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0021859: SMESH : Add conversion from QUAD8 to QUAD9 and from HEXA20 to HEXA27

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+  inline static gp_XY calcTFI(double x, double y, ...
+  void SetIsBiQuadratic(const bool theBuildBiQuadratic);
+  const SMDS_MeshNode* GetCentralNode(const SMDS_MeshNode* n1, ...

+  std::map< TBiQuad, SMDS_MeshNode* > myMapWithCentralNode; // central nodes of faces
+  bool            myCreateBiQuadratic;
This commit is contained in:
eap 2013-03-06 08:14:30 +00:00
parent b3b654c67b
commit f2d9abb577
2 changed files with 502 additions and 50 deletions
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426
src/SMESH/SMESH_MesherHelper.cxx
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@ -81,7 +81,11 @@ namespace {
//================================================================================
SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
: myParIndex(0), myMesh(&theMesh), myShapeID(0), myCreateQuadratic(false),
: myParIndex(0),
myMesh(&theMesh),
myShapeID(0),
myCreateQuadratic(false),
myCreateBiQuadratic(false),
myFixNodeParameters(false)
{
myPar1[0] = myPar2[0] = myPar1[1] = myPar2[1] = 0;
@ -1016,9 +1020,157 @@ SMESH_MesherHelper::GetMediumPos(const SMDS_MeshNode* n1,
return make_pair( shapeID, shapeType );
}
//=======================================================================
//function : GetCentralNode
//purpose : Return existing or create a new central node for a quardilateral
// quadratic face given its 8 nodes.
//@param : force3d - true means node creation in between the given nodes,
// else node position is found on a geometrical face if any.
//=======================================================================
const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(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,
bool force3d)
{
SMDS_MeshNode *centralNode = 0; // central node to return
// Find an existing central node
TBiQuad keyOfMap(n1,n2,n3,n4);
std::map<TBiQuad, SMDS_MeshNode* >::iterator itMapCentralNode;
itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
if ( itMapCentralNode != myMapWithCentralNode.end() )
{
return (*itMapCentralNode).second;
}
// Get type of shape for the new central node
TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
int shapeID = -1;
int faceID = -1;
TopoDS_Shape shape;
TopTools_ListIteratorOfListOfShape it;
std::map< int, int > faceId2nbNodes;
std::map< int, int > ::iterator itMapWithIdFace;
SMESHDS_Mesh* meshDS = GetMeshDS();
// check if a face lie on a FACE, i.e. its all corner nodes lie either on the FACE or
// on sub-shapes of the FACE
if ( GetMesh()->HasShapeToMesh() )
{
const SMDS_MeshNode* nodes[] = { n1, n2, n3, n4 };
for(int i = 0; i < 4; i++)
{
shape = GetSubShapeByNode( nodes[i], meshDS );
if ( shape.IsNull() ) break;
if ( shape.ShapeType() == TopAbs_SOLID )
{
shapeID = nodes[i]->getshapeId();
shapeType = TopAbs_SOLID;
break;
}
if ( shape.ShapeType() == TopAbs_FACE )
{
faceID = nodes[i]->getshapeId();
itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
itMapWithIdFace->second++;
}
else
{
PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
while ( const TopoDS_Shape* face = it->next() )
{
faceID = meshDS->ShapeToIndex( *face );
itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
itMapWithIdFace->second++;
}
}
}
}
if ( shapeID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
{
// find ID of the FACE the four corner nodes belong to
itMapWithIdFace = faceId2nbNodes.begin();
for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
{
if ( itMapWithIdFace->second == 4 )
{
shapeType = TopAbs_FACE;
faceID = (*itMapWithIdFace).first;
break;
}
}
}
TopoDS_Face F;
if ( shapeType == TopAbs_FACE )
{
F = TopoDS::Face( meshDS->IndexToShape( faceID ));
}
// Create a node
gp_XY uvAvg;
gp_Pnt P;
if ( !F.IsNull() )
{
if ( !force3d )
{
uvAvg = calcTFI (0.5, 0.5,
GetNodeUV(F,n1,n3), GetNodeUV(F,n2,n4),
GetNodeUV(F,n3,n1), GetNodeUV(F,n4,n2),
GetNodeUV(F,n12,n3), GetNodeUV(F,n23,n4),
GetNodeUV(F,n34,n2), GetNodeUV(F,n41,n2));
TopLoc_Location loc;
Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
if ( mySetElemOnShape )
meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
