source: GTP/trunk/App/Demos/Vis/CHC_revisited/StopAndWaitTraverser.cpp @ 2764

#include "StopAndWaitTraverser.h"
#include "SceneEntity.h"


namespace CHCDemo
{

using namespace std;



StopAndWaitTraverser::StopAndWaitTraverser(): RenderTraverser() 
{
}


StopAndWaitTraverser::~StopAndWaitTraverser()
{
        //DelQueries();
}


void StopAndWaitTraverser::Render()
{
        mStats.Reset();
        mRenderState->mTexturesEnabled = false;
        EnqueueNode(mBvh->GetRoot());

        //cout<<"\n***** starting frame **********\n";
        int traversed = 0;
        while (!mDistanceQueue.empty())
        {
                BvhNode *node = mDistanceQueue.top();
                mDistanceQueue.pop();
        
                //float d = mBvh->GetDistance(node);cout << d << " ";

                // interesting for the visualization, so rest and set
                node->SetVisible(false);


                if (mBvh->IsWithinViewFrustum(node))
                {
                        // if intersects near plane assume visible and don't issue test
                        if (IntersectsNearPlane(node))
                        {
                                TraverseNode(node);
                        }
                        else
                        {
                                OcclusionQuery *query = IssueOcclusionQuery(node, false);

                                int visiblePixels = query->GetQueryResult();

                                if (visiblePixels > mVisibilityThreshold)
                                {
                                        //cout<< "visible: " << visiblePixels << endl;
                                        // update node's visited flag => needed for rendering
                                        // so set it also here
                                        //node->SetLastVisited(mFrameID);
                                        //node->SetVisible(true);
                                
                                        TraverseNode(node);
                                }
                                else
                                {
                                        ++ mStats.mNumQueryCulledNodes;
                                }
                        }
                }
                else
                {
                        ++ mStats.mNumFrustumCulledNodes;
                }
                //cout << "intersect: " << intersect << " bx " << node->GetBox() << endl;
        }

        mQueryHandler.ResetQueries();
        //std::cout << "traversed: " << traversed << std::endl;
}

}