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0031202: Shape Healing - FixMissingSeam creates degenerated edge

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Adding tolerance to prevent degenerated cuts in cases where all vertex tolerance is covered by distance of the edge curve from vertex point.
This commit is contained in:
anv
2019-11-28 12:25:20 +03:00
committed by bugmaster
parent 72f6dc612c
commit 4e8c1d8666
3 changed files with 12 additions and 3 deletions
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10
src/ShapeFix/ShapeFix_ComposeShell.cxx
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@@ -985,8 +985,11 @@ ShapeFix_WireSegment ShapeFix_ComposeShell::SplitWire (ShapeFix_WireSegment &wir
currPnt = myGrid->Value ( currPnt2d );
if ( currPnt.Distance ( lastVPnt ) <= lastVTol &&
lastPnt.Distance ( currPnt ) <= tol &&
// Tolerance is increased to prevent degenerated cuts in cases where all vertex
// tolerance is covered by distance of the edge curve from vertex point.
// Doubled to prevent edge being fully covered by its vertices tolerance (invalid edge).
CheckByCurve3d ( lastVPnt, c3d, f3d+(currPar-firstPar)*(l3d-f3d)/span2d,
T, lastVTol ) &&
T, lastVTol + 2 * Precision::Confusion() ) &&
lastPnt.Distance ( myGrid->Value ( C2d->Value(0.5*(currPar+lastPar)) ) ) <= tol ) {
V = lastV;
Standard_Real uRes = myUResolution;
@@ -1005,8 +1008,11 @@ ShapeFix_WireSegment ShapeFix_ComposeShell::SplitWire (ShapeFix_WireSegment &wir
}
else if ( currPnt.Distance ( prevVPnt ) <= prevVTol &&
prevPnt.Distance ( currPnt ) <= tol &&
// Tolerance is increased to prevent degenerated cuts in cases where all vertex
// tolerance is covered by distance of the edge curve from vertex point.
// Doubled to prevent edge being fully covered by its vertices tolerance (invalid edge).
CheckByCurve3d ( prevVPnt, c3d, f3d+(currPar-firstPar)*(l3d-f3d)/span2d,
T, prevVTol ) &&
T, prevVTol + 2 * Precision::Confusion()) &&
prevPnt.Distance ( myGrid->Value ( C2d->Value(0.5*(currPar+prevPar)) ) ) <= tol ) {
V = prevV;
Standard_Real uRes = myUResolution;