return centralNode;
}
}
P = ( SMESH_TNodeXYZ( n1 ) +
SMESH_TNodeXYZ( n2 ) +
SMESH_TNodeXYZ( n3 ) +
SMESH_TNodeXYZ( n4 ) ) / 4;
centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
if ( mySetElemOnShape )
{
if ( !F.IsNull() )
{
uvAvg = (GetNodeUV(F,n1,n3) +
GetNodeUV(F,n2,n4) +
GetNodeUV(F,n3,n1) +
GetNodeUV(F,n4,n2)) / 4;
CheckNodeUV( F, centralNode, uvAvg, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
}
else if ( shapeID > 0 )
meshDS->SetNodeInVolume( centralNode, shapeID );
else if ( myShapeID > 0 )
meshDS->SetMeshElementOnShape( centralNode, myShapeID );
}
myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
return centralNode;
}
//=======================================================================
//function : GetMediumNode
//purpose : Return existing or create new medium nodes between given ones
//purpose : Return existing or create a new medium node between given ones
//=======================================================================
const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
@ -1095,7 +1247,8 @@ const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
if ( mySetElemOnShape )
meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
myTLinkNodeMap.insert(make_pair(link,n12));
return n12;
}
@ -1119,7 +1272,8 @@ const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
gp_Pnt P = C->Value( U );
n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
meshDS->SetNodeOnEdge(n12, edgeID, U);
if ( mySetElemOnShape )
meshDS->SetNodeOnEdge(n12, edgeID, U);
myTLinkNodeMap.insert(make_pair(link,n12));
return n12;
}
@ -1132,21 +1286,24 @@ const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
double z = ( n1->Z() + n2->Z() )/2.;
n12 = meshDS->AddNode(x,y,z);
if ( !F.IsNull() )
if ( mySetElemOnShape )
{
gp_XY UV = ( uv[0] + uv[1] ) / 2.;
CheckNodeUV( F, n12, UV, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
}
else if ( !E.IsNull() )
{
double U = ( u[0] + u[1] ) / 2.;
CheckNodeU( E, n12, U, 2*BRep_Tool::Tolerance( E ), /*force=*/true);
meshDS->SetNodeOnEdge(n12, edgeID, U);
}
else if ( myShapeID > 0 )
{
meshDS->SetNodeInVolume(n12, myShapeID);
if ( !F.IsNull() )
{
gp_XY UV = ( uv[0] + uv[1] ) / 2.;
CheckNodeUV( F, n12, UV, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
}
else if ( !E.IsNull() )
{
double U = ( u[0] + u[1] ) / 2.;
CheckNodeU( E, n12, U, 2*BRep_Tool::Tolerance( E ), /*force=*/true);
meshDS->SetNodeOnEdge(n12, edgeID, U);
}
else if ( myShapeID > 0 )
{
meshDS->SetMeshElementOnShape(n12, myShapeID);
}
}
myTLinkNodeMap.insert( make_pair( link, n12 ));
@ -1218,7 +1375,8 @@ const SMDS_MeshNode* SMESH_MesherHelper::getMediumNodeOnComposedWire(const SMDS_
GetMeshDS()->MoveNode( n12, p.X(), p.Y(), p.Z() );
}
GetMeshDS()->SetNodeOnEdge(n12, edges[iOkEdge], u);
if ( mySetElemOnShape )
GetMeshDS()->SetNodeOnEdge(n12, edges[iOkEdge], u);
myTLinkNodeMap.insert( make_pair( SMESH_TLink(n1,n2), n12 ));
@ -1326,7 +1484,7 @@ SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
//=======================================================================
//function : AddFace
//purpose : Creates quadratic or linear quadrangle
//purpose : Creates bi-quadratic, quadratic or linear quadrangle
//=======================================================================
SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
@ -1369,11 +1527,21 @@ SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
if(id)
elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
if(myCreateBiQuadratic)
{
const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n4, n12, n23, n34, n41, force3d);
if(id)
elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, nCenter, id);
else
elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41, nCenter);
}
else
elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
{
if(id)
elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
else
elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
}
}
if ( mySetElemOnShape && myShapeID > 0 )
meshDS->SetMeshElementOnShape( elem, myShapeID );
@ -1557,7 +1725,7 @@ SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
//=======================================================================
//function : AddVolume
//purpose : Creates quadratic or linear hexahedron
