tsshogi
Version:
TypeScript library for Shogi (Japanese chess)
164 lines • 10.8 kB
JavaScript
import { Direction, vectorToDirectionAndDistance } from "./direction.mjs";
function usiFileToNumber(usi) {
return usi >= "1" && usi <= "9" ? Number(usi) : null;
}
function usiRankToNumber(usi) {
switch (usi) {
case "a":
return 1;
case "b":
return 2;
case "c":
return 3;
case "d":
return 4;
case "e":
return 5;
case "f":
return 6;
case "g":
return 7;
case "h":
return 8;
case "i":
return 9;
default:
return null;
}
}
const sfenRanks = ["a", "b", "c", "d", "e", "f", "g", "h", "i"];
/**
* マス目
*/
export class Square {
file;
rank;
constructor(file, rank) {
this.file = file;
this.rank = rank;
}
/**
* 9筋を0としたx座標
*/
get x() {
return 9 - this.file;
}
/**
* 1段目を0としたy座標
*/
get y() {
return this.rank - 1;
}
/**
* 0～80のインデックス
* 0=「9一」, 1=「8一」, ..., 80=「1九」
*/
get index() {
return this.y * 9 + this.x;
}
/**
* 先後を反転したマスを取得します。
*/
get opposite() {
return new Square(10 - this.file, 10 - this.rank);
}
neighbor(arg0, arg1) {
switch (arg0) {
case Direction.UP:
return new Square(this.file, this.rank - 1);
case Direction.DOWN:
return new Square(this.file, this.rank + 1);
case Direction.LEFT:
return new Square(this.file + 1, this.rank);
case Direction.RIGHT:
return new Square(this.file - 1, this.rank);
case Direction.LEFT_UP:
return new Square(this.file + 1, this.rank - 1);
case Direction.RIGHT_UP:
return new Square(this.file - 1, this.rank - 1);
case Direction.LEFT_DOWN:
return new Square(this.file + 1, this.rank + 1);
case Direction.RIGHT_DOWN:
return new Square(this.file - 1, this.rank + 1);
case Direction.LEFT_UP_KNIGHT:
return new Square(this.file + 1, this.rank - 2);
case Direction.RIGHT_UP_KNIGHT:
return new Square(this.file - 1, this.rank - 2);
case Direction.LEFT_DOWN_KNIGHT:
return new Square(this.file + 1, this.rank + 2);
case Direction.RIGHT_DOWN_KNIGHT:
return new Square(this.file - 1, this.rank + 2);
}
const dx = arg0;
const dy = arg1;
return new Square(this.file - dx, this.rank + dy);
}
/** 指定したマスへの方向を返します。 */
directionTo(square) {
return vectorToDirectionAndDistance(square.x - this.x, square.y - this.y).direction;
}
/** 有効なマス目であるか判定します。 */
get valid() {
return this.file >= 1 && this.file <= 9 && this.rank >= 1 && this.rank <= 9;
}
/** 同じマス目か判定します。 */
equals(square) {
return !!square && this.file === square.file && this.rank === square.rank;
}
/**
* 座標を指定してマスを取得します。
* @param x
* @param y
*/
static newByXY(x, y) {
return new Square(9 - x, y + 1);
}
/**
* インデクスを指定してマスを取得します。
* @param index
*/
static newByIndex(index) {
return new Square(9 - (index % 9), Math.trunc(index / 9) + 1);
}
/**
* 全てのマス目の一覧
*/
static all = [];
/**
* SFEN形式の文字列を取得します。
* @deprecated Use usi instead.
*/
get sfen() {
return this.usi;
}
/**
* USI形式の文字列を取得します。
*/
get usi() {
return this.file + sfenRanks[this.rank - 1];
}
/**
* SFEN形式のマス目をパースします。
* @param sfen
* @deprecated Use newByUSI instead.
*/
static parseSFENSquare(sfen) {
return Square.newByUSI(sfen);
}
/**
* USI形式のマス目をパースします。
* @param usi
*/
static newByUSI(usi) {
const file = usiFileToNumber(usi[0]);
const rank = usiRankToNumber(usi[1]);
if (!file || !rank) {
return null;
}
return new Square(file, rank);
}
}
for (let index = 0; index < 81; index += 1) {
Square.all.push(Square.newByIndex(index));
}
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