From: eap <eap@opencascade.com>
Date: Mon, 23 Jan 2006 14:07:26 +0000 (+0000)
Subject: Implement quadratic classes
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=e4f721477b9d4b9b4c025a6e423af474a89b0b1a;p=modules%2Fsmesh.git

Implement quadratic classes
---

diff --git a/src/SMDS/SMDS_Mesh.cxx b/src/SMDS/SMDS_Mesh.cxx
index 6381e547e..5bc8cd544 100644
--- a/src/SMDS/SMDS_Mesh.cxx
+++ b/src/SMDS/SMDS_Mesh.cxx
@@ -31,6 +31,9 @@
 #include "SMDS_FaceOfEdges.hxx"
 #include "SMDS_PolyhedralVolumeOfNodes.hxx"
 #include "SMDS_PolygonalFaceOfNodes.hxx"
+#include "SMDS_QuadraticEdge.hxx"
+#include "SMDS_QuadraticFaceOfNodes.hxx"
+#include "SMDS_QuadraticVolumeOfNodes.hxx"
 
 #include <algorithm>
 #include <map>
@@ -2200,4 +2203,596 @@ SMDSAbs_ElementType SMDS_Mesh::GetElementType( const int id, const bool iselem )
   }
   else
     return elem->GetType();
-}
\ No newline at end of file
+}
+
+
+
+//********************************************************************
+//********************************************************************
+//********                                                   *********
+//*****       Methods for addition of quadratic elements        ******
+//********                                                   *********
+//********************************************************************
+//********************************************************************
+
+//=======================================================================
+//function : AddEdgeWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshEdge* SMDS_Mesh::AddEdgeWithID(int n1, int n2, int n12, int ID) 
+{
+  SMDS_MeshNode* node1 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n1);
+  SMDS_MeshNode* node2 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n2);
+  SMDS_MeshNode* node12 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n12);
+  if(!node1 || !node2 || !node12) return NULL;
+  return SMDS_Mesh::AddEdgeWithID(node1, node2, node12, ID);
+}
+
+//=======================================================================
+//function : AddEdge
+//purpose  : 
+//=======================================================================
+SMDS_MeshEdge* SMDS_Mesh::AddEdge(const SMDS_MeshNode* n1,
+				  const SMDS_MeshNode* n2,
+                                  const SMDS_MeshNode* n12)
+{
+  return SMDS_Mesh::AddEdgeWithID(n1, n2, n12, myElementIDFactory->GetFreeID());
+}
+
+//=======================================================================
+//function : AddEdgeWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshEdge* SMDS_Mesh::AddEdgeWithID(const SMDS_MeshNode * n1,
+					const SMDS_MeshNode * n2, 
+					const SMDS_MeshNode * n12, 
+					int ID)
+{
+  cout<<"SMDS_Mesh::AddEdgeWithID"<<endl;
+  SMDS_QuadraticEdge* edge = new SMDS_QuadraticEdge(n1,n2,n12);
+  if(myElementIDFactory->BindID(ID, edge)) {
+    SMDS_MeshNode *node1,*node2, *node12;
+    node1 = const_cast<SMDS_MeshNode*>(n1);
+    node2 = const_cast<SMDS_MeshNode*>(n2);
+    node12 = const_cast<SMDS_MeshNode*>(n12);
+    node1->AddInverseElement(edge);
+    node2->AddInverseElement(edge);
+    node12->AddInverseElement(edge);
+    myEdges.Add(edge);
+    return edge;
+  } 
+  else {
+    delete edge;
+    return NULL;
+  }
+}
+
+
+//=======================================================================
+//function : AddFace
+//purpose  : 
+//=======================================================================
+SMDS_MeshFace* SMDS_Mesh::AddFace(const SMDS_MeshNode * n1,
+				  const SMDS_MeshNode * n2,
+				  const SMDS_MeshNode * n3,
+                                  const SMDS_MeshNode * n12,
+                                  const SMDS_MeshNode * n23,
+                                  const SMDS_MeshNode * n31)
+{
+  return SMDS_Mesh::AddFaceWithID(n1,n2,n3,n12,n23,n31,
+                                  myElementIDFactory->GetFreeID());
+}
+
+//=======================================================================
+//function : AddFaceWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshFace* SMDS_Mesh::AddFaceWithID(int n1, int n2, int n3,
+                                        int n12,int n23,int n31, int ID)
+{
+  SMDS_MeshNode * node1 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n1);
+  SMDS_MeshNode * node2 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n2);
+  SMDS_MeshNode * node3 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n3);
+  SMDS_MeshNode * node12 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n12);
+  SMDS_MeshNode * node23 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n23);
+  SMDS_MeshNode * node31 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n31);
+  if(!node1 || !node2 || !node3 || !node12 || !node23 || !node31) return NULL;
+  return SMDS_Mesh::AddFaceWithID(node1, node2, node3,
+                                  node12, node23, node31, ID);
+}
+
+//=======================================================================
+//function : AddFaceWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshFace* SMDS_Mesh::AddFaceWithID(const SMDS_MeshNode * n1,
+                                        const SMDS_MeshNode * n2,
+                                        const SMDS_MeshNode * n3,
+                                        const SMDS_MeshNode * n12,
+                                        const SMDS_MeshNode * n23,
+                                        const SMDS_MeshNode * n31, 
+                                        int ID)
+{
+  cout<<"SMDS_Mesh::AddFaceWithID"<<endl;
+  if(hasConstructionEdges()) {
+    // creation quadratic edges - not implemented
+  }
+  SMDS_QuadraticFaceOfNodes* face =
+    new SMDS_QuadraticFaceOfNodes(n1,n2,n3,n12,n23,n31);
+  myFaces.Add(face);
+
+  if (!registerElement(ID, face)) {
+    RemoveElement(face, false);
+    face = NULL;
+  }
+  return face;
+}
+
+
+//=======================================================================
+//function : AddFace
+//purpose  : 
+//=======================================================================
+SMDS_MeshFace* SMDS_Mesh::AddFace(const SMDS_MeshNode * n1,
+				  const SMDS_MeshNode * n2,
+				  const SMDS_MeshNode * n3,
+				  const SMDS_MeshNode * n4,
+                                  const SMDS_MeshNode * n12,
+                                  const SMDS_MeshNode * n23,
+                                  const SMDS_MeshNode * n34,
+                                  const SMDS_MeshNode * n41)
+{
+  return SMDS_Mesh::AddFaceWithID(n1,n2,n3,n4,n12,n23,n34,n41,
+                                  myElementIDFactory->GetFreeID());
+}
+
+//=======================================================================
+//function : AddFaceWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshFace* SMDS_Mesh::AddFaceWithID(int n1, int n2, int n3, int n4,
+                                        int n12,int n23,int n34,int n41, int ID)
+{
+  SMDS_MeshNode * node1 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n1);
+  SMDS_MeshNode * node2 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n2);
+  SMDS_MeshNode * node3 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n3);
+  SMDS_MeshNode * node4 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n4);
+  SMDS_MeshNode * node12 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n12);
+  SMDS_MeshNode * node23 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n23);
+  SMDS_MeshNode * node34 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n34);
+  SMDS_MeshNode * node41 = (SMDS_MeshNode *)myNodeIDFactory->MeshElement(n41);
+  if(!node1 || !node2 || !node3 || !node4 ||
+     !node12 || !node23 || !node34 || !node41) return NULL;
+  return SMDS_Mesh::AddFaceWithID(node1, node2, node3, node4,
+                                  node12, node23, node34, node41, ID);
+}
+
+//=======================================================================
+//function : AddFaceWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshFace* SMDS_Mesh::AddFaceWithID(const SMDS_MeshNode * n1,
+                                        const SMDS_MeshNode * n2,
+                                        const SMDS_MeshNode * n3,
+                                        const SMDS_MeshNode * n4,
+                                        const SMDS_MeshNode * n12,
+                                        const SMDS_MeshNode * n23,
+                                        const SMDS_MeshNode * n34, 
+                                        const SMDS_MeshNode * n41, 
+                                        int ID)
+{
+  cout<<"SMDS_Mesh::AddFaceWithID"<<endl;
+  if(hasConstructionEdges()) {
+    // creation quadratic edges - not implemented
+  }
+  SMDS_QuadraticFaceOfNodes* face =
+    new SMDS_QuadraticFaceOfNodes(n1,n2,n3,n4,n12,n23,n34,n41);
+  myFaces.Add(face);
+
+  if (!registerElement(ID, face)) {
+    RemoveElement(face, false);
+    face = NULL;
+  }
+  return face;
+}
+
+
+//=======================================================================
+//function : AddVolume
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolume(const SMDS_MeshNode * n1,
+				      const SMDS_MeshNode * n2, 
+				      const SMDS_MeshNode * n3,
+				      const SMDS_MeshNode * n4,
+                                      const SMDS_MeshNode * n12,
+                                      const SMDS_MeshNode * n23,
+                                      const SMDS_MeshNode * n31,
+                                      const SMDS_MeshNode * n14, 
+                                      const SMDS_MeshNode * n24,
+                                      const SMDS_MeshNode * n34)
+{
+  int ID = myElementIDFactory->GetFreeID();
+  SMDS_MeshVolume * v = SMDS_Mesh::AddVolumeWithID(n1, n2, n3, n4, n12, n23,
