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0027679: Wrong offset: overlapping edges

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Method BRepFill_OffsetWire::UpdateDetromp(...) is modified for correct treatment of closed bisectors.

Test case for issue #27679
This commit is contained in:
ifv 2016-07-15 10:42:09 +03:00 committed by bugmaster
parent 56091b56ac
commit c65f82013b
2 changed files with 27 additions and 3 deletions
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14
src/BRepFill/BRepFill_OffsetWire.cxx
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@ -1310,7 +1310,15 @@ void BRepFill_OffsetWire::UpdateDetromp (BRepFill_DataMapOfOrientedShapeListOfSh
TopoDS_Vertex V1,V2;
const Handle(Geom2d_Curve)& Bis = Bisec.Value();
Standard_Boolean ForceAdd = Standard_False;
Handle(Geom2d_TrimmedCurve) aTC = Handle(Geom2d_TrimmedCurve)::DownCast(Bis);
if(!aTC.IsNull() && aTC->BasisCurve()->IsPeriodic())
{
gp_Pnt2d Pf = Bis->Value(Bis->FirstParameter());
gp_Pnt2d Pl = Bis->Value(Bis->LastParameter());
ForceAdd = Pf.Distance(Pl) <= Precision::Confusion();
}
U1 = Bis->FirstParameter();
if (SOnE) {
@ -1324,7 +1332,7 @@ void BRepFill_OffsetWire::UpdateDetromp (BRepFill_DataMapOfOrientedShapeListOfSh
V2 = TopoDS::Vertex(Vertices.Value(ii));
gp_Pnt2d P = Bis->Value((U2 + U1)*0.5);
if (!Trim.IsInside(P)) {
if (!Trim.IsInside(P) || ForceAdd) {
if (!V1.IsNull()) {
Detromp(Shape1).Append(V1);
Detromp(Shape2).Append(V1);
@ -1342,7 +1350,7 @@ void BRepFill_OffsetWire::UpdateDetromp (BRepFill_DataMapOfOrientedShapeListOfSh
if (!EOnE) {
if (!Precision::IsInfinite(U2)) {
gp_Pnt2d P = Bis->Value((U2 + U1)*0.5);
if (!Trim.IsInside(P)) {
if (!Trim.IsInside(P) || ForceAdd) {
if (!V1.IsNull()) {
Detromp(Shape1).Append(V1);
Detromp(Shape2).Append(V1);

16
tests/bugs/modalg_6/bug27679 Normal file
View File

@ -0,0 +1,16 @@
puts "========"
puts "OCC27679"
puts "========"
puts ""
###################################
# Wrong offset: overlapping edges
###################################
restore [locate_data_file bug27679_w.brep] w
mkoffset r w 1 20
renamevar r_1 result
checknbshapes result -edge 23
checkview -display result -2d -path ${imagedir}/${test_image}.png