From 2826a25d32dec49fc3c143f13b3e9059506e7409 Mon Sep 17 00:00:00 2001
From: mpa <mpa@opencascade.com>
Date: Fri, 28 Jun 2013 06:32:32 +0000
Subject: [PATCH] fix problem of polyline selection 0021950: EDF 2311 SMESH :
 Polyline selection in SMESH

---
 src/SVTK/SVTK_AreaPicker.cxx | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/SVTK/SVTK_AreaPicker.cxx b/src/SVTK/SVTK_AreaPicker.cxx
index 28bd23b44..12f4d15a2 100644
--- a/src/SVTK/SVTK_AreaPicker.cxx
+++ b/src/SVTK/SVTK_AreaPicker.cxx
@@ -415,13 +415,10 @@ bool SVTK_AreaPicker::isPointInPolygon( const QPoint& thePoint, const QVector<QP
     double del = last_pt.x() * cur_pt.y() - cur_pt.x() * last_pt.y();
     double xy = cur_pt.x() * last_pt.x() + cur_pt.y() * last_pt.y();
 
-    sum +=
-        ( atan(
-            ( last_pt.x() * last_pt.x() + last_pt.y() * last_pt.y() - xy )
-                / del )
-            + atan(
-                ( cur_pt.x() * cur_pt.x() + cur_pt.y() * cur_pt.y() - xy )
-                    / del ) );
+    if ( del )
+      sum +=
+      ( atan( ( last_pt.x() * last_pt.x() + last_pt.y() * last_pt.y() - xy ) / del )
+      + atan( ( cur_pt.x() * cur_pt.x() + cur_pt.y() * cur_pt.y() - xy ) / del ) );
 
     last_pt = cur_pt;
   }
-- 
2.39.2