--- /dev/null
+// File : SMDS_VolumeTool.cxx
+// Created : Tue Jul 13 12:22:13 2004
+// Author : Edward AGAPOV (eap)
+// Copyright : Open CASCADE
+
+
+#include "SMDS_VolumeTool.hxx"
+
+#include "SMDS_MeshElement.hxx"
+#include "SMDS_MeshNode.hxx"
+#include <map>
+#include <float.h>
+
+using namespace std;
+
+/*
+// N3
+// +
+// /|\
+// / | \
+// / | \
+// N0 +---|---+ N2 TETRAHEDRON
+// \ | /
+// \ | /
+// \ | /
+// \|/
+// +
+// N1
+*/
+static int Tetra_F [4][4] = { // FORWARD == REVERSED EXTERNAL
+ { 0, 1, 2, 0 }, // Bottom face has an internal normal, other - external
+ { 0, 1, 3, 0 },
+ { 1, 2, 3, 1 },
+ { 0, 3, 2, 0 }};
+static int Tetra_R [4][4] = { // REVERSED == FORWARD EXTERNAL
+ { 0, 2, 1, 0 }, // All faces have external normals
+ { 0, 1, 3, 0 },
+ { 1, 2, 3, 1 },
+ { 0, 3, 2, 0 }};
+static int Tetra_nbN [] = { 3, 3, 3, 3 };
+
+/*
+// + N4
+// /|\
+// / | \
+// / | \
+// / | \
+// N3 +---------+ N5
+// | | |
+// | + N1 |
+// | / \ | PENTAHEDRON
+// | / \ |
+// | / \ |
+// |/ \|
+// N0 +---------+ N2
+*/
+static int Penta_F [5][5] = { // FORWARD
+ { 0, 1, 2, 0, 0 }, // Top face has an internal normal, other - external
+ { 3, 4, 5, 3, 3 }, // 0 is bottom, 1 is top face
+ { 0, 2, 5, 3, 0 },
+ { 1, 2, 5, 4, 1 },
+ { 1, 0, 3, 4, 1 }};
+static int Penta_R [5][5] = { // REVERSED
+ { 0, 2, 1, 0, 0 }, // Bottom face has an internal normal, other - external
+ { 3, 5, 4, 3, 3 }, // 0 is bottom, 1 is top face
+ { 0, 2, 5, 3, 0 },
+ { 1, 2, 5, 4, 1 },
+ { 1, 0, 3, 4, 1 }};
+static int Penta_FE [5][5] = { // EXTERNAL
+ { 0, 1, 2, 0, 0 },
+ { 3, 5, 4, 3, 3 },
+ { 0, 2, 5, 3, 0 },
+ { 1, 2, 5, 4, 1 },
+ { 1, 0, 3, 4, 1 }};
+static int Penta_RE [5][5] = { // REVERSED EXTERNAL
+ { 0, 0, 2, 1, 0 },
+ { 3, 3, 4, 5, 3 },
+ { 0, 2, 5, 3, 0 },
+ { 1, 2, 5, 4, 1 },
+ { 1, 0, 3, 4, 1 }};
+static int Penta_nbN [] = { 3, 3, 4, 4, 4 };
+
+/*
+// N7+----------+N6
+// /| /|
+// / | / |
+// / | / |
+// N4+----------+N5 |
+// | | | | HEXAHEDRON
+// | | | |
+// | | | |
+// | N3+------|---+N2
+// | / | /
+// | / | /
+// |/ |/
+// N0+----------+N1
+*/
+static int Hexa_F [6][5] = { // FORWARD
+ { 0, 1, 2, 3, 0 }, // opposite faces are neighbouring,
+ { 4, 5, 6, 7, 4 }, // even face normal is internal, odd - external
+ { 1, 0, 4, 5, 1 }, // same index nodes nodes of opposite faces are linked
+ { 2, 3, 7, 6, 2 },
+ { 0, 3, 7, 4, 0 },
+ { 1, 2, 6, 5, 1 }};
+static int Hexa_R [6][5] = { // REVERSED
+ { 0, 3, 2, 1, 0 }, // opposite faces are neighbouring,
+ { 4, 7, 6, 5, 4 }, // even face normal is external, odd - internal
+ { 1, 5, 4, 0, 1 }, // same index nodes nodes of opposite faces are linked
+ { 2, 6, 7, 3, 2 },
+ { 0, 4, 7, 3, 0 },
+ { 1, 5, 6, 2, 1 }};
+static int Hexa_FE [6][5] = { // EXTERNAL
+ { 0, 3, 2, 1, 0 }, // opposite faces are neighbouring,
+ { 4, 5, 6, 7, 4 }, // all face normals are external,
+ { 0, 1, 5, 4, 0 }, // links in opposite faces: 0-0, 1-3, 2-2, 3-1
+ { 3, 7, 6, 2, 3 },
+ { 1, 2, 6, 5, 1 },
+ { 0, 4, 7, 3, 0 }};
+static int Hexa_RE [6][5] = { // REVERSED EXTERNAL
+ { 0, 1, 2, 3, 0 }, // opposite faces are neighbouring,
+ { 4, 7, 6, 5, 4 }, // all face normals are external,
+ { 0, 1, 5, 4, 0 }, // links in opposite faces: 0-0, 1-3, 2-2, 3-1
+ { 3, 7, 6, 2, 3 },
