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https://git.salome-platform.org/gitpub/modules/smesh.git
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0021144: [CEA 441] Problem with projection
+ bool projectBy2DSimilarity()
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eap
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@ -30,18 +30,20 @@
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#include "StdMeshers_ProjectionSource2D.hxx"
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#include "StdMeshers_ProjectionUtils.hxx"
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#include "StdMeshers_FaceSide.hxx"
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#include "SMDS_EdgePosition.hxx"
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#include "SMDS_FacePosition.hxx"
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#include "SMESHDS_Hypothesis.hxx"
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#include "SMESHDS_SubMesh.hxx"
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#include "SMESH_Block.hxx"
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#include "SMESH_Comment.hxx"
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#include "SMESH_Gen.hxx"
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#include "SMESH_Mesh.hxx"
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#include "SMESH_MesherHelper.hxx"
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#include "SMESH_Pattern.hxx"
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#include "SMESH_subMesh.hxx"
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#include "SMESH_subMeshEventListener.hxx"
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#include "SMESH_Comment.hxx"
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#include "SMDS_EdgePosition.hxx"
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#include "utilities.h"
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@ -360,11 +362,6 @@ namespace {
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/*!
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* \brief Preform projection in case if tgtFace.IsPartner( srcFace ) and in case
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* if projection by transformation is possible
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* \param tgtFace - target face
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* \param srcFace - source face
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* \param tgtMesh - target mesh
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* \param srcMesh - source mesh
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* \retval bool - true if succeeded
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*/
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//================================================================================
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@ -529,47 +526,188 @@ namespace {
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helper.IsQuadraticSubMesh( tgtFace );
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helper.SetElementsOnShape( true );
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SMESH_MesherHelper srcHelper( *srcMesh );
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srcHelper.SetSubShape( srcFace );
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const SMDS_MeshNode* nullNode = 0;
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SMESHDS_SubMesh* srcSubDS = srcMesh->GetMeshDS()->MeshElements( srcFace );
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SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
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vector< const SMDS_MeshNode* > tgtNodes;
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while ( elemIt->more() ) // loop on all mesh faces on srcFace
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{
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const SMDS_MeshElement* elem = elemIt->next();
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vector< const SMDS_MeshNode* > tgtFaceNodes;
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tgtFaceNodes.reserve( elem->NbNodes() );
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SMDS_ElemIteratorPtr nodeIt = elem->nodesIterator();
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while ( nodeIt->more() ) // loop on nodes of the source element
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const int nbN = elem->NbCornerNodes();
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tgtNodes.resize( nbN );
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for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
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{
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const SMDS_MeshNode* srcNode = (const SMDS_MeshNode*) nodeIt->next();
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if (elem->IsMediumNode(srcNode))
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continue;
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const SMDS_MeshNode* srcNode = elem->GetNode(i);
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srcN_tgtN = src2tgtNodes.insert( make_pair( srcNode, nullNode )).first;
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if ( srcN_tgtN->second == nullNode )
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{
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// create a new node
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gp_Pnt tgtP = gp_Pnt(srcNode->X(),srcNode->Y(),srcNode->Z()).Transformed( trsf );
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srcN_tgtN->second = helper.AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
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//MESSAGE(tgtP.X() << " " << tgtP.Y() << " " << tgtP.Z());
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SMDS_MeshNode* n = helper.AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
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srcN_tgtN->second = n;
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gp_Pnt2d srcUV = srcHelper.GetNodeUV( srcFace, srcNode,
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elem->GetNode( helper.WrapIndex(i+1,nbN)));
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n->SetPosition( new SMDS_FacePosition( srcUV.X(), srcUV.Y() ));
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}
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tgtFaceNodes.push_back( srcN_tgtN->second );
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tgtNodes[i] = srcN_tgtN->second;
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}
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// create a new face (with reversed orientation)
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//MESSAGE("tgtFaceNodes.size() " << tgtFaceNodes.size());
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switch (tgtFaceNodes.size())
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{
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case 3:
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case 6:
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helper.AddFace(tgtFaceNodes[0], tgtFaceNodes[2], tgtFaceNodes[1]);
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break;
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case 4:
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case 8:
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helper.AddFace(tgtFaceNodes[0], tgtFaceNodes[3], tgtFaceNodes[2], tgtFaceNodes[1]);
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break;
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}
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switch ( nbN )
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{
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case 3: helper.AddFace(tgtNodes[0], tgtNodes[2], tgtNodes[1]); break;
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case 4: helper.AddFace(tgtNodes[0], tgtNodes[3], tgtNodes[2], tgtNodes[1]); break;
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}
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}
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return true;
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}
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} // bool projectPartner()
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//================================================================================
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/*!
