D:/C++/Visualisierung/vislab/src/TransferFunc.h

#pragma once

#ifndef TRANSFERFUNC_H
#define TRANSFERFUNC_H

#include "Volume.h"
#include "TfpList.h"
//#include "ChoseColor.h"
#include "ColorChooser.h"
#include "Shaders.h"
#include "common.h"

class TransferFunc
{
public:
        TransferFunc(const float _x, const float _y, const float _width, const float _height, const int _numberBars, 
                Volume *_volume, ColorChooser *_chooserColor, Shaders *_shader);
        ~TransferFunc();

        void setPointList(TfpList *_pointList);
        TfpList* getListPoints();
        void render();
        bool isTFClicked(const float xWorld, const float yWorld);
        void handleClick(const int button, const int state, const float xWorld, const float yWorld);
        void updateTFTextureData();

protected:
        void initHistogram();
        void drawHistogram();
        void drawTfpPolynom();
        void drawTfPoint(TfPoint* prePoint, TfPoint* point);
        void drawDensityDistribution();

private:
        float width;
        float height;
        float x;
        float y;

        Volume *volume;
        TfpList *pointList;
        ColorChooser *chooserColor;
        Shaders *shader;
        
        int numberBars;
        int *histo;
        float *logHistHeights;
        int maxHisto;
        bool pointDragged;

        unsigned char* transferTextureData;
        GLuint transferTexture;
                
        
};
#endif TRANSFERFUNC_H

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