五子棋获得所有赢法JavaScript

let  allwin=[];
function getCount(x, y) {
let countTemp = 0, ym = y - 4, xm = x - 4;

for (let i = 0; i < x; i++) {
    allwin[i] = [];
    for (let j = 0; j < y; j++) {
        allwin[i][j] = [];
    }
}

for (i = 0; i < y; i++) {
    for (j = 0; j < xm; j++) {
        for (let k = 0; k < 5; k++) {
            allwin[j + k][i][countTemp] = true;
        }
        countTemp++;
    }
}

//纵线
for (i = 0; i < x; i++) {
    for (j = 0; j < ym; j++) {
        for (k = 0; k < 5; k++) {
            allwin[i][j + k][countTemp] = true;
        }
        countTemp++;
    }
}
//正斜线
for (i = 0; i < xm; i++) {
    for (j = 0; j < ym; j++) {
        for (k = 0; k < 5; k++) {
            allwin[i + k][j + k][countTemp] = true;
        }
        countTemp++;
    }
}
//反斜线
for (i = 0; i < xm; i++) {
    for (j = 0; j < ym; j++) {
        for (k = 0; k < 5; k++) {
            allwin[i + k][j + k][countTemp] = true;
        }
        countTemp++;
    }
}
return countTemp;
}
var count = getCount(20, 20);
console.log(count);
console.log(allwin);