+                                                   n31, n14, n24, n34, ID);
+  if(v==NULL) myElementIDFactory->ReleaseID(ID);
+  return v;
+}
+
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(int n1, int n2, int n3, int n4,
+                                            int n12,int n23,int n31,
+                                            int n14,int n24,int n34, int ID)
+{
+  SMDS_MeshNode *node1, *node2, *node3, *node4, *node12, *node23;
+  SMDS_MeshNode *node31, *node14, *node24, *node34;
+  node1 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n1);
+  node2 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n2);
+  node3 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n3);
+  node4 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n4);
+  node12 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n12);
+  node23 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n23);
+  node31 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n31);
+  node14 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n14);
+  node24 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n24);
+  node34 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n34);
+  if( !node1 || !node2 || !node3 || !node4 || !node12 || !node23 ||
+     !node31 || !node14 || !node24 || !node34 ) return NULL;
+  return SMDS_Mesh::AddVolumeWithID(node1, node2, node3, node4, node12, node23,
+                                    node31, node14, node24, node34, ID);
+}
+	
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 2d order tetrahedron of 10 nodes
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(const SMDS_MeshNode * n1,
+                                            const SMDS_MeshNode * n2,
+                                            const SMDS_MeshNode * n3,
+                                            const SMDS_MeshNode * n4,
+                                            const SMDS_MeshNode * n12,
+                                            const SMDS_MeshNode * n23,
+                                            const SMDS_MeshNode * n31,
+                                            const SMDS_MeshNode * n14, 
+                                            const SMDS_MeshNode * n24,
+                                            const SMDS_MeshNode * n34,
+                                            int ID)
+{
+  cout<<"SMDS_Mesh::AddVolumeWithID"<<endl;
+  if(hasConstructionFaces()) {
+    // creation quadratic faces - not implemented
+  }
+  SMDS_QuadraticVolumeOfNodes * volume =
+    new SMDS_QuadraticVolumeOfNodes(n1,n2,n3,n4,n12,n23,n31,n14,n24,n34);
+  myVolumes.Add(volume);
+
+  if (!registerElement(ID, volume)) {
+    RemoveElement(volume, false);
+    volume = NULL;
+  }
+  return volume;
+}
+
+
+//=======================================================================
+//function : AddVolume
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolume(const SMDS_MeshNode * n1,
+				      const SMDS_MeshNode * n2, 
+				      const SMDS_MeshNode * n3,
+				      const SMDS_MeshNode * n4,
+                                      const SMDS_MeshNode * n5, 
+                                      const SMDS_MeshNode * n12,
+                                      const SMDS_MeshNode * n23,
+                                      const SMDS_MeshNode * n34,
+                                      const SMDS_MeshNode * n41,
+                                      const SMDS_MeshNode * n15, 
+                                      const SMDS_MeshNode * n25,
+                                      const SMDS_MeshNode * n35,
+                                      const SMDS_MeshNode * n45)
+{
+  int ID = myElementIDFactory->GetFreeID();
+  SMDS_MeshVolume * v =
+    SMDS_Mesh::AddVolumeWithID(n1, n2, n3, n4, n5, n12, n23, n34, n41,
+                               n15, n25, n35, n45, ID);
+  if(v==NULL) myElementIDFactory->ReleaseID(ID);
+  return v;
+}
+
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(int n1, int n2, int n3, int n4, int n5,
+                                            int n12,int n23,int n34,int n41,
+                                            int n15,int n25,int n35,int n45, int ID)
+{
+  SMDS_MeshNode *node1, *node2, *node3, *node4, *node5;
+  SMDS_MeshNode *node12, *node23, *node34, *node41;
+  SMDS_MeshNode *node15, *node25, *node35, *node45;
+  node1 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n1);
+  node2 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n2);
+  node3 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n3);
+  node4 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n4);
+  node5 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n5);
+  node12 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n12);
+  node23 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n23);
+  node34 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n34);
+  node41 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n41);
+  node15 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n15);
+  node25 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n25);
+  node35 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n35);
+  node45 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n45);
+  if( !node1 || !node2 || !node3 || !node4 || !node5 ||
+      !node12 || !node23 || !node34 || !node41 ||
+      !node15 || !node25 || !node35 || !node45 ) return NULL;
+  return SMDS_Mesh::AddVolumeWithID(node1, node2, node3, node4, node5,
+                                    node12, node23, node34, node41,
+                                    node15, node25, node35, node45, ID);
+}
+	
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 2d order pyramid of 13 nodes
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(const SMDS_MeshNode * n1,
+                                            const SMDS_MeshNode * n2,
+                                            const SMDS_MeshNode * n3,
+                                            const SMDS_MeshNode * n4,
+                                            const SMDS_MeshNode * n5, 
+                                            const SMDS_MeshNode * n12,
+                                            const SMDS_MeshNode * n23,
+                                            const SMDS_MeshNode * n34,
+                                            const SMDS_MeshNode * n41,
+                                            const SMDS_MeshNode * n15, 
+                                            const SMDS_MeshNode * n25,
+                                            const SMDS_MeshNode * n35,
+                                            const SMDS_MeshNode * n45,
+                                            int ID)
+{
+  cout<<"SMDS_Mesh::AddVolumeWithID"<<endl;
+  if(hasConstructionFaces()) {
+    // creation quadratic faces - not implemented
+  }
+  SMDS_QuadraticVolumeOfNodes * volume =
+    new SMDS_QuadraticVolumeOfNodes(n1,n2,n3,n4,n5,n12,n23,
+                                    n34,n41,n15,n25,n35,n45);
+  myVolumes.Add(volume);
+
+  if (!registerElement(ID, volume)) {
+    RemoveElement(volume, false);
+    volume = NULL;
+  }
+  return volume;
+}
+
+
+//=======================================================================
+//function : AddVolume
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolume(const SMDS_MeshNode * n1,
+				      const SMDS_MeshNode * n2, 
+				      const SMDS_MeshNode * n3,
+				      const SMDS_MeshNode * n4,
+                                      const SMDS_MeshNode * n5, 
+                                      const SMDS_MeshNode * n6, 
+                                      const SMDS_MeshNode * n12,
+                                      const SMDS_MeshNode * n23,
+                                      const SMDS_MeshNode * n31, 
+                                      const SMDS_MeshNode * n45,
+                                      const SMDS_MeshNode * n56,
+                                      const SMDS_MeshNode * n64, 
+                                      const SMDS_MeshNode * n14,
+                                      const SMDS_MeshNode * n25,
+                                      const SMDS_MeshNode * n36)
+{
+  int ID = myElementIDFactory->GetFreeID();
+  SMDS_MeshVolume * v =
+    SMDS_Mesh::AddVolumeWithID(n1, n2, n3, n4, n5, n6, n12, n23, n31,
+                               n45, n56, n64, n14, n25, n36, ID);
+  if(v==NULL) myElementIDFactory->ReleaseID(ID);
+  return v;
+}
+
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(int n1, int n2, int n3,
+                                            int n4, int n5, int n6,
+                                            int n12,int n23,int n31,
+                                            int n45,int n56,int n64,
+                                            int n14,int n25,int n36, int ID)
+{
+  SMDS_MeshNode *node1, *node2, *node3, *node4, *node5, *node6;
+  SMDS_MeshNode *node12, *node23, *node31;
+  SMDS_MeshNode *node45, *node56, *node64;
+  SMDS_MeshNode *node14, *node25, *node36;
+  node1 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n1);
+  node2 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n2);
+  node3 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n3);
+  node4 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n4);
+  node5 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n5);
+  node6 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n6);
+  node12 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n12);
+  node23 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n23);
+  node31 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n31);
+  node45 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n45);
+  node56 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n56);