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* \brief Preform projection in case if the faces are similar in 2D space
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*/
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//================================================================================
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bool projectBy2DSimilarity(const TopoDS_Face& tgtFace,
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const TopoDS_Face& srcFace,
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SMESH_Mesh * tgtMesh,
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SMESH_Mesh * srcMesh,
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const TAssocTool::TShapeShapeMap& shape2ShapeMap)
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{
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// 1) Preparation
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// get ordered src EDGEs
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TError err;
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TSideVector srcWires =
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StdMeshers_FaceSide::GetFaceWires( srcFace, *srcMesh,/*theIgnoreMediumNodes = */false, err);
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if ( err && !err->IsOK() )
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return false;
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// make corresponding sequence of tgt EDGEs
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TSideVector tgtWires( srcWires.size() );
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for ( unsigned iW = 0; iW < srcWires.size(); ++iW )
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{
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list< TopoDS_Edge > tgtEdges;
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StdMeshers_FaceSidePtr srcWire = srcWires[iW];
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for ( int iE = 0; iE < srcWire->NbEdges(); ++iE )
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tgtEdges.push_back( TopoDS::Edge( shape2ShapeMap( srcWire->Edge( iE ))));
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tgtWires[ iW ].reset( new StdMeshers_FaceSide( tgtFace, tgtEdges, tgtMesh,
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/*theIsForward = */ true,
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/*theIgnoreMediumNodes = */false));
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if ( srcWires[iW]->GetUVPtStruct().size() !=
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tgtWires[iW]->GetUVPtStruct().size())
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return false;
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}
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// 2) Find transformation
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gp_Trsf2d trsf;
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{
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// get ordered nodes data
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const vector<UVPtStruct>& srcUVs = srcWires[0]->GetUVPtStruct();
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const vector<UVPtStruct>& tgtUVs = tgtWires[0]->GetUVPtStruct();
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// get 2 pairs of corresponding UVs
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gp_XY srcP0( srcUVs[0].u, srcUVs[0].v );
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gp_XY srcP1( srcUVs[1].u, srcUVs[1].v );
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gp_XY tgtP0( tgtUVs[0].u, tgtUVs[0].v );
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gp_XY tgtP1( tgtUVs[1].u, tgtUVs[1].v );
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// make transformation
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gp_Trsf2d fromTgtCS, toSrcCS; // from/to global CS
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gp_Ax2d srcCS( srcP0, gp_Vec2d( srcP0, srcP1 ));
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gp_Ax2d tgtCS( tgtP0, gp_Vec2d( tgtP0, tgtP1 ));
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toSrcCS .SetTransformation( srcCS );
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fromTgtCS.SetTransformation( tgtCS );
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fromTgtCS.Invert();
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trsf = fromTgtCS * toSrcCS;
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// check transformation
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const double tol = 1e-5 * gp_Vec2d( srcP0, srcP1 ).Magnitude();
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const int nbCheckPnt = Min( 10, srcUVs.size()-2 );
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const int dP = ( srcUVs.size()-2 ) / nbCheckPnt;
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for ( unsigned iP = 2; iP < srcUVs.size(); iP += dP )
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{
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gp_Pnt2d srcUV( srcUVs[iP].u, srcUVs[iP].v );
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gp_Pnt2d tgtUV( tgtUVs[iP].u, tgtUVs[iP].v );
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gp_Pnt2d tgtUV2 = srcUV.Transformed( trsf );
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if ( tgtUV.Distance( tgtUV2 ) > tol )
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return false;
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}
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}
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// 3) Projection
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typedef map<const SMDS_MeshNode* , const SMDS_MeshNode*, TIDCompare> TN2NMap;
