SymPermutation.hh

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#ifndef SYMPERMUTATION_HH
#define SYMPERMUTATION_HH
 
#include <cmath>
#include <iostream>
 
#include "casm/container/Permutation.hh"
#include "casm/symmetry/SymOpRepresentation.hh"
 
namespace CASM {
namespace xtal {
class Lattice;
}
using xtal::Lattice;
 
class MasterSymGroup;
 
class SymPermutation : public SymOpRepresentation {
 public:
  template <typename Iterator>
  SymPermutation(Iterator begin, Iterator end)
      : m_permute(begin, end), m_has_mat(false) {}
 
  SymPermutation(const std::vector<Index> &init_permute)
      : m_permute(init_permute), m_has_mat(false) {}
 
  SymPermutation(const Permutation &init_permute)
      : m_permute(init_permute), m_has_mat(false) {}
 
  double character() const override;
 
  SymOpRepresentation *copy() const override {
    return new SymPermutation(*this);
  }
 
  Permutation const *permutation() const override { return &m_permute; }
 
  Eigen::MatrixXd const *MatrixXd() const override {
    if (!m_has_mat) _calc_mat();
    return &m_mat;
  }
 
 protected:
  SymOpRepresentation *inverse_impl() const override {
    return new SymPermutation(m_permute.inverse());
  }
 
 private:
  Permutation m_permute;
 
  // true if m_mat is initialized
  bool m_has_mat;
 
  mutable Eigen::MatrixXd m_mat;
 
  void _calc_mat() const;
};
 
}  // namespace CASM
#endif