+  node64 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n64);
+  node14 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n14);
+  node25 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n25);
+  node36 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n36);
+  if( !node1 || !node2 || !node3 || !node4 || !node5 || !node6 ||
+      !node12 || !node23 || !node31 || !node45 || !node56 ||
+      !node64 || !node14 || !node25 || !node36 ) return NULL;
+  return SMDS_Mesh::AddVolumeWithID(node1, node2, node3, node4, node5, node6,
+                                    node12, node23, node31, node45, node56,
+                                    node64, node14, node25, node36, ID);
+}
+	
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 2d order Pentahedron with 15 nodes
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(const SMDS_MeshNode * n1,
+                                            const SMDS_MeshNode * n2,
+                                            const SMDS_MeshNode * n3,
+                                            const SMDS_MeshNode * n4,
+                                            const SMDS_MeshNode * n5, 
+                                            const SMDS_MeshNode * n6, 
+                                            const SMDS_MeshNode * n12,
+                                            const SMDS_MeshNode * n23,
+                                            const SMDS_MeshNode * n31, 
+                                            const SMDS_MeshNode * n45,
+                                            const SMDS_MeshNode * n56,
+                                            const SMDS_MeshNode * n64, 
+                                            const SMDS_MeshNode * n14,
+                                            const SMDS_MeshNode * n25,
+                                            const SMDS_MeshNode * n36,
+                                            int ID)
+{
+  cout<<"SMDS_Mesh::AddVolumeWithID"<<endl;
+  if(hasConstructionFaces()) {
+    // creation quadratic faces - not implemented
+  }
+  SMDS_QuadraticVolumeOfNodes * volume =
+    new SMDS_QuadraticVolumeOfNodes(n1,n2,n3,n4,n5,n6,n12,n23,n31,
+                                    n45,n56,n64,n14,n25,n36);
+  myVolumes.Add(volume);
+
+  if (!registerElement(ID, volume)) {
+    RemoveElement(volume, false);
+    volume = NULL;
+  }
+  return volume;
+}
+
+
+//=======================================================================
+//function : AddVolume
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolume(const SMDS_MeshNode * n1,
+				      const SMDS_MeshNode * n2, 
+				      const SMDS_MeshNode * n3,
+				      const SMDS_MeshNode * n4,
+                                      const SMDS_MeshNode * n5, 
+                                      const SMDS_MeshNode * n6, 
+                                      const SMDS_MeshNode * n7,
+                                      const SMDS_MeshNode * n8, 
+                                      const SMDS_MeshNode * n12,
+                                      const SMDS_MeshNode * n23,
+                                      const SMDS_MeshNode * n34,
+                                      const SMDS_MeshNode * n41, 
+                                      const SMDS_MeshNode * n56,
+                                      const SMDS_MeshNode * n67,
+                                      const SMDS_MeshNode * n78,
+                                      const SMDS_MeshNode * n85, 
+                                      const SMDS_MeshNode * n15,
+                                      const SMDS_MeshNode * n26,
+                                      const SMDS_MeshNode * n37,
+                                      const SMDS_MeshNode * n48)
+{
+  int ID = myElementIDFactory->GetFreeID();
+  SMDS_MeshVolume * v =
+    SMDS_Mesh::AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, n12, n23, n34, n41,
+                               n56, n67, n78, n85, n15, n26, n37, n48, ID);
+  if(v==NULL) myElementIDFactory->ReleaseID(ID);
+  return v;
+}
+
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(int n1, int n2, int n3, int n4,
+                                            int n5, int n6, int n7, int n8,
+                                            int n12,int n23,int n34,int n41,
+                                            int n56,int n67,int n78,int n85,
+                                            int n15,int n26,int n37,int n48, int ID)
+{
+  SMDS_MeshNode *node1, *node2, *node3, *node4;
+  SMDS_MeshNode *node5, *node6, *node7, *node8;
+  SMDS_MeshNode *node12, *node23, *node34, *node41;
+  SMDS_MeshNode *node56, *node67, *node78, *node85;
+  SMDS_MeshNode *node15, *node26, *node37, *node48;
+  node1 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n1);
+  node2 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n2);
+  node3 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n3);
+  node4 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n4);
+  node5 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n5);
+  node6 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n6);
+  node7 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n7);
+  node8 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n8);
+  node12 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n12);
+  node23 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n23);
+  node34 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n34);
+  node41 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n41);
+  node56 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n56);
+  node67 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n67);
+  node78 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n78);
+  node85 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n85);
+  node15 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n15);
+  node26 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n26);
+  node37 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n37);
+  node48 = (SMDS_MeshNode*) myNodeIDFactory->MeshElement(n48);
+  if( !node1 || !node2 || !node3 || !node4 ||
+      !node5 || !node6 || !node7 || !node8 ||
+      !node12 || !node23 || !node34 || !node41 ||
+      !node56 || !node67 || !node78 || !node85 ||
+      !node15 || !node26 || !node37 || !node48 ) return NULL;
+  return SMDS_Mesh::AddVolumeWithID(node1, node2, node3, node4,
+                                    node5, node6, node7, node8,
+                                    node12, node23, node34, node41,
+                                    node56, node67, node78, node85,
+                                    node15, node26, node37, node48, ID);
+}
+	
+//=======================================================================
+//function : AddVolumeWithID
+//purpose  : 2d order Hexahedrons with 20 nodes
+//=======================================================================
+SMDS_MeshVolume* SMDS_Mesh::AddVolumeWithID(const SMDS_MeshNode * n1,
+                                            const SMDS_MeshNode * n2,
+                                            const SMDS_MeshNode * n3,
+                                            const SMDS_MeshNode * n4,
+                                            const SMDS_MeshNode * n5, 
+                                            const SMDS_MeshNode * n6, 
+                                            const SMDS_MeshNode * n7,
+                                            const SMDS_MeshNode * n8, 
+                                            const SMDS_MeshNode * n12,
+                                            const SMDS_MeshNode * n23,
+                                            const SMDS_MeshNode * n34,
+                                            const SMDS_MeshNode * n41, 
+                                            const SMDS_MeshNode * n56,
+                                            const SMDS_MeshNode * n67,
+                                            const SMDS_MeshNode * n78,
+                                            const SMDS_MeshNode * n85, 
+                                            const SMDS_MeshNode * n15,
+                                            const SMDS_MeshNode * n26,
+                                            const SMDS_MeshNode * n37,
+                                            const SMDS_MeshNode * n48,
+                                            int ID)
+{
+  cout<<"SMDS_Mesh::AddVolumeWithID"<<endl;
+  if(hasConstructionFaces()) {
+    // creation quadratic faces - not implemented
+  }
+  SMDS_QuadraticVolumeOfNodes * volume =
+    new SMDS_QuadraticVolumeOfNodes(n1,n2,n3,n4,n5,n6,n7,n8,n12,n23,n34,n41,
+                                    n56,n67,n78,n85,n15,n26,n37,n48);
+  myVolumes.Add(volume);
+
+  if (!registerElement(ID, volume)) {
+    RemoveElement(volume, false);
+    volume = NULL;
+  }
+  return volume;
+}
+
diff --git a/src/SMDS/SMDS_Mesh.hxx b/src/SMDS/SMDS_Mesh.hxx
index 7147ac801..2dad43052 100644
--- a/src/SMDS/SMDS_Mesh.hxx
+++ b/src/SMDS/SMDS_Mesh.hxx
@@ -274,7 +274,7 @@ public:
 					   const SMDS_MeshNode * n23,
 					   const SMDS_MeshNode * n31,
 					   const SMDS_MeshNode * n14, 
-					   const SMDS_MeshNode * n23,
+					   const SMDS_MeshNode * n24,
 					   const SMDS_MeshNode * n34, 
 					   int ID);
   virtual SMDS_MeshVolume* AddVolume(const SMDS_MeshNode * n1,
@@ -285,7 +285,7 @@ public:
                                      const SMDS_MeshNode * n23,
                                      const SMDS_MeshNode * n31,
                                      const SMDS_MeshNode * n14, 
-                                     const SMDS_MeshNode * n23,
+                                     const SMDS_MeshNode * n24,
                                      const SMDS_MeshNode * n34);
 
