Function_moment_curve_in_Rd.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):       Siargey Kachanovich
 *
 *    Copyright (C) 2019 Inria
 *
 *    Modification(s):
 *      - YYYY/MM Author: Description of the modification
 */
 
#ifndef FUNCTIONS_FUNCTION_MOMENT_CURVE_IN_RD_H_
#define FUNCTIONS_FUNCTION_MOMENT_CURVE_IN_RD_H_
 
#include <cstdlib>  // for std::size_t
 
#include <Eigen/Dense>
 
namespace Gudhi {
 
namespace coxeter_triangulation {
 
struct Function_moment_curve_in_Rd {
  Eigen::VectorXd operator()(const Eigen::VectorXd& p) const {
    Eigen::VectorXd result(k_);
    for (std::size_t i = 1; i < d_; ++i) result(i - 1) = p(i) - p(0) * p(i - 1);
    return result;
  }
 
  std::size_t amb_d() const { return d_; };
 
  std::size_t cod_d() const { return k_; };
 
  Eigen::VectorXd seed() const {
    Eigen::VectorXd result = Eigen::VectorXd::Zero(d_);
    return result;
  }
 
  double get_radius() const{
  return r_;
  }
 
  Function_moment_curve_in_Rd(double r, std::size_t d) : k_(d - 1), d_(d), r_(r) {}
 
  Function_moment_curve_in_Rd(double r, std::size_t d, Eigen::VectorXd& offset)
  : k_(d - 1), d_(d), r_(r), off_(offset) {}
 
 private:
  std::size_t k_, d_;
  double r_;
  Eigen::VectorXd off_;
};
 
}  // namespace coxeter_triangulation
 
}  // namespace Gudhi
 
#endif