Struct shogi::bitboard::Factory

pub struct Factory {}

Creates various bitboard instances.

init method needs to be called first for pre-calculation.

Examples

use shogi::bitboard::Factory;
use shogi::square::consts::*;

// init() shold be called before other method calls.
Factory::init();
let bb = Factory::between(SQ_1A, SQ_9I);
assert_eq!(7, bb.count());

Implementations

impl Factory

pub fn init()

Pre-calculate complex bitboards for faster table lookup. This method needs to be called once before other methods in Factory get called.

pub fn attacks_from(pt: PieceType, c: Color, sq: Square) -> Bitboard

Returns a bitboard in which squares attacked by the given piece are filled.

pub fn rook_attack(sq: Square, occupied: &Bitboard) -> Bitboard

Returns a bitboard in which squares attacked by Rook at the given square are filled.

pub fn bishop_attack(sq: Square, occupied: &Bitboard) -> Bitboard

Returns a bitboard in which squares attacked by Bishop at the given square are filled.

pub fn lance_attack(c: Color, sq: Square, occupied: &Bitboard) -> Bitboard

Returns a bitboard in which squares attacked by Lance at the given square are filled.

pub fn promote_zone(c: Color) -> Bitboard

Returns a bitboard in which squares in opposite player’s area are filled.

pub fn between(sq1: Square, sq2: Square) -> Bitboard

Returns a bitboard in which squares between the given two squares are filled.