#include <Geom2d_Line.hxx>
#include <GeomLib_IsPlanarSurface.hxx>
#include <Geom_Curve.hxx>
+#include <TColStd_DataMapOfIntegerInteger.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
// Projections on the top and bottom faces are taken from nodes existing
// on these faces; find correspondence between bottom and top nodes
- myUseBlock = false;
+ myUseBlock = false; // is set to true if projection is done using "block approach"
myBotToColumnMap.clear();
if ( !assocOrProjBottom2Top( bottomToTopTrsf, thePrism ) ) // it also fills myBotToColumnMap
return false;
// Create nodes inside the block
- // use transformation (issue 0020680, IPAL0052499)
- StdMeshers_Sweeper sweeper;
- double tol;
- bool allowHighBndError;
-
if ( !myUseBlock )
{
+ // use transformation (issue 0020680, IPAL0052499) or a "straight line" approach
+ StdMeshers_Sweeper sweeper;
+
// load boundary nodes into sweeper
bool dummy;
+ const SMDS_MeshNode* prevN0 = 0, *prevN1 = 0;
list< TopoDS_Edge >::const_iterator edge = thePrism.myBottomEdges.begin();
for ( ; edge != thePrism.myBottomEdges.end(); ++edge )
{
int edgeID = meshDS->ShapeToIndex( *edge );
TParam2ColumnMap* u2col = const_cast<TParam2ColumnMap*>
( myBlock.GetParam2ColumnMap( edgeID, dummy ));
- TParam2ColumnMap::iterator u2colIt = u2col->begin();
- for ( ; u2colIt != u2col->end(); ++u2colIt )
+
+ TParam2ColumnMap::iterator u2colIt = u2col->begin(), u2colEnd = u2col->end();
+ const SMDS_MeshNode* n0 = u2colIt->second[0];
+ const SMDS_MeshNode* n1 = u2col->rbegin()->second[0];
+ if ( n0 == prevN0 || n0 == prevN1 ) ++u2colIt;
+ if ( n1 == prevN0 || n1 == prevN1 ) --u2colEnd;
+ prevN0 = n0; prevN1 = n1;
+
+ for ( ; u2colIt != u2colEnd; ++u2colIt )
sweeper.myBndColumns.push_back( & u2colIt->second );
}
- // load node columns inside the bottom face
+ // load node columns inside the bottom FACE
TNode2ColumnMap::iterator bot_column = myBotToColumnMap.begin();
+ sweeper.myIntColumns.reserve( myBotToColumnMap.size() );
for ( ; bot_column != myBotToColumnMap.end(); ++bot_column )
sweeper.myIntColumns.push_back( & bot_column->second );
- tol = getSweepTolerance( thePrism );
- allowHighBndError = !isSimpleBottom( thePrism );
- }
+ myHelper->SetElementsOnShape( true );
- if ( !myUseBlock && sweeper.ComputeNodes( *myHelper, tol, allowHighBndError ))
- {
+ // If all "vertical" EDGEs are straight, then all nodes of an internal node column
+ // are located on a line connecting the top node and the bottom node.
