From 316c1a88a95a654badeb5649b4285c76550f3712 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 2 Nov 2010 11:19:17 +0000
Subject: [PATCH] From Javier Taibo, "  In current SVN code, when exporting an
 osgParticle::Particle object to the .osg file format, it crashes if no
 drawable was set in the particle.

  In the attached file (src/osgWrappers/deprecated-dotosg/osgParticle/IO_Particle.cpp) I have added a check for the existence of the drawable before writing it to the file.
"
---
 .../deprecated-dotosg/osgParticle/IO_Particle.cpp  | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/osgWrappers/deprecated-dotosg/osgParticle/IO_Particle.cpp b/src/osgWrappers/deprecated-dotosg/osgParticle/IO_Particle.cpp
index 204725f4f..efb255e2c 100644
--- a/src/osgWrappers/deprecated-dotosg/osgParticle/IO_Particle.cpp
+++ b/src/osgWrappers/deprecated-dotosg/osgParticle/IO_Particle.cpp
@@ -249,12 +249,14 @@ void  write_particle(const osgParticle::Particle &P, osgDB::Output &fw)
     fw.writeObject(*P.getColorInterpolator());
     fw.moveOut();
     fw.indent() << "}" << std::endl;
-    
-    fw.indent() << "drawable {" << std::endl;
-    fw.moveIn();
-    fw.writeObject(*P.getDrawable());
-    fw.moveOut();
-    fw.indent() << "}" << std::endl;
+
+    if ( P.getDrawable() != NULL ) {
+        fw.indent() << "drawable {" << std::endl;
+        fw.moveIn();
+        fw.writeObject(*P.getDrawable());
+        fw.moveOut();
+        fw.indent() << "}" << std::endl;
+    }
 
     fw.moveOut();
     fw.indent() << "}" << std::endl;