Merged fixes to osgVolume's handling of ImageSequence animated volumes, merge command:

svn merge -r 9746:9747 http://www.openscenegraph.org/svn/osg/OpenSceneGraph/branches/OpenSceneGraph-2.8

include/osgVolume/Layer

@@ -78,6 +78,12 @@ class OSGVOLUME_EXPORT Layer : public osg::Object
         void addProperty(Property* property);
 
 
+        /** Specify whether ImageLayer requires update traversal. */
+        virtual bool requiresUpdateTraversal() const { return false; }
+
+        /** Call update on the Layer.*/
+        virtual void update(osg::NodeVisitor& /*nv*/) {}        
+
         /** increment the modified count."*/
         virtual void dirty() {};
 
@@ -137,6 +143,10 @@ class OSGVOLUME_EXPORT ImageLayer : public Layer
         /** Compute the min color component of the image and then translate and pixels by this offset to make the new min component 0.*/
         void translateMinToZero();
 
+        virtual bool requiresUpdateTraversal() const;
+
+        virtual void update(osg::NodeVisitor& /*nv*/);
+
         virtual void dirty();
         virtual void setModifiedCount(unsigned int value);
         virtual unsigned int getModifiedCount() const;
@@ -175,6 +185,10 @@ class OSGVOLUME_EXPORT CompositeLayer : public Layer
         
         unsigned int getNumLayers() const { return _layers.size(); }
 
+        bool requiresUpdateTraversal() const;
+   
+        virtual void update(osg::NodeVisitor& /*nv*/);
+
     protected:
 
         virtual ~CompositeLayer() {}

include/osgVolume/VolumeTile

@@ -107,7 +107,7 @@ class OSGVOLUME_EXPORT VolumeTile : public osg::Group
         const Locator* getLocator() const { return _locator.get(); }
 
 
-        void setLayer(Layer* layer) { _layer = layer; }
+        void setLayer(Layer* layer);
         Layer* getLayer() { return _layer.get(); }
         const Layer* getLayer() const { return _layer.get(); }