+ { 1, 2, 6, 5, 1 },
+ { 0, 4, 7, 3, 0 }};
+static int Hexa_nbN [] = { 4, 4, 4, 4, 4, 4 };
+
+// ========================================================
+// to perform some calculations without linkage to CASCADE
+// ========================================================
+struct XYZ {
+ double x;
+ double y;
+ double z;
+ XYZ() { x = 0; y = 0; z = 0; }
+ XYZ( double X, double Y, double Z ) { x = X; y = Y; z = Z; }
+ XYZ( const XYZ& other ) { x = other.x; y = other.y; z = other.z; }
+ XYZ( const SMDS_MeshNode* n ) { x = n->X(); y = n->Y(); z = n->Z(); }
+ XYZ operator-( const XYZ& other );
+ XYZ Crossed( const XYZ& other );
+ double Dot( const XYZ& other );
+ double Magnitude();
+};
+XYZ XYZ::operator-( const XYZ& Right ) {
+ return XYZ(x - Right.x, y - Right.y, z - Right.z);
+}
+XYZ XYZ::Crossed( const XYZ& Right ) {
+ return XYZ (y * Right.z - z * Right.y,
+ z * Right.x - x * Right.z,
+ x * Right.y - y * Right.x);
+}
+double XYZ::Dot( const XYZ& Other ) {
+ return(x * Other.x + y * Other.y + z * Other.z);
+}
+double XYZ::Magnitude() {
+ return sqrt (x * x + y * y + z * z);
+}
+
+//=======================================================================
+//function : SMDS_VolumeTool
+//purpose :
+//=======================================================================
+
+SMDS_VolumeTool::SMDS_VolumeTool ()
+ : myVolume( 0 ),
+ myVolForward( true ),
+ myNbFaces( 0 ),
+ myVolumeNbNodes( 0 ),
+ myForwardFaces( false ),
+ myExternalFaces( false )
+{
+}
+//=======================================================================
+//function : SMDS_VolumeTool
+//purpose :
+//=======================================================================
+
+SMDS_VolumeTool::SMDS_VolumeTool (const SMDS_MeshElement* theVolume)
+ : myForwardFaces( false ),
+ myExternalFaces( false )
+{
+ Set( theVolume );
+}
+
+//=======================================================================
+//function : SMDS_VolumeTool
+//purpose :
+//=======================================================================
+
+SMDS_VolumeTool::~SMDS_VolumeTool()
+{
+}
+
+//=======================================================================
+//function : SetVolume
+//purpose : Set volume to iterate on
+//=======================================================================
+
+bool SMDS_VolumeTool::Set (const SMDS_MeshElement* theVolume)
+{
+ myVolume = 0;
+ myVolForward = true;
+ myCurFace = -1;
+ myVolumeNbNodes = 0;
+ myNbFaces = 0;
+ if ( theVolume && theVolume->GetType() == SMDSAbs_Volume )
+ {
+ myVolumeNbNodes = theVolume->NbNodes();
+ switch ( myVolumeNbNodes ) {
+ case 4:
+ case 6:
+ case 8:
+ {
+ myVolume = theVolume;
+ myNbFaces = theVolume->NbFaces();
+
+ // set volume nodes
+ int iNode = 0;
+ SMDS_ElemIteratorPtr nodeIt = myVolume->nodesIterator();
+ while ( nodeIt->more() )
+ myVolumeNodes[ iNode++ ] = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
+
+ // nb nodes in each face
+ if ( myVolumeNbNodes == 4 )
+ myFaceNbNodes = Tetra_nbN;
+ else if ( myVolumeNbNodes == 6 )
+ myFaceNbNodes = Penta_nbN;
+ else
+ myFaceNbNodes = Hexa_nbN;
+ break;
+ // define volume orientation
+ XYZ botNormal;
+ GetFaceNormal( 0, botNormal.x, botNormal.y, botNormal.z );
+ const SMDS_MeshNode* topNode = myVolumeNodes[ myVolumeNbNodes - 1 ];
