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IMP23369: [CEA 1513] compute a mesh using an already existing mesh with MG-CADSurf
[modules/smesh.git] / src / SMESH / SMESH_subMesh.cxx
index 64ee5948de5d9b569196bac7497813a26fbc6389..b297cf60945552487f4f9a0c72e7e98ebff68bc3 100644 (file)
 
 #include "SMESH_subMesh.hxx"
 
+#include "SMDS_SetIterator.hxx"
+#include "SMESHDS_Mesh.hxx"
 #include "SMESH_Algo.hxx"
+#include "SMESH_Comment.hxx"
 #include "SMESH_Gen.hxx"
 #include "SMESH_HypoFilter.hxx"
 #include "SMESH_Hypothesis.hxx"
 #include "SMESH_Mesh.hxx"
 #include "SMESH_MesherHelper.hxx"
 #include "SMESH_subMeshEventListener.hxx"
-#include "SMESH_Comment.hxx"
-#include "SMDS_SetIterator.hxx"
-#include "SMDSAbs_ElementType.hxx"
 
 #include <Basics_OCCTVersion.hxx>
 
 
 using namespace std;
 
+#ifdef _DEBUG_
+// enable printing algo + shape id + hypo used while meshing
+//#define PRINT_WHO_COMPUTE_WHAT
+#endif
+
 //=============================================================================
 /*!
  * \brief Allocate some memory at construction and release it at destruction.
@@ -241,7 +246,7 @@ bool SMESH_subMesh::IsMeshComputed() const
 {
   if ( _alwaysComputed )
     return true;
-  // algo may bind a submesh not to _subShape, eg 3D algo
+  // algo may bind a sub-mesh not to _subShape, eg 3D algo
   // sets nodes on SHELL while _subShape may be SOLID
 
   SMESHDS_Mesh* meshDS = _father->GetMeshDS();
@@ -280,7 +285,7 @@ bool SMESH_subMesh::SubMeshesComputed(bool * isFailedToCompute/*=0*/) const
   int dimToCheck = myDim - 1;
   bool subMeshesComputed = true;
   if ( isFailedToCompute ) *isFailedToCompute = false;
-  // check subMeshes with upper dimension => reverse iteration
+  // check sub-meshes with upper dimension => reverse iteration
   SMESH_subMeshIteratorPtr smIt = getDependsOnIterator(false,true);
   while ( smIt->more() )
   {
@@ -291,67 +296,22 @@ bool SMESH_subMesh::SubMeshesComputed(bool * isFailedToCompute/*=0*/) const
 
     // MSV 07.04.2006: restrict checking to myDim-1 only. Ex., there is no sense
     // in checking of existence of edges if the algo needs only faces. Moreover,
-    // degenerated edges may have no submesh, as after computing NETGEN_2D.
+    // degenerated edges may have no sub-mesh, as after computing NETGEN_2D.
     if ( !_algo || _algo->NeedDiscreteBoundary() ) {
       int dim = SMESH_Gen::GetShapeDim( ss );
       if (dim < dimToCheck)
-        break; // the rest subMeshes are all of less dimension
+        break; // the rest sub-meshes are all of less dimension
     }
     SMESHDS_SubMesh * ds = sm->GetSubMeshDS();
-    bool computeOk = (sm->GetComputeState() == COMPUTE_OK ||
-                      (ds && ( dimToCheck ? ds->NbElements() : ds->NbNodes()  )));
+    bool computeOk = ((sm->GetComputeState() == COMPUTE_OK ) ||
+                      (ds && ( dimToCheck ? ds->NbElements() : ds->NbNodes() )));
     if (!computeOk)
     {
       subMeshesComputed = false;
+
       if ( isFailedToCompute && !(*isFailedToCompute) )
         *isFailedToCompute = ( sm->GetComputeState() == FAILED_TO_COMPUTE );
 