+ bool isStrightColunm = allVerticalEdgesStraight( thePrism );
+ if ( !isStrightColunm )
+ {
+ double tol = getSweepTolerance( thePrism );
+ bool allowHighBndError = !isSimpleBottom( thePrism );
+ myUseBlock = !sweeper.ComputeNodes( *myHelper, tol, allowHighBndError );
+ }
+ else if ( sweeper.CheckSameZ() )
+ {
+ myUseBlock = !sweeper.ComputeNodesOnStraightSameZ( *myHelper );
+ }
+ else
+ {
+ myUseBlock = !sweeper.ComputeNodesOnStraight( *myHelper, thePrism.myBottom, thePrism.myTop );
+ }
+ myHelper->SetElementsOnShape( false );
}
- else // use block approach
+
+ if ( myUseBlock ) // use block approach
{
// loop on nodes inside the bottom face
Prism_3D::TNode prevBNode;
bool StdMeshers_Prism_3D::isSimpleBottom( const Prism_3D::TPrismTopo& thePrism )
{
- if ( thePrism.myBottomEdges.size() != 4 )
+ if ( thePrism.myNbEdgesInWires.front() != 4 )
return false;
// analyse angles between edges
return true;
}
+//=======================================================================
+//function : allVerticalEdgesStraight
+//purpose : Defines if all "vertical" EDGEs are straight
+//=======================================================================
+
+bool StdMeshers_Prism_3D::allVerticalEdgesStraight( const Prism_3D::TPrismTopo& thePrism )
+{
+ for ( size_t i = 0; i < thePrism.myWallQuads.size(); ++i )
+ {
+ const Prism_3D::TQuadList& quads = thePrism.myWallQuads[i];
+ Prism_3D::TQuadList::const_iterator quadIt = quads.begin();
+ TopoDS_Edge prevQuadEdge;
+ for ( ; quadIt != quads.end(); ++quadIt )
+ {
+ StdMeshers_FaceSidePtr rightSide = (*quadIt)->side[ QUAD_RIGHT_SIDE ];
+
+ if ( !prevQuadEdge.IsNull() &&
+ !SMESH_Algo::IsContinuous( rightSide->Edge( 0 ), prevQuadEdge ))
+ return false;
+
+ for ( int iE = 0; iE < rightSide->NbEdges(); ++iE )
+ {
+ const TopoDS_Edge & rightE = rightSide->Edge( iE );
+ if ( !SMESH_Algo::IsStraight( rightE, /*degenResult=*/true ))
+ return false;
+
+ if ( iE > 0 &&
+ !SMESH_Algo::IsContinuous( rightSide->Edge( iE-1 ), rightE ))
+ return false;
+
+ prevQuadEdge = rightE;
+ }
+ }
+ }
+ return true;
+}
+
//=======================================================================
//function : project2dMesh
//purpose : Project mesh faces from a source FACE of one prism (theSrcFace)
//================================================================================
/*!
- * \brief Creates internal nodes of the prism
+ * \brief Create internal nodes of the prism
*/
//================================================================================
return true;
}
+
+//================================================================================
+/*!
+ * \brief Check if all nodes of each layers have same logical Z
+ */
+//================================================================================
+
+bool StdMeshers_Sweeper::CheckSameZ()
+{
+ myZColumns.resize( myBndColumns.size() );
+ fillZColumn( myZColumns[0], *myBndColumns[0] );
+
+ bool sameZ = true;
+ const double tol = 0.1 * 1./ myBndColumns[0]->size();
+
+ // check columns based on VERTEXes
+
+ vector< int > vertexIndex;
+ vertexIndex.push_back( 0 );
+ for ( size_t iC = 1; iC < myBndColumns.size() && sameZ; ++iC )
+ {
+ if ( myBndColumns[iC]->front()->GetPosition()->GetDim() > 0 )
+ continue; // not on VERTEX
+
+ vertexIndex.push_back( iC );
+ fillZColumn( myZColumns[iC], *myBndColumns[iC] );
+
+ for ( size_t iZ = 0; iZ < myZColumns[0].size() && sameZ; ++iZ )
+ sameZ = ( Abs( myZColumns[0][iZ] - myZColumns[iC][iZ]) < tol );
+ }
+
+ // check columns based on EDGEs, one per EDGE
+
+ for ( size_t i = 1; i < vertexIndex.size() && sameZ; ++i )
+ {
+ if ( vertexIndex[i] - vertexIndex[i-1] < 2 )
+ continue;
+
+ int iC = ( vertexIndex[i] + vertexIndex[i-1] ) / 2;
+ fillZColumn( myZColumns[iC], *myBndColumns[iC] );
+
+ for ( size_t iZ = 0; iZ < myZColumns[0].size() && sameZ; ++iZ )
+ sameZ = ( Abs( myZColumns[0][iZ] - myZColumns[iC][iZ]) < tol );
+ }
+
+ if ( sameZ )
+ {
+ myZColumns.resize(1);
+ }
+ else
+ {
+ for ( size_t iC = 1; iC < myBndColumns.size(); ++iC )
+ fillZColumn( myZColumns[iC], *myBndColumns[iC] );
+ }
+
+ return sameZ;
+}
+
+//================================================================================
+/*!
+ * \brief Create internal nodes of the prism all located on straight lines with
+ * the same distribution along the lines.
