Histogram.h

#ifndef _HISTOGRAM_
#define _HISTOGRAM_

#include <glui.h>
#include <vector>

#include "LifeVariables.h"
//#include "OrthographicCamera.h"
#include "GuiComponent.h"
#include "TxFunction.h"


#define HISTOGRAM_VALUE_RANGE 4096
#define HISTOGRAM_VALUE_RANGE_FLOAT HISTOGRAM_VALUE_RANGE.0f

#define HISTOGRAM_VGRID_SIZE 256



using namespace std;

static unsigned int occurrenceArray[HISTOGRAM_VALUE_RANGE];


class Histogram: public GuiComponent {
    private:
        bool initialised;

        void addTxPoint();

        void deleteTxPoint();

        TxFunction *txFunction;
        
        float oneAlphaPercent;

    public:

        

        OrthographicCamera *camera;

        TxPoint *grabbedPoint;       

        //ViewPort *viewPort;

        Histogram();
        
        ~Histogram() {
            delete txFunction;
            delete grabbedPoint;
        };

        void update(unsigned short *data, unsigned int &size);
        

        void render(int x, int y, int width, int height);


        void onLeftMouseClick(int x, int y);
        

        bool onRightMouseClick(int x, int y);
        
        void onMouseDrag(int x, int y);
        
        void getColorByDensity(unsigned short &density, 
                               float &red, float &green, float &blue, float &alpha);

        bool isInitialised() { 
            return initialised; 
        };

        bool removeControlPoint();

        
        void getVoxelColorByDensity(float density,                                   
                                    float &red, float &green, float &blue);

        void getLevoyVoxelColor(float density,                                   
                                    float &red, float &green, float &blue, float gradient);

        void getSolidVoxelColorByDensity(float density,                                   
                                    float &red, float &green, float &blue);

};

#endif

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