source: trunk/VUT/Ogre/src/OgreVisibilitySceneManager.cpp @ 111

#include <OgreMath.h>
#include <OgreIteratorWrappers.h>
#include <OgreRenderSystem.h>
#include <OgreCamera.h>
#include "OgreVisibilitySceneManager.h"
#include "OgreSceneNodeHierarchyInterface.h"
#include "OgreVisibilityOptionsManager.h"


namespace Ogre {

//-----------------------------------------------------------------------
VisibilitySceneManager::VisibilitySceneManager(GtpVisibility::VisibilityManager *visManager)
:mVisibilityManager(visManager), mUseVisibilityCulling(true), mShowVisualization(false)
{
        mHierarchyInterface = 
                new SceneNodeHierarchyInterface(this, mDestRenderSystem);
}
//-----------------------------------------------------------------------
VisibilitySceneManager::~VisibilitySceneManager()
{
        delete mHierarchyInterface;
}
//-----------------------------------------------------------------------
void VisibilitySceneManager::_findVisibleObjects(Camera* cam, bool onlyShadowCasters)
{
        mHierarchyInterface->SetOnlyShadowCasters(onlyShadowCasters);
        // does nothing if hierarchical culling is used =>
        // we interleave identification and rendering of objects 
        // in _renderVisibibleObjects
        if (!mUseVisibilityCulling)
        {
                SceneManager::_findVisibleObjects(cam, onlyShadowCasters);
                return; 
        }
}
//-----------------------------------------------------------------------
void VisibilitySceneManager::_renderVisibleObjects()
{
        // two cameras (one for culling, one for rendering)
        mHierarchyInterface->InitFrame(mSceneRoot, mCameraInProgress);

        // call initframe to reset culling manager stats
        mVisibilityManager->GetCullingManager()->InitFrame();

        // standard terrain scenemanager rendering without hierarchical culling
        if (!mUseVisibilityCulling || mShowVisualization)
        {       
                SceneManager::_renderVisibleObjects();
                return;
        } 
        
        //-- hierarchical culling
        // the objects of different layers (e.g., background, scene, 
        // overlay) must be identified and rendered one after another

        //-- render background
        clearSpecialCaseRenderQueues();
        addSpecialCaseRenderQueue(RENDER_QUEUE_BACKGROUND);
        addSpecialCaseRenderQueue(RENDER_QUEUE_SKIES_EARLY);

        setSpecialCaseRenderQueueMode(SceneManager::SCRQM_INCLUDE);
        SceneManager::_renderVisibleObjects();

#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        _deleteRenderedQueueGroups();
#endif

        //-- render visible objects (i.e., all but overlay)
        clearSpecialCaseRenderQueues();
        addSpecialCaseRenderQueue(RENDER_QUEUE_OVERLAY);
        setSpecialCaseRenderQueueMode(SceneManager::SCRQM_EXCLUDE);


        /** 
        * the hierarchical culling algorithm
        **/
        mVisibilityManager->ApplyVisibilityCulling();


#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        _deleteRenderedQueueGroups();
#endif

        //-- render overlay
        clearSpecialCaseRenderQueues();
        SceneManager::_renderVisibleObjects();

        //WriteLog(); // write out stats
}
//-----------------------------------------------------------------------
void VisibilitySceneManager::_updateSceneGraph(Camera* cam)
{
        mVisibilityManager->GetCullingManager()->SetHierarchyInterface(mHierarchyInterface);
        mHierarchyInterface->SetRenderSystem(mDestRenderSystem);
        
        SceneManager::_updateSceneGraph(cam);
}
//-----------------------------------------------------------------------
bool VisibilitySceneManager::setOption(const String & key, const void * val)
{
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                setOption(key, val) || SceneManager::setOption(key, val);
}
//-----------------------------------------------------------------------
bool VisibilitySceneManager::getOption(const String & key, void *val)
{
        if (key == "NumHierarchyNodes")
        {
                * static_cast<unsigned int *>(val) = (unsigned int)mSceneNodes.size();
                return true;
        }
        
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                getOption(key, val) && SceneManager::getOption(key, val);
}
//-----------------------------------------------------------------------
bool VisibilitySceneManager::getOptionValues(const String & key, StringVector  &refValueList)
{
        return SceneManager::getOptionValues(key, refValueList);
}
//-----------------------------------------------------------------------
bool VisibilitySceneManager::getOptionKeys(StringVector & refKeys)
{
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                getOptionKeys(refKeys) || SceneManager::getOptionKeys(refKeys);
}
//-----------------------------------------------------------------------
void VisibilitySceneManager::setVisibilityManager(GtpVisibility::VisibilityManager *visManager)
{
        mVisibilityManager = visManager;
}
//-----------------------------------------------------------------------
GtpVisibility::VisibilityManager *VisibilitySceneManager::getVisibilityManager( void )
{
        return mVisibilityManager;
}

} // namespace Ogre