OSGDVRClipGeometry.h

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#ifndef _OSGDVRCLIPGEOMETRY_H_
#define _OSGDVRCLIPGEOMETRY_H_
#ifdef __sgi
#pragma once
#endif

#include <OSGConfig.h>
#include <OSGGeometry.h>
#include <OSGPlane.h>

#include <OSGDVRClipGeometryBase.h>
#include <OSGDVRVertex.h>
#include <OSGDVRTriangle.h>

OSG_BEGIN_NAMESPACE

class OSG_SYSTEMLIB_DLLMAPPING DVRClipGeometry : public DVRClipGeometryBase
{
  private:

    typedef DVRClipGeometryBase Inherited;

    /*==========================  PUBLIC  =================================*/

  public:

    /*---------------------------------------------------------------------*/
    virtual void changed(BitVector  whichField, 
                         UInt32     origin    );

    /*---------------------------------------------------------------------*/
    virtual void dump(      UInt32     uiIndent = 0, 
                      const BitVector  bvFlags  = 0) const;

    /*---------------------------------------------------------------------*/


    void initialize            (const Matrix &volumeToWorld                );

    void resetLocalData        (      void                                 );

    void setReferencePlane     (const Plane  &referencePlane               );
  

    bool setNumAddPerVertexAttr(      UInt32  additionalPerVertexAttributes);
  
    void computeSeedVertices   (      void                                 );
    
    const DVRTriangleList &getContours(      float dist2RefPlane, 
                                             bool positiveWinding, 
                                       const Vec3f &sliceNormal);

    /*=========================  PROTECTED  ===============================*/

  protected:

    /*---------------------------------------------------------------------*/

    bool                       initialized;

    GeometryPtr                geometry;

    std::vector<DVRVertex>     _mfVertices;

    std::vector<DVRTriangle>   _mfTriangles;

    Matrix                     toVolumeSpace;

    DVRTriangle              **activeTriangles;
    UInt32                     activeTrianglesCount;
    UInt32                     maxActiveTrianglesCount;

    DVRVertex                **seedVertices;
    UInt32                     seedVerticesCount;
    UInt32                     maxSeedVerticesCount;

    DVRTriangleList            contours;
  
    /*---------------------------------------------------------------------*/
    DVRClipGeometry(void);
    DVRClipGeometry(const DVRClipGeometry &source);

    /*---------------------------------------------------------------------*/
    virtual ~DVRClipGeometry(void); 

    /*---------------------------------------------------------------------*/


    Int32 insertVertex (Int32      idx   );

    bool isLocalMinimum(DVRVertex &vertex);

    /*---------------------------------------------------------------------*/


    bool isCut         (      DVRTriangle *tri, 
                              Real32       dist2RefPlane, 
                              DVRVertex   *switchedVertices[3]);

    bool isBehindPlane (      DVRTriangle &tri, 
                              Real32       dist2RefPlane      );

    void renderTriangle(const DVRTriangle &tri                ) const;

    /*---------------------------------------------------------------------*/

    bool buildTriangledGeometry(void);

    /*---------------------------------------------------------------------*/

    void buildContours        (      Real32       dist2RefPlane, 
                                     bool         positiveWinding, 
                               const Vec3f       &sliceNormal    );
    
    void linkContour          (      DVRTriangle *startTriangle,
                                     Real32       dist2RefPlane,
                               const Vec3f       &viewDir, 
                                     bool         positiveWinding);
    
    void updateActiveTriangles(      Real32       dist2RefPlane, 
                               const Vec3f       &sliceNormal    );
    
    void addActiveTriangle    (      DVRTriangle *tri            );

    void addNewActiveTriangles(      DVRVertex   *vertex,
                                     Real32       dist2RefPlane  );
    
    Pnt3f interpolate         (      DVRTriangle *tri, 
                                     Int32        v1, 
                                     Int32        v2, 
                                     Real32       dist2RefPlane  );
    
    /*==========================  PRIVATE  ================================*/

  private:

    friend class FieldContainer;
    friend class DVRClipGeometryBase;

    static void initMethod(void);

    // prohibit default functions (move to 'public' if you need one)
    void operator =(const DVRClipGeometry &source);
};

typedef DVRClipGeometry *DVRClipGeometryP;

OSG_END_NAMESPACE

#include <OSGDVRClipGeometryBase.inl>
#include <OSGDVRClipGeometry.inl>

#define OSGDVRCLIPGEOMETRY_HEADER_CVSID "@(#)$Id: $"

#endif /* _OSGDVRCLIPGEOMETRY_H_ */

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