   // 2d order pyramid of 13 nodes
diff --git a/src/SMDS/SMDS_MeshEdge.hxx b/src/SMDS/SMDS_MeshEdge.hxx
index 290210ca3..3fdf0ae1c 100644
--- a/src/SMDS/SMDS_MeshEdge.hxx
+++ b/src/SMDS/SMDS_MeshEdge.hxx
@@ -48,8 +48,8 @@ class SMDS_MeshEdge:public SMDS_MeshElement
 	SMDS_ElemIteratorPtr
 		elementsIterator(SMDSAbs_ElementType type) const;
 
-  private:
-	const SMDS_MeshNode* myNodes[2];
+  protected:
+	const SMDS_MeshNode* myNodes[3];
 
 };
 #endif
diff --git a/src/SMDS/SMDS_QuadraticEdge.cxx b/src/SMDS/SMDS_QuadraticEdge.cxx
new file mode 100644
index 000000000..1c7a44115
--- /dev/null
+++ b/src/SMDS/SMDS_QuadraticEdge.cxx
@@ -0,0 +1,120 @@
+// File:      SMDS_QuadraticEdge.cxx
+// Created:   16.01.06 16:25:42
+// Author:    Sergey KUUL
+// Copyright: Open CASCADE 2006
+
+
+#include "SMDS_QuadraticEdge.hxx"
+
+#include "SMDS_IteratorOfElements.hxx"
+#include "SMDS_MeshNode.hxx"
+
+using namespace std;
+
+//=======================================================================
+//function : SMDS_QuadraticEdge
+//purpose  : 
+//=======================================================================
+
+SMDS_QuadraticEdge::SMDS_QuadraticEdge(const SMDS_MeshNode * node1,
+                                       const SMDS_MeshNode * node2,
+                                       const SMDS_MeshNode * node12)
+     :SMDS_MeshEdge(node1,node2)
+{	
+  myNodes[2]=node12;
+}
+
+
+//=======================================================================
+//function : Print
+//purpose  : 
+//=======================================================================
+
+void SMDS_QuadraticEdge::Print(ostream & OS) const
+{
+  OS << "quadratic edge <" << GetID() << "> : ( first-" << myNodes[0]
+     << " , last-" << myNodes[1] << " , medium-" << myNodes[2] << ") " << endl;
+}
+
+
+//=======================================================================
+//function : NbNodes
+//purpose  : 
+//=======================================================================
+
+int SMDS_QuadraticEdge::NbNodes() const
+{
+  return 3;
+}
+
+
+//=======================================================================
+//function : Iterator
+//purpose  : 
+//=======================================================================
+
+class SMDS_QuadraticEdge_MyNodeIterator:public SMDS_ElemIterator
+{
+  const SMDS_MeshNode *const* myNodes;
+  int myIndex;
+ public:
+  SMDS_QuadraticEdge_MyNodeIterator(const SMDS_MeshNode * const* nodes):
+    myNodes(nodes),myIndex(0) {}
+
+  bool more()
+  {
+    return myIndex<3;
+  }
+
+  const SMDS_MeshElement* next()
+  {
+    myIndex++;
+    return myNodes[myIndex-1];
+  }
+};
+
+SMDS_ElemIteratorPtr SMDS_QuadraticEdge::
+	elementsIterator(SMDSAbs_ElementType type) const
+{
+  switch(type)
+  {
+  case SMDSAbs_Edge:
+    return SMDS_MeshElement::elementsIterator(SMDSAbs_Edge); 
+  case SMDSAbs_Node:
+    return SMDS_ElemIteratorPtr(new SMDS_QuadraticEdge_MyNodeIterator(myNodes));
+  default:
+    return SMDS_ElemIteratorPtr
+      (new SMDS_IteratorOfElements
+       (this,type, SMDS_ElemIteratorPtr(new SMDS_QuadraticEdge_MyNodeIterator(myNodes))));
+  }
+}
+
+
+//=======================================================================
+//function : ChangeNodes
+//purpose  : 
+//=======================================================================
+
+bool SMDS_QuadraticEdge::ChangeNodes(const SMDS_MeshNode * node1,
+                                     const SMDS_MeshNode * node2,
+                                     const SMDS_MeshNode * node12)
+{
+  myNodes[0]=node1;
+  myNodes[1]=node2;
+  myNodes[2]=node12;
+  return true;
+}
+
+
+//=======================================================================
+//function : IsMediumNode
+//purpose  : 
+//=======================================================================
+
+bool SMDS_QuadraticEdge::IsMediumNode(const SMDS_MeshNode * node) const
+{
+  return (myNodes[2]==node);
+}
+
+
+
diff --git a/src/SMDS/SMDS_QuadraticEdge.hxx b/src/SMDS/SMDS_QuadraticEdge.hxx
index 6bb9b2be4..0319c1cc4 100644
--- a/src/SMDS/SMDS_QuadraticEdge.hxx
+++ b/src/SMDS/SMDS_QuadraticEdge.hxx
@@ -28,26 +28,31 @@
 #define _SMDS_QuadraticEdge_HeaderFile
 
 #include "SMDS_MeshEdge.hxx"
+#include <iostream>
 
 class SMDS_WNT_EXPORT SMDS_QuadraticEdge: public SMDS_MeshEdge
 {
 
-  public:
-	SMDS_QuadraticEdge(const SMDS_MeshNode * node1,
-                           const SMDS_MeshNode * node2,
-                           const SMDS_MeshNode * node12);
-        bool ChangeNodes(const SMDS_MeshNode * node1,
-                         const SMDS_MeshNode * node2,
-                         const SMDS_MeshNode * node12);
-	void Print(std::ostream & OS) const;
-
-	int NbNodes() const;
-  protected:
-	SMDS_ElemIteratorPtr
-		elementsIterator(SMDSAbs_ElementType type) const;
-
-  private:
-	const SMDS_MeshNode* myNodes[3];
+public:
+    SMDS_QuadraticEdge(const SMDS_MeshNode * node1,
+                       const SMDS_MeshNode * node2,
+                       const SMDS_MeshNode * node12);
+
+    bool ChangeNodes(const SMDS_MeshNode * node1,
+                     const SMDS_MeshNode * node2,
+                     const SMDS_MeshNode * node12);
+
+    void Print(std::ostream & OS) const;
+    
+    int NbNodes() const;
+
+    virtual bool IsQuadratic() const { return true; }
+    
+    virtual bool IsMediumNode(const SMDS_MeshNode* node) const;
+
+protected:
+  SMDS_ElemIteratorPtr
+    elementsIterator(SMDSAbs_ElementType type) const;
 
