source: GTP/trunk/Lib/Vis/Preprocessing/src/RenderSimulator.h @ 2176

#ifndef _RenderSimulator_h__
#define _RenderSimulator_h__

#include "common.h"
#include "Statistics.h"
#include "Renderer.h"

namespace GtpVisibilityPreprocessor {

class SimulationStatistics: public StatisticsBase
{
public:
        /// view cell with the biggest "cost"
        float maxCost;
        /// view cell with the minimal "cost"
    float minCost;
        /// average render time
        float avgRenderTime;
        /// average render time with the overhead when crossing view cells
        float avgRtWithoutOverhead;
  
        //-- options counting only valid view cells

        /// view cell with the biggest "cost"
        float validMaxCost;
        /// view cell with the minimal "cost"
    float validMinCost;
        /// average render time
        float validAvgRenderTime;
        /// average render time with the overhead when crossing view cells
        float validAvgRtWithoutOverhead;

        void Reset() 
        {
                maxCost = 0;
                minCost = 999999;
                avgRenderTime = 0;
                avgRtWithoutOverhead = 0;

                validMaxCost = 0;
                validMinCost = 999999;
                validAvgRenderTime = 0;
                validAvgRtWithoutOverhead = 0;
        }

        void Print(std::ostream &app) const;

        friend std::ostream &operator<<(std::ostream &s, const SimulationStatistics &stat) 
        {
                stat.Print(s);
                return s;
        }  

        SimulationStatistics()
        {
                Reset();
        }
};

/** Simulated rendering using a simple render heuristics. Used to evaluate the 
        quality of the view cell partition. Evaluates some statistics of the simulation.
*/
class RenderSimulator: public Renderer
{

public:
        RenderSimulator(ViewCellsManager *viewCellsManager);
        /** Constructor taking the estimated render cost, 
                the view cell overhead,
                and the average move speed of the player into account.
        */
        RenderSimulator(ViewCellsManager *viewCellsManager, 
                                        float objRendercost, 
                                        float vcOverhead, 
                                        float moveSpeed);

        /** Sets estimated render time for a single object in the PVS.
        */
        void SetObjectRenderCost(const float objRenderCost);

        /** Contant overhead for crossing a view cell border.
        */
        void SetVcOverhead(const float vcOverhead);

        /** Average move speed of the player during rendering.
        */
        void SetMoveSpeed(const float moveSpeed);

        /** Returns simulation statistics.
        */
        void GetStatistics(SimulationStatistics &simStats) const;

        /** Simulates rendering of the scene.
        */
        bool RenderScene();

        /** If only valid view space should be rendered.
        */
        void SetRenderOnlyValid(const bool onlyValid);

protected:

        /** Probability for crossing one view cell.
        */
        float GetCrossVcProbability() const;

        /// render time for single object of the PVS
        float mObjRenderCost;
        
        /// const overhead for crossing a view cell border
        float mVcOverhead;

        /// move speed of player
        float mMoveSpeed;

        /// Simulation statistics
        SimulationStatistics mSimulationStatistics;
};

}

#endif // RenderSimulator