source: GTP/trunk/Lib/Vis/Preprocessing/src/RandomViewCellsHandler.h @ 2598

#ifndef _RandomViewCellsHandler_H__
#define _RandomViewCellsHandler_H__

#include "Containers.h"
#include "SimpleRay.h"


namespace GtpVisibilityPreprocessor {

class ViewCell;
class ViewCellsManager;

typedef pair<ViewCell *, SimpleRayContainer> ViewCellPoints;
typedef vector<ViewCellPoints *> ViewCellPointsList;


/** This class functions define a system to generate, export and import a list
        of random view cells and valid view points.
*/

class RandomViewCellsHandler
{
        //friend class ViewCellsManager;

public:

        RandomViewCellsHandler(ViewCellsManager *vcManager);
        ~RandomViewCellsHandler();

        /** Exports list of random view cells.
        */
        bool ExportRandomViewCells(const string &filename);
        /** Returns the stored list of view cells and view points.
        */
        ViewCellPointsList *GetViewCellPointsList();
        /** Load list of view cells using the current list of view points.
        */
        bool ImportViewCellsList(const string &filename);


protected:

        bool GenerateRandomViewCells(ViewCellContainer &viewCells, 
                                                                 const int numViewCells);

        bool GenerateRandomViewCells(ViewCellPointsList &viewCells,
                                                                 const int nViewCells,
                                                                 const int nViewPoints);


        /** Generates a list of random view points in a view cells.
                @param viewCell the view cells
                @param numViewPoints the number of view points
                @param viewPoints returns view points in this container.
        */
        bool GenerateViewPoints(ViewCell *viewCell, 
                                                        const int numViewPoints,
                                                        SimpleRayContainer &viewPoints);

        /** Load list of view cells and view points.
        */
        bool ImportViewCellsList(const string &filename, 
                                                         vector<ViewCellPoints *> &viewCells);

        /** Exports list of random view cells and valid view points.
        */
        bool ExportRandomViewCells(const string &filename,
                                                           const vector<ViewCellPoints *> &viewCells);

        /** Generates a new valid random view point.
        */
        bool GenerateViewPoint(ViewCell *viewCell, SimpleRay &ray);

        /** Returns true if this view cell is in valid view space.
        */
        bool IsValidViewSpace(ViewCell *vc);

        
protected:

        ViewCellsManager *mViewCellsManager;

        ViewCellPointsList mViewCellPointsList;
};

}


#endif