//purpose : Creates bi-quadratic, quadratic or linear hexahedron
//=======================================================================
SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
@ -1594,15 +1762,75 @@ SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n26 = GetMediumNode(n2,n6,force3d);
const SMDS_MeshNode* n37 = GetMediumNode(n3,n7,force3d);
const SMDS_MeshNode* n48 = GetMediumNode(n4,n8,force3d);
if(myCreateBiQuadratic)
{
const SMDS_MeshNode* n1234 = GetCentralNode(n1,n2,n3,n4,n12,n23,n34,n41,force3d);
const SMDS_MeshNode* n1256 = GetCentralNode(n1,n2,n5,n6,n12,n26,n56,n15,force3d);
const SMDS_MeshNode* n2367 = GetCentralNode(n2,n3,n6,n7,n23,n37,n67,n26,force3d);
const SMDS_MeshNode* n3478 = GetCentralNode(n3,n4,n7,n8,n34,n48,n78,n37,force3d);
const SMDS_MeshNode* n1458 = GetCentralNode(n1,n4,n5,n8,n41,n48,n15,n85,force3d);
const SMDS_MeshNode* n5678 = GetCentralNode(n5,n6,n7,n8,n56,n67,n78,n85,force3d);
if(id)
elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48, id);
vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( n4 );
pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( n8 );
pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( n3 );
pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( n7 );
pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( n1 );
pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( n5 );
pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( n2 );
pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( n6 );
pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( n48 );
pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( n37 );
pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( n15 );
pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( n26 );
pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( n34 );
pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( n78 );
pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( n12 );
pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( n56 );
pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( n41 );
pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( n85 );
pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( n23 );
pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( n67 );
pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( n3478 );
pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( n1256 );
pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( n1458 );
pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( n2367 );
pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( n1234 );
pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( n5678 );
gp_XYZ centerCube(0.5, 0.5, 0.5);
gp_XYZ nCenterElem;
SMESH_Block::ShellPoint( centerCube, pointsOnShapes, nCenterElem );
const SMDS_MeshNode* nCenter =
meshDS->AddNode( nCenterElem.X(), nCenterElem.Y(), nCenterElem.Z() );
meshDS->SetNodeInVolume( nCenter, myShapeID );
if(id)
elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48,
n1234, n1256, n2367, n3478, n1458, n5678, nCenter, id);
else
elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48,
n1234, n1256, n2367, n3478, n1458, n5678, nCenter);
}
else
elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48);
{
if(id)
elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48, id);
else
elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48);
}
}
if ( mySetElemOnShape && myShapeID > 0 )
meshDS->SetMeshElementOnShape( elem, myShapeID );
@ -2504,7 +2732,7 @@ namespace { // Structures used by FixQuadraticElements()
enum { ERR_OK, ERR_TRI, ERR_PRISM, ERR_UNKNOWN }; // errors of QFace::GetLinkChain()
// --------------------------------------------------------------------
/*!
* \brief Face shared by two volumes and bound by QLinks
* \brief Quadratic face shared by two volumes and bound by QLinks
*/
struct QFace: public TIDSortedNodeSet
{
@ -3873,11 +4101,13 @@ void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
// 3. Compute displacement of medium nodes
// ---------------------------------------
// two loops on QFaces: the first is to treat boundary links, the second is for internal ones
// two loops on QFaces: the first is to treat boundary links, the second is for internal ones.
