From 070c47b0a5461f4051efda83885c0ab8c67eebc8 Mon Sep 17 00:00:00 2001
From: cignoni <paolo.cignoni@isti.cnr.it>
Date: Tue, 9 Nov 2010 08:12:58 +0000
Subject: [PATCH] added method to know if a spatial ubdexing structure is empty
 or not

---
 vcg/space/index/grid_static_ptr.h | 1 +
 vcg/space/index/spatial_hashing.h | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/vcg/space/index/grid_static_ptr.h b/vcg/space/index/grid_static_ptr.h
index 8e1d6276..6be7ec16 100644
--- a/vcg/space/index/grid_static_ptr.h
+++ b/vcg/space/index/grid_static_ptr.h
@@ -132,6 +132,7 @@ namespace vcg {
 
 
 
+    bool Empty() const {return links.empty();}
 
 		/// Date le coordinate di un grid point (corner minx,miy,minz) ritorna le celle che condividono
 		/// l'edge cell che parte dal grid point in direzione axis
diff --git a/vcg/space/index/spatial_hashing.h b/vcg/space/index/spatial_hashing.h
index 0e906e07..f2a2f7d6 100644
--- a/vcg/space/index/spatial_hashing.h
+++ b/vcg/space/index/spatial_hashing.h
@@ -115,6 +115,10 @@ namespace vcg{
 		void operator ++() {t++;}
 	};
 	
+  inline bool Empty() const
+  {
+    return hash_table.empty();
+  }
 
     size_t CellSize(const Point3i &cell)
     {