 };
 #endif
diff --git a/src/SMDS/SMDS_QuadraticFaceOfNodes.cxx b/src/SMDS/SMDS_QuadraticFaceOfNodes.cxx
new file mode 100644
index 000000000..6d8e55156
--- /dev/null
+++ b/src/SMDS/SMDS_QuadraticFaceOfNodes.cxx
@@ -0,0 +1,233 @@
+// File:      SMDS_QuadraticFaceOfNodes.cxx
+// Created:   16.01.06 17:12:58
+// Author:    Sergey KUUL
+// Copyright: Open CASCADE 2006
+
+#include "SMDS_QuadraticFaceOfNodes.hxx"
+
+#include "SMDS_IteratorOfElements.hxx"
+#include "SMDS_MeshNode.hxx"
+
+#include "utilities.h"
+
+using namespace std;
+
+
+//=======================================================================
+//function : SMDS_QuadraticFaceOfNodes()
+//purpose  : Constructor
+//=======================================================================
+
+SMDS_QuadraticFaceOfNodes::SMDS_QuadraticFaceOfNodes(const SMDS_MeshNode * n1,
+                                                     const SMDS_MeshNode * n2,
+                                                     const SMDS_MeshNode * n3,
+                                                     const SMDS_MeshNode * n12,
+                                                     const SMDS_MeshNode * n23,
+                                                     const SMDS_MeshNode * n31)
+{
+  myNodes.push_back(n1);
+  myNodes.push_back(n2);
+  myNodes.push_back(n3);
+  myNodes.push_back(n12);
+  myNodes.push_back(n23);
+  myNodes.push_back(n31);
+}
+
+
+//=======================================================================
+//function : SMDS_QuadraticFaceOfNodes()
+//purpose  : Constructor
+//=======================================================================
+
+SMDS_QuadraticFaceOfNodes::SMDS_QuadraticFaceOfNodes(const SMDS_MeshNode * n1,
+                                                     const SMDS_MeshNode * n2,
+                                                     const SMDS_MeshNode * n3,
+                                                     const SMDS_MeshNode * n4,
+                                                     const SMDS_MeshNode * n12,
+                                                     const SMDS_MeshNode * n23,
+                                                     const SMDS_MeshNode * n34,
+                                                     const SMDS_MeshNode * n41)
+{
+  myNodes.push_back(n1);
+  myNodes.push_back(n2);
+  myNodes.push_back(n3);
+  myNodes.push_back(n4);
+  myNodes.push_back(n12);
+  myNodes.push_back(n23);
+  myNodes.push_back(n34);
+  myNodes.push_back(n41);
+}
+
+
+//=======================================================================
+//function : IsMediumNode
+//purpose  : 
+//=======================================================================
+
+bool SMDS_QuadraticFaceOfNodes::IsMediumNode(const SMDS_MeshNode * node) const
+{
+  int i=NbNodes()/2;
+  for(; i<NbNodes(); i++) {
+    if(myNodes[i]==node) return true;
+  }
+  return false;
+}
+
+
+//=======================================================================
+//function : ChangeNodes
+//purpose  : 
+//=======================================================================
+
+bool SMDS_QuadraticFaceOfNodes::ChangeNodes(const SMDS_MeshNode* nodes[],
+                                            const int            nbNodes)
+{
+  if( nbNodes==6 || nbNodes==8 ) {
+    myNodes.resize(nbNodes);
+    int i=0;
+    for(; i<nbNodes; i++) {
+      myNodes[i] = nodes[i];
+    }
+    return true;
+  }
+  return false;
+}
+
+
+//=======================================================================
+//function : NbNodes
+//purpose  : 
+//=======================================================================
+int SMDS_QuadraticFaceOfNodes::NbNodes() const
+{
+  return myNodes.size();
+}
+
+
+//=======================================================================
+//function : NbEdges
+//purpose  : 
+//=======================================================================
+int SMDS_QuadraticFaceOfNodes::NbEdges() const
+{
+  return NbNodes()/2;
+}
+
+
+//=======================================================================
+//function : NbFaces
+//purpose  : 
+//=======================================================================
+int SMDS_QuadraticFaceOfNodes::NbFaces() const
+{
+  return 1;
+}
+
+
+//=======================================================================
+//function : Print
+//purpose  : 
+//=======================================================================
+void SMDS_QuadraticFaceOfNodes::Print(ostream & OS) const
+{
+  OS << "quadratic face <" << GetID() << " > : ";
+  int i, nbNodes = myNodes.size();
+  for (i = 0; i < nbNodes - 1; i++)
+    OS << myNodes[i] << ",";
+  OS << myNodes[i] << ") " << endl;
+}
+
+
+//=======================================================================
+//function : interlacedNodesIterator
+//purpose  : 
+//=======================================================================
+class SMDS_QuadraticFaceOfNodes_MyInterlacedNodeIterator:public SMDS_NodeIterator
+{
+  const std::vector<const SMDS_MeshNode *> mySet;
+  int index;
+ public:
+  SMDS_QuadraticFaceOfNodes_MyInterlacedNodeIterator(const std::vector<const SMDS_MeshNode *> s):
+    mySet(s),index(0) {}
+
+  bool more()
+  {
+    return index < mySet.size();
+  }
+
+  const SMDS_MeshNode* next()
+  {
+    index++;
+    int num=0;
+    if(mySet.size()==6) {
+      if(index==2) num=3;
+      else if(index==3) num=1;
+      else if(index==4) num=4;
+      else if(index==5) num=2;
+      else if(index==6) num=5;
+    }
+    else {
+      if(index==2) num=4;
+      else if(index==3) num=1;
+      else if(index==4) num=5;
+      else if(index==5) num=2;
+      else if(index==6) num=6;
+      else if(index==7) num=3;
+      else if(index==8) num=7;
+    }
+    return mySet[num];
+  }
+};
+
+SMDS_NodeIteratorPtr SMDS_QuadraticFaceOfNodes::interlacedNodesIterator() const
+{
+  return SMDS_NodeIteratorPtr
+    (new SMDS_QuadraticFaceOfNodes_MyInterlacedNodeIterator(myNodes));
+}
+
+
+
+//=======================================================================
+//function : elementsIterator
+//purpose  : 
+//=======================================================================
+class SMDS_QuadraticFaceOfNodes_MyIterator:public SMDS_ElemIterator
+{
+  const std::vector<const SMDS_MeshNode *> mySet;
+  int index;
+ public:
+  SMDS_QuadraticFaceOfNodes_MyIterator(const std::vector<const SMDS_MeshNode *> s):
+    mySet(s),index(0) {}
+
+  bool more()
+  {
+    return index < mySet.size();
+  }
+
+  const SMDS_MeshElement* next()
+  {
+    index++;
+    return mySet[index-1];
+  }
+};
+
+SMDS_ElemIteratorPtr SMDS_QuadraticFaceOfNodes::elementsIterator
+                                         (SMDSAbs_ElementType type) const
+{
+  switch(type)
+  {
+  case SMDSAbs_Face:
+    return SMDS_MeshElement::elementsIterator(SMDSAbs_Face);
+  case SMDSAbs_Node:
+    return SMDS_ElemIteratorPtr(new SMDS_QuadraticFaceOfNodes_MyIterator(myNodes));
+  case SMDSAbs_Edge:
+    MESSAGE("Error : edge iterator for SMDS_QuadraticFaceOfNodes not implemented");
+    break;
+  default:
+    return SMDS_ElemIteratorPtr
+      (new SMDS_IteratorOfElements
+       (this,type,SMDS_ElemIteratorPtr
+        (new SMDS_QuadraticFaceOfNodes_MyIterator(myNodes))));
+  }
+  return SMDS_ElemIteratorPtr();
+}
diff --git a/src/SMDS/SMDS_QuadraticFaceOfNodes.hxx b/src/SMDS/SMDS_QuadraticFaceOfNodes.hxx
index bf699748c..8ce72f3fb 100644
--- a/src/SMDS/SMDS_QuadraticFaceOfNodes.hxx
+++ b/src/SMDS/SMDS_QuadraticFaceOfNodes.hxx
@@ -24,11 +24,14 @@
 //  File   : SMDS_QuadraticVolumeOfNodes.hxx
 //  Module : SMESH
 
-#ifndef _SMDS_QuadraticVolumeOfNodes_HeaderFile
-#define _SMDS_QuadraticVolumeOfNodes_HeaderFile
+#ifndef _SMDS_QuadraticFaceOfNodes_HeaderFile
+#define _SMDS_QuadraticFaceOfNodes_HeaderFile
 
 #include "SMDS_MeshFace.hxx"
 