+ const SMDS_MeshNode* botNode = myVolumeNodes[ 0 ];
+ XYZ upDir (topNode->X() - botNode->X(),
+ topNode->Y() - botNode->Y(),
+ topNode->Z() - botNode->Z() );
+ bool diffDir = ( botNormal.Dot( upDir ) < 0 );
+ myVolForward = ( myVolumeNbNodes == 6 ? diffDir : !diffDir );
+
+ }
+ default: myVolume = 0;
+ }
+ }
+ return ( myVolume != 0 );
+}
+
+//=======================================================================
+//function : GetInverseNodes
+//purpose : Return nodes vector of an inverse volume
+//=======================================================================
+
+#define SWAP_NODES(nodes,i1,i2) \
+{ \
+ const SMDS_MeshNode* tmp = nodes[ i1 ]; \
+ nodes[ i1 ] = nodes[ i2 ]; \
+ nodes[ i2 ] = tmp; \
+}
+void SMDS_VolumeTool::Inverse ()
+{
+ if ( !myVolume ) return;
+
+ myVolForward = !myVolForward;
+ myCurFace = -1;
+
+ // inverse top and bottom faces
+ switch ( myVolumeNbNodes ) {
+ case 4:
+ SWAP_NODES( myVolumeNodes, 1, 2 );
+ break;
+ case 6:
+ SWAP_NODES( myVolumeNodes, 1, 2 );
+ SWAP_NODES( myVolumeNodes, 4, 5 );
+ break;
+ case 8:
+ SWAP_NODES( myVolumeNodes, 1, 3 );
+ SWAP_NODES( myVolumeNodes, 5, 7 );
+ break;
+ default:;
+ }
+}
+
+//=======================================================================
+//function : GetSize
+//purpose : Return element volume
+//=======================================================================
+
+double SMDS_VolumeTool::GetSize() const
+{
+ return 0;
+}
+
+//=======================================================================
+//function : GetBaryCenter
+//purpose :
+//=======================================================================
+
+bool SMDS_VolumeTool::GetBaryCenter(double & X, double & Y, double & Z) const
+{
+ X = Y = Z = 0.;
+ if ( !myVolume )
+ return false;
+
+ for ( int i = 0; i < myVolumeNbNodes; i++ ) {
+ X += myVolumeNodes[ i ]->X();
+ Y += myVolumeNodes[ i ]->Y();
+ Z += myVolumeNodes[ i ]->Z();
+ }
+ X /= myVolumeNbNodes;
+ Y /= myVolumeNbNodes;
+ Z /= myVolumeNbNodes;
+
+ return true;
+}
+
+//=======================================================================
+//function : SetForwardOrientation
+//purpose : Node order will be as for forward orientation
+//=======================================================================
+
+void SMDS_VolumeTool::SetForwardOrientation ()
+{
+ myForwardFaces = true;
+}
+
+//=======================================================================
+//function : SetExternalNormal
+//purpose : Node order will be so that faces normals are external
+//=======================================================================
+
+void SMDS_VolumeTool::SetExternalNormal ()
+{
+ myExternalFaces = true;
+}
+
+//=======================================================================
+//function : NbFaceNodes
+//purpose : Return number of nodes in the array of face nodes
+//=======================================================================
+
+int SMDS_VolumeTool::NbFaceNodes( int faceIndex )
+{
+ if ( !setFace( faceIndex ))
+ return 0;
+ return myFaceNbNodes[ faceIndex ];
+}
+
+//=======================================================================
+//function : GetFaceNodes
+//purpose : Return pointer to the array of face nodes.
