From b88b0cf7fc86ccf53d0f833ea54a47e6995f6d65 Mon Sep 17 00:00:00 2001
From: kgv <kgv@opencascade.com>
Date: Sun, 9 Oct 2016 21:59:58 +0300
Subject: [PATCH] 0027944: Visualization, V3d_View - filter duplicates within
 ::AddClipPlane()

---
 src/V3d/V3d_View_2.cxx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/V3d/V3d_View_2.cxx b/src/V3d/V3d_View_2.cxx
index 597c97a6a1..ce30c49bee 100644
--- a/src/V3d/V3d_View_2.cxx
+++ b/src/V3d/V3d_View_2.cxx
@@ -150,6 +150,18 @@ void V3d_View::AddClipPlane (const Handle(Graphic3d_ClipPlane)& thePlane)
   {
     aSeqOfPlanes = new Graphic3d_SequenceOfHClipPlane();
   }
+  else
+  {
+    for (Graphic3d_SequenceOfHClipPlane::Iterator aPlaneIt (*aSeqOfPlanes); aPlaneIt.More(); aPlaneIt.Next())
+    {
+      const Handle(Graphic3d_ClipPlane)& aPlane = aPlaneIt.Value();
+      if (aPlane == thePlane)
+      {
+        // plane is already defined in view
+        return;
+      }
+    }
+  }
 
   aSeqOfPlanes->Append (thePlane);
   SetClipPlanes (aSeqOfPlanes);