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script.js
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script.js
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"use strict"
var music = document.getElementById("music")
var canvas = document.getElementById("tela")
canvas.addEventListener("click",onClick)
var ctx = canvas.getContext("2d")
const car ={
width : 30,
height : 15,
xPosition : 500,
yPosition : 100,
velocity : 0,
displayVelocity: 0,
forceFoward : 0,
forceBackward : 0,
facingAngle : 0,
isOnRoad: true,
isReversing : false
}
const road={
xPosition: 0,
yPosition:0,
width:0,
heigh:0
}
const baseForce = 0.06
const baseTurningSpeed = 4
const baseRoadAttrition = 0.99
const baseDirtAttrition = 0.94
const maxSpeedFront = 7.5
const maxSpeedBack = -3
const maxTurnSpeed = 3
const debugMode = false
var isInitialized = false
var musicOn = true;
var keyArray = []
var rocksOnGround = 200
var roadArray= []
var turnArray= []
requestAnimationFrame(draw)
function draw(){
musicControl()
processKeys()
checkCollision()
moveCar()
ctx.clearRect(0,0,canvas.clientWidth, canvas.height)
ctx.clientWidth = 2
drawRoads()
var xView = car.xPosition + car.width / 2;
var yView = car.yPosition + car.height / 2;
ctx.save()
ctx.translate(xView,yView)
ctx.rotate(car.facingAngle * Math.PI / 180)
drawCar()
ctx.restore();
ctx.font = "30px Arial"
ctx.fillText(car.displayVelocity+" km/h", 30, 650);
requestAnimationFrame(draw)
}
function checkCollision(){
var i
for(i=0; i<roadArray.length; i++){ //roadArray e turnArray devem possuir mesmo numero de integrantes
car.isOnRoad = RectsColliding(turnArray[i].x, turnArray[i].y, 60, 60)
if(car.isOnRoad){
return
}
}
for(i=0; i<turnArray.length; i++){
car.isOnRoad = RectsColliding(roadArray[i].x-8, roadArray[i].y-8, roadArray[i].w+15, roadArray[i].h+15);
if(car.isOnRoad){
return
}
}
}
function RectsColliding(x,y,w,h){
return !(car.xPosition>x+w || car.xPosition+car.width+5<x || car.yPosition>y+h || car.yPosition+car.height+10<y);
}
function drawRoads(){
if(roadArray<7){
roadArray.push({x:240, y:85, w:560, h:60}) //estrada 0
roadArray.push({x:800, y:145, w:60, h:150}) //estrada 1
roadArray.push({x:860, y:295, w:150, h:60}) //estrada 2
roadArray.push({x:1010, y:355, w:60, h:200}) //estrada 3
roadArray.push({x:400, y:555, w:610, h:60}) //estrada 4
roadArray.push({x:340, y:455, w:60, h:100}) //estrada 5
roadArray.push({x:240, y:395, w:100, h:60}) //estrada 6
roadArray.push({x:180, y:145, w:60, h:250}) //estrada 7
}
if(turnArray<7){
turnArray.push({x:roadArray[1].x, y:roadArray[0].y}) //curva 0
turnArray.push({x:roadArray[1].x, y:roadArray[2].y}) //curva 1
turnArray.push({x:roadArray[3].x, y:roadArray[2].y}) //curva 2
turnArray.push({x:roadArray[3].x, y:roadArray[4].y}) //curva 3
turnArray.push({x:roadArray[5].x, y:roadArray[4].y}) //curva 4
turnArray.push({x:roadArray[5].x, y:roadArray[6].y}) //curva 5
turnArray.push({x:roadArray[7].x, y:roadArray[6].y}) //curva 6
turnArray.push({x:roadArray[7].x, y:roadArray[0].y}) //curva 7
}
var i
for(i=0; i<roadArray.length; i++){ //road hitbox
ctx.fillStyle = "rgb(255, 255, 153)"
ctx.fillRect(turnArray[i].x, turnArray[i].y, 60, 60)
ctx.fillRect(roadArray[i].x-8, roadArray[i].y-8, roadArray[i].w+15, roadArray[i].h+15)
}
for(i=0; i<roadArray.length; i++){ //draw all roads
ctx.fillStyle = "rgb(0, 0, 0)"
ctx.fillRect(roadArray[i].x, roadArray[i].y, roadArray[i].w, roadArray[i].h)
}
//eita. Devia automatizar isso
ctx.beginPath();
ctx.moveTo(turnArray[0].x,turnArray[0].y) //curva 0
ctx.lineTo(roadArray[2].x, roadArray[1].y)
ctx.lineTo(roadArray[1].x, roadArray[1].y)
ctx.fill();
ctx.beginPath();
ctx.moveTo(turnArray[1].x, turnArray[1].y) //curva 1
ctx.lineTo(roadArray[2].x, roadArray[2].y)
ctx.lineTo(roadArray[2].x, roadArray[3].y)
ctx.fill();
ctx.beginPath();
ctx.moveTo(turnArray[2].x, turnArray[2].y) //curva 2
ctx.lineTo(roadArray[3].x, roadArray[3].y)
ctx.lineTo(roadArray[3].x+60, roadArray[3].y)
ctx.fill();
ctx.beginPath();
ctx.moveTo(roadArray[3].x+60, roadArray[4].y)
ctx.lineTo(turnArray[3].x, turnArray[3].y) //curva 3
