Refactoring: removed _islands members in Slic3r::GCode

lib/Slic3r/GCode.pm

@@ -25,8 +25,6 @@ has 'enable_cooling_markers' => (is =>'rw', default => sub {0});
 has 'layer_count'        => (is => 'ro');
 has '_layer_index'       => (is => 'rw', default => sub {-1});  # just a counter
 has 'layer'              => (is => 'rw');
-has '_layer_islands'     => (is => 'rw');
-has '_upper_layer_islands'  => (is => 'rw');
 has '_seam_position'     => (is => 'ro', default => sub { {} });  # $object => pos
 has 'first_layer'        => (is => 'rw', default => sub {0});   # this flag triggers first layer speeds
 has 'elapsed_time'       => (is => 'rw', default => sub {0} );  # seconds
@@ -84,8 +82,6 @@ sub change_layer {
     $self->first_layer($layer->id == 0);
     
     # avoid computing islands and overhangs if they're not needed
-    $self->_layer_islands($layer->islands);
-    $self->_upper_layer_islands($layer->upper_layer ? $layer->upper_layer->islands : []);
     if ($self->config->avoid_crossing_perimeters) {
         $self->avoid_crossing_perimeters->init_layer_mp(
             union_ex([ map @$_, @{$layer->slices} ], 1),
@@ -351,9 +347,9 @@ sub travel_to {
     if ($travel->length < scale $self->config->get_at('retract_before_travel', $self->writer->extruder->id)
         || ($self->config->only_retract_when_crossing_perimeters
             && $self->config->fill_density > 0
-            && (first { $_->contains_line($travel) } @{$self->_upper_layer_islands})
-            && (first { $_->contains_line($travel) } @{$self->_layer_islands}))
-        || (defined $role && $role == EXTR_ROLE_SUPPORTMATERIAL && (first { $_->contains_line($travel) } @{$self->layer->support_islands}))
+            && $self->layer->slices->contains_line($travel)
+            && (!$self->layer->has_upper_layer || $self->layer->upper_layer->slices->contains_line($travel)))
+        || (defined $role && $role == EXTR_ROLE_SUPPORTMATERIAL && $self->layer->support_islands->contains_line($travel))
         ) {
         # Just perform a straight travel move without any retraction.
         $gcode .= $self->writer->travel_to_xy($self->point_to_gcode($point), $comment);
@@ -608,29 +604,19 @@ sub _plan {
     my ($self, $gcodegen, $mp, $point, $comment) = @_;
     
     my $gcode = "";
-    my @travel = @{$mp->shortest_path($gcodegen->last_pos, $point)->lines};
+    my $travel = $mp->shortest_path($gcodegen->last_pos, $point);
     
     # if the path is not contained in a single island we need to retract
-    my $need_retract = !$gcodegen->config->only_retract_when_crossing_perimeters;
-    if (!$need_retract) {
-        $need_retract = 1;
-        foreach my $island (@{$gcodegen->_upper_layer_islands}) {
-            # discard the island if at any line is not enclosed in it
-            next if first { !$island->contains_line($_) } @travel;
-            # okay, this island encloses the full travel path
-            $need_retract = 0;
-            last;
-        }
-    }
-    
-    # perform the retraction
-    $gcode .= $gcodegen->retract if $need_retract;
+    $gcode .= $gcodegen->retract
+        if !$gcodegen->config->only_retract_when_crossing_perimeters
+        || !$gcodegen->layer->slices->contains_polyline($travel)
+        || ($gcodegen->layer->has_upper_layer && !$gcodegen->layer->upper_layer->slices->contains_polyline($travel));
     
     # append the actual path and return
     # use G1 because we rely on paths being straight (G0 may make round paths)
     $gcode .= join '',
         map $gcodegen->writer->travel_to_xy($self->point_to_gcode($_->b), $comment),
-        @travel;
+        @{$travel->lines};
     
     return $gcode;
 }

lib/Slic3r/Layer.pm

@@ -16,12 +16,6 @@ sub config {
     return $self->object->config;
 }
 
-# the purpose of this method is to be overridden for ::Support layers
-sub islands {
-    my $self = shift;
-    return $self->slices;
-}
-
 sub region {
     my $self = shift;
     my ($region_id) = @_;
@@ -120,12 +114,6 @@ sub make_perimeters {
 }
 
 package Slic3r::Layer::Support;
-
 our @ISA = qw(Slic3r::Layer);
 
-sub islands {
-    my $self = shift;
-    return [ @{$self->slices}, @{$self->support_islands} ];
-}
-
 1;

xs/src/libslic3r/ExPolygonCollection.cpp

@@ -64,6 +64,24 @@ ExPolygonCollection::contains_point(const Point &point) const
     return false;
 }
 
+bool
+ExPolygonCollection::contains_line(const Line &line) const
+{
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it) {
+        if (it->contains_line(line)) return true;
+    }
+    return false;
+}
+
+bool
+ExPolygonCollection::contains_polyline(const Polyline &polyline) const
+{
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it) {
+        if (it->contains_polyline(polyline)) return true;
+    }
+    return false;
+}
+
 void
 ExPolygonCollection::simplify(double tolerance)
 {

xs/src/libslic3r/ExPolygonCollection.hpp

@@ -3,6 +3,8 @@
 
 #include <myinit.h>
 #include "ExPolygon.hpp"
+#include "Line.hpp"
+#include "Polyline.hpp"
 
 namespace Slic3r {
 
@@ -23,6 +25,8 @@ class ExPolygonCollection
     void translate(double x, double y);
     void rotate(double angle, const Point &center);
     bool contains_point(const Point &point) const;
+    bool contains_line(const Line &line) const;
+    bool contains_polyline(const Polyline &polyline) const;
     void simplify(double tolerance);
     void convex_hull(Polygon* hull) const;
 };

xs/xsp/ExPolygonCollection.xsp

@@ -19,6 +19,10 @@
         %code{% RETVAL = THIS->expolygons.size(); %};
     bool contains_point(Point* point)
         %code{% RETVAL = THIS->contains_point(*point); %};
+    bool contains_line(Line* line)
+        %code{% RETVAL = THIS->contains_line(*line); %};
+    bool contains_polyline(Polyline* polyline)
+        %code{% RETVAL = THIS->contains_polyline(*polyline); %};
     void simplify(double tolerance);
     Polygons polygons()
         %code{% RETVAL = *THIS; %};

xs/xsp/Layer.xsp

@@ -53,7 +53,11 @@
         %code%{ THIS->upper_layer = layer; %};
     void set_lower_layer(Layer *layer)
         %code%{ THIS->lower_layer = layer; %};
-
+    bool has_upper_layer()
+        %code%{ RETVAL = (THIS->upper_layer != NULL); %};
+    bool has_lower_layer()
+        %code%{ RETVAL = (THIS->lower_layer != NULL); %};
+    
     size_t region_count();
     Ref<LayerRegion> get_region(int idx);
     Ref<LayerRegion> add_region(PrintRegion* print_region);
@@ -99,6 +103,10 @@
         %code%{ THIS->upper_layer = layer; %};
     void set_lower_layer(SupportLayer *layer)
         %code%{ THIS->lower_layer = layer; %};
+    bool has_upper_layer()
+        %code%{ RETVAL = (THIS->upper_layer != NULL); %};
+    bool has_lower_layer()
+        %code%{ RETVAL = (THIS->lower_layer != NULL); %};
 
     size_t region_count();
     Ref<LayerRegion> get_region(int idx);