-      // int type = ss.ShapeType();
-
-      // switch (type)
-      // {
-      // case TopAbs_COMPOUND:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a COMPOUND");
-      //     break;
-      //   }
-      // case TopAbs_COMPSOLID:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a COMPSOLID");
-      //     break;
-      //   }
-      // case TopAbs_SHELL:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a SHEL");
-      //     break;
-      //   }
-      // case TopAbs_WIRE:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a WIRE");
-      //     break;
-      //   }
-      // case TopAbs_SOLID:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a SOLID");
-      //     break;
-      //   }
-      // case TopAbs_FACE:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a FACE");
-      //     break;
-      //   }
-      // case TopAbs_EDGE:
-      //   {
-      //     MESSAGE("The not computed sub mesh is a EDGE");
-      //     break;
-      //   }
-      // default:
-      //   {
-      //     MESSAGE("The not computed sub mesh is of unknown type");
-      //     break;
-      //   }
-      // }
-
       if ( !isFailedToCompute )
         break;
     }
@@ -555,7 +515,20 @@ bool SMESH_subMesh::CanAddHypothesis(const SMESH_Hypothesis* theHypothesis) cons
 
 //=======================================================================
 //function : IsApplicableHypotesis
-//purpose  :
+//purpose  : check if this sub-mesh can be computed using a hypothesis
+//=======================================================================
+
+bool SMESH_subMesh::IsApplicableHypotesis(const SMESH_Hypothesis* theHypothesis) const
+{
+  if ( !_father->HasShapeToMesh() && _subShape.ShapeType() == TopAbs_SOLID )
+    return true; // true for the PseudoShape
+
+  return IsApplicableHypotesis( theHypothesis, _subShape.ShapeType() );
+}
+
+//=======================================================================
+//function : IsApplicableHypotesis
+//purpose  : compare shape type and hypothesis type
 //=======================================================================
 
