Added new clean function removing only primitives

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@706 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Core/Mesh/ArrayKernel.cc

@@ -117,6 +117,21 @@ void ArrayKernel::garbage_collection(bool _v, bool _e, bool _f)
   garbage_collection( empty_vh,empty_hh,empty_fh,_v, _e, _f);
 }
 
+void ArrayKernel::clean()
+{
+
+  vertices_.clear();
+  VertexContainer().swap( vertices_ );
+
+  edges_.clear();
+  EdgeContainer().swap( edges_ );
+
+  faces_.clear();
+  FaceContainer().swap( faces_ );
+
+}
+
+
 void ArrayKernel::clear()
 {
   vprops_clear();
@@ -124,17 +139,11 @@ void ArrayKernel::clear()
   hprops_clear();
   fprops_clear();
 
-  vertices_.clear();
+  clean();
-  VertexContainer().swap( vertices_ );
-
-  edges_.clear();
-  EdgeContainer().swap( edges_ );
-  
-  faces_.clear();
-  FaceContainer().swap( faces_ );
-
 }
 
+
+
 void ArrayKernel::resize( unsigned int _n_vertices, unsigned int _n_edges, unsigned int _n_faces )
 {
   vertices_.resize(_n_vertices);

src/OpenMesh/Core/Mesh/ArrayKernel.hh

@@ -303,8 +303,18 @@ public:
                           std_API_Container_FHandlePointer& fh_to_update,
                           bool _v=true, bool _e=true, bool _f=true);
 
+  /** \brief Clear the whole mesh
+   *
+   *  This will remove all properties and elements from the mesh
+   */
   void clear();
 
+  /** \brief Reset the whole mesh
+   *
+   *  This will remove all elements from the mesh but keeps the properties
+   */
+  void clean();
+
   // --- number of items ---
   unsigned int n_vertices()  const { return vertices_.size(); }
   unsigned int n_halfedges() const { return 2*edges_.size(); }