TopLoc_Location loc;
// not treat boundary of volumic submesh
bool checkUV;
// not to treat boundary of volumic sub-mesh.
int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0;
for ( ; isInside < 2; ++isInside ) {
for ( ; isInside < 2; ++isInside )
{
MSG( "--------------- LOOP (inside=" << isInside << ") ------------------");
SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE;
SMDS_TypeOfPosition bndPos = isInside ? SMDS_TOP_FACE : SMDS_TOP_EDGE;
@ -3952,7 +4182,6 @@ void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
gp_Vec move1 = chain.back ()->_nodeMove;
TopoDS_Face face;
bool checkUV = true;
if ( !isInside )
{
// compute node displacement of end links of chain in parametric space of face
@ -4065,10 +4294,131 @@ void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
// 4. Move nodes
// -------------
TIDSortedElemSet biQuadQuas, triQuadHexa;
const SMDS_MeshElement *biQuadQua, *triQuadHex;
const bool toFixCentralNodes = ( myMesh->NbBiQuadQuadrangles() +
myMesh->NbTriQuadraticHexas() );
for ( pLink = links.begin(); pLink != links.end(); ++pLink ) {
if ( pLink->IsMoved() ) {
if ( pLink->IsMoved() )
{
gp_Pnt p = pLink->MiddlePnt() + pLink->Move();
GetMeshDS()->MoveNode( pLink->_mediumNode, p.X(), p.Y(), p.Z());
// collect bi-quadratic elements
if ( toFixCentralNodes )
{
biQuadQua = triQuadHex = 0;
SMDS_ElemIteratorPtr eIt = pLink->_mediumNode->GetInverseElementIterator();
while ( eIt->more() )
{
const SMDS_MeshElement* e = eIt->next();
SMDSAbs_EntityType type = e->GetEntityType();
if ( type == SMDSEntity_BiQuad_Quadrangle )
biQuadQuas.insert( e );
else if ( type == SMDSEntity_TriQuad_Hexa )
triQuadHexa.insert( e );
}
}
}
}
// Fix positions of central nodes of bi-tri-quadratic elements
// treat bi-quad quadrangles
{
vector< const SMDS_MeshNode* > nodes( 9 );
gp_XY uv[ 9 ];
//TIDSortedNodeSet checkedNodes;
TIDSortedElemSet::iterator quadIt = biQuadQuas.begin();
for ( ; quadIt != biQuadQuas.end(); ++quadIt )
{
const SMDS_MeshElement* quad = *quadIt;
// nodes
nodes.clear();
nodes.assign( quad->begin_nodes(), quad->end_nodes() );
// FACE
TopoDS_Shape S = GetSubShapeByNode( nodes.back(), GetMeshDS() );
if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
const TopoDS_Face& F = TopoDS::Face( S );
Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
const double tol = BRep_Tool::Tolerance( F );
// UV
for ( int i = 0; i < 8; ++i )
{
uv[ i ] = GetNodeUV( F, nodes[i], nodes[8], &checkUV );
// as this method is used after mesh generation, UV of nodes is not
// updated according to bending links, so we update
if ( i > 3 && nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
}
// move central node
gp_XY uvCent = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3],uv[4],uv[5],uv[6],uv[7] );
gp_Pnt p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
GetMeshDS()->MoveNode( nodes[8], p.X(), p.Y(), p.Z());
}
}
// treat tri-quadratic hexahedra
{
SMDS_VolumeTool volExp;
TIDSortedElemSet::iterator hexIt = triQuadHexa.begin();
for ( ; hexIt != triQuadHexa.end(); ++hexIt )
{
volExp.Set( *hexIt, /*ignoreCentralNodes=*/false );
// fix nodes central in sides
for ( int iQuad = 0; iQuad < volExp.NbFaces(); ++iQuad )
{
const SMDS_MeshNode** quadNodes = volExp.GetFaceNodes( iQuad );
if ( quadNodes[8]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
{
gp_XYZ p = calcTFI( 0.5, 0.5,
SMESH_TNodeXYZ( quadNodes[0] ), SMESH_TNodeXYZ( quadNodes[2] ),
SMESH_TNodeXYZ( quadNodes[4] ), SMESH_TNodeXYZ( quadNodes[6] ),
SMESH_TNodeXYZ( quadNodes[1] ), SMESH_TNodeXYZ( quadNodes[3] ),
SMESH_TNodeXYZ( quadNodes[5] ), SMESH_TNodeXYZ( quadNodes[7] ));
GetMeshDS()->MoveNode( quadNodes[8], p.X(), p.Y(), p.Z());
}
}
// fix the volume central node
vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
const SMDS_MeshNode** hexNodes = volExp.GetNodes();
pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( hexNodes[ 0 ] );
pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( hexNodes[ 3 ] );
pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( hexNodes[ 1 ] );
pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( hexNodes[ 2 ] );
pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( hexNodes[ 4 ] );
pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( hexNodes[ 7 ] );
pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( hexNodes[ 5 ] );
pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( hexNodes[ 6 ] );
pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( hexNodes[ 11 ] );
pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( hexNodes[ 9 ] );
pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( hexNodes[ 8 ] );
pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( hexNodes[ 10 ] );
pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( hexNodes[ 15 ] );
pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( hexNodes[ 13 ] );
pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( hexNodes[ 12 ] );
pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( hexNodes[ 14 ] );
pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( hexNodes[ 16 ] );
pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( hexNodes[ 19 ] );
pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( hexNodes[ 17 ] );
pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( hexNodes[ 18 ] );
pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( hexNodes[ 20 ] );
pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( hexNodes[ 25 ] );
pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( hexNodes[ 21 ] );
pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( hexNodes[ 23 ] );
pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( hexNodes[ 24 ] );
pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( hexNodes[ 22 ] );
gp_XYZ nCenterParams(0.5, 0.5, 0.5), nCenterCoords;
SMESH_Block::ShellPoint( nCenterParams, pointsOnShapes, nCenterCoords );
GetMeshDS()->MoveNode( hexNodes[26],
nCenterCoords.X(), nCenterCoords.Y(), nCenterCoords.Z());
}
}

126
src/SMESH/SMESH_MesherHelper.hxx
View File

@ -72,7 +72,7 @@ typedef gp_XY (*xyFunPtr)(const gp_XY& uv1, const gp_XY& uv2);
class SMESH_EXPORT SMESH_MesherHelper
{
public:
public:
// ---------- PUBLIC UTILITIES ----------
/*!
@ -146,6 +146,36 @@ public:
return ind;
}
/*!
* \brief Return UV of a point inside a quadrilateral FACE by it's
* normalized parameters within a unit quadrangle and the
* corresponding projections on sub-shapes of the real-world FACE.
* The used calculation method is called Trans-Finite Interpolation (TFI).
* \param x,y - normalized parameters that should be in range [0,1]
* \param a0,a1,a2,a3 - UV of VERTEXes of the FACE == projections on VERTEXes
* \param p0,p1,p2,p3 - UV of the point projections on EDGEs of the FACE
* \return gp_XY - UV of the point on the FACE
*
* Order of those UV in the FACE is as follows.
* a4 p3 a3
* o---x-----o
* | : |
* | :UV |
* p4 x...O.....x p2
* | : |
* o---x-----o
* a1 p1 a2
*/
inline static gp_XY calcTFI(double x, double y,
const gp_XY a0,const gp_XY a1,const gp_XY a2,const gp_XY a3,
const gp_XY p0,const gp_XY p1,const gp_XY p2,const gp_XY p3);
/*!
* \brief Same as "gp_XY calcTFI(...)" but in 3D
*/
inline static gp_XYZ calcTFI(double x, double y,
const gp_XYZ a0,const gp_XYZ a1,const gp_XYZ a2,const gp_XYZ a3,
const gp_XYZ p0,const gp_XYZ p1,const gp_XYZ p2,const gp_XYZ p3);
/*!
* \brief Count nb of sub-shapes
* \param shape - the shape
@ -214,8 +244,19 @@ public:
/*!
* \brief Set order of elements to create without calling IsQuadraticSubMesh()
*/
/*!
* \brief Set myCreateQuadratic flag
*/
void SetIsQuadratic(const bool theBuildQuadratic)
{ myCreateQuadratic = theBuildQuadratic; }
/*!
* \brief Set myCreateBiQuadratic flag
*/
void SetIsBiQuadratic(const bool theBuildBiQuadratic)
{ myCreateBiQuadratic = theBuildBiQuadratic; }
/*!
* \brief Return myCreateQuadratic flag
*/
@ -226,6 +267,11 @@ public:
*/
bool IsReversedSubMesh (const TopoDS_Face& theFace);
/*!
* \brief Return myCreateBiQuadratic flag
*/
bool GetIsBiQuadratic() const { return myCreateBiQuadratic; }
/*!
* \brief Move medium nodes of faces and volumes to fix distorted elements
* \param error - container of fixed distorted elements
@ -276,7 +322,7 @@ public:
const int id=0,
const bool force3d = false);
/*!
