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0030752: Canonical recognition - converts bspline curve into huge ellipse

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Add additional check for very thin result ellipse during conversion curve to ellipse.
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ika 2024-06-05 17:19:44 +01:00
parent 2736652117
commit de6ecd3af1
1 changed files with 29 additions and 0 deletions
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29
src/GeomConvert/GeomConvert_CurveToAnaCurve.cxx
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@ -16,6 +16,7 @@
#include <ElCLib.hxx>
#include <Extrema_ExtPC.hxx>
#include <gce_MakeCirc.hxx>
#include <Geom_BezierCurve.hxx>
#include <Geom_BSplineCurve.hxx>
@ -24,6 +25,7 @@
#include <Geom_Ellipse.hxx>
#include <Geom_Line.hxx>
#include <Geom_TrimmedCurve.hxx>
#include <GeomAdaptor_Curve.hxx>
#include <gp_Ax2.hxx>
#include <gp_Ax3.hxx>
#include <gp_Circ.hxx>
@ -622,6 +624,33 @@ if (Q2 > 0 && Q1*Q3 < 0) {
cl = ElCLib::InPeriod(cl, cm, cm + PI2);
res = gell;
// reverse test for 20 points for cases of very thin and long ellipse (#30752)
if ((1 - anEllipse.Eccentricity()) < tol)
{
GeomAdaptor_Curve anAdpt(c3d);
Extrema_ExtPC aProj;
aProj.Initialize(anAdpt, c1, c2);
Standard_Real aTol2 = tol * tol;
Standard_Real aDelta = (cl - cf) / 20;
for (int aPntId = 1; aPntId <= 20; aPntId++)
{
gp_Pnt anEllPnt = res->Value(cf + aPntId * aDelta);
aProj.Perform(anEllPnt);
if (aProj.IsDone())
{
Standard_Real anExtDist = aProj.SquareDistance(1);
for (int anExtInd = 2; anExtInd <= aProj.NbExt(); anExtInd++)
{
Standard_Real aDist = aProj.SquareDistance(anExtInd);
if (anExtDist < aDist)
aDist = anExtDist;
}
if (anExtDist > aTol2)
return NULL; // not done
}
}
}
}
}
/*