Added deleteMesh to GModel

Geo/GModel.cpp

@@ -250,6 +250,19 @@ void GModel::destroyMeshCaches()
   _octree = 0;
 }
 
+void GModel::deleteMesh()
+{
+	for(riter it=firstRegion();it!=lastRegion();++it)
+		(*it)->deleteMesh();
+	for(fiter it=firstFace();it!=lastFace();++it)
+		(*it)->deleteMesh();
+	for(eiter it=firstEdge();it!=lastEdge();++it)
+		(*it)->deleteMesh();
+	for(viter it=firstVertex();it!=lastVertex();++it)
+		(*it)->deleteMesh();
+	destroyMeshCaches();
+}
+
 bool GModel::empty() const
 {
   return vertices.empty() && edges.empty() && faces.empty() && regions.empty();

Geo/GModel.h

@@ -151,6 +151,8 @@ class GModel
   // delete all the mesh-related caches (this must be called when the
   // mesh is changed)
   void destroyMeshCaches();
+  //delete the mesh stored in entities and call destroMeshCaches
+  void deleteMesh();
 
   // access internal CAD representations
   GEO_Internals *getGEOInternals(){ return _geo_internals; }