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0030790: [REGRESSION] Modeling Algorithms - Crash when loading specific step file

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The problem occurred when the algorithm IntCurvesFace_Intersector was called for a face occupying zero extension along V direction. This is obviously a bad face, but we need to have the algorithm not crashing the application. So, the algorithm has been protected against such input data. At attempt to make calculations it establishes NotDone status.

Bad test case tests/de/step_3/D9 has been updated.
False memory leak detection has been suppressed in tests/bugs/fclasses/bug7287_2.
This commit is contained in:
msv
2019-07-15 19:47:14 +03:00
committed by bugmaster
parent 0dab581700
commit e8dec5e171
5 changed files with 30 additions and 9 deletions
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21
src/IntCurvesFace/IntCurvesFace_Intersector.cxx
View File

@@ -132,6 +132,7 @@ IntCurvesFace_Intersector::IntCurvesFace_Intersector(const TopoDS_Face& Face,
:
Tol(aTol),
done(Standard_False),
myReady(Standard_False),
nbpnt(0),
PtrOnPolyhedron(NULL),
PtrOnBndBounding(NULL),
@@ -175,7 +176,7 @@ IntCurvesFace_Intersector::IntCurvesFace_Intersector(const TopoDS_Face& Face,
if (nbsu > aMaxSamples) nbsu = aMaxSamples;
if (nbsv > aMaxSamples) nbsv = aMaxSamples;
if (dU > gp::Resolution() && dV > gp::Resolution()) {
if (dU > Precision::Confusion() && dV > Precision::Confusion()) {
if (Max(dU, dV) > Min(dU, dV) * aTresh)
{
aMinSamples = 10;
@@ -190,12 +191,7 @@ IntCurvesFace_Intersector::IntCurvesFace_Intersector(const TopoDS_Face& Face,
}
}
else {
if (dU < gp::Resolution()) {
nbsu = 1;
}
if (dV < gp::Resolution()) {
nbsv = 1;
}
return; // surface has no extension along one of directions
}
Standard_Integer NbUOnS = Hsurface->NbUIntervals(GeomAbs_C2);
@@ -215,6 +211,7 @@ IntCurvesFace_Intersector::IntCurvesFace_Intersector(const TopoDS_Face& Face,
new IntCurveSurface_ThePolyhedronOfHInter(Hsurface,nbsu,nbsv,U0,V0,U1,V1);
}
}
myReady = Standard_True;
}
//=======================================================================
//function : InternalCall
@@ -350,6 +347,11 @@ void IntCurvesFace_Intersector::Perform(const gp_Lin& L,
const Standard_Real ParMin,
const Standard_Real ParMax)
{
done = Standard_False;
if (!myReady)
{
return;
}
done = Standard_True;
SeqPnt.Clear();
mySeqState.Clear();
@@ -428,6 +430,11 @@ void IntCurvesFace_Intersector::Perform(const Handle(Adaptor3d_HCurve)& HCu,
const Standard_Real ParMin,
const Standard_Real ParMax)
{
done = Standard_False;
if (!myReady)
{
return;
}
done = Standard_True;
SeqPnt.Clear();
// Modified by skv - Wed Sep 3 16:14:10 2003 OCC578 Begin

1
src/IntCurvesFace/IntCurvesFace_Intersector.hxx
View File

@@ -160,6 +160,7 @@ private:
IntCurveSurface_SequenceOfPnt SeqPnt;
TColStd_SequenceOfInteger mySeqState;
Standard_Boolean done;
Standard_Boolean myReady;
Standard_Integer nbpnt;
TopoDS_Face face;
Standard_Address PtrOnPolyhedron;