],
         'polygon_segment_having_point';
 }
 
 #==========================================================
 
 {
-    my $point = [ 736310778.185108, 5017423926.8924 ];
-    my $line = [ [627484000, 3695776000], [750000000, 3720147000] ];
+    my $point = Slic3r::Point->new(736310778.185108, 5017423926.8924);
+    my $line = Slic3r::Line->new([627484000, 3695776000], [750000000, 3720147000]);
     is Slic3r::Geometry::point_in_segment($point, $line), 0, 'point_in_segment';
 }
 
 #==========================================================
 
 {
-    my $point = [ 736310778.185108, 5017423926.8924 ];
-    my $line = [ [627484000, 3695776000], [750000000, 3720147000] ];
+    my $point = Slic3r::Point->new(736310778.185108, 5017423926.8924);
+    my $line = Slic3r::Line->new([627484000, 3695776000], [750000000, 3720147000]);
     is Slic3r::Geometry::point_in_segment($point, $line), 0, 'point_in_segment';
 }
 
@@ -158,7 +159,7 @@ is Slic3r::Geometry::can_connect_points(@$points, $polygons), 0, 'can_connect_po
 
 {
     my $polyline = Slic3r::Polyline->new([0, 0], [10, 0], [20, 0]);
-    is_deeply [ map $_->pp, $polyline->lines ], [
+    is_deeply [ map $_->pp, @{$polyline->lines} ], [
         [ [0, 0], [10, 0] ],
         [ [10, 0], [20, 0] ],
     ], 'polyline_lines';
@@ -167,8 +168,8 @@ is Slic3r::Geometry::can_connect_points(@$points, $polygons), 0, 'can_connect_po
 #==========================================================
 
 {
-    my $polyline = Slic3r::Polygon->new([0, 0], [10, 0], [5, 5]);
-    my $result = $polyline->split_at_index(1);
+    my $polygon = Slic3r::Polygon->new([0, 0], [10, 0], [5, 5]);
+    my $result = $polygon->split_at_index(1);
     is ref($result), 'Slic3r::Polyline', 'split_at_index returns polyline';
     is_deeply $result->pp, [ [10, 0], [5, 5], [0, 0], [10, 0] ], 'split_at_index';
 }
diff --git a/t/perimeters.t b/t/perimeters.t
index 1dacd31c0..9ff53f01a 100644
--- a/t/perimeters.t
+++ b/t/perimeters.t
@@ -57,10 +57,10 @@ use Slic3r::Test;
                 if ($cur_loop) {
                     $has_cw_loops = 1 if !Slic3r::Geometry::Clipper::is_counter_clockwise($cur_loop);
                     if ($self->F == $config->external_perimeter_speed*60) {
-                        my $move_dest = [ @$info{qw(new_X new_Y)} ];
+                        my $move_dest = Slic3r::Point->new_scale(@$info{qw(new_X new_Y)});
                         $external_loops{$self->Z}++;
                         $has_outwards_move = 1
-                            if !Slic3r::Polygon->new(@$cur_loop)->encloses_point($move_dest)
+                            if !Slic3r::Polygon->new_scale(@$cur_loop)->encloses_point($move_dest)
                                 ? ($external_loops{$self->Z} == 2)  # contour should include destination
                                 : ($external_loops{$self->Z} == 1); # hole should not
                     }
diff --git a/t/polyclip.t b/t/polyclip.t
index 4882892bd..2cfe6951f 100644
--- a/t/polyclip.t
+++ b/t/polyclip.t
@@ -14,21 +14,21 @@ use Slic3r;
 
