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<!doctype html>
<html lang="en">
<head>
<title>Snake</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" type="text/css" href="/css/styles.css">
</head>
<body>
<canvas id="canvas"></canvas>
<script>
var gameInterval;
var canvas;
var ctx;
var tileCountWidth;
var tileCountHeight;
var tileWidth;
var tileHeight;
var vx;
var vy;
var score;
var t;
var apple;
var isGameOver;
var mouseX;
var mouseY;
var length;
function init() {
tileCountWidth = 40
tileCountHeight = 40
tileWidth = 10;
tileHeight = 10;
snake = { body: [] };
length = 5;
setRandomCoords(snake);
apple = {};
setRandomCoords(apple);
vx = 1;
vy = 0;
score = 0;
isGameOver = false;
mouseX = 0;
mouseY = 0;
t = 0;
}
window.onload = function () {
canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");
window.addEventListener('resize', resizeCanvas, false);
window.addEventListener('orientationchange', resizeCanvas, false);
resizeCanvas();
document.addEventListener("keydown", keyPush);
document.addEventListener("mousedown", mousePush);
gameInterval = setInterval(game, 1000 / 10);
init();
}
function resizeCanvas() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
}
function game() {
update();
draw();
}
function draw() {
color("black");
// ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.fillRect(0, 0, 400,400);
color("white");
ctx.fillRect(0, 400, 400, 410);
for (var i = 0; i < snake.body.length; i++) {
ctx.fillRect(snake.body[i].x * tileWidth, snake.body[i].y * tileHeight, tileWidth, tileHeight);
}
color("red");
ctx.fillRect(apple.x * tileWidth, apple.y * tileHeight, tileWidth, tileHeight);
font(20);
color("black");
ctx.fillText("Score: " + score, 20, 450);
// ctx.fillText(mouseX + " " + mouseY, 20, 500);
color("orange");
// ctx.fillRect(210, 410, 390, 590)
ctx.beginPath();
ctx.arc(300, 500, 100, 0, 2 * Math.PI);
ctx.stroke();
color("black");
ctx.beginPath();
ctx.moveTo(210, 410);
ctx.lineTo(390, 590);
ctx.moveTo(390, 410);
ctx.lineTo(210, 590);
ctx.stroke();
if (isGameOver) {
color("red");
font(20);
ctx.fillText("Game over!", 160, 200);
font(14);
ctx.fillText("(tap to restart)", 152, 220);
}
}
function update() {
t++;
snake.x += vx;
snake.y += vy;
if (snake.x < 0 || snake.x >= tileCountWidth || snake.y < 0 || snake.y >= tileCountHeight)
gameOver();
// if(snake.some((piece) => {return piece.x = x && piece.y == y;})){
// gameOver();
// }
snake.body.push({ "x": snake.x, "y": snake.y });
if (snake.x == apple.x && snake.y == apple.y) {
length++;
setRandomCoords(apple);
score += 10 + max(50 - t, 0)
t = 0;
}
while (snake.body.length > length) {
snake.body.shift();
}
}
function max(a, b) {
return a > b ? a : b;
}
function keyPush(e) {
console.log(vx, vy);
switch (e.keyCode) {
case 37:
if (vx == 1) return;
vx = -1;
vy = 0;
break;
case 38:
if (vy == 1) return;
vx = 0;
vy = -1;
break;
case 39:
if (vx == -1) return;
vx = 1;
vy = 0;
break;
case 40:
if (vy == -1) return;
vx = 0;
vy = 1;
break;
}
}
function mousePush(e) {
if(isGameOver){
init();
return;
}
mouseX = e.clientX - 300;
mouseY = e.clientY - 500;
var d = canvas.getBoundingClientRect();
mouseX -= d.left;
mouseY -= d.top;
if (Math.sqrt(mouseX * mouseX + mouseY * mouseY) > 100) {
return;
}
if (Math.abs(mouseX) > Math.abs(mouseY)) {
if (mouseX < 0) {
keyPush({keyCode: 37})
} else {
keyPush({keyCode: 39})
}
} else {
if (mouseY < 0) {
keyPush({keyCode: 38})
} else {
keyPush({keyCode: 40})
}
}
}
function setRandomCoords(item) {
item.x = randomInt(tileCountWidth);
item.y = randomInt(tileCountHeight);
}
function randomInt(max) {
return Math.floor(Math.random() * max);
}
function font(size) {
ctx.font = size + "px Courier";
}
function color(c) {
ctx.fillStyle = c;
}
function gameOver() {
isGameOver = true;
clearInterval(gameInterval);
}
</script>
</body>
</html>
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