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0025453: SIGSEGV in BRepFill_Sweep::BuildShell

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Fixed the bug causing exception when the first edge in generated sweep occurs to be degenerated.

Comments have been added.

Test-case for issue #25453
This commit is contained in:
msv 2014-12-11 15:40:05 +03:00 committed by bugmaster
parent 076ca35c3f
commit 21b7d8be4c
2 changed files with 46 additions and 6 deletions
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30
src/BRepFill/BRepFill_Sweep.cxx
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@ -2465,9 +2465,18 @@ BRepFill_Sweep::BRepFill_Sweep(const Handle(BRepFill_SectionLaw)& Section,
}
if (uclose && (isec==NbLaw)) {
UpdateEdge(TopoDS::Edge(UEdge(1, ipath)),
S, !exuv, ULast);
UEdge(isec+1, ipath) = UEdge(1, ipath);
if (UEdge(1, ipath).IsNull()) //degenerated case
{
UEdge(isec+1, ipath) = BuildEdge(S, !exuv, ULast,
Vertex(isec+1, ipath),
Vertex(isec+1, ipath+1),
myTol3d);
}
else {
UpdateEdge(TopoDS::Edge(UEdge(1, ipath)),
S, !exuv, ULast);
UEdge(isec+1, ipath) = UEdge(1, ipath);
}
}
else {
if (UEdge(isec+1, ipath).IsNull())
@ -2502,9 +2511,18 @@ BRepFill_Sweep::BRepFill_Sweep(const Handle(BRepFill_SectionLaw)& Section,
S, exuv, VFirst);
if (vclose && (ipath == NbPath)) {
UpdateEdge(TopoDS::Edge(VEdge(isec, 1)),
S, exuv, VLast);
VEdge(isec, ipath+1) = VEdge(isec, 1);
if (VEdge(isec, 1).IsNull()) //degenerated case
{
VEdge(isec, ipath+1) = BuildEdge(S, exuv, VLast,
Vertex(isec , ipath+1),
Vertex(isec+1, ipath+1),
myTol3d);
}
else {
UpdateEdge(TopoDS::Edge(VEdge(isec, 1)),
S, exuv, VLast);
VEdge(isec, ipath+1) = VEdge(isec, 1);
}
}
else if (VEdge(isec, ipath+1).IsNull())
VEdge(isec, ipath+1) = BuildEdge(S, exuv, VLast,

22
tests/bugs/modalg_5/bug25453 Normal file
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@ -0,0 +1,22 @@
puts "========"
puts "OCC25453"
puts "========"
puts ""
#########################################
# SIGSEGV in BRepFill_Sweep::BuildShell
#########################################
smallview
restore [locate_data_file OCC25453_sweep9-draw-Sketch001.brep] Sketch001
explode Sketch001 E
wire Sweep-0-spine Sketch001_1
mksweep Sweep-0-spine
setsweep -CF
restore [locate_data_file OCC25453_sweep9-draw-Sketch.brep] Sketch
trotate Sketch 0 0 0 1 0 0 90
addsweep Sketch
buildsweep Sweep -C
fit
set only_screen_axo 1