 #==========================================================
 
-is Slic3r::Geometry::point_in_segment([10, 10], [ [5, 10], [20, 10] ]), 1, 'point in horizontal segment';
-is Slic3r::Geometry::point_in_segment([30, 10], [ [5, 10], [20, 10] ]), 0, 'point not in horizontal segment';
-is Slic3r::Geometry::point_in_segment([10, 10], [ [10, 5], [10, 20] ]), 1, 'point in vertical segment';
-is Slic3r::Geometry::point_in_segment([10, 30], [ [10, 5], [10, 20] ]), 0, 'point not in vertical segment';
-is Slic3r::Geometry::point_in_segment([15, 15], [ [10, 10], [20, 20] ]), 1, 'point in diagonal segment';
-is Slic3r::Geometry::point_in_segment([20, 15], [ [10, 10], [20, 20] ]), 0, 'point not in diagonal segment';
+is Slic3r::Geometry::point_in_segment(Slic3r::Point->new(10, 10), Slic3r::Line->new([5, 10], [20, 10])), 1, 'point in horizontal segment';
+is Slic3r::Geometry::point_in_segment(Slic3r::Point->new(30, 10), Slic3r::Line->new([5, 10], [20, 10])), 0, 'point not in horizontal segment';
+is Slic3r::Geometry::point_in_segment(Slic3r::Point->new(10, 10), Slic3r::Line->new([10, 5], [10, 20])), 1, 'point in vertical segment';
+is Slic3r::Geometry::point_in_segment(Slic3r::Point->new(10, 30), Slic3r::Line->new([10, 5], [10, 20])), 0, 'point not in vertical segment';
+is Slic3r::Geometry::point_in_segment(Slic3r::Point->new(15, 15), Slic3r::Line->new([10, 10], [20, 20])), 1, 'point in diagonal segment';
+is Slic3r::Geometry::point_in_segment(Slic3r::Point->new(20, 15), Slic3r::Line->new([10, 10], [20, 20])), 0, 'point not in diagonal segment';
 
 #==========================================================
 
-my $square = [  # ccw
+my $square = Slic3r::Polygon->new(  # ccw
     [100, 100],
     [200, 100],
     [200, 200],
     [100, 200],
-];
+);
 
 my $line = Slic3r::Line->new([50, 150], [300, 150]);
 
@@ -37,17 +37,17 @@ is_deeply $intersection, [ [100, 150], [200, 150] ], 'line is clipped to square'
 
 #==========================================================
 
-$intersection = Slic3r::Geometry::clip_segment_polygon([ [0, 150], [80, 150] ], $square);
+$intersection = Slic3r::Geometry::clip_segment_polygon(Slic3r::Line->new([0, 150], [80, 150]), $square);
 is $intersection, undef, 'external lines are ignored 1';
 
 #==========================================================
 
-$intersection = Slic3r::Geometry::clip_segment_polygon([ [300, 150], [400, 150] ], $square);
+$intersection = Slic3r::Geometry::clip_segment_polygon(Slic3r::Line->new([300, 150], [400, 150]), $square);
 is $intersection, undef, 'external lines are ignored 2';
 
 #==========================================================
 
-$intersection = Slic3r::Geometry::clip_segment_polygon([ [120, 120], [180, 160] ], $square);
+$intersection = Slic3r::Geometry::clip_segment_polygon(Slic3r::Line->new([120, 120], [180, 160]), $square);
 is_deeply $intersection, [ [120, 120], [180, 160] ], 'internal lines are preserved';
 
 #==========================================================
@@ -66,45 +66,45 @@ is_deeply $intersection, [ [120, 120], [180, 160] ], 'internal lines are preserv
     is $expolygon->encloses_point(Slic3r::Point->new(140, 140)), 1, 'point on hole corner is recognized';
     {
         my $intersections = $expolygon->clip_line(Slic3r::Line->new([150,180], [150,150]));
-        is_deeply $intersections, [
+        is_deeply [ map $_->pp, @$intersections ], [
             [ [150, 180], [150, 160] ],
         ], 'line is clipped to square with hole';
     }
     {
         my $intersections = $expolygon->clip_line(Slic3r::Line->new([150,150], [150,120]));
-        is_deeply $intersections, [
+        is_deeply [ map $_->pp, @$intersections ], [
             [ [150, 140], [150, 120] ],
         ], 'line is clipped to square with hole';
     }
     {
         my $intersections = $expolygon->clip_line(Slic3r::Line->new([120,180], [180,180]));
-        is_deeply $intersections, [
+        is_deeply [ map $_->pp, @$intersections ], [
             [ [120,180], [180,180] ],
         ], 'line is clipped to square with hole';
     }
     {
         my $intersections = $expolygon->clip_line($line);
-        is_deeply $intersections, [
+        is_deeply [ map $_->pp, @$intersections ], [
             [ [100, 150], [140, 150] ],
             [ [160, 150], [200, 150] ],
         ], 'line is clipped to square with hole';
     }
     {
         my $intersections = $expolygon->clip_line(Slic3r::Line->new(reverse @$line));
-        is_deeply $intersections, [
+        is_deeply [ map $_->pp, @$intersections ], [
             [ [200, 150], [160, 150] ],
             [ [140, 150], [100, 150] ],
         ], 'reverse line is clipped to square with hole';
     }
     {
         my $intersections = $expolygon->clip_line(Slic3r::Line->new([100,180], [200,180]));
-        is_deeply $intersections, [
+        is_deeply [ map $_->pp, @$intersections ], [
             [ [100, 180], [200, 180] ],
         ], 'tangent line is clipped to square with hole';
     }
     {
         my $polyline = Slic3r::Polyline->new([50, 180], [250, 180], [250, 150], [150, 150], [150, 120], [120, 120], [120, 50]);
-        is_deeply [ map $_, $polyline->clip_with_expolygon($expolygon) ], [
+        is_deeply [ map $_->pp, $polyline->clip_with_expolygon($expolygon) ], [
             [ [100, 180], [200, 180] ],
             [ [200, 150], [160, 150] ],
             [ [150, 140], [150, 120], [120, 120], [120, 100] ],
@@ -143,9 +143,9 @@ is_deeply $intersection, [ [120, 120], [180, 160] ], 'internal lines are preserv
     $line = Slic3r::Line->new([152.742,288.086671142818], [152.742,34.166466971035]);
     
