#include "FrustumCullingManager.h"

namespace GtpVisibility {

//-----------------------------------------------------------------------
FrustumCullingManager::FrustumCullingManager(HierarchyInterface *hierarchyInterface):
CullingManager(hierarchyInterface)
{
}
//-----------------------------------------------------------------------
void FrustumCullingManager::RenderScene()
{
	mNumFrustumCulledNodes = mNumQueryCulledNodes = 0;

	while(!mHierarchyInterface->GetQueue()->empty())
	{
		HierarchyNode *node = mHierarchyInterface->GetQueue()->top();
		mHierarchyInterface->GetQueue()->pop();
		
		// interesting for visualization purpose
		mHierarchyInterface->SetNodeVisible(node, false);
		mHierarchyInterface->SetLastVisited(node, mHierarchyInterface->GetFrameId());

		bool intersects = false;

		if(mHierarchyInterface->CheckFrustumVisible(node, intersects))
		{
			mNumFrustumCulledNodes ++;
			continue;
		}
		
		//if intersects near plane => skip occlusion query because wrong results possible
		if(intersects)
		{
            mHierarchyInterface->SetNodeVisible(node, true);
			mHierarchyInterface->TraverseNode(node);
			continue;
		}

		mHierarchyInterface->TraverseNode(node);
	}
}

} // namespace GtpVisibility