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index.js
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179 lines (151 loc) · 4.24 KB
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// GAME Constants and variable
let inputDirection = { x: 0, y: 0 }; //origin
const foodsound = new Audio("food.wav");
const gameoversound = new Audio("gameover.wav");
const music = document.getElementById("music");
const click = new Audio("click.wav");
let speed = 5;
let score = 0;
let lastPaintTime = 0;
music.play;
let snakeArr = [
// { x: 13, y: 15 },
{
x: Math.round(2 + (16 - 2) * Math.random()),
y: Math.round(2 + (16 - 2) * Math.random()),
}
// y is row and x is column
];
// food = { x: 6, y: 7 };
food = {
x: Math.round(2 + (16 - 2) * Math.random()),
y: Math.round(2 + (16 - 2) * Math.random()),
};
// Game functions
function main(ctime) {
window.requestAnimationFrame(main); //something like recursion
// console.log(ctime);
if ((ctime - lastPaintTime) / 1000 < 1 / speed) {
return;
}
lastPaintTime = ctime;
gameEngine();
}
function isCollide(snake) {
// if you bumb into yourself
for (let i = 1; i < snake.length; i++) {
if (snake[i].x === snake[0].x && snake[i].y === snake[0].y) {
return true;
}
}
if (
snake[0].x >= 18 ||
snake[0].x <= 0 ||
snake[0].y >= 18 ||
snake[0].y <= 0
) {
return true;
}
return false;
}
function gameEngine() {
// Part1 :updating the snake body parts and food
if (isCollide(snakeArr)) {
gameoversound.play();
music.pause();
inputDirection = { x: 0, y: 0 };
alert("GAME OVER !🥺, press any key to play again");
snakeArr = [{ x: 13, y: 15 }];
music.play();
score = 0;
}
// if you have eaten food, increment the score and regenerate the food
if (snakeArr[0].y === food.y && snakeArr[0].x === food.x) {
foodsound.play();
score+=1;
if (score>Highscoreval) {
Highscoreval=score;
localStorage.setItem("Highscore",JSON.stringify(Highscoreval))
HighscoreBox.innerHTML="HighScore : " + Highscoreval;
}
scoreBox.innerHTML="Score : "+score;
snakeArr.unshift({
x: snakeArr[0].x + inputDirection.x,
y: snakeArr[0].y + inputDirection.y,
});
let a = 2;
let b = 16; //our grid dimension which is 0-18 but to be lineant give a range less than a edge value
food = {
x: Math.round(a + (b - a) * Math.random()),
y: Math.round(a + (b - a) * Math.random()),
};
}
// Moving the snake
for (let i = snakeArr.length - 2; i >= 0; i--) {
snakeArr[i + 1] = { ...snakeArr[i] }; //
}
snakeArr[0].x += inputDirection.x;
snakeArr[0].y += inputDirection.y;
// part2: render/display the snake and food
// Displaying the snake
background.innerHTML = ""; //intially empty the div
snakeArr.forEach((e, index) => {
snakeElement = document.createElement("div");
snakeElement.style.gridRowStart = e.y;
snakeElement.style.gridColumnStart = e.x;
if (index === 0) {
snakeElement.classList.add("head");
} else {
snakeElement.classList.add("snake");
}
background.appendChild(snakeElement);
});
// Displaying the Food
foodElement = document.createElement("div");
foodElement.style.gridRowStart = food.y;
foodElement.style.gridColumnStart = food.x;
foodElement.classList.add("food");
background.appendChild(foodElement);
}
// checkout this somewhat used for looping in animation
// MAIN Function
music.loop = true;
music.load();
let Highscore = localStorage.getItem("Highscore");
if (Highscore === null) {
Highscoreval = 0;
localStorage.setItem("Highscore", JSON.stringify(Highscoreval));
} else {
Highscoreval = JSON.parse(Highscore);
HighscoreBox.innerHTML = "HighScore: " + Highscore;
}
window.requestAnimationFrame(main);
music.autoplay="true";
window.addEventListener("keydown", (e) => {
inputDirection = { x: 0, y: 1 }; //start the game
click.play();
switch (e.key) {
case "ArrowUp":
console.log("ArrowUp");
inputDirection.x = 0;
inputDirection.y = -1;
break;
case "ArrowDown":
console.log("ArrowDown");
inputDirection.x = 0;
inputDirection.y = 1;
break;
case "ArrowLeft":
console.log("ArrowLeft");
inputDirection.x = -1;
inputDirection.y = 0;
break;
case "ArrowRight":
console.log("ArrowRight");
inputDirection.x = 1;
inputDirection.y = 0;
break;
default:
break;
}
});