CScanner.h

#ifndef __CSCANNER_H__
#define __CSCANNER_H__

#include "utilityfuncs.h"

class CScanner  
{
public:

    int direction;

    CScanner()   { _xRes = 0; _yRes = 0; _aView = 0; _bRaySet = false; direction = 0; }
    ~CScanner()  { Shutdown(); }

    Init();
    Shutdown() { delete[] _aView; _aView = 0; }
    void SetProjEye(sPoint3f eye);

    void ScanVolume();
    void GenerateComposite();

    void GenerateXRAY();

    void GenerateMIP();

    void GenerateFirstHit();

    bool GetIntersectionPoints(sPoint3f *pBeginCoord, sPoint3f *pEndCoord, 
                               sPoint3f eye,          sVector3f ray);
    void GetXYIntersectionPoints(sPoint3f   eye,sVector3f ray);
    void GetYZIntersectionPoints(sPoint3f   eye,sVector3f ray);
    void GetXZIntersectionPoints(sPoint3f   eye,sVector3f ray);

    void  SampleAlongRay(sPoint3f beginCoord, sPoint3f endCoord,sRGBA * pRGBA);

    float SampleXRAYAlongRay(sPoint3f beginCoord, sPoint3f endCoord);

    float SampleMIPAlongRay(sPoint3f beginCoord, sPoint3f endCoord);

    void  SampleFirstHitAlongRay(sPoint3f beginCoord, sPoint3f endCoord, sRGBA *pRGBA);
    void  SampleFHAlongRay(sPoint3f beginCoord, sPoint3f endCoord, sRGBA *pRGBA);

    float GetDiffuseValue(sPoint3f coordinate);
    float *GetView() { return (float *)_aView;}

    unsigned GetTexWidth() { return (unsigned)_xRes; }
    unsigned GetTexHeight(){ return (unsigned)_yRes; }
    unsigned long GetTexSize() { return _sizeProjection; }

private:

    sPoint3f    _eye;
    sPoint3f    _projEye;
    sVector3f   _ray;
    float       _xRes, _yRes;
    float       _fStepSize, _scanRange;
    sPoint3f    _range;  // initialized to 1/2 width, height, depth of volume
    sVector3f   _xPlane, _yPlain, _zPlain;
    CVector3f   _aIntersectionPoints[2];

    sRGBA     *  _aView;

    short         _wProjection, _hProjection;
    unsigned long _sizeProjection;
    unsigned      _iXCount;
    GLfloat       _yTheta;
    GLfloat       cos_theta, sin_theta,cos_x_theta, sin_x_theta, sin_alpha, cos_alpha;
    bool          _bRaySet;
};

#endif /* __CSCANNER_H__ */

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