From d1d2299f42f5966056080be321bbf8cf479fd124 Mon Sep 17 00:00:00 2001
From: ifv <igor.feoktistov@opencascade.com>
Date: Thu, 19 Aug 2021 15:05:53 +0300
Subject: [PATCH] 0030422: Random behaviour of BRepAdaptor_CompCurve

BRepTools/BRepTools_WireExplorer.cxx - replace MapOfShape vmap by IndexedMapOfShape
to avoid random behavior of algorithm
---
 src/BRepTools/BRepTools_WireExplorer.cxx | 30 +++++++++++++++++-------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/src/BRepTools/BRepTools_WireExplorer.cxx b/src/BRepTools/BRepTools_WireExplorer.cxx
index 4a71206512..ca2c028916 100644
--- a/src/BRepTools/BRepTools_WireExplorer.cxx
+++ b/src/BRepTools/BRepTools_WireExplorer.cxx
@@ -226,7 +226,8 @@ void  BRepTools_WireExplorer::Init(const TopoDS_Wire& W,
   }
 
   // map of vertices to know if the wire is open
-  TopTools_MapOfShape vmap;
+  //TopTools_MapOfShape vmap;
+  TopTools_IndexedMapOfShape vmap;
   //  map of infinite edges
   TopTools_MapOfShape anInfEmap;
 
@@ -255,14 +256,16 @@ void  BRepTools_WireExplorer::Init(const TopoDS_Wire& W,
       // add or remove in the vertex map
       V1.Orientation(TopAbs_FORWARD);
       if (!vmap.Add(V1))
-        vmap.Remove(V1);
+        //vmap.Remove(V1);
+      vmap.RemoveKey(V1);
     }
 
     if (!V2.IsNull())
     {
       V2.Orientation(TopAbs_REVERSED);
       if (!vmap.Add(V2))
-        vmap.Remove(V2);
+        //vmap.Remove(V2);
+      vmap.RemoveKey(V2);
     }
 
     if (V1.IsNull() || V2.IsNull())
@@ -294,13 +297,24 @@ void  BRepTools_WireExplorer::Init(const TopoDS_Wire& W,
   }
 
   // if vmap is not empty the wire is open, let us find the first vertex
+  V1.Nullify();
+  V2.Nullify();
   if (!vmap.IsEmpty()) {
-    TopTools_MapIteratorOfMapOfShape itt(vmap);
-    while (itt.Key().Orientation() != TopAbs_FORWARD) {
-      itt.Next();
-      if (!itt.More()) break;
+    //TopTools_MapIteratorOfMapOfShape itt(vmap);
+    //while (itt.Key().Orientation() != TopAbs_FORWARD) {
+    //  itt.Next();
+    //  if (!itt.More()) break;
+    //}
+    //if (itt.More()) V1 = TopoDS::Vertex(itt.Key());
+    Standard_Integer ind = 0;
+    for (ind = 1; ind <= vmap.Extent(); ++ind)
+    {
+      if (vmap(ind).Orientation() == TopAbs_FORWARD)
+      {
+        V1 = TopoDS::Vertex(vmap(ind));
+        break;
+      }
     }
-    if (itt.More()) V1 = TopoDS::Vertex(itt.Key());
   }
   else {
     //   The wire is infinite Try to find the first vertex. It may be NULL.
-- 
2.39.5