EditTransferFunction.h

#pragma once

#include<vector>
#include <string>

/* */
class CEditTransferFunction : public CDialog
{
    DECLARE_DYNAMIC(CEditTransferFunction)
    #pragma pack (push)
    #pragma pack (1)

    struct {
            BYTE m_pcName[10];
            BYTE m_bNumber;
    } m_sTransHeader;

    struct {
            int m_nPoint;
            COLORREF m_pColor;
            int m_opacity;
    } m_sTransData;

#pragma pack (pop)


private:
    int m_width, m_height;                          //width and height of histogram drawing
    int startX, startY;                             //startposition of histogram drawing in this dialog
    double xratio;                                  //ratio of m_width and max intensity value of volume
    
    std::vector<short> vec;                         //stores the x values of user specified tf points (only needed for drawing)
    std::vector<short> vecY;                        //stores the y values of user specified tf points (only needed for drawing)
    std::map<int, COLORREF> m;                      //stores intensity value with color
    std::map<int, int> mOp;                         //stores intensity value with opacity

    CPen** myPen;                                   //array of pens, for drawing the bar showing the colors of the tf
    CVisualize3DDoc* m_doc;                         //document

    unsigned short* histogram;                      //histogram of volume (x: intensity values, y: how often value x appears)
    COLORREF cf;
    TransferFunction* tf;                           // transfer function class
    enum { IDD = IDD_EDIT_TRANSFERFUNCTION };

private:
    void UpdatePens();                              //updates colors of myPen array to current tf colors
    afx_msg void OnBnClickedOk();                   //default: closes dialog
    afx_msg void OnPaint();                         //draws dialog, with histogram and transfer function
    afx_msg void OnLButtonUp( UINT nFlags,CPoint point ); //if user clicked in histogram, new transfer function point is created, tf is calculated and displayed
    afx_msg void OnBnClickedOk2();                  //resets and clears transfer function
    afx_msg void OnBnClickedSaveTf();               //saves tf to file
    afx_msg void OnBnClickedLoadTf();               //loads tf from file
    

protected:
    virtual void DoDataExchange(CDataExchange* pDX);// DDX/DDV support
    DECLARE_MESSAGE_MAP()

public:
    CEditTransferFunction(CWnd* pParent = NULL);   // standard constructor
    virtual ~CEditTransferFunction();


};

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