From b10121c96c858fda6a7861d0a6764304bb7bc140 Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Tue, 11 Apr 2017 15:14:49 +0300
Subject: [PATCH] Issue #2127: arc disappears after move

Workaround for Debian 8.0: project end point when building an arc
---
 src/GeomAlgoAPI/GeomAlgoAPI_EdgeBuilder.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/GeomAlgoAPI/GeomAlgoAPI_EdgeBuilder.cpp b/src/GeomAlgoAPI/GeomAlgoAPI_EdgeBuilder.cpp
index 8cb921538..a1ada3eca 100644
--- a/src/GeomAlgoAPI/GeomAlgoAPI_EdgeBuilder.cpp
+++ b/src/GeomAlgoAPI/GeomAlgoAPI_EdgeBuilder.cpp
@@ -191,7 +191,11 @@ std::shared_ptr<GeomAPI_Edge> GeomAlgoAPI_EdgeBuilder::lineCircleArc(
   gp_Circ aCircle(gp_Ax2(aCenter, aDir), aRadius);
 
   const gp_Pnt& aStart = theStartPoint->impl<gp_Pnt>();
-  const gp_Pnt& anEnd = theEndPoint->impl<gp_Pnt>();
+  const gp_Pnt& anEndInter = theEndPoint->impl<gp_Pnt>();
+
+  // project end point to a circle
+  gp_XYZ aEndDir = anEndInter.XYZ() - aCenter.XYZ();
+  gp_Pnt anEnd(aCenter.XYZ() + aEndDir.Normalized() * aRadius);
 
   BRepBuilderAPI_MakeEdge anEdgeBuilder;
   anEdgeBuilder = BRepBuilderAPI_MakeEdge(aCircle, aStart, anEnd);
-- 
2.39.2