From fb9591d6bc1f8b6656395c8a3adf3807705982d8 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 24 Jun 2016 10:02:39 +0100
Subject: [PATCH] Added handling of zero points

---
 src/osgUtil/PolytopeIntersector.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/osgUtil/PolytopeIntersector.cpp b/src/osgUtil/PolytopeIntersector.cpp
index 8cdc1eb4b..10492d34e 100644
--- a/src/osgUtil/PolytopeIntersector.cpp
+++ b/src/osgUtil/PolytopeIntersector.cpp
@@ -49,8 +49,15 @@ namespace PolytopeIntersectorUtils
                 if (distance > _maxDistance) _maxDistance = distance;
                 if (_numPoints==MaxNumIntesections) break;
             }
-            center /= value_type(_numPoints);
-            _distance = referencePlane.distance( center );
+            if (_numPoints>0)
+            {
+                center /= value_type(_numPoints);
+                _distance = referencePlane.distance( center );
+            }
+            else
+            {
+                _distance = _maxDistance;
+            }
         }
         bool operator<(const PolytopeIntersection& rhs) const { return _distance < rhs._distance; }