Revert "23418: [OCC] Mesh: Minimization of memory usage of SMESH"

[modules/smesh.git] / src / SMDS / SMDS_IteratorOfElements.cxx

diff --git a/src/SMDS/SMDS_IteratorOfElements.cxx b/src/SMDS/SMDS_IteratorOfElements.cxx
new file mode 100644 (file)
index 0000000..3d125fc
--- /dev/null
+++ b/src/SMDS/SMDS_IteratorOfElements.cxx
@@ -0,0 +1,109 @@
+// Copyright (C) 2007-2016  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//  SMESH SMDS : implementation of Salome mesh data structure
+//
+#ifdef _MSC_VER
+#pragma warning(disable:4786)
+#endif
+
+#include "SMDS_IteratorOfElements.hxx"
+
+bool SMDS_IteratorOfElements::subMore()
+{
+        if((t2Iterator.get()==NULL)||(!t2Iterator->more()))
+        {
+                if(t1Iterator->more())
+                {
+                        t2Iterator=t1Iterator->next()->elementsIterator(myType);
+                        return subMore();
+                }
+                else return false;
+        }
+        else return true;
+}
+
+const SMDS_MeshElement * SMDS_IteratorOfElements::subNext()
+{
+        if((t2Iterator.get()==NULL)||(!t2Iterator->more()))
+                if(t1Iterator->more())
+                        t2Iterator=t1Iterator->next()->elementsIterator(myType);
+        return t2Iterator->next();
+}
+
+/////////////////////////////////////////////////////////////////////////////
+/// Create an iterator which look for elements of type type which are linked 
+/// to the element element. it is the iterator to get connectivity of element
+//////////////////////////////////////////////////////////////////////////////
+SMDS_IteratorOfElements::SMDS_IteratorOfElements(const SMDS_MeshElement *    element,
+                                                 SMDSAbs_ElementType         type,
+                                                 const SMDS_ElemIteratorPtr& it)
+  : t1Iterator(it),
+    t2Iterator(SMDS_ElemIteratorPtr((SMDS_ElemIterator*)NULL)),
+    myType(type), myElement(element),
+    myProxyElement(NULL)
+{
+  while(subMore())
+    alreadyReturnedElements.insert(subNext());
+  itAlreadyReturned= alreadyReturnedElements.begin();
+  switch(myElement->GetType())
+  {
+  case SMDSAbs_Node:
+  case SMDSAbs_Edge: myReverseIteration=true; break;
+  case SMDSAbs_Face: myReverseIteration=(type==SMDSAbs_Volume); break;
+  default: myReverseIteration=false;
+  }
+}
+
+bool SMDS_IteratorOfElements::more()
+{
+        if(myProxyElement==NULL)
+        {
+                while(itAlreadyReturned!=alreadyReturnedElements.end())
+                {
+                        myProxyElement=*itAlreadyReturned;
+                        itAlreadyReturned++;    
+
+                        if(myReverseIteration)
+                        {
+                                SMDS_ElemIteratorPtr it=
+                                        myProxyElement->elementsIterator(myElement->GetType());
+                                while(it->more())
+                                {                               
+                                        if(it->next()==myElement) return true;
+                                }
+                        }
+                        else return true;
+                }
+                myProxyElement=NULL;
+                return false;
+        }
+        else return true;
+}
+
+const SMDS_MeshElement * SMDS_IteratorOfElements::next()
+{
+        more();
+        const SMDS_MeshElement *e=myProxyElement;
+        myProxyElement=NULL;
+        return e;
+}