+// To comfort link iteration, the array
+// length == NbFaceNodes( faceIndex ) + 1 and
+// the last node == the first one.
+//=======================================================================
+
+const SMDS_MeshNode** SMDS_VolumeTool::GetFaceNodes( int faceIndex )
+{
+ if ( !setFace( faceIndex ))
+ return 0;
+ return myFaceNodes;
+}
+
+//=======================================================================
+//function : GetFaceNodesIndices
+//purpose : Return pointer to the array of face nodes indices
+// To comfort link iteration, the array
+// length == NbFaceNodes( faceIndex ) + 1 and
+// the last node index == the first one.
+//=======================================================================
+
+const int* SMDS_VolumeTool::GetFaceNodesIndices( int faceIndex )
+{
+ if ( !setFace( faceIndex ))
+ return 0;
+ return myFaceNodeIndices;
+}
+
+//=======================================================================
+//function : GetFaceNodes
+//purpose : Return a set of face nodes.
+//=======================================================================
+
+bool SMDS_VolumeTool::GetFaceNodes (int faceIndex,
+ std::set<const SMDS_MeshNode*>& theFaceNodes )
+{
+ if ( !setFace( faceIndex ))
+ return false;
+
+ theFaceNodes.clear();
+ int iNode, nbNode = myFaceNbNodes[ faceIndex ];
+ for ( int iNode = 0; iNode < nbNode; iNode++ )
+ theFaceNodes.insert( myFaceNodes[ iNode ]);
+
+ return true;
+}
+
+//=======================================================================
+//function : IsFaceExternal
+//purpose : Check normal orientation of a returned face
+//=======================================================================
+
+bool SMDS_VolumeTool::IsFaceExternal( int faceIndex )
+{
+ if ( myExternalFaces || !myVolume )
+ return true;
+
+ bool reversed = ( !myForwardFaces && !myVolForward );
+ switch ( myVolumeNbNodes ) {
+ case 4:
+ // only the bottom of a forward tetrahedron can be internal
+ return ( reversed || faceIndex != 0 );
+ case 6:
+ // in a forward pentahedron, the top is internal, in a reversed one - bottom
+ return ( reversed ? faceIndex != 0 : faceIndex != 1 );
+ case 8: {
+ // in a forward hexahedron, odd face normal is external, else vice versa
+ bool odd = faceIndex % 2;
+ return ( reversed ? !odd : odd );
+ }
+ default:;
+ }
+ return false;
+}
+
+//=======================================================================
+//function : GetFaceNormal
+//purpose : Return a normal to a face
+//=======================================================================
+
+bool SMDS_VolumeTool::GetFaceNormal (int faceIndex, double & X, double & Y, double & Z)
+{
+ if ( !setFace( faceIndex ))
+ return false;
+
+ XYZ p1 ( myFaceNodes[0] );
+ XYZ p2 ( myFaceNodes[1] );
+ XYZ p3 ( myFaceNodes[2] );
+ XYZ aVec12( p2 - p1 );
+ XYZ aVec13( p3 - p1 );
+ XYZ cross = aVec12.Crossed( aVec13 );
+
+ double size = cross.Magnitude();
+ if ( size <= DBL_MIN )
+ return false;
+
+ X = cross.x / size;
+ Y = cross.y / size;
+ Z = cross.z / size;
+
+ return true;
+}
+
+
+//=======================================================================
+//function : GetFaceArea
+//purpose : Return face area
+//=======================================================================
+
+double SMDS_VolumeTool::GetFaceArea( int faceIndex )
+{
+ if ( !setFace( faceIndex ))
+ return 0;
+
+ XYZ p1 ( myFaceNodes[0] );
+ XYZ p2 ( myFaceNodes[1] );
+ XYZ p3 ( myFaceNodes[2] );
+ XYZ aVec12( p2 - p1 );
+ XYZ aVec13( p3 - p1 );
+ double area = aVec12.Crossed( aVec13 ).Magnitude() * 0.5;
+
+ if ( myFaceNbNodes[ faceIndex ] == 4 ) {
+ XYZ p4 ( myFaceNodes[3] );
+ XYZ aVec14( p4 - p1 );
+ area += aVec14.Crossed( aVec13 ).Magnitude() * 0.5;
+ }
+ return area;
+}
+
+//=======================================================================
+//function : GetOppFaceIndex
+//purpose : Return index of the opposite face if it exists, else -1.
