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

#pragma once

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


//----------------------------------------------------------------------------
enum MdPCiType { MDPCI_NORMAL, MDPCI_START_CONT, MDPCI_END_CONT} ;
struct MinDistPCInfo {
   MdPCiType nFlag ;
   double  dPar ;
   Point3d ptQ ;
   MinDistPCInfo( void)
      : nFlag( MDPCI_NORMAL), dPar( 0), ptQ( 0, 0, 0) {}
   MinDistPCInfo( MdPCiType nF, double dP, Point3d pT) 
      : nFlag( nF), dPar( dP), ptQ( pT) {}
} ;
typedef std::vector<MinDistPCInfo>  MDPCIVECTOR ;   // vettore di MinDistPCInfo

//----------------------------------------------------------------------------
enum MdSide { MDS_LEFT = -1, MDS_ON = 0, MDS_RIGHT = +1} ;

//-----------------------------------------------------------------------------
class DistPointCurve
{
   public :
      EGK_EXPORT DistPointCurve( const Point3d& ptP, const ICurve& Curve, bool bIsSegment = true) ;
      // Il flag bIsSegment vale solo per linee.

   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 (int) m_Info.size() ; }
      EGK_EXPORT bool GetMinDistPoint( int nInd, Point3d& ptMinDist, int& nFlag) const ;
      EGK_EXPORT bool GetMinDistPoint( double dNearParam, Point3d& ptMinDist, int& nFlag) const ;
      EGK_EXPORT bool GetParamAtMinDistPoint( int nInd, double& dParam, int& nFlag) const ;
      EGK_EXPORT bool GetParamAtMinDistPoint( double dNearParam, double& dParam, int& nFlag) const ;
      EGK_EXPORT bool GetSideAtMinDistPoint( int nInd, const Vector3d& vtN, int& nSide) const ;
      EGK_EXPORT bool GetSideAtMinDistPoint( double dNearParam, const Vector3d& vtN, int& nSide) const ;
      EGK_EXPORT bool GetMinDistInfo( int nInd, MinDistPCInfo& aInfo) const ;

   private :
      DistPointCurve( void) ;
      void LineCalculate( const Point3d& ptP, const ICurve& Curve, bool bIsSegment) ;
      void ArcCalculate( const Point3d& ptP, const ICurve& Curve) ;
      void CrvBezierCalculate( const Point3d& ptP, const ICurve& Curve) ;
      void CrvCompositeCalculate( const Point3d& ptP, const ICurve& Curve) ;

   private :
      double        m_dDist ;
      MDPCIVECTOR   m_Info ;
      Point3d       m_ptP ;
      const ICurve* m_pCurve ;
} ;