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#ifndef WOLFF_MODELS_ISING_H
#define WOLFF_MODELS_ISING_H
#define WOLFF_FINITE_STATES_N 2
#include "../wolff.hpp"
namespace wolff {
class ising_t {
public:
bool x;
ising_t() : x(false) {}
ising_t(bool x) : x(x) {}
ising_t(unsigned x) : x((bool)x) {}
ising_t act(const ising_t& s) const {
if (x) {
return ising_t(!s.x);
} else {
return ising_t(s.x);
}
}
ising_t act_inverse(const ising_t& s) const {
return this->act(s);
}
typedef int M_t;
typedef double F_t;
inline M_t operator*(unsigned a) const {
if (x) {
return -(M_t)a;
} else {
return (M_t)a;
}
}
inline F_t operator*(double a) const {
if (x) {
return -a;
} else {
return a;
}
}
inline M_t operator-(const ising_t &s) const {
if (x == s.x) {
return 0;
} else {
if (x) {
return -2;
} else {
return 2;
}
}
}
inline int operator+(int a) const {
if (x) {
return a - 1;
} else {
return a + 1;
}
}
inline int operator*(const ising_t& s) const {
if (x == s.x) {
return 1;
} else {
return -1;
}
}
unsigned enumerate() const {
return (unsigned)x;
}
};
inline int operator+(int a, const ising_t& s) {
return s + a;
}
inline ising_t::M_t operator*(unsigned a, const ising_t& s) {
return s * a;
}
inline ising_t::F_t operator*(double a, const ising_t& s) {
return s * a;
}
template <class G_t>
ising_t gen_ising(std::mt19937&, const system<ising_t, ising_t, G_t>&, const typename G_t::vertex&) {
return ising_t(true);
};
}
#endif
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