From 6e6dafcd3e7ca88000b08593d49bb9b8b4247cbb Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 12 Sep 2011 12:26:55 +0000
Subject: [PATCH] From Luc Frauciel, "When osgUtil::DelaunayTriangulator
 triangulate() function ends with no triangle generated, it crashes. This
 patch fixes that"

---
 src/osgUtil/DelaunayTriangulator.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/osgUtil/DelaunayTriangulator.cpp b/src/osgUtil/DelaunayTriangulator.cpp
index 87eccb962..e06c693c6 100644
--- a/src/osgUtil/DelaunayTriangulator.cpp
+++ b/src/osgUtil/DelaunayTriangulator.cpp
@@ -1158,7 +1158,14 @@ bool DelaunayTriangulator::triangulate()
             pt_indices.push_back(ti->c());
         }
     }
-
+    
+    // LF August 2011 fix crash when no triangle is created
+    if (!pt_indices.size())
+    {
+        OSG_WARN << "Warning: DelaunayTriangulator::triangulate(): no triangle generated" << std::endl;
+        return false;        
+    }    
+    
     prim_tris_ = new osg::DrawElementsUInt(GL_TRIANGLES, pt_indices.size(), &(pt_indices.front()));
 
     OSG_INFO << "DelaunayTriangulator: process done, " << prim_tris_->getNumPrimitives() << " triangles remain\n";