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TN2NMap src2tgtNodes;
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TN2NMap::iterator srcN_tgtN;
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// fill src2tgtNodes in with nodes on EDGEs
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for ( unsigned iW = 0; iW < srcWires.size(); ++iW )
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{
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const vector<UVPtStruct>& srcUVs = srcWires[iW]->GetUVPtStruct();
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const vector<UVPtStruct>& tgtUVs = tgtWires[iW]->GetUVPtStruct();
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for ( unsigned i = 0; i < srcUVs.size(); ++i )
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src2tgtNodes.insert( make_pair( srcUVs[i].node, tgtUVs[i].node ));
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}
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// make elements
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SMESH_MesherHelper helper( *tgtMesh );
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helper.SetSubShape( tgtFace );
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helper.IsQuadraticSubMesh( tgtFace );
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helper.SetElementsOnShape( true );
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Handle(Geom_Surface) tgtSurface = BRep_Tool::Surface( tgtFace );
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SMESH_MesherHelper srcHelper( *srcMesh );
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srcHelper.SetSubShape( srcFace );
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const SMDS_MeshNode* nullNode = 0;
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SMESHDS_SubMesh* srcSubDS = srcMesh->GetMeshDS()->MeshElements( srcFace );
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SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
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vector< const SMDS_MeshNode* > tgtNodes;
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bool uvOK;
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while ( elemIt->more() ) // loop on all mesh faces on srcFace
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{
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const SMDS_MeshElement* elem = elemIt->next();
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const int nbN = elem->NbCornerNodes();
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tgtNodes.resize( nbN );
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for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
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{
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const SMDS_MeshNode* srcNode = elem->GetNode(i);
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srcN_tgtN = src2tgtNodes.insert( make_pair( srcNode, nullNode )).first;
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if ( srcN_tgtN->second == nullNode )
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{
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// create a new node
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gp_Pnt2d srcUV = srcHelper.GetNodeUV( srcFace, srcNode,
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elem->GetNode( helper.WrapIndex(i+1,nbN)), &uvOK);
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gp_Pnt2d tgtUV = srcUV.Transformed( trsf );
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gp_Pnt tgtP = tgtSurface->Value( tgtUV.X(), tgtUV.Y() );
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SMDS_MeshNode* n = helper.AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
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n->SetPosition( new SMDS_FacePosition( tgtUV.X(), tgtUV.Y() ));
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srcN_tgtN->second = n;
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}
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tgtNodes[i] = srcN_tgtN->second;
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}
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// create a new face (with reversed orientation)
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switch ( nbN )
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{
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case 3: helper.AddFace(tgtNodes[0], tgtNodes[2], tgtNodes[1]); break;
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case 4: helper.AddFace(tgtNodes[0], tgtNodes[3], tgtNodes[2], tgtNodes[1]); break;
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}
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}
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return true;
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} // bool projectBy2DSimilarity()
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} // namespace
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@ -628,6 +766,9 @@ bool StdMeshers_Projection_2D::Compute(SMESH_Mesh& theMesh, const TopoDS_Shape&
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if ( projectPartner( tgtFace, srcFace, tgtMesh, srcMesh, shape2ShapeMap ))
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return true;
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if ( projectBy2DSimilarity( tgtFace, srcFace, tgtMesh, srcMesh, shape2ShapeMap ))
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return true;
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// --------------------
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// Prepare to mapping
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// --------------------
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