src/SMDS/SMDS_IteratorOfElements.cxx

   1 //  SMESH SMDS : implementaion of Salome mesh data structure
   2 //
   3 //  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   4 //  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   5 //
   6 //  This library is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU Lesser General Public
   8 //  License as published by the Free Software Foundation; either
   9 //  version 2.1 of the License.
  10 //
  11 //  This library is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 //  Lesser General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU Lesser General Public
  17 //  License along with this library; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 //
  20 //  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
  21
  22 #ifdef _MSC_VER
  23 #pragma warning(disable:4786)
  24 #endif
  25
  26 #include "SMDS_IteratorOfElements.hxx"
  27
  28 bool SMDS_IteratorOfElements::subMore()
  29 {
  30         if((t2Iterator.get()==NULL)||(!t2Iterator->more()))
  31         {
  32                 if(t1Iterator->more())
  33                 {
  34                         t2Iterator=t1Iterator->next()->elementsIterator(myType);
  35                         return subMore();
  36                 }
  37                 else return false;
  38         }
  39         else return true;
  40 }
  41
  42 const SMDS_MeshElement * SMDS_IteratorOfElements::subNext()
  43 {
  44         if((t2Iterator.get()==NULL)||(!t2Iterator->more()))
  45                 if(t1Iterator->more())
  46                         t2Iterator=t1Iterator->next()->elementsIterator(myType);
  47         return t2Iterator->next();
  48 }
  49
  50 /////////////////////////////////////////////////////////////////////////////
  51 /// Create an iterator which look for elements of type type which are linked
  52 /// to the element element. it is the iterator to get connectivity of element
  53 //////////////////////////////////////////////////////////////////////////////
  54 SMDS_IteratorOfElements::SMDS_IteratorOfElements(const SMDS_MeshElement * element,
  55                                                  SMDSAbs_ElementType type,
  56                                                  const SMDS_ElemIteratorPtr& it)
  57      : t1Iterator(it),
  58        t2Iterator(SMDS_ElemIteratorPtr((SMDS_ElemIterator*)NULL)),
  59        myType(type), myElement(element),
  60        myProxyElement(NULL)
  61 {
  62         while(subMore())
  63                 alreadyReturnedElements.insert(subNext());
  64         itAlreadyReturned= alreadyReturnedElements.begin();
  65         switch(myElement->GetType())
  66         {
  67         case SMDSAbs_Node:
  68         case SMDSAbs_Edge: myReverseIteration=true; break;
  69         case SMDSAbs_Face: myReverseIteration=(type==SMDSAbs_Volume); break;
  70         default: myReverseIteration=false;
  71         }
  72 }
  73
  74 bool SMDS_IteratorOfElements::more()
  75 {
  76         if(myProxyElement==NULL)
  77         {
  78                 while(itAlreadyReturned!=alreadyReturnedElements.end())
  79                 {
  80                         myProxyElement=*itAlreadyReturned;
  81                         itAlreadyReturned++;
  82
  83                         if(myReverseIteration)
  84                         {
  85                                 SMDS_ElemIteratorPtr it=
  86                                         myProxyElement->elementsIterator(myElement->GetType());
  87                                 while(it->more())
  88                                 {
  89                                         if(it->next()==myElement) return true;
  90                                 }
  91                         }
  92                         else return true;
  93                 }
  94                 myProxyElement=NULL;
  95                 return false;
  96         }
  97         else return true;
  98 }
  99
 100 const SMDS_MeshElement * SMDS_IteratorOfElements::next()
 101 {
 102         more();
 103         const SMDS_MeshElement *e=myProxyElement;
 104         myProxyElement=NULL;
 105         return e;
 106 }