Finished porting LayerRegion to C++

xs/xsp/BridgeDetector.xsp

@@ -9,14 +9,10 @@
     ~BridgeDetector();
     
     bool detect_angle();
-    Polygons coverage()
-        %code{% THIS->coverage(&RETVAL); %};
-    Polygons coverage_by_angle(double angle)
-        %code{% THIS->coverage(angle, &RETVAL); %};
-    Polylines unsupported_edges()
-        %code{% THIS->unsupported_edges(&RETVAL); %};
-    Polylines unsupported_edges_by_angle(double angle)
-        %code{% THIS->unsupported_edges(angle, &RETVAL); %};
+    Polygons coverage();
+    %name{coverage_by_angle} Polygons coverage(double angle);
+    Polylines unsupported_edges();
+    %name{unsupported_edges_by_angle} Polylines unsupported_edges(double angle);
     double angle()
         %code{% RETVAL = THIS->angle; %};
     double resolution()

xs/xsp/Layer.xsp

@@ -17,8 +17,8 @@
         %code%{ RETVAL = &THIS->thin_fills; %};
     Ref<SurfaceCollection> fill_surfaces()
         %code%{ RETVAL = &THIS->fill_surfaces; %};
-    Ref<ExPolygonCollection> bridged()
-        %code%{ RETVAL = &THIS->bridged; %};
+    Polygons bridged()
+        %code%{ RETVAL = THIS->bridged; %};
     Ref<PolylineCollection> unsupported_bridge_edges()
         %code%{ RETVAL = &THIS->unsupported_bridge_edges; %};
     Ref<ExtrusionEntityCollection> perimeters()
@@ -32,6 +32,7 @@
     void prepare_fill_surfaces();
     void make_perimeters(SurfaceCollection* slices, SurfaceCollection* fill_surfaces)
         %code%{ THIS->make_perimeters(*slices, fill_surfaces); %};
+    double infill_area_threshold();
 };
 
 %name{Slic3r::Layer} class Layer {

xs/xsp/Print.xsp

@@ -107,6 +107,7 @@ _constant()
     void set_step_started(PrintObjectStep step)
         %code%{ THIS->state.set_started(step); %};
     
+    void process_external_surfaces();
     void bridge_over_infill();
     
     int ptr()