from_file_vg.h

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/* Author(s) :    Francois Mauger <mauger@lpccaen.in2p3.fr>
 * Creation date: 2010-02-13
 * Last modified: 2014-04-09
 *
 * License:
 *
 * Description:
 *   Generate vertex from a file
 *
 * History:
 *
 */

#ifndef GENVTX_FROM_FILE_VG_H
#define GENVTX_FROM_FILE_VG_H 1

// Standard library:
#include <fstream>
#include <string>

// This project:
#include <genvtx/i_vertex_generator.h>

namespace genvtx {

  class from_file_vg : public i_vertex_generator
  {
  public:

    static double default_length_unit();

    static double default_time_unit();

    bool is_open() const;

    const std::string & get_filename() const;

    void set_filename(const std::string &);

    void set_length_unit(double lu_);

    double get_length_unit() const;

    void set_time_unit(double tu_);

    double get_time_unit() const;

    from_file_vg();

    virtual ~from_file_vg();

    virtual void initialize(const ::datatools::properties &,
                             ::datatools::service_manager &,
                             ::genvtx::vg_dict_type &);

    virtual void reset();

    virtual bool is_initialized() const;

    virtual bool has_next_vertex() const;

  protected :

    virtual void _shoot_vertex(::mygsl::rng & random_, ::geomtools::vector_3d & vertex_);

    virtual void _shoot_vertex_and_time(::mygsl::rng & random_, ::geomtools::vector_3d & vertex_, double & time_);

    void _open_source();

    void _close_source();

    void _read_next();

    bool _has_next();

  private:

    // Configuration:
    std::string          _filename_;    
    double               _length_unit_; // default length unit (default == 1);
    double               _time_unit_;   // default time unit (default == 1);

    // Working:
    bool                 _open_;      
    std::ifstream        _source_;    
    geomtools::vector_3d _next_;      
    double               _next_time_; 

    GENVTX_VG_REGISTRATION_INTERFACE(from_file_vg)

  };

  typedef from_file_vg from_file_vertex_generator;

} // end of namespace genvtx

#endif // GENVTX_FROM_FILE_VG_H

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** c-file-style: "gnu" --
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*/