 bool SMESH_subMesh::IsApplicableHypotesis(const SMESH_Hypothesis* theHypothesis,
@@ -1254,7 +1227,7 @@ void SMESH_subMesh::cleanDependsOn( SMESH_Algo* algoRequiringCleaning/*=0*/ )
         // remember all sub-meshes of sm
         if ( keepSubMeshes )
         {
-          SMESH_subMeshIteratorPtr smIt2 = getDependsOnIterator(false);
+          SMESH_subMeshIteratorPtr smIt2 = sm->getDependsOnIterator(true);
           while ( smIt2->more() )
             smToKeep.insert( smIt2->next() );
         }
@@ -1317,24 +1290,44 @@ void SMESH_subMesh::DumpAlgoState(bool isMain)
 static void cleanSubMesh( SMESH_subMesh * subMesh )
 {
   if (subMesh) {
-    if (SMESHDS_SubMesh * subMeshDS = subMesh->GetSubMeshDS()) {
+    if (SMESHDS_SubMesh * subMeshDS = subMesh->GetSubMeshDS())
+    {
       SMESHDS_Mesh * meshDS = subMesh->GetFather()->GetMeshDS();
-      SMDS_ElemIteratorPtr ite = subMeshDS->GetElements();
-      while (ite->more()) {
-        const SMDS_MeshElement * elt = ite->next();
-        //MESSAGE( " RM elt: "<<elt->GetID()<<" ( "<<elt->NbNodes()<<" )" );
-        //meshDS->RemoveElement(elt);
-        meshDS->RemoveFreeElement(elt, 0);
+      int nbElems = subMeshDS->NbElements();
+      if ( nbElems > 0 )
+      {
+        // start from elem with max ID to avoid filling the pool of IDs
+        bool rev = true;
+        SMDS_ElemIteratorPtr ite = subMeshDS->GetElements( rev );
+        const SMDS_MeshElement * lastElem = ite->next();
+        rev = ( lastElem->GetID() == meshDS->MaxElementID() );
+        if ( !rev )
+          ite = subMeshDS->GetElements( rev );
+        else
+          meshDS->RemoveFreeElement( lastElem, subMeshDS );
+        while (ite->more()) {
+          const SMDS_MeshElement * elt = ite->next();
+          meshDS->RemoveFreeElement( elt, subMeshDS );
+        }
       }
-
-      SMDS_NodeIteratorPtr itn = subMeshDS->GetNodes();
-      while (itn->more()) {
-        const SMDS_MeshNode * node = itn->next();
-        //MESSAGE( " RM node: "<<node->GetID());
-        if ( node->NbInverseElements() == 0 )
-          meshDS->RemoveFreeNode(node, 0);
-        else // for StdMeshers_CompositeSegment_1D: node in one submesh, edge in another
-          meshDS->RemoveNode(node);
+      int nbNodes = subMeshDS->NbNodes();
+      if ( nbNodes > 0 )
+      {
+        bool rev = true;
+        SMDS_NodeIteratorPtr itn = subMeshDS->GetNodes( rev );
+        const SMDS_MeshNode * lastNode = itn->next();
+        rev = ( lastNode->GetID() == meshDS->MaxNodeID() );
+        if ( !rev )
+          itn = subMeshDS->GetNodes( rev );
+        else
+          meshDS->RemoveNode( lastNode );
+        while (itn->more()) {
+          const SMDS_MeshNode * node = itn->next();
+          if ( node->NbInverseElements() == 0 )
+            meshDS->RemoveFreeNode( node, subMeshDS );
+          else // for StdMeshers_CompositeSegment_1D: node in one submesh, edge in another
+            meshDS->RemoveNode(node);
+        }
       }
       subMeshDS->Clear();
     }
@@ -1461,6 +1454,31 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
           _computeState = READY_TO_COMPUTE;
       }
       break;
+
+    case COMPUTE_NOGEOM:  // no geometry; can be several algos
+      if ( !_father->HasShapeToMesh() )
+      {
+        algo = GetAlgo(); // current algo
+        if ( algo )
+        {
+          // apply algos in the order of increasing dimension
+          std::list< const SMESHDS_Hypothesis * > algos = _father->GetHypothesisList( _subShape );
+          for ( int t = SMESHDS_Hypothesis::ALGO_1D; t <= SMESHDS_Hypothesis::ALGO_3D; ++t )
+          {
+            std::list<const SMESHDS_Hypothesis *>::iterator al = algos.begin();
+            for ( ; al != algos.end(); ++al )
+              if ( (*al)->GetType() == t )
+              {
+                _algo = (SMESH_Algo*) *al;
+                _computeState = READY_TO_COMPUTE;
+                if ( !ComputeStateEngine( COMPUTE ))
+                  break;
+              }
+          }
+          _algo = algo; // restore
+        }
+        break;
+      }
     case COMPUTE:
     case COMPUTE_SUBMESH:
       {
@@ -1544,7 +1562,6 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
           MESSAGE("std::bad_alloc thrown inside algo->Compute()");
           if ( _computeError ) {
             _computeError->myName = COMPERR_MEMORY_PB;
-            //_computeError->myComment = exc.what();
           }
           cleanSubMesh( this );
           throw exc;
@@ -1553,7 +1570,6 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
           MESSAGE("Standard_OutOfMemory thrown inside algo->Compute()");
           if ( _computeError ) {
             _computeError->myName = COMPERR_MEMORY_PB;
-            //_computeError->myComment = exc.what();
           }
           cleanSubMesh( this );
           throw std::bad_alloc();
@@ -1594,7 +1610,7 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
           ret = false;
         // check if anything was built
         TopExp_Explorer subS(shape, _subShape.ShapeType());
-        if (ret)
+        if ( ret )
         {
           for (; ret && subS.More(); subS.Next())
             if ( !_father->GetSubMesh( subS.Current() )->IsMeshComputed() &&
@@ -1602,10 +1618,27 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
                    !algo->isDegenerated( TopoDS::Edge( subS.Current() ))))
               ret = false;
         }
+#ifdef PRINT_WHO_COMPUTE_WHAT
+        for (subS.ReInit(); subS.More(); subS.Next())
+        {
+          const std::list <const SMESHDS_Hypothesis *> & hyps =
+            _algo->GetUsedHypothesis( *_father, _subShape );
+          SMESH_Comment hypStr;
+          if ( !hyps.empty() )
+          {
+            hypStr << hyps.front()->GetName() << " ";
+            ((SMESHDS_Hypothesis*)hyps.front())->SaveTo( hypStr.Stream() );
+            hypStr << " ";
+          }
+          cout << _algo->GetName()
+               << " " << _father->GetSubMesh( subS.Current() )->GetId()
+               << " " << hypStr << endl;
+        }
+#endif
         // Set _computeError
-        if (!ret && !isComputeErrorSet)
+        if ( !ret && !isComputeErrorSet )
         {
-          for (subS.ReInit(); subS.More(); subS.Next())
+          for ( subS.ReInit(); subS.More(); subS.Next() )
           {
             SMESH_subMesh* sm = _father->GetSubMesh( subS.Current() );
             if ( !sm->IsMeshComputed() )
@@ -1619,11 +1652,41 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
             }
           }
         }
-        if (ret && _computeError && _computeError->myName != COMPERR_WARNING )
+        if ( ret && _computeError && _computeError->myName != COMPERR_WARNING )
         {
           _computeError.reset();
         }
 
