//----------------------------------------------------------------------------
//  EgalTech 2013-2024
//----------------------------------------------------------------------------
// File : EGkDistPointLine.h      Data : 20.05.24          Versione : 2.6e5
// Contenuto : Dichiarazione della classe distanza punto da linea/segmento.
//
//
//
// Modifiche : 30.12.12 DS Creazione modulo.
//             20.05.24 DS Pubblicato in Include.
//
//----------------------------------------------------------------------------

#pragma once

#include "/EgtDev/Include/EGkPoint3d.h"
#include "/EgtDev/Include/EGkCurveLine.h"

//----------------------- Macro per import/export ----------------------------
#undef EGK_EXPORT
#if defined( I_AM_EGK)            // da definirsi solo nella DLL
   #define EGK_EXPORT __declspec( dllexport)
#else
   #define EGK_EXPORT __declspec( dllimport)
#endif


//-----------------------------------------------------------------------------
class DistPointLine
{
   friend class DistPointCurve ;

   public :
      EGK_EXPORT DistPointLine( const Point3d& ptP,
                                const ICurveLine& crvLine, bool bIsSegment = true) ;
      EGK_EXPORT DistPointLine( const Point3d& ptP,
                                const Point3d& ptIni, const Point3d& ptFin, bool bIsSegment = true) ;
      EGK_EXPORT DistPointLine( const Point3d& ptP,
                                const Point3d& ptIni, const Vector3d& vtDir, double dLen, bool bIsSegment = true) ;

   public :
      EGK_EXPORT bool GetSqDist( double& dSqDist) const ;
      EGK_EXPORT bool GetDist( double& dDist) const ;
      EGK_EXPORT bool IsEpsilon( double dTol) const
                         { double dSqDist ; return ( GetSqDist( dSqDist) && ( dSqDist < SQ_EPS_ZERO || dSqDist < dTol * dTol)) ; }
      EGK_EXPORT bool IsSmall( void) const
                         { return IsEpsilon( EPS_SMALL) ; }
      EGK_EXPORT bool IsZero( void) const
                         { return IsEpsilon( EPS_ZERO) ; }
      EGK_EXPORT int  GetNbrMinDist( void) const
                         { return (( m_dSqDist < 0) ? 0 : 1) ; }
      EGK_EXPORT bool GetMinDistPoint( Point3d& ptMinDist) const ;
      EGK_EXPORT bool GetParamAtMinDistPoint( double& dParam) const ;

   private :
      void Calculate( const Point3d& ptP,
                      const Point3d& ptIni, const Vector3d& vtDir, double dLen, bool bIsSegment) ;

   private :
      double  m_dSqDist ;
      mutable double  m_dDist ;
      double  m_dParam ;
      Point3d m_ptMinDist ;
} ;