     my $intersections = $expolygon->clip_line($line);
-    is_deeply $intersections, [
-        [ [152.742, 287.908315789474], [152.742, 214.522],  ],
-        [ [152.742, 107.478], [152.742, 35] ],
+    is_deeply [ map $_->pp, @$intersections ], [
+        [ [152, 287], [152, 214],  ],
+        [ [152, 107], [152, 35] ],
     ], 'line is clipped to square with hole';
 }
 
diff --git a/xs/lib/Slic3r/XS.pm b/xs/lib/Slic3r/XS.pm
index 363a95b82..fcf7054b0 100644
--- a/xs/lib/Slic3r/XS.pm
+++ b/xs/lib/Slic3r/XS.pm
@@ -7,26 +7,36 @@ our $VERSION = '0.01';
 use XSLoader;
 XSLoader::load(__PACKAGE__, $VERSION);
 
+package Slic3r::Line;
+use overload
+    '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1;
+
 package Slic3r::Point;
 use overload
-    '@{}' => sub { $_[0]->arrayref };
+    '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1;
 
 package Slic3r::ExPolygon;
 use overload
-    '@{}' => sub { $_[0]->arrayref };
+    '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1;
 
 package Slic3r::Polyline;
 use overload
     '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1,
     'fallback' => 1;
 
 package Slic3r::Polygon;
 use overload
-    '@{}' => sub { $_[0]->arrayref };
+    '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1;
 
 package Slic3r::ExPolygon::Collection;
 use overload
-    '@{}' => sub { $_[0]->arrayref };
+    '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1;
 
 package Slic3r::ExtrusionLoop;
 use overload
@@ -116,6 +126,7 @@ sub clone {
 
 package Slic3r::Surface::Collection;
 use overload
-    '@{}' => sub { $_[0]->arrayref };
+    '@{}' => sub { $_[0]->arrayref },
+    'fallback' => 1;
 
 1;
diff --git a/xs/src/Point.hpp b/xs/src/Point.hpp
index 09f9f36d3..b324ac6d1 100644
--- a/xs/src/Point.hpp
+++ b/xs/src/Point.hpp
@@ -72,8 +72,8 @@ void
 Point::from_SV(SV* point_sv)
 {
     AV* point_av = (AV*)SvRV(point_sv);
-    this->x = (unsigned long)SvIV(*av_fetch(point_av, 0, 0));
-    this->y = (unsigned long)SvIV(*av_fetch(point_av, 1, 0));
+    this->x = (long)SvIV(*av_fetch(point_av, 0, 0));
+    this->y = (long)SvIV(*av_fetch(point_av, 1, 0));
 }
 
