#include "OgreOcclusionCullingSceneManager.h"
#include "OgreMath.h"
#include "OgreIteratorWrappers.h"
#include "OgreRenderSystem.h"
#include "OgreCamera.h"
#include "OgreHardwareOcclusionQuery.h"
//#include "OgreWireBoundingBox.h"
#include "OgreSolidHalfBoundingBox.h"

#include <windows.h>

namespace Ogre {
	
	//-----------------------------------------------------------------------
	OcclusionCullingSceneManager::OcclusionCullingSceneManager()
	{
		mOcclusionCullingSceneTraverser = new OcclusionCullingSceneTraverser(this, mDestRenderSystem);
	}
	//-----------------------------------------------------------------------
	OcclusionCullingSceneManager::~OcclusionCullingSceneManager()
	{
		delete mOcclusionCullingSceneTraverser;
	}
	//-----------------------------------------------------------------------
	void OcclusionCullingSceneManager::_findVisibleObjects( Camera* cam, bool onlyShadowCasters )
	{
		// empty because we have to find objects in _renderVisibleObjects
	}
	//-----------------------------------------------------------------------
	void OcclusionCullingSceneManager::_renderVisibleObjects( void )
	{
			//-- render background
		clearSpecialCaseRenderQueues();
		addSpecialCaseRenderQueue(RENDER_QUEUE_BACKGROUND);
		addSpecialCaseRenderQueue(RENDER_QUEUE_SKIES_EARLY);
	
		setSpecialCaseRenderQueueMode(SceneManager::SCRQM_INCLUDE);
		SceneManager::_renderVisibleObjects( );
		_deleteRenderedQueueGroups();

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

		mOcclusionCullingSceneTraverser->setSceneRoot(mSceneRoot);
		mOcclusionCullingSceneTraverser->renderScene(mCameraInProgress);

		_deleteRenderedQueueGroups();

		//-- render overlay
		clearSpecialCaseRenderQueues();
		SceneManager::_renderVisibleObjects( );
	
		clearSpecialCaseRenderQueues();
	}
	//-----------------------------------------------------------------------
	/*void OcclusionCullingSceneManager::renderZPass()
	{
		traverseNode(mSceneRoot);
	}*/
	//-----------------------------------------------------------------------
	void OcclusionCullingSceneManager::_updateSceneGraph( Camera* cam )
	{
		mOcclusionCullingSceneTraverser->setNumSceneNodes((int)mSceneNodes.size());
		mOcclusionCullingSceneTraverser->setRenderSystem(mDestRenderSystem);
		
		//mOcclusionCullingSceneTraverser->setNumQueries((int)mSceneNodes.size());
        //mOcclusionCullingSceneTraverser->preprocess();
		
		SceneManager::_updateSceneGraph(cam);
	}
	//-----------------------------------------------------------------------
	bool OcclusionCullingSceneManager::setOption( const String & key, const void * val )
	{
		mOcclusionCullingSceneTraverser->setOption(key, val);
			
		return SceneManager::setOption( key, val );
	}
	//-----------------------------------------------------------------------
	bool OcclusionCullingSceneManager::getOption( const String & key, void *val )
	{
		mOcclusionCullingSceneTraverser->getOption(key, val);
		
		return SceneManager::getOption( key, val );
	}
	//-----------------------------------------------------------------------
	bool OcclusionCullingSceneManager::getOptionValues( const String & key, StringVector  &refValueList )
	{
		return SceneManager::getOptionValues( key, refValueList );
	}
	//-----------------------------------------------------------------------
	bool OcclusionCullingSceneManager::getOptionKeys( StringVector & refKeys )
	{
		SceneManager::getOptionKeys( refKeys );

		mOcclusionCullingSceneTraverser->getOptionKeys( refKeys );

		return true;
	}
}