+typedef SMDS_Iterator<const SMDS_MeshNode *> SMDS_NodeIterator;
+typedef boost::shared_ptr<SMDS_Iterator<const SMDS_MeshNode *> > SMDS_NodeIteratorPtr;
+
 class SMDS_WNT_EXPORT SMDS_QuadraticFaceOfNodes:public SMDS_MeshFace
 {
 public:
@@ -50,7 +53,7 @@ public:
 
   virtual bool IsQuadratic() const { return true; }
 
-  virtual bool IsMediumNode(class SMDS_MeshNode* node) const;
+  virtual bool IsMediumNode(const SMDS_MeshNode* node) const;
 
   bool ChangeNodes(const SMDS_MeshNode* nodes[],
                    const int            nbNodes);
diff --git a/src/SMDS/SMDS_QuadraticVolumeOfNodes.cxx b/src/SMDS/SMDS_QuadraticVolumeOfNodes.cxx
new file mode 100644
index 000000000..1da0c13bf
--- /dev/null
+++ b/src/SMDS/SMDS_QuadraticVolumeOfNodes.cxx
@@ -0,0 +1,329 @@
+// File:      SMDS_QuadraticVolumeOfNodes.cxx
+// Created:   17.01.06 09:46:11
+// Author:    Sergey KUUL
+// Copyright: Open CASCADE 2006
+
+#include "SMDS_QuadraticVolumeOfNodes.hxx"
+
+#include "SMDS_IteratorOfElements.hxx"
+#include "SMDS_MeshNode.hxx"
+
+#include "utilities.h"
+
+using namespace std;
+
+
+//=======================================================================
+//function : SMDS_QuadraticVolumeOfNodes()
+//purpose  : Constructor tetrahedron of 10 nodes
+//=======================================================================
+
+SMDS_QuadraticVolumeOfNodes::SMDS_QuadraticVolumeOfNodes
+                                               (const SMDS_MeshNode * n1,
+                                                const SMDS_MeshNode * n2,
+                                                const SMDS_MeshNode * n3,
+                                                const SMDS_MeshNode * n4,
+                                                const SMDS_MeshNode * n12,
+                                                const SMDS_MeshNode * n23,
+                                                const SMDS_MeshNode * n31,
+                                                const SMDS_MeshNode * n14, 
+                                                const SMDS_MeshNode * n24,
+                                                const SMDS_MeshNode * n34)
+{
+  myNodes.push_back(n1);
+  myNodes.push_back(n2);
+  myNodes.push_back(n3);
+  myNodes.push_back(n4);
+  myNodes.push_back(n12);
+  myNodes.push_back(n23);
+  myNodes.push_back(n31);
+  myNodes.push_back(n14);
+  myNodes.push_back(n24);
+  myNodes.push_back(n34);
+}
+
+
+//=======================================================================
+//function : SMDS_QuadraticVolumeOfNodes()
+//purpose  : Constructor pyramid of 13 nodes
+//=======================================================================
+
+SMDS_QuadraticVolumeOfNodes::SMDS_QuadraticVolumeOfNodes
+                                               (const SMDS_MeshNode * n1,
+                                                const SMDS_MeshNode * n2,
+                                                const SMDS_MeshNode * n3,
+                                                const SMDS_MeshNode * n4,
+                                                const SMDS_MeshNode * n5,
+                                                const SMDS_MeshNode * n12,
+                                                const SMDS_MeshNode * n23,
+                                                const SMDS_MeshNode * n34,
+                                                const SMDS_MeshNode * n41, 
+                                                const SMDS_MeshNode * n15,
+                                                const SMDS_MeshNode * n25,
+                                                const SMDS_MeshNode * n35,
+                                                const SMDS_MeshNode * n45)
+{
+  myNodes.push_back(n1);
+  myNodes.push_back(n2);
+  myNodes.push_back(n3);
+  myNodes.push_back(n4);
+  myNodes.push_back(n5);
+  myNodes.push_back(n12);
+  myNodes.push_back(n23);
+  myNodes.push_back(n34);
+  myNodes.push_back(n41);
+  myNodes.push_back(n15);
+  myNodes.push_back(n25);
+  myNodes.push_back(n35);
+  myNodes.push_back(n45);
+}
+
+
+//=======================================================================
+//function : SMDS_QuadraticVolumeOfNodes()
+//purpose  : Constructor Pentahedron with 15 nodes
+//=======================================================================
+
+SMDS_QuadraticVolumeOfNodes::SMDS_QuadraticVolumeOfNodes
+                                               (const SMDS_MeshNode * n1,
+                                                const SMDS_MeshNode * n2,
+                                                const SMDS_MeshNode * n3,
+                                                const SMDS_MeshNode * n4,
+                                                const SMDS_MeshNode * n5,
+                                                const SMDS_MeshNode * n6, 
+                                                const SMDS_MeshNode * n12,
+                                                const SMDS_MeshNode * n23,
+                                                const SMDS_MeshNode * n31, 
+                                                const SMDS_MeshNode * n45,
+                                                const SMDS_MeshNode * n56,
+                                                const SMDS_MeshNode * n64, 
+                                                const SMDS_MeshNode * n14,
+                                                const SMDS_MeshNode * n25,
+                                                const SMDS_MeshNode * n36)
+{
+  myNodes.push_back(n1);
+  myNodes.push_back(n2);
+  myNodes.push_back(n3);
+  myNodes.push_back(n4);
+  myNodes.push_back(n5);
+  myNodes.push_back(n6);
+  myNodes.push_back(n12);
+  myNodes.push_back(n23);
+  myNodes.push_back(n31);
+  myNodes.push_back(n45);
+  myNodes.push_back(n56);
+  myNodes.push_back(n64);
+  myNodes.push_back(n14);
+  myNodes.push_back(n25);
+  myNodes.push_back(n36);
+}
+
+
+//=======================================================================
+//function : SMDS_QuadraticVolumeOfNodes()
+//purpose  : Constructor Hexahedrons with 20 nodes
+//=======================================================================
+
+SMDS_QuadraticVolumeOfNodes::SMDS_QuadraticVolumeOfNodes
+                                               (const SMDS_MeshNode * n1,
+                                                const SMDS_MeshNode * n2,
