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// $Id: G4ErrorCylSurfaceTarget.hh,v 1.1 2007/05/16 12:50:52 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
// --------------------------------------------------------------------
//      GEANT 4 class header file 
// --------------------------------------------------------------------
//
// Class Description:
//
// G4ErrorTarget class: limits step when track reaches a cylindrical surface.

// History:
// - Created. P. Arce, September 2004
// --------------------------------------------------------------------

#ifndef G4ErrorCylSurfaceTarget_hh
#define G4ErrorCylSurfaceTarget_hh

#include "globals.hh"
#include "G4ErrorSurfaceTarget.hh"
#include "G4ThreeVector.hh"
#include "G4RotationMatrix.hh"
#include "G4AffineTransform.hh"
#include "G4Plane3D.hh"

class G4ErrorCylSurfaceTarget : public G4ErrorSurfaceTarget
{
  public:  // with description

    G4ErrorCylSurfaceTarget( const G4double& radius,
                             const G4ThreeVector& trans=G4ThreeVector(),
                             const G4RotationMatrix& rotm=G4RotationMatrix() );
      // Constructs cylindrical surface by radius, translation and rotation

    G4ErrorCylSurfaceTarget( const G4double& radius,
                             const G4AffineTransform& trans );
      // Constructs cylindrical surface by radius and affine transformation

    ~G4ErrorCylSurfaceTarget();

    virtual G4ThreeVector IntersectLocal( const G4ThreeVector& point,
                                          const G4ThreeVector& direc ) const;
      // Intersects the cylindrical surface with the line in local (cylinder)
      // coordinates, given by point and direction

    virtual G4double GetDistanceFromPoint( const G4ThreeVector& point,
                                           const G4ThreeVector& direc ) const;
      // Distance from a point to the cylindrical surface in a given direction

    virtual G4double GetDistanceFromPoint( const G4ThreeVector& point ) const;
      // Minimal distance from a point to the cylindrical surface in any
      // direction

    virtual G4Plane3D GetTangentPlane( const G4ThreeVector& point ) const;
      // Get plane tangent to cylindrical surface at a given point

    virtual void Dump( const G4String& msg ) const;
      // Dump cylindrical surface parameter

  private:

     G4double fradius;
     G4AffineTransform ftransform;
};

#endif