+ */
+//================================================================================
+
+bool StdMeshers_Sweeper::ComputeNodesOnStraightSameZ( SMESH_MesherHelper& helper )
+{
+ TZColumn& z = myZColumns[0];
+
+ for ( size_t i = 0; i < myIntColumns.size(); ++i )
+ {
+ TNodeColumn& nodes = *myIntColumns[i];
+ SMESH_NodeXYZ n0( nodes[0] ), n1( nodes.back() );
+
+ for ( size_t iZ = 0; iZ < z.size(); ++iZ )
+ {
+ gp_XYZ p = n0 * ( 1 - z[iZ] ) + n1 * z[iZ];
+ nodes[ iZ+1 ] = helper.AddNode( p.X(), p.Y(), p.Z() );
+ }
+ }
+
+ return true;
+}
+
+//================================================================================
+/*!
+ * \brief Create internal nodes of the prism all located on straight lines with
+ * different distributions along the lines.
+ */
+//================================================================================
+
+bool StdMeshers_Sweeper::ComputeNodesOnStraight( SMESH_MesherHelper& helper,
+ const TopoDS_Face& botFace,
+ const TopoDS_Face& topFace )
+{
+ // get data to create a Morph
+ UVPtStructVec botUV( myBndColumns.size() + 1 );
+ UVPtStructVec topUV( myBndColumns.size() + 1 );
+ for ( size_t i = 0; i < myBndColumns.size(); ++i )
+ {
+ TNodeColumn& nodes = *myBndColumns[i];
+ botUV[i].node = nodes[0];
+ botUV[i].SetUV( helper.GetNodeUV( botFace, nodes[0] ));
+ topUV[i].node = nodes.back();
+ topUV[i].SetUV( helper.GetNodeUV( topFace, nodes.back() ));
+ botUV[i].node->setIsMarked( true );
+ }
+ botUV.back() = botUV[0];
+ topUV.back() = topUV[0];
+
+ TopoDS_Edge dummyE;
+ TSideVector botWires( 1, StdMeshers_FaceSide::New( botUV, botFace, dummyE, helper.GetMesh() ));
+ TSideVector topWires( 1, StdMeshers_FaceSide::New( topUV, topFace, dummyE, helper.GetMesh() ));
+
+ // use Morph to make delauney mesh on the FACEs. Locating of a node within a
+ // delauney triangle will be used to get a weighted Z.
+ NSProjUtils::Morph botDelauney( botWires );
+ NSProjUtils::Morph topDelauney( topWires );
+
+ if ( helper.GetIsQuadratic() )
+ {
+ // mark all medium nodes of faces on botFace to avoid their treating
+ SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( botFace );
+ SMDS_ElemIteratorPtr eIt = smDS->GetElements();
+ while ( eIt->more() )
+ {
+ const SMDS_MeshElement* e = eIt->next();
+ for ( int i = e->NbCornerNodes(), nb = e->NbNodes(); i < nb; ++i )
+ e->GetNode( i )->setIsMarked( true );
+ }
+ }
+
+ // map to get a node column by a bottom node
+ TColStd_DataMapOfIntegerInteger iNode2iCol( myIntColumns.size() );
+
+ // un-mark nodes to treat (internal bottom nodes); later we will mark treated nodes
+ for ( size_t i = 0; i < myIntColumns.size(); ++i )
+ {
+ const SMDS_MeshNode* botNode = myIntColumns[i]->front();
+ botNode->setIsMarked( false );
+ iNode2iCol.Bind( botNode->GetID(), i );
+ }
+
+ const int botFaceID = helper.GetMesh()->GetSubMesh( botFace )->GetId();
+ const SMDS_MeshNode *botNode, *topNode;
+ const BRepMesh_Triangle *botTria, *topTria;
+ double botBC[3], topBC[3]; // barycentric coordinates
+ int botTriaNodes[3], topTriaNodes[3];
+ bool checkUV = true;
+
+ // a queue of bottom nodes with starting delauney triangles
+ NSProjUtils::Morph::TNodeTriaList botNoTriQueue;
+
+ size_t iBndN = 1; // index of a bottom boundary node
