0024108: Boolean fuse fails

Tolerance of checking distance between vertex and edge in BOPInt_Context::ComputeVE() increased by additional Precision::Confusion() to allow for interference to be detected in this particular case.

Two tests added for this issue: one with original shapes and another in rotated co-ordinates

src/BOPInt/BOPInt_Context.cxx

@@ -466,10 +466,13 @@
   }
   //
   aDist=aProjector.LowerDistance();
-  //
+
+  // tolerance of check for coincidence is sum of tolerances of edge and vertex 
+  // extended by additional Precision::Confusion() to allow for interference where
+  // it is very close but not fit to tolerance (see #24108)
   aTolV1=BRep_Tool::Tolerance(aV1);
   aTolE2=BRep_Tool::Tolerance(aE2);
-  aTolSum=aTolV1+aTolE2;
+  aTolSum = aTolV1 + aTolE2 + Precision::Confusion();
   //
   aT=aProjector.LowerDistanceParameter();
   if (aDist > aTolSum) {

src/Extrema/Extrema_ExtPElC.cxx

@@ -25,12 +25,16 @@
 #include <Standard_NotImplemented.hxx>
 #include <Precision.hxx>
 
-
+//=======================================================================
-//=============================================================================
+//function : Extrema_ExtPElC
-
+//purpose  : 
+//=======================================================================
 Extrema_ExtPElC::Extrema_ExtPElC () { myDone = Standard_False; }
-//=============================================================================
 
+//=======================================================================
+//function : Extrema_ExtPElC
+//purpose  : 
+//=======================================================================
 Extrema_ExtPElC::Extrema_ExtPElC (const gp_Pnt&       P, 
 				  const gp_Lin&       L,
 				  const Standard_Real Tol,
@@ -39,7 +43,10 @@ Extrema_ExtPElC::Extrema_ExtPElC (const gp_Pnt&       P,
 {
   Perform(P, L, Tol, Uinf, Usup);
 }
-
+//=======================================================================
+//function : Perform
+//purpose  : 
+//=======================================================================
 void Extrema_ExtPElC::Perform(const gp_Pnt&       P, 
 			      const gp_Lin&       L,
 			      const Standard_Real Tol,
@@ -48,7 +55,7 @@ void Extrema_ExtPElC::Perform(const gp_Pnt&       P,
 {
   myDone = Standard_False;
   myNbExt = 0;
-  gp_Vec V1 = gp_Vec(L.Direction());
+  gp_Vec V1 (L.Direction());
   gp_Pnt OR = L.Location();
   gp_Vec V(OR, P);
   Standard_Real Mydist = V1.Dot(V);
@@ -124,7 +131,6 @@ Method:
   Usol[1] = Usol[0] + M_PI;
 
   Standard_Real myuinf = Uinf;
-  //modified by NIZNHY-PKV Fri Apr 20 15:03:28 2001 f
   //Standard_Real TolU = Tol*C.Radius();
   Standard_Real TolU, aR;
   aR=C.Radius();
@@ -132,7 +138,7 @@ Method:
   if (aR > gp::Resolution()) {
     TolU= Tol/aR;
   }
-  //modified by NIZNHY-PKV Fri Apr 20 15:03:32 2001 t
+  //
   ElCLib::AdjustPeriodic(Uinf, Uinf+2*M_PI, TolU, myuinf, Usol[0]);
   ElCLib::AdjustPeriodic(Uinf, Uinf+2*M_PI, TolU, myuinf, Usol[1]);
   if (((Usol[0]-2*M_PI-Uinf) < TolU) && ((Usol[0]-2*M_PI-Uinf) > -TolU)) Usol[0] = Uinf;

tests/bugs/moddata_3/bug24108

@@ -0,0 +1,40 @@
+puts "============"
+puts "CR24108"
+puts "============"
+puts ""
+#######################################################################
+# Boolean fuse fails
+#######################################################################
+
+puts "Load first shape ..."
+restore [locate_data_file bug24108_face_411.brep] b1 
+puts "Load second shape ..."
+restore [locate_data_file bug24108_face_514.brep] b2 
+
+explode b1 f
+explode b2 f
+
+copy b1_1 b1
+copy b2_1 b2
+
+puts "Prepare boolean operation ..."
+bop b1 b2
+
+puts "Start boolean operation ..."
+bopfuse result
+puts "Finish boolean operation ..."
+
+set square 1328.78
+
+# Analysis of "nbshapes result"
+set nb_v_good 37
+set nb_e_good 39
+set nb_w_good 4
+set nb_f_good 3
+set nb_sh_good 1
+set nb_sol_good 0
+set nb_compsol_good 0
+set nb_compound_good 1
+set nb_shape_good 85
+
+set 3dviewer 1

tests/bugs/moddata_3/bug24108_2

@@ -0,0 +1,45 @@
+puts "============"
+puts "CR24108"
+puts "============"
+puts ""
+#######################################################################
+# Boolean fuse fails
+# -- test #2: in rotated co-ordinates --
+#######################################################################
+
+puts "Load first shape ..."
+restore [locate_data_file bug24108_face_411.brep] b1 
+puts "Load second shape ..."
+restore [locate_data_file bug24108_face_514.brep] b2 
+
+puts "Rotate shapes by 45 deg around Z .."
+trotate b1 0 0 0 0 0 1 45.
+trotate b2 0 0 0 0 0 1 45.
+
+explode b1 f
+explode b2 f
+
+copy b1_1 b1
+copy b2_1 b2
+
+puts "Prepare boolean operation ..."
+bop b1 b2
+
+puts "Start boolean operation ..."
+bopfuse result
+puts "Finish boolean operation ..."
+
+set square 1328.78
+
+# Analysis of "nbshapes result"
+set nb_v_good 37
+set nb_e_good 39
+set nb_w_good 4
+set nb_f_good 3
+set nb_sh_good 1
+set nb_sol_good 0
+set nb_compsol_good 0
+set nb_compound_good 1
+set nb_shape_good 85
+
+set 3dviewer 1