From a381cab78b117b852c40bf80f68338905a868a1b Mon Sep 17 00:00:00 2001
From: jgv <jgv@opencascade.com>
Date: Tue, 28 Jul 2015 15:03:22 +0300
Subject: [PATCH] 0026481: Incorrect result of BRepOffsetAPI_MakeOffset: excess
 hanging arcs in the open result with join type GeomAbs_Arc

---
 src/BRepFill/BRepFill_OffsetWire.cxx | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/BRepFill/BRepFill_OffsetWire.cxx b/src/BRepFill/BRepFill_OffsetWire.cxx
index 03dda88f6c..54e0845c9a 100755
--- a/src/BRepFill/BRepFill_OffsetWire.cxx
+++ b/src/BRepFill/BRepFill_OffsetWire.cxx
@@ -827,6 +827,24 @@ void BRepFill_OffsetWire::PerformWithBiLo
     }
   }
 
+  //Remove possible hanging arcs on vertices
+  if (myIsOpenResult && myJoinType == GeomAbs_Arc)
+  {
+    if (!myMap.IsEmpty() &&
+        myMap.FindKey(1).ShapeType() == TopAbs_VERTEX)
+    {
+      //myMap.RemoveFirst();
+      TopoDS_Shape LastShape = myMap.FindKey(myMap.Extent());
+      TopTools_ListOfShape LastList;
+      LastList.Append(myMap(myMap.Extent()));
+      myMap.RemoveLast();
+      if (!myMap.IsEmpty())
+        myMap.Substitute(1, LastShape, LastList);
+    }
+    if (!myMap.IsEmpty() &&
+        myMap.FindKey(myMap.Extent()).ShapeType() == TopAbs_VERTEX)
+      myMap.RemoveLast();
+  }
 
 #ifdef DRAW
   if (AffichEdge) {
-- 
2.39.5