0026444: Boolean operation "bcut" gives invalid result between solid and halfspace solid.

class BOPAlgo_PaveFiller
method void BOPAlgo_PaveFiller::PutPaveOnCurve
  (const Standard_Integer nV,
   const Standard_Real aTolR3D,
   BOPDS_Curve& aNC,
   const BOPCol_MapOfInteger& aMI,
   BOPCol_DataMapOfIntegerReal& aMVTol,
   const Standard_Integer iCheckExtend)

Do not put the pave on the curve in case if there is already one with the same parameter.
Update tolerance of the existing vertex to reach the new one.

Added test case bugs/modalg_6/bug26444.
Test boolean/volumemaker/G1 is stable now (deleted TODOs), test offset/faces_type_i/C9 is bad (offset is done with wrong result).

src/BOPAlgo/BOPAlgo_PaveFiller_6.cxx

@@ -1740,41 +1740,70 @@ void BOPAlgo_PaveFiller::RemoveUsedVertices(BOPDS_Curve& aNC,
    const Standard_Integer iCheckExtend)
 {
   Standard_Boolean bIsVertexOnLine;
-  Standard_Real aT, aTol, aTolNew;
-  BOPDS_Pave aPave;
+  Standard_Real aT, aTolV;
   //
-  const TopoDS_Vertex aV = (*(TopoDS_Vertex *)(&myDS->Shape(nV)));
+  const TopoDS_Vertex& aV = (*(TopoDS_Vertex *)(&myDS->Shape(nV)));
   Handle(BOPDS_PaveBlock)& aPB=aNC.ChangePaveBlock1();
   const IntTools_Curve& aIC = aNC.Curve();
   //
   bIsVertexOnLine=myContext->IsVertexOnLine(aV, aIC, aTolR3D, aT);
   if (!bIsVertexOnLine && iCheckExtend) {
-    aTol = BRep_Tool::Tolerance(aV);
+    aTolV = BRep_Tool::Tolerance(aV);
     //
-    ExtendedTolerance(nV, aMI, aTol, iCheckExtend);
-    bIsVertexOnLine=myContext->IsVertexOnLine(aV, aTol, aIC, aTolR3D, aT);
+    ExtendedTolerance(nV, aMI, aTolV, iCheckExtend);
+    bIsVertexOnLine=myContext->IsVertexOnLine(aV, aTolV, aIC, aTolR3D, aT);
   }
   //
   if (bIsVertexOnLine) {
-    aPave.SetIndex(nV);
-    aPave.SetParameter(aT);
+    // check if aPB contains the parameter aT
+    Standard_Boolean bExist;
+    Standard_Integer nVToUpdate;
+    Standard_Real aPTol, aDist, aTolVNew, aTolV2, aDTol;
+    TopoDS_Vertex aVToUpdate;
+    gp_Pnt aP1, aP2;
     //
-    aPB->AppendExtPave(aPave);
+    aTolV2 = 0.;
+    aDTol = 1.e-12;
     //
-    aTol = BRep_Tool::Tolerance(aV);
+    GeomAdaptor_Curve aGAC(aIC.Curve());
+    aPTol = aGAC.Resolution(aTolR3D);
     //
-    BOPTools_AlgoTools::UpdateVertex (aIC, aT, aV);
-    //
-    if (!aMVTol.IsBound(nV)) {
-      aTolNew = BRep_Tool::Tolerance(aV);
-      if (aTolNew > aTol) {
-        aMVTol.Bind(nV, aTol);
-      }
+    bExist = aPB->ContainsParameter(aT, aPTol, nVToUpdate);
+    if (bExist) {
+      // use existing pave
+      aP1 = BRep_Tool::Pnt(aV);
+      aTolV2 = BRep_Tool::Tolerance(aV);
+      aVToUpdate = (*(TopoDS_Vertex *)(&myDS->Shape(nVToUpdate)));
+    }
+    else {
+      // add new pave
+      BOPDS_Pave aPave;
+      aPave.SetIndex(nV);
+      aPave.SetParameter(aT);
+      aPB->AppendExtPave(aPave);
+      //
+      aP1 = aGAC.Value(aT);
+      nVToUpdate = nV;
+      aVToUpdate = aV;
+    }
+    //
+    aTolV = BRep_Tool::Tolerance(aVToUpdate);
+    aP2 = BRep_Tool::Pnt(aVToUpdate);
+    aDist = aP1.Distance(aP2);
+    aTolVNew = aDist - aTolV2;
+    //
+    if (aTolVNew > aTolV) {
+      BRep_Builder aBB;
+      aBB.UpdateVertex(aVToUpdate, aTolVNew+aDTol);
+      //
+      if (!aMVTol.IsBound(nVToUpdate)) {
+        aMVTol.Bind(nVToUpdate, aTolV);
+      }
+      // 
+      BOPDS_ShapeInfo& aSIDS=myDS->ChangeShapeInfo(nVToUpdate);
+      Bnd_Box& aBoxDS=aSIDS.ChangeBox();
+      BRepBndLib::Add(aVToUpdate, aBoxDS);
     }
-    // 
-    BOPDS_ShapeInfo& aSIDS=myDS->ChangeShapeInfo(nV);
-    Bnd_Box& aBoxDS=aSIDS.ChangeBox();
-    BRepBndLib::Add(aV, aBoxDS);
   }
 }
 
