Add Mpwh::bbox()

Polygon/include/CGAL/Multipolygon_with_holes_2.h

@@ -101,6 +101,16 @@ public:
 
   Size number_of_polygons_with_holes() const { return static_cast<Size>(m_polygons.size()); }
 
+  Bbox_2 bbox() const
+  {
+    Bbox_2 bb;
+    for(const auto& pwh : polygons_with_holes()){
+      bb += pwh.bbox();
+    }
+    return bb;
+  }
+
+
 protected:
   Polygon_with_holes_container m_polygons;
 };

Polygon/test/Polygon/Multipolygon_with_holes_test.cpp

@@ -45,5 +45,7 @@ int main()
 
   std::cout << mp << std::endl;
 
+  CGAL::Bbox_2 bb = mp.bbox();
+
   return 0;
 }