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snakeGame.js
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snakeGame.js
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/*******************************
* *
* Project: Snake Game v2 *
* File: snakeGame.js *
* Version: 2.0 *
* *
*******************************/
window.onload = function() {
if(document.body.clientWidth <= 1920) {
var canvasWidth = 1800;
if(document.body.clientWidth <= 1680) { canvasWidth = 1500; }
if(document.body.clientWidth <= 1440) { canvasWidth = 1200; }
if(document.body.clientWidth <= 1024) { canvasWidth = 900; }
if(document.body.clientHeight <= 1080) {
var canvasHeight = 900;
if(document.body.clientHeight <= 900) { canvasHeight = 600; }
if(document.body.clientHeight <= 320) { canvasHeight = 300; }
}
}
var difficulty = document.location.hash === '#hardcore';
var blockSize = 30;
var game;
var delay = 100;
var snakee;
var applee;
var widthInBlocks = canvasWidth/blockSize;
var heightInBlocks = canvasHeight/blockSize;
var score;
var timeOut;
var k = 0;
function init() {
if(difficulty) { document.getElementById('sound').play(); }
canvas = document.createElement('canvas');
canvas.width = canvasWidth;
canvas.height = canvasHeight;
canvas.style.backgroundColor = '#EEEEEE';
canvas.style.border = '1px solid #999999';
canvas.style.margin = ' 30px auto';
canvas.style.display = 'block';
document.body.appendChild(canvas);
game = canvas.getContext('2d');
snakee = new snake([[2, 0], [1, 0], [0, 0]], 'right');
applee = new apple([10, 10]);
score = 0;
update();
}
function hardcore() {
if(((score*5) === 100 || (score*5) === 200) && (delay === 100 || delay === 50)) { delay -= 25; }
if(k > 1) { k = 0; }
marg = [20, 20];
marg[k] += 1*score;
canvas.style.margin = marg[0]+'px 0px 0px '+marg[1]+'px';
return k++;
}
function update() {
snakee.progress();
if(snakee.collision()) { gameOver(); }
else {
if(snakee.eat(applee)) {
score++;
window.player['score'] = score*5;
snakee.eatApple = true;
do { applee.setNewPos(); }
while(applee.onSnake(snakee))
}
game.clearRect(0, 0, canvas.width, canvas.height);
snakee.draw();
applee.draw();
game.font = 'bold 20px Monospace';
game.fillStyle = '#222222';
game.textAlign = 'center';
game.fillText("SCORE : "+score*5, canvasWidth/2, canvasHeight-20)
game.fillText("APPLE EAT : "+score, canvasWidth/2, canvasHeight-5)
timeOut = setTimeout(update, delay);
if(difficulty) hardcore();
}
}
function gameOver() {
game.save();
game.font = 'bold 60px Monospace';
game.fillText("GAME OVER", canvasWidth/2, canvasHeight/2);
game.font = 'bold 20px Monospace';
game.fillText("PRESS SPACE TO RESTART", canvasWidth/2, (canvasHeight/2)+19);
game.fillText("OR ESCAPE TO CHANGE PLAYER", canvasWidth/2, (canvasHeight/2)+38);
game.font = 'bold 30px Monospace';
game.fillText("YOUR PLACE : "+window.player['place'], canvasWidth/2, (canvasHeight-50));
game.font = '15px Monospace';
game.textAlign = 'left';
game.fillText("> Snake Game 2.0", 5, 15);
game.fillText("> Game coded by 4N4RCHY", 5, 30);
if(difficulty) {
game.fillText("> Music composed by ROBORG", 5, 45);
game.fillText(" Midnight Murder (feat. NeoSlave)", 5, 60);
}
leaderBoard();
game.restore();
}
function leaderBoard(i, z) {
if(!z) { var z = 185; }
if(!i) { var i = 0; game.fillText("--- Top 10 Best Players ---", 25, canvasHeight-205); }
game.font = '15px Monospace';
game.textAlign = 'left';
game.fillText(leaderboard['player'][i], 5, canvasHeight-z);
game.fillText(leaderboard['score'][i], 205, canvasHeight-z);
z -= 20;
i++;
