From 8caf5157dd4919effd2c401edbf463ceb5ca1b6e Mon Sep 17 00:00:00 2001
From: dpasukhi <dpasukhi@opencascade.com>
Date: Tue, 28 Jan 2025 12:21:26 +0000
Subject: [PATCH] Modeling - Enhance intersection handling for closed curves in
 IntPatch_Intersection #298

---
 src/IntPatch/IntPatch_Intersection.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/IntPatch/IntPatch_Intersection.cxx b/src/IntPatch/IntPatch_Intersection.cxx
index 4bf83fd567..79ec38baf2 100644
--- a/src/IntPatch/IntPatch_Intersection.cxx
+++ b/src/IntPatch/IntPatch_Intersection.cxx
@@ -195,8 +195,11 @@ void IntPatch_Intersection::Perform(const Handle(Adaptor3d_Surface)&   S1,
                              aProjectedCurve.FirstParameter(),
                              aProjectedCurve.LastParameter());
       Geom2dInt_GInter    Intersector(AC, Precision::Confusion(), Precision::Confusion());
-      if (Intersector.IsDone() && Intersector.IsEmpty())
+      if (Intersector.IsDone()
+          && (Intersector.IsEmpty() || (AC.IsClosed() && Intersector.NbPoints() == 1)))
+      {
         break;
+      }
     }
       Standard_FALLTHROUGH
     default: {