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connect_four.js
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/*
@title: connect_four
@author: sam liu
@tags: ['retro']
@addedOn: 2022-08-29
The typical Connect Four game.
Controls:
a - move selection left
d - move selection right
s - drop token
*/
const yellow = "y";
const red = "r";
const arrow_yellow = "w";
const arrow_red = "d";
const frame = "f";
const select = "s";
const horizontal = "h";
const vertical = "v";
const diagonal_r = "i";
const diagonal_l = "e";
setLegend(
[ horizontal, bitmap`
................
................
................
................
................
................
................
0000000000000000
0000000000000000
................
................
................
................
................
................
................`],
[ vertical, bitmap`
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......
.......00.......`],
[ diagonal_r, bitmap`
..............00
.............000
............000.
...........000..
..........000...
.........000....
........000.....
.......000......
......000.......
.....000........
....000.........
...000..........
..000...........
.000............
000.............
00..............`],
[ diagonal_l, bitmap`
00..............
000.............
.000............
..000...........
...000..........
....000.........
.....000........
......000.......
.......000......
........000.....
.........000....
..........000...
...........000..
............000.
.............000
..............00`],
[ yellow, bitmap`
................
....66666666....
...6666666666...
..666666666666..
.66666666666666.
.66666666666666.
.66666666666666.
.66666666666666.
.66666666666666.
.66666666666666.
.66666666666666.
.66666666666666.
..666666666666..
...6666666666...
....66666666....
................` ],
[ red, bitmap`
................
....33333333....
...3333333333...
..333333333333..
.33333333333333.
.33333333333333.
.33333333333333.
.33333333333333.
.33333333333333.
.33333333333333.
.33333333333333.
.33333333333333.
..333333333333..
...3333333333...
....33333333....
................` ],
[ arrow_yellow, bitmap`
................
......6666......
......6666......
......6666......
......6666......
......6666......
......6666......
......6666......
......6666......
..666666666666..
...6666666666...
....66666666....
.....666666.....
......6666......
.......66.......
................` ],
[ arrow_red, bitmap`
................
......3333......
......3333......
......3333......
......3333......
......3333......
......3333......
......3333......
......3333......
..333333333333..
...3333333333...
....33333333....
.....333333.....
......3333......
.......33.......
................` ],
[ frame, bitmap`
5555555555555555
5555........5555
555..........555
55............55
5..............5
5..............5
5..............5
5..............5
5..............5
5..............5
5..............5
5..............5
55............55
555..........555
5555........5555
5555555555555555` ],
[ select, bitmap`
0000000000000000
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0..............0
0000000000000000` ]
);
// 0 - Yellow, 1 - Red
let turn = 0;
setMap(map`
wwwwwww
fffffff
fffffff
fffffff
fffffff
fffffff
fffffff`);
let selection = 3;
addSprite(selection, 0, select);
let player = getFirst(select);
let token;
let board = [
[-1, -1, -1, -1, -1, -1, -1],
[-1, -1, -1, -1, -1, -1, -1],
[-1, -1, -1, -1, -1, -1, -1],
[-1, -1, -1, -1, -1, -1, -1],
[-1, -1, -1, -1, -1, -1, -1],
[-1, -1, -1, -1, -1, -1, -1],
]
let won = false;
const drawBoard = () => {
for (let x = 0; x < 7; x++) {
for (let y = 0; y < 6; y++) {
clearTile(x, y+1);
addSprite(x, y+1, frame);
if (board[y][x] == 0) {
addSprite(x, y+1, yellow);
} else if (board[y][x] == 1) {
addSprite(x, y+1, red);
};
};
};
for (let x = 0; x < 7; x++) {
clearTile(x, 0);
if (turn == 0) {
addSprite(x, 0, arrow_yellow);
} else {
addSprite(x, 0, arrow_red);
};
};
addSprite(selection, 0, select);
player = getFirst(select);
}
const nextTurn = () => {
turn += 1;
turn = turn % 2;
drawBoard();
}
const win = () => {
for (let x = 0; x < 7; x++) {
clearTile(x, 0);
};
if (turn == 0) {
addText("Yellow Wins", {
x: 5,
y: 1,
color: color`0`
});
} else {
addText("Red Wins", {
x: 6,
y: 1,
color: color`0`
});
};
// console.log(`${turn} Wins!`)
}
const checkWin = () => {
for (let x = 0; x < 7; x++) {
for (let y = 0; y < 6; y++) {
if (x < 4) {
if (board[y][x] == turn && board[y][x+1] == turn && board[y][x+2] == turn && board[y][x+3] == turn ) {
addSprite(x, y+1, horizontal);
addSprite(x+1, y+1, horizontal);
addSprite(x+2, y+1, horizontal);
addSprite(x+3, y+1, horizontal);
win();
won = true;
break;
};
};
if (y < 3) {
if (board[y][x] == turn && board[y+1][x] == turn && board[y+2][x] == turn && board[y+3][x] == turn ) {
addSprite(x, y+1, vertical);
addSprite(x, y+2, vertical);
addSprite(x, y+3, vertical);
addSprite(x, y+4, vertical);
win();
won = true;
break;
};
};
if (y < 3 && x < 4) {
if (board[y][x] == turn && board[y+1][x+1] == turn && board[y+2][x+2] == turn && board[y+3][x+3] == turn ) {
addSprite(x, y+1, diagonal_l);
addSprite(x+1, y+2, diagonal_l);
addSprite(x+2, y+3, diagonal_l);
addSprite(x+3, y+4, diagonal_l);
win();
won = true;
break;
};
};
if (y > 2 && x < 4) {
if (board[y][x] == turn && board[y-1][x+1] == turn && board[y-2][x+2] == turn && board[y-3][x+3] == turn ) {
addSprite(x, y+1, diagonal_r);
addSprite(x+1, y, diagonal_r);
addSprite(x+2, y-1, diagonal_r);
addSprite(x+3, y-2, diagonal_r);
win();
won = true;
break;
};
};
};
if (won) { break };
};
if (!won) {
nextTurn();
};
}
const dropToken = () => {
for (let y = 5; y >= 0; y--) {
if (board[y][selection] == -1) {
board[y][selection] = turn;
drawBoard();
checkWin();
break;
};
};
}
onInput("a", () => {
selection--;
});
onInput("d", () => {
selection++;
});
onInput("s", () => {
if (!won) {
dropToken();
};
});
afterInput(() => {
if (!won) {
if (selection < 0) {
selection = 6;
} else if (selection > 6) {
selection = 0;
};
player.x = selection;
};
});
drawBoard();