+        // transform errors into warnings if it is caused by mesh edition (imp 0023068)
+        if (!ret && _father->GetIsModified() )
+        {
+          for (subS.ReInit(); subS.More(); subS.Next())
+          {
+            SMESH_subMesh* sm = _father->GetSubMesh( subS.Current() );
+            if ( !sm->IsMeshComputed() && sm->_computeError )
+            {
+              // check if there is a VERTEX w/o nodes
+              // with READY_TO_COMPUTE state (after MergeNodes())
+              SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(false,false);
+              while ( smIt->more() )
+              {
+                SMESH_subMesh * vertSM = smIt->next();
+                if ( vertSM->_subShape.ShapeType() != TopAbs_VERTEX ) break;
+                if ( vertSM->GetComputeState() == READY_TO_COMPUTE )
+                {
+                  SMESHDS_SubMesh * ds = vertSM->GetSubMeshDS();
+                  if ( !ds || ds->NbNodes() == 0 )
+                  {
+                    sm->_computeState = READY_TO_COMPUTE;
+                    sm->_computeError->myName = COMPERR_WARNING;
+                    break;
+                  }
+                }
+              }
+            }
+          }
+        }
+
         // send event SUBMESH_COMPUTED
         if ( ret ) {
           if ( !algo->NeedDiscreteBoundary() )
@@ -2094,10 +2157,10 @@ TopoDS_Shape SMESH_subMesh::getCollection(SMESH_Gen * theGen,
     const TopoDS_Shape&  S = subMesh->_subShape;
     if ( S.ShapeType() != this->_subShape.ShapeType() )
       continue;
-    theSubs.push_back( subMesh );
     if ( subMesh == this )
     {
       aBuilder.Add( aCompound, S );
+      theSubs.push_back( subMesh );
     }
     else if ( subMesh->GetComputeState() == READY_TO_COMPUTE )
     {
@@ -2108,6 +2171,7 @@ TopoDS_Shape SMESH_subMesh::getCollection(SMESH_Gen * theGen,
         aBuilder.Add( aCompound, S );
         if ( !subMesh->SubMeshesComputed() )
           theSubComputed = false;
+        theSubs.push_back( subMesh );
       }
     }
   }
@@ -2153,8 +2217,6 @@ const SMESH_Hypothesis* SMESH_subMesh::getSimilarAttached(const TopoDS_Shape&
 SMESH_Hypothesis::Hypothesis_Status
   SMESH_subMesh::CheckConcurentHypothesis (const int theHypType)
 {
-  MESSAGE ("SMESH_subMesh::CheckConcurentHypothesis");
-
   // is there local hypothesis on me?
   if ( getSimilarAttached( _subShape, 0, theHypType ) )
     return SMESH_Hypothesis::HYP_OK;