Added initial cut of basic scripting support, introducing an osg::Script object to wrap up the individual scripts, osg::ScriptCallback for assigning a Script as node callback and an osg::ScriptEngine base class that plugins implement to provided support for specific scripting languages.

Provided are lua, python and V8 (for javascript) plugins that just open up enough of a link to the respective libs to run a script, there is no scene graph <-> script communication in current implementation.

src/osgPlugins/lua/LuaScriptEngine.h

@@ -0,0 +1,56 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2013 Robert Osfield
+ *
+ * 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 LUASCRIPTENGINE_H
+#define LUASCRIPTENGINE_H
+
+#include <osg/ScriptEngine>
+
+extern "C" {
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+}
+
+namespace lua
+{
+
+class LuaScriptEngine : public osg::ScriptEngine
+{
+    public:
+        LuaScriptEngine();
+        LuaScriptEngine(const LuaScriptEngine& rhs, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
+
+        META_Object(lua, LuaScriptEngine)
+
+        virtual const std::string& getLanguage() const { return _language; }
+
+        /** run a Script.*/
+        virtual void run(osg::Script* script);
+
+        /** get the lua_State object.*/
+        lua_State* getLuaState() { return _lua; }
+
+    protected:
+
+        void initialize();
+
+        virtual ~LuaScriptEngine();
+
+        lua_State* _lua;
+};
+
+
+}
+
+#endif