2.8 branch: backport of osgAnimation from svn head 11026.

include/osgAnimation/StackedTransformElement

@@ -0,0 +1,42 @@
+/*  -*-c++-*- 
+ *  Copyright (C) 2009 Cedric Pinson <cedric.pinson@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_STACKED_TRANSFORM_ELEMENT
+#define OSGANIMATION_STACKED_TRANSFORM_ELEMENT 1
+
+#include <osgAnimation/Export>
+#include <osg/Object>
+#include <osg/Matrix>
+
+namespace osgAnimation
+{
+    class Target;
+    class OSGANIMATION_EXPORT StackedTransformElement : public osg::Object
+    {
+    public:
+        StackedTransformElement() {}
+        StackedTransformElement(const StackedTransformElement& rhs, const osg::CopyOp& c) : osg::Object(rhs, c) {}
+        virtual void applyToMatrix(osg::Matrix& matrix) const = 0;
+        virtual osg::Matrix getAsMatrix() const = 0;
+        virtual bool isIdentity() const = 0;
+        virtual void update() = 0;
+        virtual Target* getOrCreateTarget() {return 0;}
+        virtual Target* getTarget() {return 0;}
+        virtual const Target* getTarget() const {return 0;}
+    };
+
+}
+
+#endif