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//
// $Id: G4Line.cc,v 1.10 2006/06/29 18:42:22 gunter Exp $
// GEANT4 tag $Name: geant4-09-04-beta-01 $
//
// ----------------------------------------------------------------------
// GEANT 4 class source file
//
// G4Line.cc
//
// ----------------------------------------------------------------------

#include "G4Line.hh"

G4Line::G4Line (){}
G4Line::~G4Line (){}

G4Line::G4Line(const G4Line& right)
  : G4Curve(), pnt(right.pnt), dir(right.dir),
    invDir(right.invDir), v(right.v)
{
  bBox      = right.bBox;
  start     = right.start;
  end       = right.end;
  pStart    = right.pStart;
  pEnd      = right.pEnd;
  pRange    = right.pRange;
  bounded   = right.bounded;
  sameSense = right.sameSense;
}

G4Line& G4Line::operator=(const G4Line& right)
{
  if (&right == this) return *this;
  
  pnt       = right.pnt;
  dir       = right.dir;
  invDir    = right.invDir;
  v         = right.v;
  bBox      = right.bBox;
  start     = right.start;
  end       = right.end;
  pStart    = right.pStart;
  pEnd      = right.pEnd;
  pRange    = right.pRange;
  bounded   = right.bounded;
  sameSense = right.sameSense;
  
  return *this;
}

G4Curve* G4Line::Project(const G4Transform3D& tr)
{
  G4Vector3D newDir= tr*dir;
  
  if (std::abs(newDir.x())+std::abs(newDir.y()) < kCarTolerance){
  
     newDir.setX(kCarTolerance);
     newDir.setY(kCarTolerance);
  };
  
  G4Point3D newPnt= tr*pnt;
  newDir.setZ(0);
  newPnt.setZ(0);
  
  G4Line* r= new G4Line();

  // L. Broglia : terrible mistake !!!!
  //r->Init(newDir, newPnt);
  r->Init(newPnt, newDir);

  r->SetBounds(GetPStart(), GetPEnd());
  
  return r;
}

////////////////////////////////////////////////////////////////////////////

G4bool G4Line::Tangent(G4CurvePoint&, G4Vector3D& vec)
{
  if(GetSameSense())
    vec = -dir;
  else
    vec = dir;

  return true;
}