+//=======================================================================
+
+int SMDS_VolumeTool::GetOppFaceIndex( int faceIndex ) const
+{
+ int ind = -1;
+ if ( faceIndex >= 0 && faceIndex < NbFaces() ) {
+ switch ( myVolumeNbNodes ) {
+ case 6:
+ if ( faceIndex == 0 || faceIndex == 1 )
+ ind = 1 - faceIndex;
+ break;
+ case 8:
+ ind = faceIndex + ( faceIndex % 2 ? -1 : 1 );
+ break;
+ default:;
+ }
+ }
+ return ind;
+}
+
+//=======================================================================
+//function : IsLinked
+//purpose : return true if theNode1 is linked with theNode2
+//=======================================================================
+
+bool SMDS_VolumeTool::IsLinked (const SMDS_MeshNode* theNode1,
+ const SMDS_MeshNode* theNode2) const
+{
+ if ( !myVolume )
+ return false;
+
+ // find nodes indices
+ int i1 = -1, i2 = -1;
+ for ( int i = 0; i < myVolumeNbNodes; i++ ) {
+ if ( myVolumeNodes[ i ] == theNode1 )
+ i1 = i;
+ else if ( myVolumeNodes[ i ] == theNode2 )
+ i2 = i;
+ }
+ return IsLinked( i1, i2 );
+}
+
+//=======================================================================
+//function : IsLinked
+//purpose : return true if the node with theNode1Index is linked
+// with the node with theNode2Index
+//=======================================================================
+
+bool SMDS_VolumeTool::IsLinked (const int theNode1Index,
+ const int theNode2Index) const
+{
+ int minInd = theNode1Index < theNode2Index ? theNode1Index : theNode2Index;
+ int maxInd = theNode1Index < theNode2Index ? theNode2Index : theNode1Index;
+
+ if ( minInd < 0 || maxInd > myVolumeNbNodes - 1 || maxInd == minInd )
+ return false;
+
+ switch ( myVolumeNbNodes ) {
+ case 4:
+ return true;
+ case 6:
+ switch ( maxInd - minInd ) {
+ case 1: return minInd != 2;
+ case 2: return minInd == 0 || minInd == 3;
+ case 3: return true;
+ default:;
+ }
+ break;
+ case 8:
+ switch ( maxInd - minInd ) {
+ case 1: return minInd != 3;
+ case 3: return minInd == 0 || minInd == 4;
+ case 4: return true;
+ default:;
+ }
+ break;
+ default:;
+ }
+ return false;
+}
+
+//=======================================================================
+//function : GetNodeIndex
+//purpose : Return an index of theNode
+//=======================================================================
+
+int SMDS_VolumeTool::GetNodeIndex(const SMDS_MeshNode* theNode) const
+{
+ if ( myVolume ) {
+ for ( int i = 0; i < myVolumeNbNodes; i++ ) {
+ if ( myVolumeNodes[ i ] == theNode )
+ return i;
+ }
+ }
+ return -1;
+}
+
+
+//=======================================================================
+//function : IsFreeFace
+//purpose : check that only one volume is build on the face nodes
+//=======================================================================
+
+bool SMDS_VolumeTool::IsFreeFace( int faceIndex )
+{
+ const int free = true;
+ if ( !setFace( faceIndex ))
+ return !free;
+
