Made cube and cylinder static functions of the package, not some specific TriangleMesh object.

xs/xsp/TriangleMesh.xsp

@@ -37,10 +37,7 @@
         %code{% RETVAL = THIS->bounding_box().center(); %};
     int facets_count();
     void reset_repair_stats();
-    Clone<TriangleMesh> cube(double x, double y, double z) 
-        %code{% RETVAL = make_cube(x, y, z); %};
-    Clone<TriangleMesh> cylinder(double r, double h) 
-        %code{% RETVAL = make_cylinder(r, h); %};
+
 %{
 
 void
@@ -228,6 +225,21 @@ TriangleMesh::bb3()
     OUTPUT:
         RETVAL
 
+
+Clone<TriangleMesh>
+cube(double x, double y, double z) 
+    CODE:
+        RETVAL = make_cube(x,y,z);
+    OUTPUT:
+        RETVAL
+
+Clone<TriangleMesh> 
+cylinder(double r, double h) 
+    CODE:
+        RETVAL = make_cylinder(r, h);
+    OUTPUT:
+        RETVAL
+
 %}
 };