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0023436: BRepOffsetAPI_ThruSections crashes when lofting through identical profiles

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Adding of test case
This commit is contained in:
jgv 2013-02-01 17:22:26 +04:00
parent 19d6e40d3f
commit aadab519fd
2 changed files with 35 additions and 0 deletions
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22
src/BRepOffsetAPI/BRepOffsetAPI_ThruSections.cxx
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@ -102,7 +102,27 @@
#include <BRepBuilderAPI_FindPlane.hxx>
//=======================================================================
//function : PreciseUpar
//purpose : pins the u-parameter of surface close to U-knot
// to this U-knot
//=======================================================================
static Standard_Real PreciseUpar(const Standard_Real anUpar,
const Handle(Geom_BSplineSurface)& aSurface)
{
Standard_Real Tol = Precision::PConfusion();
Standard_Integer i1, i2;
aSurface->LocateU(anUpar, Tol, i1, i2);
Standard_Real U1 = aSurface->UKnot(i1);
Standard_Real U2 = aSurface->UKnot(i2);
Standard_Real NewU = anUpar;
NewU = (anUpar - U1 < U2 - anUpar)? U1 : U2;
return NewU;
}
//=======================================================================
//function : PerformPlan
@ -629,6 +649,8 @@ void BRepOffsetAPI_ThruSections::CreateSmoothed()
Standard_Real Ui1,Ui2,V0,V1;
Ui1 = i-1;
Ui2 = i;
Ui1 = PreciseUpar(Ui1, surface);
Ui2 = PreciseUpar(Ui2, surface);
V0 = surface->VKnot(surface->FirstVKnotIndex());
V1 = surface->VKnot(surface->LastVKnotIndex());
surface->Segment(Ui1,Ui2,V0,V1);

13
tests/bugs/modalg/bug23436 Executable file
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@ -0,0 +1,13 @@
puts "============"
puts "CR23436"
puts "============"
puts ""
######################################################
# BRepOffsetAPI_ThruSections crashes when lofting through identical profiles
######################################################
restore [locate_data_file bug23436_myloft.brep] s
explode s
thrusections result 0 0 s_1 s_2 s_3