//----------------------------------------------------------------------------
//  EgalTech 2013-2014
//----------------------------------------------------------------------------
// File : DistPointLine.h      Data : 02.01.14          Versione : 1.5a1
// Contenuto : Dichiarazione della classe distanza punto da linea/segmento.
//
//
//
// Modifiche : 30.12.12 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

#pragma once

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


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

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

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

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

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