From Cedric Pinson, Pulled in osgAnimation from OpenSceneGraph-osgWidget-dev into svn/trunk.

include/osgAnimation/Assert

@@ -0,0 +1,49 @@
+/*  -*-c++-*- 
+ *  Copyright (C) 2008 Cedric Pinson <mornifle@plopbyte.net>
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef OSGANIMATION_ASSERT_H
+#define OSGANIMATION_ASSERT_H
+
+#include <string>
+#include <sstream>
+#include <exception>
+
+namespace osgAnimation
+{
+
+    struct ThrowAssert  : public std::exception
+    {
+        virtual const char* what() const throw () { return mMsg.c_str();}
+
+        std::string mMsg;
+        ThrowAssert(const std::string& msg, const char* file, int line ) 
+        {
+            std::stringstream ss;
+            ss << "Assert (" << msg << ") in file " << file << " at line " << line; 
+            mMsg = ss.str();
+        }
+
+        ThrowAssert() {}
+        virtual ~ThrowAssert() throw () {}
+    };
+}
+
+#ifdef OSGANIMATION_ASSERT_THROW
+#define OSGANIMATION_ASSERT(a)  if (!(a)) throw osgAnimation::ThrowAssert(std::string(#a),__FILE__,__LINE__);
+
+#else 
+#define OSGANIMATION_ASSERT(a)  {if (!(a)) *((int*)0) = 0;}
+#endif
+
+#endif