FDH14DistRot.h

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/* $Id: FDH14DistRot.h,v 1.4 2002/11/05 14:31:15 anonymous Exp $ */

#ifndef __FDH14_DIST_ROT
#define __FDH14_DIST_ROT

#include <esg/geometry/includes.h>
#include <esg/spacesorting/DistRot.h>

/*
 * Distance between rotated FDH14 and another bounding volume.
 * When second volume is also FDH14 then very efficient algorithm is
 * used, otherwise a little bit slower but also very good algorithm 
 * is employed.
 *
 * See DistRot for more details.
 */

namespace esg {

class OGSCENE_EXPORT FDH14DistRot : public DistRot {
protected:
    float          * _orig;     // original FDH values
    FDH14::RotInfo * _pRotInfo; // precomputed rotation info.    
    int              _set;      // which new values are really set
    float          * _transf;   // transformed FDH values

protected:
    double _distance   (const FDH14&,    double, Vector3*);
    double _distance   (const Geometry&, double, Vector3*);
    bool   _separation (const FDH14&);
    bool   _separation (const Geometry&);
    
public:
    FDH14DistRot (float* /* fdh values */, FDH14::RotInfo*, double sr = 1.0);

    virtual ~FDH14DistRot () { delete [] _transf; }
    
    virtual double distance (Geometry&, double, Vector3*);
    
    /*
     * Output separation diraction is valid only for objects that are
     * penetrated and represents the approximately shortest way to
     * get them separated.
     */
    virtual bool separation (Geometry&, Vector3*);
};

}; // namespace

#endif // __FDH14_DIST_ROT

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