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race-game.js
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(function(){
const width = 60;
const height = 45;
var map = [
[1,1,1,1,1,1,0,0,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,0,0,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1,1,1],
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
[0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0],
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
[1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1],
[0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0],
[1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,1,0,0,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1],
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
];
class Random{
static get(inicio,final){
return Math.floor(Math.random() * final) + inicio;
}
}
class Food{
constructor(pos){
this.pos = pos;
this.timeLife = -1;
this.draw();
}
generateNewPos(){
this.pos.x = Random.get(0,width);
this.pos.y = Random.get(0,height);
}
draw(){
contexto.fillRect(this.pos.x*10,this.pos.y*10,10,10);
}
getPos(){
if(typeof this.pos !== 'undefined'){
return this.pos;
}
return null;
}
}
class Posicion{
constructor(x,y){
this.x = x;
this.y = y;
}
equals(pos){
if(this.x===pos.x && this.y===pos.y){
return true;
}
return false;
}
}
class Square{
constructor(pos){
this.pos = pos;
this.back = null;
this.vel = 1;
this.draw();
}
draw(){
contexto.fillRect(this.pos.x*10,this.pos.y*10,10,10);
if(this.hasBack()){
this.back.draw();
}
}
up(){
this.copy();
this.pos.y -= this.vel;
}
down(){
this.copy();
this.pos.y += this.vel;
}
left(){
this.copy();
this.pos.x -= this.vel;
}
right(){
this.copy();
this.pos.x += this.vel;
}
getPos(){
if(typeof this.pos !== 'undefined'){
return this.pos;
}
return null;
}
hasBack(){
if(this.back===null){
return false;
}
return true;
}
addBack(){
if(this.hasBack()){
this.back.addBack();
}else{
this.back = new Square(this.makePosCopy(this.pos));
}
}
removeLastBack(){
if(this.back.hasBack()){
this.back.removeLastBack()
}else{
this.back = null;
}
}
copy(){
if(this.hasBack()){
this.back.copy();
this.back.pos = this.makePosCopy(this.pos);
}
}
upVel(){
this.vel++;
if(this.hasBack()){
this.back.upVel();
}
}
downVel(){
this.vel--;
if(this.hasBack()){
this.back.downVel();
}
}
makePosCopy(pos){
return new Posicion(pos.x,pos.y);
}
colission(pos){
if(this.pos.equals(pos)){
return true
}
else{
if(this.hasBack()){
return this.back.colission(pos);
}
else{
return false;
}
}
}
}
class Snake{
constructor(){
this.head = new Square(new Posicion(10,3));
this.draw();
this.direction = "right";
}
addSquare(){
this.head.addBack();
}
subSquare(){
this.head.removeLastBack();
}
draw(){
if(typeof this.head !== 'undefined'){
this.head.draw();
}
}
up(){
this.direction = "up";
}
down(){
this.direction = "down";
}
left(){
this.direction = "left";
}
right(){
this.direction = "right";
}
move(){
switch(this.direction){
case "up":
this.head.up();
break;
case "down":
this.head.down();
break;
case "left":
this.head.left();
break;
case "right":
this.head.right();
break;
}
}
getHead(){
if(typeof this.head !== 'undefined'){
return this.head;
}
return null;
}
upgradeVel(){
this.head.upVel();
}
verifySelfColision(){
if(this.head.hasBack()){
return this.head.back.colission(this.head.getPos());
}
return false;
}
}
class Game{
constructor(){
this.initLong = 3;
this.snake = new Snake();
this.food = new Food(new Posicion(Random.get(0,width),Random.get(0,height)));
this.isPaused = false;
this.draw();
this.initSnake();
}
initSnake(){
for(var i=0;i<this.initLong;i++){
this.snake.addSquare();
}
}
draw(){
if(typeof this.snake !== 'undefined')
this.snake.draw();
if(typeof this.food !== 'undefined')
this.food.draw();
}
pauseGame(){
this.isPaused = !this.isPaused;
}
gameLogic(){
if(!this.isPaused){
this.snake.move();
if(this.snake.getHead().getPos().equals(this.food.getPos())){
this.snake.addSquare();
this.food.generateNewPos();
}
if(
this.snake.getHead().getPos().x>width ||
this.snake.getHead().getPos().y>height ||
this.snake.getHead().getPos().x< 0 ||
this.snake.getHead().getPos().y< 0 ||
this.snake.verifySelfColision()
){
this.snake = null;
this.snake = new Snake();
this.initSnake()
this.isPaused = true;
}
}
//preguntar por la colision consigo misma
}
}
const canvas = document.getElementById('lienzo');
const contexto = canvas.getContext('2d');
const game = new Game();
window.addEventListener("keydown",function(event){
//console.log(event.keyCode)
switch(event.keyCode){
case 65:
game.snake.left();
break;
case 68:
game.snake.right();
break;
case 87:
game.snake.up();
break;
case 83:
game.snake.down();
break;
case 32:
game.pauseGame();
break;
}
});
setInterval(function(){
contexto.clearRect(0,0,canvas.width,canvas.height);
game.gameLogic();
game.draw();
},1000/5);
})();