Added optional scaling factor to Voronoi construction.

src/Mod/Path/App/Voronoi.h

@@ -107,6 +107,9 @@ namespace Path
       return new T(vd, index);
     }
 
+    double getScale() const { return vd->getScale(); }
+    void   setScale(double scale) { vd->setScale(scale); }
+
   private:
     Base::Reference<diagram_type> vd;
   };

src/Mod/Path/App/VoronoiPyImp.cpp

@@ -68,10 +68,13 @@ PyObject *VoronoiPy::PyMake(struct _typeobject *, PyObject *, PyObject *)  // Py
 // constructor
 int VoronoiPy::PyInit(PyObject* args, PyObject* /*kwds*/)
 {
-  if (!PyArg_ParseTuple(args, "")) {
-    PyErr_SetString(PyExc_RuntimeError, "no arguments accepted");
+  Voronoi *vo = getVoronoiPtr();
+  double scale = vo->getScale();
+  if (!PyArg_ParseTuple(args, "|d", &scale)) {
+    PyErr_SetString(PyExc_RuntimeError, "scale argument (double) accepted, default = 1000");
     return -1;
   }
+  vo->setScale(scale);
   return 0;
 }