+                                                const SMDS_MeshNode * n3,
+                                                const SMDS_MeshNode * n4,
+                                                const SMDS_MeshNode * n5,
+                                                const SMDS_MeshNode * n6,
+                                                const SMDS_MeshNode * n7,
+                                                const SMDS_MeshNode * n8, 
+                                                const SMDS_MeshNode * n12,
+                                                const SMDS_MeshNode * n23,
+                                                const SMDS_MeshNode * n34,
+                                                const SMDS_MeshNode * n41, 
+                                                const SMDS_MeshNode * n56,
+                                                const SMDS_MeshNode * n67,
+                                                const SMDS_MeshNode * n78,
+                                                const SMDS_MeshNode * n85, 
+                                                const SMDS_MeshNode * n15,
+                                                const SMDS_MeshNode * n26,
+                                                const SMDS_MeshNode * n37,
+                                                const SMDS_MeshNode * n48)
+{
+  myNodes.push_back(n1);
+  myNodes.push_back(n2);
+  myNodes.push_back(n3);
+  myNodes.push_back(n4);
+  myNodes.push_back(n5);
+  myNodes.push_back(n6);
+  myNodes.push_back(n7);
+  myNodes.push_back(n8);
+  myNodes.push_back(n12);
+  myNodes.push_back(n23);
+  myNodes.push_back(n34);
+  myNodes.push_back(n41);
+  myNodes.push_back(n56);
+  myNodes.push_back(n67);
+  myNodes.push_back(n78);
+  myNodes.push_back(n85);
+  myNodes.push_back(n15);
+  myNodes.push_back(n26);
+  myNodes.push_back(n37);
+  myNodes.push_back(n48);
+}
+
+
+//=======================================================================
+//function : IsMediumNode
+//purpose  : 
+//=======================================================================
+
+bool SMDS_QuadraticVolumeOfNodes::IsMediumNode(const SMDS_MeshNode* node) const
+{
+  if(NbNodes()==10) {
+    int i=4;
+    for(; i<10; i++) {
+      if(myNodes[i]==node) return true;
+    }
+  }
+  else if(NbNodes()==13) {
+    int i=5;
+    for(; i<13; i++) {
+      if(myNodes[i]==node) return true;
+    }
+  }
+  else if(NbNodes()==15) {
+    int i=6;
+    for(; i<15; i++) {
+      if(myNodes[i]==node) return true;
+    }
+  }
+  else {
+    int i=8;
+    for(; i<20; i++) {
+      if(myNodes[i]==node) return true;
+    }
+  }
+  return false;
+}
+
+
+//=======================================================================
+//function : ChangeNodes
+//purpose  : 
+//=======================================================================
+
+bool SMDS_QuadraticVolumeOfNodes::ChangeNodes(const SMDS_MeshNode* nodes[],
+                                              const int            nbNodes)
+{
+  if( nbNodes==10 || nbNodes==13 || nbNodes==15 || nbNodes==20 ) {
+    myNodes.resize(nbNodes);
+    int i=0;
+    for(; i<nbNodes; i++) {
+      myNodes[i] = nodes[i];
+    }
+    return true;
+  }
+  return false;
+}
+
+
+//=======================================================================
+//function : NbNodes
+//purpose  : 
+//=======================================================================
+int SMDS_QuadraticVolumeOfNodes::NbNodes() const
+{
+  return myNodes.size();
+}
+
+
+//=======================================================================
+//function : NbEdges
+//purpose  : 
+//=======================================================================
+int SMDS_QuadraticVolumeOfNodes::NbEdges() const
+{
+  if(NbNodes()==10)
+    return 6;
+  else if(NbNodes()==13)
+    return 8;
+  else if(NbNodes()==15)
+    return 9;
+  else
+    return 12;
+}
+
+
+//=======================================================================
+//function : NbFaces
+//purpose  : 
+//=======================================================================
+int SMDS_QuadraticVolumeOfNodes::NbFaces() const
+{
+  if(NbNodes()==10)
+    return 4;
+  else if(NbNodes()==20)
+    return 6;
+  else
+    return 5;
+}
+
+//=======================================================================
+//function : Print
+//purpose  : 
+//=======================================================================
+void SMDS_QuadraticVolumeOfNodes::Print(ostream & OS) const
+{
+  OS << "quadratic volume <" << GetID() << " > : ";
+  int i, nbNodes = myNodes.size();
+  for (i = 0; i < nbNodes - 1; i++)
+    OS << myNodes[i] << ",";
+  OS << myNodes[i] << ") " << endl;
+}
+
+
+//=======================================================================
+//function : elementsIterator
+//purpose  : 
+//=======================================================================
+class SMDS_QuadraticVolumeOfNodes_MyIterator:public SMDS_ElemIterator
+{
+  const std::vector<const SMDS_MeshNode *> mySet;
+  int index;
+ public:
+  SMDS_QuadraticVolumeOfNodes_MyIterator(const std::vector<const SMDS_MeshNode *> s):
+    mySet(s),index(0) {}
+
+  bool more()
+  {
+    return index < mySet.size();
+  }
+
+  const SMDS_MeshElement* next()
+  {
+    index++;
+    return mySet[index-1];
+  }
+};
+
+SMDS_ElemIteratorPtr SMDS_QuadraticVolumeOfNodes::elementsIterator
+                                         (SMDSAbs_ElementType type) const
+{
+  switch(type)
+  {
+  case SMDSAbs_Volume:
+    return SMDS_MeshElement::elementsIterator(SMDSAbs_Volume);
+  case SMDSAbs_Node:
+    return SMDS_ElemIteratorPtr(new SMDS_QuadraticVolumeOfNodes_MyIterator(myNodes));
+  case SMDSAbs_Edge:
+    MESSAGE("Error : edge iterator for SMDS_QuadraticVolumeOfNodes not implemented");
+    break;
+  case SMDSAbs_Face:
+    MESSAGE("Error : face iterator for SMDS_QuadraticVolumeOfNodes not implemented");
+    break;
+  default:
+    return SMDS_ElemIteratorPtr
+      (new SMDS_IteratorOfElements
+       (this,type,SMDS_ElemIteratorPtr
+        (new SMDS_QuadraticVolumeOfNodes_MyIterator(myNodes))));
+  }
+  return SMDS_ElemIteratorPtr();
+}
+
diff --git a/src/SMDS/SMDS_QuadraticVolumeOfNodes.hxx b/src/SMDS/SMDS_QuadraticVolumeOfNodes.hxx
index 9964f2fc8..7ab5c796b 100644
--- a/src/SMDS/SMDS_QuadraticVolumeOfNodes.hxx
+++ b/src/SMDS/SMDS_QuadraticVolumeOfNodes.hxx
@@ -29,7 +29,7 @@
 
