Restructed the osgPresentation and present3D directories back to the structure that was present in OSG-3.2

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14759 16af8721-9629-0410-8352-f15c8da7e697

include/osgPresentation/CompileSlideCallback

@@ -0,0 +1,45 @@
+/* -*-c++-*- Present3D - Copyright (C) 1999-2006 Robert Osfield
+ *
+ * This software is open source and may be redistributed and/or modified under
+ * the terms of the GNU General Public License (GPL) version 2.0.
+ * The full license is in LICENSE.txt file included with this distribution,.
+ *
+ * This software 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
+ * include LICENSE.txt for more details.
+*/
+
+#ifndef OSG_COMPILESLIDECALLBACK
+#define OSG_COMPILESLIDECALLBACK 1
+
+#include <osgViewer/Viewer>
+#include <osgPresentation/Export>
+
+namespace osgPresentation {
+
+class OSGPRESENTATION_EXPORT CompileSlideCallback : public osg::Camera::DrawCallback
+{
+    public:
+
+        CompileSlideCallback():
+            _needCompile(false),
+            _frameNumber(0) {}
+
+        virtual void operator()(const osg::Camera& camera) const;
+
+        void needCompile(osg::Node* node) { _needCompile=true; _sceneToCompile = node; }
+
+    protected:
+
+        virtual ~CompileSlideCallback() {}
+
+        mutable bool                _needCompile;
+        mutable unsigned int        _frameNumber;
+        osg::ref_ptr<osg::Node>     _sceneToCompile;
+
+};
+
+}
+
+#endif