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0020982: EDF 1547 SMESH: Creation of non-conformal quadratic pyramids / note 0011144

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+  //================================================================================
+  /*!
+   * \brief Move medium nodes of merged quadratic pyramids
+   */
+  //================================================================================
+
+  void UpdateQuadraticPyramids(const set<const SMDS_MeshNode*>& commonApex,
+                               SMESHDS_Mesh*                    meshDS)
This commit is contained in:
eap 2011-05-19 14:22:43 +00:00
parent 05cabdfb7d
commit b8dabcd4f4
1 changed files with 77 additions and 0 deletions
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77
src/StdMeshers/StdMeshers_QuadToTriaAdaptor.cxx
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@ -175,6 +175,79 @@ namespace
return tooClose;
}
//================================================================================
/*!
* \brief Move medium nodes of merged quadratic pyramids
*/
//================================================================================
void UpdateQuadraticPyramids(const set<const SMDS_MeshNode*>& commonApex,
SMESHDS_Mesh* meshDS)
{
typedef SMDS_StdIterator< const SMDS_MeshElement*, SMDS_ElemIteratorPtr > TStdElemIterator;
TStdElemIterator itEnd;
// shift of node index to get medium nodes corresponding to the 4 base nodes
const int base2MediumShift = 9;
set<const SMDS_MeshNode*>::const_iterator nIt = commonApex.begin();
for ( ; nIt != commonApex.end(); ++nIt )
{
SMESH_TNodeXYZ apex( *nIt );
vector< const SMDS_MeshElement* > pyrams // pyramids sharing the apex node
( TStdElemIterator( apex._node->GetInverseElementIterator( SMDSAbs_Volume )), itEnd );
// Select medium nodes to keep and medium nodes to remove
typedef map < const SMDS_MeshNode*, const SMDS_MeshNode*, TIDCompare > TN2NMap;
TN2NMap base2medium; // to keep
vector< const SMDS_MeshNode* > nodesToRemove;
for ( unsigned i = 0; i < pyrams.size(); ++i )
for ( int baseIndex = 0; baseIndex < PYRAM_APEX; ++baseIndex )
{
SMESH_TNodeXYZ base = pyrams[i]->GetNode( baseIndex );
const SMDS_MeshNode* medium = pyrams[i]->GetNode( baseIndex + base2MediumShift );
TN2NMap::iterator b2m = base2medium.insert( make_pair( base._node, medium )).first;
if ( b2m->second != medium )
{
nodesToRemove.push_back( medium );
}
else
{
// move the kept medium node
gp_XYZ newXYZ = 0.5 * ( apex + base );
meshDS->MoveNode( medium, newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
}
}
// Within pyramids, replace nodes to remove by nodes to keep
for ( unsigned i = 0; i < pyrams.size(); ++i )
{
vector< const SMDS_MeshNode* > nodes( pyrams[i]->begin_nodes(),
pyrams[i]->end_nodes() );
for ( int baseIndex = 0; baseIndex < PYRAM_APEX; ++baseIndex )
{
const SMDS_MeshNode* base = pyrams[i]->GetNode( baseIndex );
nodes[ baseIndex + base2MediumShift ] = base2medium[ base ];
}
meshDS->ChangeElementNodes( pyrams[i], &nodes[0], nodes.size());
}
// Remove the replaced nodes
if ( !nodesToRemove.empty() )
{
SMESHDS_SubMesh * sm = meshDS->MeshElements( nodesToRemove[0]->getshapeId() );
for ( unsigned i = 0; i < nodesToRemove.size(); ++i )
meshDS->RemoveFreeNode( nodesToRemove[i], sm, /*fromGroups=*/false);
}
}
}
}
//================================================================================
@ -1173,6 +1246,10 @@ bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh&
meshDS->MoveNode( *n, (*n)->X(), (*n)->Y(), (*n)->Z() );
}
// move medium nodes of merged quadratic pyramids
if ( myPyramids[0]->IsQuadratic() )
UpdateQuadraticPyramids( nodesToMove, GetMeshDS() );
// erase removed triangles from the proxy mesh
if ( !myRemovedTrias.empty() )
{