pbc_lattice.hpp File Reference

Precomputed periodic-boundary neighbor arrays for a 2D square lattice. More...

#include <vector>

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Classes
struct	num::PBCLattice2D
	4-neighbor periodic-boundary index arrays for an N×N lattice. More...

Namespaces
namespace	num

Detailed Description

Precomputed periodic-boundary neighbor arrays for a 2D square lattice.

PBCLattice2D builds up[i], dn[i], lt[i], rt[i] once from modulo arithmetic so the hot-path (Metropolis sweeps, BFS cluster detection) never calls %.

Flat layout: i = row * N + col, row and col in [0, N).

Definition in file pbc_lattice.hpp.