 void
diff --git a/xs/src/Polygon.hpp b/xs/src/Polygon.hpp
index bb5a1440f..a644535db 100644
--- a/xs/src/Polygon.hpp
+++ b/xs/src/Polygon.hpp
@@ -40,7 +40,7 @@ Polygon::split_at_index(int index)
     for (int i = index; i < this->points.size(); i++) {
         poly->points.push_back( this->points[i] );
     }
-    for (int i = 0; i < index; i++) {
+    for (int i = 0; i <= index; i++) {
         poly->points.push_back( this->points[i] );
     }
     return poly;
diff --git a/xs/t/03_point.t b/xs/t/03_point.t
index a6e188279..687006b98 100644
--- a/xs/t/03_point.t
+++ b/xs/t/03_point.t
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 
 use Slic3r::XS;
-use Test::More tests => 5;
+use Test::More tests => 7;
 
 my $point = Slic3r::Point->new(10, 15);
 is_deeply [ @$point ], [10, 15], 'point roundtrip';
@@ -19,4 +19,10 @@ is_deeply [ @$point2 ], [30, 15], 'translate';
 ok $point->coincides_with($point->clone), 'coincides_with';
 ok !$point->coincides_with($point2), 'coincides_with';
 
+{
+    my $point3 = Slic3r::Point->new(4300000, -9880845);
+    is $point->[0], $point->x, 'x accessor';
+    is $point->[1], $point->y, 'y accessor';
+}
+
 __END__
diff --git a/xs/t/06_polygon.t b/xs/t/06_polygon.t
index 473eaae0e..053bf5e65 100644
--- a/xs/t/06_polygon.t
+++ b/xs/t/06_polygon.t
@@ -27,7 +27,7 @@ is_deeply [ map $_->pp, @$lines ], [
     [ [100, 200], [100, 100] ],
 ], 'polygon lines';
 
-is_deeply $polygon->split_at_first_point->pp, $square, 'split_at_first_point';
-is_deeply $polygon->split_at_index(2)->pp, [ @$square[2,3,0,1] ], 'split_at_index';
+is_deeply $polygon->split_at_first_point->pp, [ @$square[0,1,2,3,0] ], 'split_at_first_point';
+is_deeply $polygon->split_at_index(2)->pp, [ @$square[2,3,0,1,2] ], 'split_at_index';
 
 __END__
diff --git a/xs/t/08_extrusionloop.t b/xs/t/08_extrusionloop.t
index 9a7a087d2..a218825f1 100644
--- a/xs/t/08_extrusionloop.t
+++ b/xs/t/08_extrusionloop.t
@@ -28,10 +28,10 @@ is $loop->role, Slic3r::ExtrusionPath::EXTR_ROLE_FILL, 'modify role';
 
 {
     my $path = $loop->split_at_first_point;
-    is_deeply $path->polyline->pp, $square, 'split_at_first_point';
+    is_deeply $path->polyline->pp, [ @$square[0,1,2,3,0] ], 'split_at_first_point';
     is $path->role, $loop->role, 'role preserved after split';
     
-    is_deeply $loop->split_at_index(2)->polyline->pp, [ @$square[2,3,0,1] ], 'split_at_index';
+    is_deeply $loop->split_at_index(2)->polyline->pp, [ @$square[2,3,0,1,2] ], 'split_at_index';
 }
 
 __END__
diff --git a/xs/t/10_line.t b/xs/t/10_line.t
new file mode 100644
index 000000000..b026bcf09
--- /dev/null
+++ b/xs/t/10_line.t
@@ -0,0 +1,40 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Slic3r::XS;
+use Test::More tests => 6;
+
+my $points = [
+    [100, 100],
+    [200, 100],
+];
+
+my $line = Slic3r::Line->new(@$points);
+is_deeply $line->pp, $points, 'line roundtrip';
+
+is ref($line->arrayref), 'ARRAY', 'line arrayref is unblessed';
+isa_ok $line->[0], 'Slic3r::Point', 'line point is blessed';
+
+{
+    my $clone = $line->clone;
+    $clone->reverse;
+    is_deeply $clone->pp, [ reverse @$points ], 'reverse';
+}
+
+{
+    my $line2 = Slic3r::Line->new($line->a->clone, $line->b->clone);
+    is_deeply $line2->pp, $points, 'line roundtrip with cloned points';
+}
+
+{
+    my $clone = $line->clone;
+    $clone->translate(10, -5);
+    is_deeply $clone->pp, [
+        [110, 95],
+        [210, 95],
+    ], 'translate';
+}
+
+__END__
diff --git a/xs/xsp/ExtrusionLoop.xsp b/xs/xsp/ExtrusionLoop.xsp
index 22d6b37d1..9bcd196a3 100644
--- a/xs/xsp/ExtrusionLoop.xsp
+++ b/xs/xsp/ExtrusionLoop.xsp
@@ -11,6 +11,8 @@
         %code{% RETVAL = THIS->polygon.to_SV(); %};
     SV* pp()
         %code{% RETVAL = THIS->polygon.to_SV_pureperl(); %};
+    void reverse()
+        %code{% THIS->polygon.reverse(); %};
     ExtrusionPath* split_at_index(int index)
         %code{% const char* CLASS = "Slic3r::ExtrusionPath"; RETVAL = THIS->split_at_index(index); %};
     ExtrusionPath* split_at_first_point()
diff --git a/xs/xsp/ExtrusionPath.xsp b/xs/xsp/ExtrusionPath.xsp
index 782530454..3d139d53b 100644
--- a/xs/xsp/ExtrusionPath.xsp
+++ b/xs/xsp/ExtrusionPath.xsp
@@ -14,6 +14,8 @@
     void pop_back()
         %code{% THIS->polyline.points.pop_back(); %};
     void reverse();
+    Lines lines()
+        %code{% RETVAL = THIS->polyline.lines(); %};
 %{
 