+ int nbNodesToProcess = myIntColumns.size();
+ while ( nbNodesToProcess > 0 )
+ {
+ while ( !botNoTriQueue.empty() ) // treat all nodes in the queue
+ {
+ botNode = botNoTriQueue.front().first;
+ botTria = botNoTriQueue.front().second;
+ botNoTriQueue.pop_front();
+ if ( botNode->isMarked() )
+ continue;
+ --nbNodesToProcess;
+ botNode->setIsMarked( true );
+
+ TNodeColumn* column = myIntColumns[ iNode2iCol( botNode->GetID() )];
+
+ // find a delauney triangle containing the botNode
+ gp_XY botUV = helper.GetNodeUV( botFace, botNode, NULL, &checkUV );
+ botUV *= botDelauney.GetScale();
+ botTria = botDelauney.FindTriangle( botUV, botTria, botBC, botTriaNodes );
+ if ( !botTria )
+ return false;
+
+ // find a delauney triangle containing the topNode
+ topNode = column->back();
+ gp_XY topUV = helper.GetNodeUV( topFace, topNode, NULL, &checkUV );
+ topUV *= topDelauney.GetScale();
+ // get a starting triangle basing on that top and bot boundary nodes have same index
+ topTria = topDelauney.GetTriangleNear( botTriaNodes[0] );
+ topTria = topDelauney.FindTriangle( topUV, topTria, topBC, topTriaNodes );
+ if ( !topTria )
+ return false;
+
+ // create nodes along a line
+ SMESH_NodeXYZ botP( botNode ), topP( topNode);
+ for ( size_t iZ = 0; iZ < myZColumns[0].size(); ++iZ )
+ {
+ // use barycentric coordinates as weight of Z of boundary columns
+ double botZ = 0, topZ = 0;
+ for ( int i = 0; i < 3; ++i )
+ {
+ botZ += botBC[i] * myZColumns[ botTriaNodes[i]-1 ][ iZ ];
+ topZ += topBC[i] * myZColumns[ topTriaNodes[i]-1 ][ iZ ];
+ }
+ double rZ = double( iZ + 1 ) / ( myZColumns[0].size() + 1 );
+ double z = botZ * ( 1 - rZ ) + topZ * rZ;
+ gp_XYZ p = botP * ( 1 - z ) + topP * z;
+ (*column)[ iZ+1 ] = helper.AddNode( p.X(), p.Y(), p.Z() );
+ }
+
+ // add neighbor nodes to the queue
+ botDelauney.AddCloseNodes( botNode, botTria, botFaceID, botNoTriQueue );
+ }
+
+ if ( nbNodesToProcess > 0 ) // fill the queue
+ {
+ // assure that all bot nodes are visited
+ for ( ; iBndN-1 < myBndColumns.size() && botNoTriQueue.empty(); ++iBndN )
+ {
+ botTria = botDelauney.GetTriangleNear( iBndN );
+ const SMDS_MeshNode* bndNode = botDelauney.GetBndNodes()[ iBndN ];
+ botDelauney.AddCloseNodes( bndNode, botTria, botFaceID, botNoTriQueue );
+ }
+ if ( botNoTriQueue.empty() )
+ {
+ for ( size_t i = 0; i < myIntColumns.size(); ++i )
+ {
+ botNode = myIntColumns[i]->front();
+ if ( !botNode->isMarked() )
+ botNoTriQueue.push_back( make_pair( botNode, botTria ));
+ }
+ }
+ }
+ }
+
+ return true;
+}
+
+//================================================================================
+/*!
+ * \brief Compute Z of nodes of a straight column
+ */
+//================================================================================
+
+void StdMeshers_Sweeper::fillZColumn( TZColumn& zColumn,
+ TNodeColumn& nodes )
+{
+ if ( zColumn.size() == nodes.size() - 2 )
+ return;
+
+ gp_Pnt p0 = SMESH_NodeXYZ( nodes[0] );
+ gp_Vec line( p0, SMESH_NodeXYZ( nodes.back() ));
+ double len2 = line.SquareMagnitude();
+
+ zColumn.resize( nodes.size() - 2 );
+ for ( size_t i = 0; i < zColumn.size(); ++i )
+ {
+ gp_Vec vec( p0, SMESH_NodeXYZ( nodes[ i+1] ));
+ zColumn[i] = ( line * vec ) / len2; // param [0,1] on the line
+ }
+}