 #include "SMDS_MeshVolume.hxx"
 
-class SMDS_WNT_EXPORT SMDS_QuadraticVolumeOfNodes:public SMDS_MeshVolume
+class SMDS_WNT_EXPORT SMDS_QuadraticVolumeOfNodes: public SMDS_MeshVolume
 {
 public:
   // tetrahedron of 10 nodes
@@ -41,8 +41,9 @@ public:
                                const SMDS_MeshNode * n23,
                                const SMDS_MeshNode * n31,
                                const SMDS_MeshNode * n14, 
-                               const SMDS_MeshNode * n23,
+                               const SMDS_MeshNode * n24,
                                const SMDS_MeshNode * n34);
+
   // pyramid of 13 nodes
   SMDS_QuadraticVolumeOfNodes(const SMDS_MeshNode * n1,
                               const SMDS_MeshNode * n2,
@@ -87,7 +88,7 @@ public:
                               const SMDS_MeshNode * n12,
                               const SMDS_MeshNode * n23,
                               const SMDS_MeshNode * n34,
-                              const SMDS_MeshNode * n51, 
+                              const SMDS_MeshNode * n41, 
                               const SMDS_MeshNode * n56,
                               const SMDS_MeshNode * n67,
                               const SMDS_MeshNode * n78,
@@ -99,7 +100,7 @@ public:
 
   virtual bool IsQuadratic() const { return true; }
 
-  virtual bool IsMediumNode(class SMDS_MeshNode* node) const;
+  virtual bool IsMediumNode(const SMDS_MeshNode* node) const;
 
   bool ChangeNodes(const SMDS_MeshNode* nodes[],
                    const int            nbNodes);