diff --git a/vcg/space/box2.h b/vcg/space/box2.h
index 32b5f816..d52d432e 100644
--- a/vcg/space/box2.h
+++ b/vcg/space/box2.h
@@ -59,6 +59,12 @@ public:
 	inline  Box2( const Box2 & b ) { min=b.min; max=b.max; }
 		/// Min Max constructor
 	inline  Box2( const Point2<BoxScalarType> & mi, const Point2<BoxScalarType> & ma ) { min = mi; max = ma; }
+
+    inline Box2(const Point2<BoxScalarType> & center, const BoxScalarType & radius) {
+        min = center-Point2<BoxScalarType>(radius,radius);
+        max = center+Point2<BoxScalarType>(radius,radius);
+      }
+
 		/// Distructor
 	inline ~Box2() { }
 		/// Operator to compare two bounding box