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21397: EDF SMESH: a quadrangle face mesh can't be projected to a cylinder

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fix pattern orientation when projecting to a FACE with seam EDGE
This commit is contained in:
eap 2013-01-10 11:33:12 +00:00
parent 6f564a0788
commit b48879bb7b
1 changed files with 39 additions and 24 deletions
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57
src/StdMeshers/StdMeshers_Projection_2D.cxx
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@ -888,38 +888,47 @@ bool StdMeshers_Projection_2D::Compute(SMESH_Mesh& theMesh, const TopoDS_Shape&
const bool toProjectNodes = const bool toProjectNodes =
( nbFaceNodes > 0 && ( uvBox.IsVoid() || uvBox.SquareExtent() < DBL_MIN )); ( nbFaceNodes > 0 && ( uvBox.IsVoid() || uvBox.SquareExtent() < DBL_MIN ));
// Load pattern from the source face // Find the corresponding source and target vertex
SMESH_Pattern mapper;
mapper.Load( srcMesh, srcFace, toProjectNodes );
if ( mapper.GetErrorCode() != SMESH_Pattern::ERR_OK )
return error(COMPERR_BAD_INPUT_MESH,"Can't load mesh pattern from the source face");
// Find the first target vertex corresponding to first vertex of the <mapper>
// and <theReverse> flag needed to call mapper.Apply() // and <theReverse> flag needed to call mapper.Apply()
TopoDS_Vertex srcV1 = TopoDS::Vertex( mapper.GetSubShape( 1 )); TopoDS_Vertex srcV1, tgtV1;
if ( srcV1.IsNull() )
RETURN_BAD_RESULT("Mesh is not bound to the face");
if ( !shape2ShapeMap.IsBound( srcV1, /*isSrc=*/true ))
RETURN_BAD_RESULT("Not associated vertices, srcV1 " << srcV1.TShape().operator->() );
TopoDS_Vertex tgtV1 = TopoDS::Vertex( shape2ShapeMap( srcV1, /*isSrc=*/true ));
if ( !SMESH_MesherHelper::IsSubShape( srcV1, srcFace ))
RETURN_BAD_RESULT("Wrong srcV1 " << srcV1.TShape().operator->());
if ( !SMESH_MesherHelper::IsSubShape( tgtV1, tgtFace ))
RETURN_BAD_RESULT("Wrong tgtV1 " << tgtV1.TShape().operator->());
// try to find out orientation by order of edges
bool reverse = false; bool reverse = false;
if ( _sourceHypo->HasVertexAssociation() ) {
srcV1 = _sourceHypo->GetSourceVertex(1);
tgtV1 = _sourceHypo->GetTargetVertex(1);
} else {
srcV1 = TopoDS::Vertex( TopExp_Explorer( srcFace, TopAbs_VERTEX ).Current() );
tgtV1 = TopoDS::Vertex( shape2ShapeMap( srcV1, /*isSrc=*/true ));
}
list< TopoDS_Edge > tgtEdges, srcEdges; list< TopoDS_Edge > tgtEdges, srcEdges;
list< int > nbEdgesInWires; list< int > nbEdgesInWires;
SMESH_Block::GetOrderedEdges( tgtFace, tgtV1, tgtEdges, nbEdgesInWires ); SMESH_Block::GetOrderedEdges( tgtFace, tgtV1, tgtEdges, nbEdgesInWires );
SMESH_Block::GetOrderedEdges( srcFace, srcV1, srcEdges, nbEdgesInWires ); SMESH_Block::GetOrderedEdges( srcFace, srcV1, srcEdges, nbEdgesInWires );
if ( nbEdgesInWires.front() > 1 ) // possible to find out
if ( nbEdgesInWires.front() > 1 ) // possible to find out orientation
{ {
TopoDS_Edge srcE1 = srcEdges.front(), tgtE1 = tgtEdges.front(); TopoDS_Edge srcE1 = srcEdges.front(), tgtE1 = tgtEdges.front();
TopoDS_Shape srcE1bis = shape2ShapeMap( tgtE1 ); TopoDS_Shape srcE1bis = shape2ShapeMap( tgtE1 );
reverse = ( ! srcE1.IsSame( srcE1bis )); reverse = ( ! srcE1.IsSame( srcE1bis ));
if ( reverse &&
_sourceHypo->HasVertexAssociation() &&
nbEdgesInWires.front() > 2 &&
helper.IsRealSeam( tgtEdges.front() ))
{
// projection to a face with seam EDGE; pb is that GetOrderedEdges()
// always puts a seam EDGE first (if possible) and as a result
// we can't use only theReverse flag to correctly associate source
// and target faces in the mapper. Thus we select srcV1 so that
// GetOrderedEdges() to return EDGEs in a needed order
list< TopoDS_Edge >::iterator edge = srcEdges.begin();
for ( ; edge != srcEdges.end(); ++edge ) {
if ( srcE1bis.IsSame( *edge )) {
srcV1 = helper.IthVertex( 0, *edge );
break;
}
}
}
} }
else if ( nbEdgesInWires.front() == 1 ) else if ( nbEdgesInWires.front() == 1 )
{ {
@ -931,6 +940,12 @@ bool StdMeshers_Projection_2D::Compute(SMESH_Mesh& theMesh, const TopoDS_Shape&
RETURN_BAD_RESULT("Bad result from SMESH_Block::GetOrderedEdges()"); RETURN_BAD_RESULT("Bad result from SMESH_Block::GetOrderedEdges()");
} }
// Load pattern from the source face
SMESH_Pattern mapper;
mapper.Load( srcMesh, srcFace, toProjectNodes, srcV1 );
if ( mapper.GetErrorCode() != SMESH_Pattern::ERR_OK )
return error(COMPERR_BAD_INPUT_MESH,"Can't load mesh pattern from the source face");
// -------------------- // --------------------
// Perform 2D mapping // Perform 2D mapping
// -------------------- // --------------------