Points_off_io.h

/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
 *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
 *    Author(s):       Vincent Rouvreau
 *
 *    Copyright (C) 2015 Inria
 *
 *    Modification(s):
 *      - YYYY/MM Author: Description of the modification
 */
#ifndef POINTS_OFF_IO_H_
#define POINTS_OFF_IO_H_
 
#include <gudhi/Off_reader.h>
 
#include <string>
#include <vector>
#include <fstream>
#include <map>
 
namespace Gudhi {
 
template<typename Point_d>
class Points_off_visitor_reader {
 private:
  std::vector<Point_d> point_cloud;
 
 public:
  void init(int dim, int num_vertices, int num_faces, int num_edges) {
#ifdef DEBUG_TRACES
    std::clog << "Points_off_visitor_reader::init - dim=" << dim << " - num_vertices=" <<
        num_vertices << " - num_faces=" << num_faces << " - num_edges=" << num_edges << std::endl;
#endif  // DEBUG_TRACES
    if (num_faces > 0) {
      std::cerr << "Points_off_visitor_reader::init faces are not taken into account from OFF file for Points.\n";
    }
    if (num_edges > 0) {
      std::cerr << "Points_off_visitor_reader::init edges are not taken into account from OFF file for Points.\n";
    }
  }
 
  void point(const std::vector<double>& point) {
#ifdef DEBUG_TRACES
    std::clog << "Points_off_visitor_reader::point ";
    for (auto coordinate : point) {
      std::clog << coordinate << " | ";
    }
    std::clog << std::endl;
#endif  // DEBUG_TRACES
    // Fill the point cloud
    point_cloud.push_back(Point_d(point.begin(), point.end()));
  }
 
  // Off_reader visitor maximal_face implementation - Only points are read
  void maximal_face(const std::vector<int>& face) { }
 
  // Off_reader visitor done implementation - Only points are read
  void done() { }
 
  const std::vector<Point_d>& get_point_cloud() const {
    return point_cloud;
  }
};
 
template<typename Point_d>
class Points_off_reader {
 public:
  Points_off_reader(const std::string& name_file)
  : valid_(false) {
    std::ifstream stream(name_file);
    if (stream.is_open()) {
      Off_reader off_reader(stream);
      Points_off_visitor_reader<Point_d> off_visitor;
      valid_ = off_reader.read(off_visitor);
      if (valid_) {
        point_cloud = off_visitor.get_point_cloud();
      }
    } else {
      std::cerr << "Points_off_reader::Points_off_reader could not open file " << name_file << "\n";
    }
  }
 
  bool is_valid() const {
    return valid_;
  }
 
  const std::vector<Point_d>& get_point_cloud() const {
    return point_cloud;
  }
 
 private:
  std::vector<Point_d> point_cloud;
  bool valid_;
};
 
}  // namespace Gudhi
 
#endif  // POINTS_OFF_IO_H_