+ const SMDS_MeshNode** nodes = GetFaceNodes( faceIndex );
+ int nbFaceNodes = NbFaceNodes( faceIndex );
+
+ // evaluate nb of face nodes shared by other volume
+ int maxNbShared = -1;
+ typedef map< const SMDS_MeshElement*, int > TElemIntMap;
+ TElemIntMap volNbShared;
+ TElemIntMap::iterator vNbIt;
+ for ( int iNode = 0; iNode < nbFaceNodes; iNode++ )
+ {
+ const SMDS_MeshNode* n = nodes[ iNode ];
+ SMDS_ElemIteratorPtr eIt = n->GetInverseElementIterator();
+ while ( eIt->more() ) {
+ const SMDS_MeshElement* elem = eIt->next();
+ if ( elem != myVolume && elem->GetType() == SMDSAbs_Volume ) {
+ int nbShared = 1;
+ vNbIt = volNbShared.find( elem );
+ if ( vNbIt == volNbShared.end() )
+ volNbShared.insert ( TElemIntMap::value_type( elem, nbShared ));
+ else
+ nbShared = ++(*vNbIt).second;
+ if ( nbShared > maxNbShared )
+ maxNbShared = nbShared;
+ }
+ }
+ }
+ if ( maxNbShared < 3 )
+ return free; // is free
+
+ // find volumes laying on the opposite side of the face
+ // and sharing all nodes
+ XYZ intNormal; // internal normal
+ GetFaceNormal( faceIndex, intNormal.x, intNormal.y, intNormal.z );
+ if ( IsFaceExternal( faceIndex ))
+ intNormal = XYZ( -intNormal.x, -intNormal.y, -intNormal.z );
+ XYZ p0 ( nodes[0] ), baryCenter;
+ for ( vNbIt = volNbShared.begin(); vNbIt != volNbShared.end(); vNbIt++ )
+ {
+ int nbShared = (*vNbIt).second;
+ if ( nbShared >= 3 ) {
+ SMDS_VolumeTool volume( (*vNbIt).first );
+ volume.GetBaryCenter( baryCenter.x, baryCenter.y, baryCenter.z );
+ XYZ intNormal2( baryCenter - p0 );
+ if ( intNormal.Dot( intNormal2 ) < 0 )
+ continue; // opposite side
+ }
+ // remove a volume from volNbShared map
+ volNbShared.erase( vNbIt );
+ }
+ // here volNbShared contains only volumes laying on the
+ // opposite side of the face
+ if ( volNbShared.empty() )
+ return free; // is free
+
+ // check if the whole area of a face is shared
+ bool isShared[] = { false, false, false, false }; // 4 triangle parts of a quadrangle
+ for ( vNbIt = volNbShared.begin(); vNbIt != volNbShared.end(); vNbIt++ )
+ {
+ SMDS_VolumeTool volume( (*vNbIt).first );
+ bool prevLinkShared = false;
+ int nbSharedLinks = 0;
+ for ( int iNode = 0; iNode < nbFaceNodes; iNode++ )
+ {
+ bool linkShared = volume.IsLinked( nodes[ iNode ], nodes[ iNode + 1] );
+ if ( linkShared )
+ nbSharedLinks++;
+ if ( linkShared && prevLinkShared &&
+ volume.IsLinked( nodes[ iNode - 1 ], nodes[ iNode + 1] ))
+ isShared[ iNode ] = true;
+ prevLinkShared = linkShared;
+ }
+ if ( nbSharedLinks == nbFaceNodes )
+ return !free; // is not free
+ if ( nbFaceNodes == 4 ) {
+ // check traingle parts 1 & 3
+ if ( isShared[1] && isShared[3] )
+ return !free; // is not free
+ // check traingle parts 0 & 2;
+ // 0 part could not be checked in the loop; check it here
+ if ( isShared[2] && prevLinkShared &&
+ volume.IsLinked( nodes[ 0 ], nodes[ 1 ] ) &&
+ volume.IsLinked( nodes[ 1 ], nodes[ 3 ] ) )
+ return !free; // is not free
+ }
+ }
