Finished implementation of TriangleMesh->split

xs/xsp/ExPolygon.xsp

@@ -10,7 +10,7 @@
     ExPolygon* clone()
         %code{% const char* CLASS = "Slic3r::ExPolygon"; RETVAL = new ExPolygon(*THIS); %};
     SV* arrayref()
-        %code{% RETVAL = THIS->to_SV(); %};
+        %code{% RETVAL = THIS->to_AV(); %};
     SV* pp()
         %code{% RETVAL = THIS->to_SV_pureperl(); %};
     Polygon* contour()

xs/xsp/ExtrusionLoop.xsp

@@ -8,7 +8,7 @@
 %name{Slic3r::ExtrusionLoop} class ExtrusionLoop {
     ~ExtrusionLoop();
     SV* arrayref()
-        %code{% RETVAL = THIS->polygon.to_SV(); %};
+        %code{% RETVAL = THIS->polygon.to_AV(); %};
     SV* pp()
         %code{% RETVAL = THIS->polygon.to_SV_pureperl(); %};
     void reverse()

xs/xsp/ExtrusionPath.xsp

@@ -8,7 +8,7 @@
 %name{Slic3r::ExtrusionPath} class ExtrusionPath {
     ~ExtrusionPath();
     SV* arrayref()
-        %code{% RETVAL = THIS->polyline.to_SV(); %};
+        %code{% RETVAL = THIS->polyline.to_AV(); %};
     SV* pp()
         %code{% RETVAL = THIS->polyline.to_SV_pureperl(); %};
     void pop_back()

xs/xsp/Line.xsp

@@ -10,7 +10,7 @@
     Line* clone()
         %code{% const char* CLASS = "Slic3r::Line"; RETVAL = new Line(*THIS); %};
     SV* arrayref()
-        %code{% RETVAL = THIS->to_SV(); %};
+        %code{% RETVAL = THIS->to_AV(); %};
     SV* pp()
         %code{% RETVAL = THIS->to_SV_pureperl(); %};
     Point* a()

xs/xsp/Polygon.xsp

@@ -10,7 +10,7 @@
     Polygon* clone()
         %code{% const char* CLASS = "Slic3r::Polygon"; RETVAL = new Polygon(*THIS); %};
     SV* arrayref()
-        %code{% RETVAL = THIS->to_SV(); %};
+        %code{% RETVAL = THIS->to_AV(); %};
     SV* pp()
         %code{% RETVAL = THIS->to_SV_pureperl(); %};
     void scale(double factor);

xs/xsp/Polyline.xsp

@@ -10,7 +10,7 @@
     Polyline* clone()
         %code{% const char* CLASS = "Slic3r::Polyline"; RETVAL = new Polyline(*THIS); %};
     SV* arrayref()
-        %code{% RETVAL = THIS->to_SV(); %};
+        %code{% RETVAL = THIS->to_AV(); %};
     SV* pp()
         %code{% RETVAL = THIS->to_SV_pureperl(); %};
     void scale(double factor);

xs/xsp/TriangleMesh.xsp

@@ -16,6 +16,7 @@
     void translate(float x, float y, float z);
     void align_to_origin();
     void rotate(double angle, Point* center);
+    TriangleMeshPtrs split();
 %{
 
 SV*

xs/xsp/my.map

@@ -18,13 +18,22 @@ SurfaceType     T_UV
 ClipperLib::JoinType		T_UV
 ClipperLib::PolyFillType		T_UV
 
+# we return these types whenever we want the items to be cloned
 Points          T_ARRAYREF
 Lines           T_ARRAYREF
 Polygons        T_ARRAYREF
 ExPolygons      T_ARRAYREF
 
+# we return these types whenever we want the items to be returned
+# by reference and marked ::Ref because they're contained in another
+# Perl object
 Polygons*       T_ARRAYREF_PTR
 
+# we return these types whenever we want the items to be returned
+# by reference and not marked ::Ref because they're newly allocated
+# and not referenced by any Perl object
+TriangleMeshPtrs T_PTR_ARRAYREF
+
 INPUT
 
 T_ARRAYREF
@@ -52,7 +61,7 @@ T_ARRAYREF
 	av_extend(av, $var.size()-1);
 	int i = 0;
     for (${type}::const_iterator it = $var.begin(); it != $var.end(); ++it) {
-        av_store(av, i++, (*it).to_SV_clone_ref());
+        av_store(av, i++, it->to_SV_clone_ref());
 	}
 	$var.clear();
 
@@ -63,5 +72,15 @@ T_ARRAYREF_PTR
 	av_extend(av, $var->size()-1);
 	int i = 0;
     for (${ my $t = $type; $t =~ s/\*$//; \$t }::iterator it = $var->begin(); it != $var->end(); ++it) {
-        av_store(av, i++, (*it).to_SV_ref());
+        av_store(av, i++, it->to_SV_ref());
+	}
+
+T_PTR_ARRAYREF
+    AV* av = newAV();
+	$arg = newRV_noinc((SV*)av);
+	sv_2mortal($arg);
+	av_extend(av, $var.size()-1);
+	int i = 0;
+    for (${type}::iterator it = $var.begin(); it != $var.end(); ++it) {
+        av_store(av, i++, (*it)->to_SV());
 	}

xs/xsp/typemap.xspt

@@ -16,7 +16,7 @@
 %typemap{Polygons};
 %typemap{ExPolygons};
 %typemap{Polygons*};
-%typemap{Lines*};
+%typemap{TriangleMeshPtrs};
 
 %typemap{SurfaceType}{parsed}{
   %cpp_type{SurfaceType};