ctx.lineTo(roadArray[3].x, roadArray[4].y+60)
ctx.fill();
ctx.beginPath();
ctx.moveTo(roadArray[4].x, roadArray[4].y+60)
ctx.lineTo(roadArray[4].x, roadArray[4].y)
ctx.lineTo(turnArray[4].x, turnArray[4].y) //curva 4
ctx.fill();
ctx.beginPath();
ctx.moveTo(roadArray[4].x, roadArray[5].y)
ctx.lineTo(roadArray[5].x, roadArray[5].y)
ctx.lineTo(turnArray[5].x, roadArray[6].y) //curva 5
ctx.fill();
ctx.beginPath();
ctx.moveTo(roadArray[6].x, roadArray[5].y)
ctx.lineTo(roadArray[6].x, roadArray[6].y)
ctx.lineTo(roadArray[7].x, roadArray[6].y) //curva 6
ctx.fill();
ctx.beginPath(); //curva 7
ctx.moveTo(roadArray[7].x, roadArray[7].y)
ctx.lineTo(roadArray[0].x, roadArray[7].y)
ctx.lineTo(roadArray[0].x, roadArray[0].y)
ctx.fill();
ctx.fillStyle = "rgb(0, 204, 0)"
ctx.fillRect(550, 65, 10, 100) //linha de chegada
}
function drawCar(){ //esse codigo precisa de rework
if(debugMode){
ctx.strokeStyle = "rgb(255, 0, 0)"
ctx.beginPath()
ctx.moveTo(0,0)
ctx.lineTo(40,0) //angulo
ctx.stroke()
}
//corpo
ctx.fillStyle = "rgb(204, 204, 204)"
ctx.fillRect(-car.width/2, -car.height/2, car.width ,car.height) //chassi
ctx.fillStyle = "rgb(140, 140, 140)"
ctx.fillRect(car.width/4.5, -car.height/2.6, car.height/1.8, car.height/1.3) //capo
ctx.fillRect(car.width/8, -car.height/1.5, car.width/20, car.width/10) //retrovisor
ctx.fillRect(car.width/8, car.height/2.1, car.width/20, car.width/10) //retrovisor
//vidro
ctx.fillStyle = "rgb(0, 0, 0)"
ctx.fillRect(-car.width/18, -car.height/3.5, car.height/1.8, car.height/1.7) //painel
ctx.fillRect(-car.width/2.5, -car.height/3.6, car.height/5, car.height/1.7) //traseiro
ctx.fillRect(-car.width/6, -car.height/2.2, car.width/4, car.height/10) //janelas
ctx.fillRect(-car.width/6, car.height/2.8, car.width/4, car.height/10) //janelas
ctx.fillRect(-car.width/3, -car.height/2.2, car.width/8, car.height/10) //janelas
ctx.fillRect(-car.width/3, car.height/2.8, car.width/8, car.height/10) //janelas
//farrois
ctx.fillStyle = "rgb(255, 255, 0)"
ctx.fillRect(car.width/2.15, -car.height/2, car.width/30, car.width/20) //amarelo dianteiro
ctx.fillRect(car.width/2.15, car.height/2.5, car.width/30, car.width/20) //amarelo dianteiro
ctx.fillRect(-car.width/2, -car.height/2, car.width/30, car.width/20) //amarelo traseiro
ctx.fillRect(-car.width/2, car.height/2.5, car.width/30, car.width/20) //amarelo traseiro
ctx.fillStyle = "rgb(255, 255, 255)"
ctx.fillRect(car.width/2.3, -car.height/2.6, car.width/15, car.width/10) //branco dianteiro
ctx.fillRect(car.width/2.3, car.height/5.5, car.width/15, car.width/10) // branco dianteiro
ctx.fillStyle = "rgb(255, 0, 0)"
ctx.fillRect(-car.width/2, -car.height/2.6, car.width/30, car.width/10) //vermelho traseiro
ctx.fillRect(-car.width/2, car.height/5.6, car.width/30, car.width/10) //vermelho traseiro
}
function moveCar(){
if(car.velocity != 0){
if(car.isOnRoad){
car.forceFoward *= baseRoadAttrition
car.forceBackward *= baseRoadAttrition
}
else{
car.forceFoward *= baseDirtAttrition
car.forceBackward *= baseDirtAttrition
}
}
car.velocity = (car.forceFoward - car.forceBackward).toFixed(3)
car.xPosition += car.velocity * Math.cos(car.facingAngle * Math.PI / 180);
car.yPosition += car.velocity * Math.sin(car.facingAngle * Math.PI / 180);
car.displayVelocity = Math.abs(Math.round(car.velocity*15))
}
function processKeys(){
if(keyArray["ArrowRight"]){
if(car.velocity != 0){
car.facingAngle += baseTurningSpeed
}
}
if(keyArray["ArrowLeft"]){
if(car.velocity != 0){
car.facingAngle -= baseTurningSpeed
music.muted = false;
}
}
if(keyArray["ArrowUp"]){
if(car.velocity < maxSpeedFront){
car.forceFoward += baseForce
music.muted = false;
}
}
if(keyArray["ArrowDown"]){
if(car.velocity > maxSpeedBack){
car.forceBackward += baseForce
music.muted = false;
}
}
}
function musicControl(){
if(!music.muted){
if(musicOn){
music.play()
}
else{
music.pause()
}
}
}
function onClick(){
music.muted = false;
}
document.onclick = function(evt){
music.muted = false;
}
document.onkeydown = function(evt){
keyArray[evt.key] = true
music.muted = false;
}
document.onkeyup = function (evt) {
keyArray[evt.key] = false;
}