 ExtrusionPath*
diff --git a/xs/xsp/Line.xsp b/xs/xsp/Line.xsp
index f80b27d38..4a8a1da56 100644
--- a/xs/xsp/Line.xsp
+++ b/xs/xsp/Line.xsp
@@ -18,6 +18,8 @@
     Point* b()
         %code{% const char* CLASS = "Slic3r::Point"; RETVAL = new Point(THIS->b); %};
     void reverse();
+    void scale(double factor);
+    void translate(double x, double y);
 %{
 
 Line*
@@ -29,6 +31,16 @@ Line::new(...)
         RETVAL->b.from_SV_check( ST(2) );
     OUTPUT:
         RETVAL
+        }
+
+void
+Line::rotate(angle, center_sv)
+    double  angle;
+    SV*     center_sv;
+    CODE:
+        Point center;
+        center.from_SV_check(center_sv);
+        THIS->rotate(angle, &center);
 
 %}
 };
diff --git a/xs/xsp/Point.xsp b/xs/xsp/Point.xsp
index e9a4c680c..6d308d62b 100644
--- a/xs/xsp/Point.xsp
+++ b/xs/xsp/Point.xsp
@@ -6,7 +6,7 @@
 %}
 
 %name{Slic3r::Point} class Point {
-    Point(unsigned long _x = 0, unsigned long _y = 0);
+    Point(long _x = 0, long _y = 0);
     ~Point();
     Point* clone()
         %code{% const char* CLASS = "Slic3r::Point"; RETVAL = new Point(*THIS); %};
@@ -14,9 +14,11 @@
     void translate(double x, double y);
     SV* arrayref()
         %code{% RETVAL = THIS->to_SV_pureperl(); %};
-    unsigned long x()
+    SV* pp()
+        %code{% RETVAL = THIS->to_SV_pureperl(); %};
+    long x()
         %code{% RETVAL = THIS->x; %};
-    unsigned long y()
+    long y()
         %code{% RETVAL = THIS->y; %};
 
 %{
diff --git a/xs/xsp/Polygon.xsp b/xs/xsp/Polygon.xsp
index 0c5e7a1a5..4217d1e80 100644
--- a/xs/xsp/Polygon.xsp
+++ b/xs/xsp/Polygon.xsp
@@ -15,6 +15,7 @@
         %code{% RETVAL = THIS->to_SV_pureperl(); %};
     void scale(double factor);
     void translate(double x, double y);
+    void reverse();
     Lines lines();
     Polyline* split_at_index(int index)
         %code{% const char* CLASS = "Slic3r::Polyline"; RETVAL = THIS->split_at_index(index); %};
diff --git a/xs/xsp/Polyline.xsp b/xs/xsp/Polyline.xsp
index a2ce8a329..c2e0a548b 100644
--- a/xs/xsp/Polyline.xsp
+++ b/xs/xsp/Polyline.xsp
@@ -38,7 +38,7 @@ Polyline::append(...)
     CODE:
         for (unsigned int i = 1; i < items; i++) {
             Point p;
-            p.from_SV_check( ST(1) );
+            p.from_SV_check( ST(i) );
             THIS->points.push_back(p);
         }