BVDistRot.h

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

#ifndef __BV_DIST_ROT_H
#define __BV_DIST_ROT_H

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

#include <esg/Export>

/*
 * Class for general bounding volumes.
 * See DistRot for more details.
 */

namespace esg {

class OGSCENE_EXPORT BVDistRot : public DistRot {
protected:
    Geometry * _pTwin;

public:
    BVDistRot (const Geometry& g,
               const Matrix4&  multi,
               double          sr = 1.0)
        : DistRot(sr)
    {
        _pTwin = (Geometry*) g.clone(&multi);
    }
    
    virtual ~BVDistRot () { if (_pTwin) delete _pTwin; }
    
    virtual double distance (Geometry& g /* static geometry   */,
                             double    d /* minimal distance  */,
                             Vector3*  v /* approx. direction */)
    {
        if (!_pTwin) return MAXFLOAT;
        double dd = g.distance(*_pTwin, v) / _scaleRatio;
        return ((dd >= d) ? MAXFLOAT : dd);
    }

    /*
     * 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& g /* static geometry  */,
                             Vector3*  v /* approx. direction */)
    {
        return ((_pTwin) ? g.separation(*_pTwin, v) : true);
    }
};

}; // namespace

#endif // __BV_DIST_ROT_H

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