Added sorting and clearing of pre and post RenderStages stored in RenderStage,

and added some debugging comments which are currently commented out from compilation -
these are left in just in case future debug work requires them.

include/osgUtil/RenderBin

@@ -97,7 +97,7 @@ class OSGUTIL_EXPORT RenderBin : public osg::Object
             _stateGraphList.push_back(rg);
         }
 
-        void sort();
+        virtual void sort();
 
         virtual void sortImplementation();
     

include/osgUtil/RenderLeaf

@@ -66,7 +66,7 @@ class OSGUTIL_EXPORT RenderLeaf : public osg::Referenced
 
     public:
     
-        StateGraph*                    _parent;
+        StateGraph*                     _parent;
         osg::Drawable*                  _drawable;
         osg::ref_ptr<osg::RefMatrix>    _projection;
         osg::ref_ptr<osg::RefMatrix>    _modelview;

include/osgUtil/RenderStage

@@ -179,6 +179,8 @@ class OSGUTIL_EXPORT RenderStage : public RenderBin
 
         void copyTexture(osg::State& state);
 
+        virtual void sort();
+        
         virtual void drawPreRenderStages(osg::State& state,RenderLeaf*& previous);
 
         virtual void draw(osg::State& state,RenderLeaf*& previous);

src/osgUtil/RenderBin.cpp

@@ -346,6 +346,8 @@ void RenderBin::draw(osg::State& state,RenderLeaf*& previous)
 
 void RenderBin::drawImplementation(osg::State& state,RenderLeaf*& previous)
 {
+    // osg::notify(osg::NOTICE)<<"begin RenderBin::drawImplementation "<<className()<<" sortMode "<<getSortMode()<<std::endl;
+
     // draw first set of draw bins.
     RenderBinList::iterator rbitr;
     for(rbitr = _bins.begin();
@@ -393,7 +395,7 @@ void RenderBin::drawImplementation(osg::State& state,RenderLeaf*& previous)
         rbitr->second->draw(state,previous);
     }
 
-
+    //osg::notify(osg::NOTICE)<<"end RenderBin::drawImplementation "<<className()<<std::endl;
 }
 
 // stats

src/osgUtil/RenderLeaf.cpp

@@ -12,6 +12,7 @@
 */
 #include <osgUtil/RenderLeaf>
 #include <osgUtil/StateGraph>
+#include <osg/Notify>
 
 using namespace osg;
 using namespace osgUtil;
@@ -63,11 +64,13 @@ void RenderLeaf::render(State& state,RenderLeaf* previous)
         state.applyModelViewMatrix(_modelview.get());
 
         // apply state if required.
-         StateGraph::moveStateGraph(state,NULL,_parent->_parent);
+        StateGraph::moveStateGraph(state,NULL,_parent->_parent);
 
         state.apply(_parent->_stateset);
 
         // draw the drawable
         _drawable->draw(state);
     }
+    
+    // osg::notify(osg::NOTICE)<<"RenderLeaf "<<_drawable->getName()<<" "<<_depth<<std::endl;
 }

src/osgUtil/RenderStage.cpp

@@ -112,12 +112,47 @@ RenderStage::~RenderStage()
 
 void RenderStage::reset()
 {
-    _preRenderList.clear();
     _stageDrawnThisFrame = false;
     
     if (_renderStageLighting.valid()) _renderStageLighting->reset();
 
+    for(RenderStageList::iterator pre_itr = _preRenderList.begin();
+        pre_itr != _preRenderList.end();
+        ++pre_itr)
+    {
+        (*pre_itr)->reset();
+    }
+
     RenderBin::reset();
+
+    for(RenderStageList::iterator post_itr = _postRenderList.begin();
+        post_itr != _postRenderList.end();
+        ++post_itr)
+    {
+        (*post_itr)->reset();
+    }
+
+    _preRenderList.clear();
+    _postRenderList.clear();
+}
+
+void RenderStage::sort()
+{
+    for(RenderStageList::iterator pre_itr = _preRenderList.begin();
+        pre_itr != _preRenderList.end();
+        ++pre_itr)
+    {
+        (*pre_itr)->sort();
+    }
+
+    RenderBin::sort();
+
+    for(RenderStageList::iterator post_itr = _postRenderList.begin();
+        post_itr != _postRenderList.end();
+        ++post_itr)
+    {
+        (*post_itr)->sort();
+    }
 }
 
 void RenderStage::addPreRenderStage(RenderStage* rs)

src/osgUtil/SceneView.cpp

@@ -582,6 +582,7 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
     osg::ref_ptr<RefMatrix> proj = new osg::RefMatrix(projection);
     osg::ref_ptr<RefMatrix> mv = new osg::RefMatrix(modelview);
 
+
     // collect any occluder in the view frustum.
     if (_camera->containsOccluderNodes())
     {