RTVolumeRendering/Source/TransferTexture.h

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#ifndef TRANSFERTEXTURE_H
#define TRANSFERTEXTURE_H

#include <gl/glew.h>
#include <string>
#include <vector>
#include "Color4.h"

struct PlotPoint
{
        float value; 
        unsigned char dataValue; 
};

class TransferTexture
{
public:
        
        TransferTexture();
        
        ~TransferTexture();
        
        bool Load(const char *name);
        
        struct ControlPoint
        {
                Color4f color; 
                int value; 
        };
        
        bool CreateFunction(const std::vector<PlotPoint> &red,
                                                const std::vector<PlotPoint> &green,
                                                const std::vector<PlotPoint> &blue,
                                                const std::vector<PlotPoint> &alpha);
        
        void Bind(int unit = 0);
        
        void UnBind();
        
        GLuint GetTextureID() const { return tex; }
        
protected:
        
        bool Interpolate(const std::vector<PlotPoint> &plot, float *color, int stride);
        
        GLuint tex;
        int boundUnit;
};

#endif

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