* Creates quadratic or linear quadrangle
* Creates bi-quadratic, quadratic or linear quadrangle
*/
SMDS_MeshFace* AddFace(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
@ -284,7 +330,6 @@ public:
const SMDS_MeshNode* n4,
const int id = 0,
const bool force3d = false);
/*!
* Creates polygon, with additional nodes in quadratic mesh
*/
@ -322,7 +367,7 @@ public:
const int id = 0,
const bool force3d = true);
/*!
* Creates quadratic or linear hexahedron
* Creates bi-quadratic, quadratic or linear hexahedron
*/
SMDS_MeshVolume* AddVolume(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
@ -525,6 +570,21 @@ public:
const SMDS_MeshNode* GetMediumNode(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const bool force3d);
/*!
* \brief Return existing or create a new central node for a quardilateral
* quadratic face given its 8 nodes.
* \param force3d - true means node creation in between the given nodes,
* else node position is found on a geometrical face if any.
*/
const SMDS_MeshNode* GetCentralNode(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,
bool force3d);
/*!
* \brief Return index and type of the shape (EDGE or FACE only) to set a medium node on
*/
@ -562,13 +622,13 @@ public:
virtual ~SMESH_MesherHelper();
protected:
protected:
/*!
* \brief Select UV on either of 2 pcurves of a seam edge, closest to the given UV
* \param uv1 - UV on the seam
* \param uv2 - UV within a face
* \retval gp_Pnt2d - selected UV
* \param uv1 - UV on the seam
* \param uv2 - UV within a face
* \retval gp_Pnt2d - selected UV
*/
gp_Pnt2d GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const;
@ -578,10 +638,31 @@ protected:
private:
// Forbiden copy constructor
SMESH_MesherHelper (const SMESH_MesherHelper& theOther) {};
SMESH_MesherHelper (const SMESH_MesherHelper& theOther);
// special map for using during creation of quadratic elements
TLinkNodeMap myTLinkNodeMap;
// key of a map of bi-quadratic face to it's central node
struct TBiQuad: public std::pair<int, std::pair<int, int> >
{
TBiQuad(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n3,
const SMDS_MeshNode* n4)
{
TIDSortedNodeSet s;
s.insert(n1);
s.insert(n2);
s.insert(n3);
s.insert(n4);
TIDSortedNodeSet::iterator n = s.begin();
first = (*n++)->GetID();
second.first = (*n++)->GetID();
second.second = (*n++)->GetID();
}
};
// maps used during creation of quadratic elements
TLinkNodeMap myTLinkNodeMap; // medium nodes on links
std::map< TBiQuad, SMDS_MeshNode* > myMapWithCentralNode; // central nodes of faces
std::set< int > myDegenShapeIds;
std::set< int > mySeamShapeIds;
@ -598,14 +679,35 @@ protected:
int myShapeID;
bool myCreateQuadratic;
bool myCreateBiQuadratic;
bool mySetElemOnShape;
bool myFixNodeParameters;
std::map< int,bool > myNodePosShapesValidity;
bool toCheckPosOnShape(int shapeID ) const;
void setPosOnShapeValidity(int shapeID, bool ok ) const;
};
//=======================================================================
inline gp_XY
SMESH_MesherHelper::calcTFI(double x, double y,
const gp_XY a0,const gp_XY a1,const gp_XY a2,const gp_XY a3,
const gp_XY p0,const gp_XY p1,const gp_XY p2,const gp_XY p3)
{
return
((1 - y) * p0 + x * p1 + y * p2 + (1 - x) * p3 ) -
((1 - x) * (1 - y) * a0 + x * (1 - y) * a1 + x * y * a2 + (1 - x) * y * a3);
}
//=======================================================================
inline gp_XYZ
SMESH_MesherHelper::calcTFI(double x, double y,
const gp_XYZ a0,const gp_XYZ a1,const gp_XYZ a2,const gp_XYZ a3,
const gp_XYZ p0,const gp_XYZ p1,const gp_XYZ p2,const gp_XYZ p3)
{
return
((1 - y) * p0 + x * p1 + y * p2 + (1 - x) * p3 ) -
((1 - x) * (1 - y) * a0 + x * (1 - y) * a1 + x * y * a2 + (1 - x) * y * a3);
}
//=======================================================================
#endif