if(i < 10) { setTimeout(function() { leaderBoard(i, z); }, 25); }
}
function restart() {
snakee = new snake([[2, 0], [1, 0], [0, 0]], 'right');
applee = new apple([10, 10]);
delay = 100;
score = 0;
clearTimeout(timeOut);
update();
}
function drawBlock(game, pos) {
var x = pos[0]*blockSize;
var y = pos[1]*blockSize;
game.fillRect(x, y, blockSize, blockSize);
}
function snake(body, direction) {
this.body = body;
this.direction = direction;
this.eatApple = false;
this.draw = function() {
game.save();
game.fillStyle = '#AAAAAA';
for(var i = 0; i < this.body.length; i++) { drawBlock(game, this.body[i]); }
game.restore();
}
this.progress = function() {
var nextPos = this.body[0].slice();
switch(this.direction) {
case 'left': nextPos[0]--; break;
case 'right': nextPos[0]++; break;
case 'down': nextPos[1]--; break;
case 'up': nextPos[1]++; break;
default: throw('ERROR PROGRESS DIRECT');
}
this.body.unshift(nextPos);
if(!this.eatApple) { this.body.pop(); }
else { this.eatApple = false; }
}
this.setDirect = function(newDirect) {
var allowDirect;
switch(this.direction) {
case 'left':
case 'right': allowDirect = ['up', 'down']; break;
case 'down':
case 'up': allowDirect = ['left', 'right']; break;
default: throw('ERROR SET DIRECT');
}
if(allowDirect.indexOf(newDirect) > -1) { this.direction = newDirect; }
}
this.collision = function() {
var wallCollide = false;
var snakeCollide = false;
var horizonWall = this.body[0][0] < 0 || this.body[0][0] > widthInBlocks-1;
var verticalWall = this.body[0][1] < 0 || this.body[0][1] > heightInBlocks-1;
if(horizonWall || verticalWall) { wallCollide = true; }
for(var i = 0; i < this.body.slice(1).length; i++) {
if(this.body[0][0] === this.body.slice(1)[i][0] && this.body[0][1] === this.body.slice(1)[i][1]) { snakeCollide = true; }
} return wallCollide || snakeCollide;
}
this.eat = function(appleEat) {
var head = this.body[0];
if(head[0] === appleEat.position[0] && head[1] === appleEat.position[1]) { return true; }
return false;
}
}
function apple(pos) {
this.position = pos;
this.draw = function() {
game.save();
game.fillStyle = '#3DAB92';
game.beginPath();
var radius = blockSize/2;
var x = this.position[0]*blockSize+radius;
var y = this.position[1]*blockSize+radius;
game.arc(x, y, radius, 0, Math.PI*2, true);
game.fill();
game.restore();
}
this.setNewPos = function() {
var newX = Math.round(Math.random()*(widthInBlocks-1));
var newY = Math.round(Math.random()*(heightInBlocks-1));
this.position = [newX, newY];
}
this.onSnake = function(checkSnake) {
var onSnake = false;
for(var i = 0; i < checkSnake.body.length; i++) {
if(this.position[0] === checkSnake.body[i][0] && this.position[1] === checkSnake.body[i][1]) { onSnake = true; }
} return onSnake;
}
}
document.onkeydown = function handleKey(e) {
var key = e.keyCode;
var newDirect;
switch(key) {
case 27: document.location.href = './'; break;
//case 32: restat(); break;
case 32: document.location.href = './?player='+window.player['name']+'&score='+window.player['score']; break;
case 37: newDirect = 'left'; break;
case 38: newDirect = 'down'; break;
case 39: newDirect = 'right'; break;
case 40: newDirect = 'up'; break;
default: return;
}
snakee.setDirect(newDirect);
}
init();
}
function snake(x) {
switch(x) {
case 0: document.location.hash = "#easy"; document.location.reload(); break;
case 1: document.location.hash = "#hardcore"; document.location.reload(); break;
default: console.log('snake() --- HELP COMMAND\nsnake(0) --- EASY MOD\nsnake(1) --- HARDCORE MOD'); break;
} return;
}
/******
* END *
******/