#include "OgreOcclusionCullingSceneManager.h"
#include "OgreMath.h"
#include "OgreIteratorWrappers.h"
#include <windows.h>

namespace Ogre {
	
	//-----------------------------------------------------------------------
	OcclusionCullingSceneManager::OcclusionCullingSceneManager(): 
	mFrameID(1)
	{		
	}

	//-----------------------------------------------------------------------
	void OcclusionCullingSceneManager::_renderVisibleObjects(void)
	{
		SceneManager::_renderVisibleObjects();
		//mDistanceQueue.push(mSceneRoot);
		//Preprocess();
		//printf("registered my plugin!!\n");
		//MessageBox( NULL, "myplugin", "this is my plugin", MB_OK | MB_ICONERROR | MB_TASKMODAL);
		renderCullFrustum();

		//mFrameID ++;
		//ResetQueries();
	}

	//-----------------------------------------------------------------------
	void OcclusionCullingSceneManager::renderCullFrustum()
	{
		//RenderQueue::QueueGroupIterator queueIt = getRenderQueue()->_getQueueGroupIterator();

		 //while (queueIt.hasMoreElements())
		if(! mDistanceQueue.empty())
		{
			SceneNode *node = mDistanceQueue.top();
			mDistanceQueue.pop();

			 //walkTree(

		}
			 /*
			HierarchyNode *node = mDistanceQueue.top();
			mDistanceQueue.pop();
	
			// interesting for the visualization, so rest and set
			node->SetVisible(false);
			
			// We don't need to know about near plane intersection 
			// for frustum culling only, but we have to pass a parameter
			bool intersectsNearplane;
			if(InsideViewFrustum(node, intersectsNearplane))
			{
				// update node's visited flag => needed for rendering
				// so set it also here
				node->SetLastVisited(mFrameID);
				node->SetVisible(true);
				TraverseNode(node);
			}
		}*/
	}

	//-----------------------------------------------------------------------
	void OcclusionCullingSceneManager::walkTree(SceneNode *node)
	{
		if(node->numChildren() > 0)
		{
			//node->Render();
		}
		else // internal node: add children to priority queue for further processing
		{
			Node::ChildNodeIterator it = node->getChildIterator();
		
			while (it.hasMoreElements())
			{
				SceneNode* sceneChild = static_cast<SceneNode*>(it.getNext());
				//getRenderQueue()->addRenderable(sceneChild);
                mDistanceQueue.push(sceneChild);
			}
		}
	}
}