Constant_function.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_CONSTANT_FUNCTION_H_
#define FUNCTIONS_CONSTANT_FUNCTION_H_
 
#include <cstdlib>  // for std::size_t
 
#include <Eigen/Dense>
 
namespace Gudhi {
 
namespace coxeter_triangulation {
 
struct Constant_function {
  Eigen::VectorXd operator()(const Eigen::VectorXd& p) const {
    return value_;
  }
 
  std::size_t amb_d() const { return d_; };
 
  std::size_t cod_d() const { return k_; };
 
  Eigen::VectorXd seed() const { throw "Seed invoked on a constant function.\n"; }
 
  Constant_function() {}
 
  Constant_function(std::size_t d, std::size_t k, const Eigen::VectorXd& value) : d_(d), k_(k), value_(value) {}
 
 private:
  std::size_t d_, k_;
  Eigen::VectorXd value_;
};
 
}  // namespace coxeter_triangulation
 
}  // namespace Gudhi
 
#endif