@@ -2194,7 +2223,7 @@ void BOPAlgo_PaveFiller::UpdatePaveBlocks
         }
         //
         if (bRebuild) {
-          nSp = SplitEdge(aPB->Edge(), nV[0], aT[0], nV[1], aT[1]);
+          nSp = SplitEdge(aPB->OriginalEdge(), nV[0], aT[0], nV[1], aT[1]);
           if (bCB) {
             aCB->SetEdge(nSp);
           }

src/BOPAlgo/BOPAlgo_PaveFiller_8.cxx

@@ -244,7 +244,7 @@ static
                                      const Handle(BOPDS_PaveBlock)& aPBD)
 {
   Standard_Boolean bXDir, bIsDone;
-  Standard_Integer nE, aNbPoints, j;
+  Standard_Integer nE, aNbPoints, j, anInd;
   Standard_Real aTD1, aTD2, aT1, aT2, aTolInter, aX, aDT;
   Standard_Real aTolCmp;
   gp_Pnt2d aP2d1, aP2d2, aP2D;
@@ -329,7 +329,7 @@ static
         continue; 
       }
       //
-      if (aPBD->ContainsParameter(aX, aDT)) {
+      if (aPBD->ContainsParameter(aX, aDT, anInd)) {
         continue;
       }
       aPave.SetParameter(aX);

src/BOPDS/BOPDS_PaveBlock.cdl

@@ -186,13 +186,15 @@ is
 	 
     ContainsParameter(me; 
         thePrm:Real from Standard; 
-        theTol:Real from Standard) 
+        theTol:Real from Standard;
+        theInd: in out Integer from Standard) 
     returns Boolean from Standard; 
     ---Purpose: 
     --- Query 
     --- Returns true if the extra paves contain the pave 
     --- with given value of the parameter <thePrm> 
     ---  <theTol>  - the value of the tolerance to compare 
+    ---  <theInd>  - index of the found pave
  
     -- 
     -- shrunk data   

src/BOPDS/BOPDS_PaveBlock.cxx

@@ -234,21 +234,19 @@
 //purpose  : 
 //=======================================================================
   Standard_Boolean BOPDS_PaveBlock::ContainsParameter(const Standard_Real theT,
-                                                      const Standard_Real theTol)const
+                                                      const Standard_Real theTol,
+                                                      Standard_Integer& theInd) const
 {
   Standard_Boolean bRet;
-  Standard_Real dT;
   BOPDS_ListIteratorOfListOfPave aIt;
   //
-  bRet=Standard_False;
+  bRet = Standard_False;
   aIt.Initialize(myExtPaves);
   for (; aIt.More(); aIt.Next()) {
-    dT=aIt.Value().Parameter()-theT;
-    if (dT<0.) {
-      dT=-dT;
-    }
-    if (dT<theTol) {
-      bRet=!bRet;
+    const BOPDS_Pave& aPave = aIt.Value();
+    bRet = (Abs(aPave.Parameter() - theT) < theTol);
+    if (bRet) {
+      theInd = aPave.Index();
       break;
     }
   }

tests/boolean/volumemaker/G1

@@ -2,9 +2,6 @@
 # cone cylinder plane
 # Error status: 102
 
-puts "TODO OCC26020 ALL: Error status"
-puts "TODO OCC26020 ALL: TEST INCOMPLETE"
-
 # conical face 
 cone con_f1 -59.814698440000001 384.36473473000001 127 0.41716766026590824 -0.90882954575006414 -5.4874902763032048e-016 89.995898744693349 0
 erase con_f1

tests/bugs/modalg_6/bug26444

@@ -0,0 +1,17 @@
+puts "========"
+puts "OCC26444"
+puts "========"
+puts ""
+####################################################################################
+# Boolean operation "bcut" gives invalid result between solid and halfspace solid.
+####################################################################################
+
+restore [locate_data_file bug26444_cutting_shape.brep] a
+restore [locate_data_file bug26444_shape_to_cut.brep] b
+restore [locate_data_file bug26444_ref_out.brep] p2
+dump p2
+halfspace s1 a -0.541421905726473 0.200000002980232 0.00899999961256981
+bcut result b s1
+
+set square 0.106547
+set 2dviewer 1

tests/offset/faces_type_i/C9

@@ -1,5 +1,5 @@
-puts "TODO OCC23748 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC23547 ALL: TEST INCOMPLETE"
+puts "TODO OCC23748 ALL: Faulty shapes in variables faulty_1 to faulty_"
+puts "TODO OCC23547 ALL: Error : The volume of the resulting shape is"
 psphere s 15 270
 
 OFFSETSHAPE 1 {s_2} $calcul $type