+ return free;
+}
+
+//=======================================================================
+//function : GetFaceIndex
+//purpose : Return index of a face formed by theFaceNodes
+//=======================================================================
+
+int SMDS_VolumeTool::GetFaceIndex( const set<const SMDS_MeshNode*>& theFaceNodes )
+{
+ for ( int iFace = 0; iFace < myNbFaces; iFace++ ) {
+ const SMDS_MeshNode** nodes = GetFaceNodes( iFace );
+ int nbFaceNodes = NbFaceNodes( iFace );
+ set<const SMDS_MeshNode*> nodeSet;
+ for ( int iNode = 0; iNode < nbFaceNodes; iNode++ )
+ nodeSet.insert( nodes[ iNode ] );
+ if ( theFaceNodes == nodeSet )
+ return iFace;
+ }
+ return -1;
+}
+
+//=======================================================================
+//function : GetFaceIndex
+//purpose : Return index of a face formed by theFaceNodes
+//=======================================================================
+
+int SMDS_VolumeTool::GetFaceIndex( const set<int>& theFaceNodesIndices )
+{
+ for ( int iFace = 0; iFace < myNbFaces; iFace++ ) {
+ const int* nodes = GetFaceNodesIndices( iFace );
+ int nbFaceNodes = NbFaceNodes( iFace );
+ set<int> nodeSet;
+ for ( int iNode = 0; iNode < nbFaceNodes; iNode++ )
+ nodeSet.insert( nodes[ iNode ] );
+ if ( theFaceNodesIndices == nodeSet )
+ return iFace;
+ }
+ return -1;
+}
+
+//=======================================================================
+//function : setFace
+//purpose :
+//=======================================================================
+
+bool SMDS_VolumeTool::setFace( int faceIndex )
+{
+ if ( !myVolume )
+ return false;
+
+ if ( myCurFace == faceIndex )
+ return true;
+
+ if ( faceIndex < 0 || faceIndex >= NbFaces() )
+ return false;
+
+ // choose face node indices
+ switch ( myVolumeNbNodes ) {
+ case 4:
+ if ( myExternalFaces )
+ myFaceNodeIndices = myVolForward ? Tetra_R[ faceIndex ] : Tetra_F[ faceIndex ];
+ else if ( myForwardFaces )
+ myFaceNodeIndices = myVolForward ? Tetra_F[ faceIndex ] : Tetra_R[ faceIndex ];
+ else
+ myFaceNodeIndices = Tetra_F[ faceIndex ];
+ break;
+ case 6:
+ if ( myExternalFaces )
+ myFaceNodeIndices = myVolForward ? Penta_FE[ faceIndex ] : Penta_RE[ faceIndex ];
+ else if ( myForwardFaces )
+ myFaceNodeIndices = myVolForward ? Penta_F[ faceIndex ] : Penta_R[ faceIndex ];
+ else
+ myFaceNodeIndices = Penta_F[ faceIndex ];
+ break;
+ case 8:
+ if ( myExternalFaces )
+ myFaceNodeIndices = myVolForward ? Hexa_FE[ faceIndex ] : Hexa_RE[ faceIndex ];
+ else if ( myForwardFaces )
+ myFaceNodeIndices = myVolForward ? Hexa_F[ faceIndex ] : Hexa_R[ faceIndex ];
+ else
+ myFaceNodeIndices = Hexa_F[ faceIndex ];
+ break;
+ default: return false;
+ }
+
+ // set face nodes
+ int iNode, nbNode = myFaceNbNodes[ faceIndex ];
+ for ( iNode = 0; iNode <= nbNode; iNode++ )
+ myFaceNodes[ iNode ] = myVolumeNodes[ myFaceNodeIndices[ iNode ]];
+
+ myCurFace = faceIndex;
+
+ return true;
+}
