var road = createSprite('road.png'); //柏油路背景

var check1 = createSprite('check.png'); //檢查點1

var check2 = createSprite('check.png'); //檢查點2

var border = createSprite('border.png'); //道路邊界

var car = createSprite('car.png'); //車子

var dashboard = createSprite('dashboard.png'); //儀表板

var resultBoard = createSprite('result.png'); //成績顯示版

var miniRoad = createSprite('road.png'); //迷你地圖

var miniCar = createSprite('car.png'); //迷你車

check1.moveTo(600, 400);

check2.moveTo(600, -1750);

miniRoad.moveTo(1000, 700);

miniCar.moveTo(1000, 700);

miniCar.scale = 1/2; //縮小車子

miniRoad.scale = 1/15; //縮小地圖

miniRoad.opacity = 0.6; //迷你地圖半透明

resultBoard.hidden = true; //預設隱藏成績顯示版

var speed = 0; //車速

var startTime = Date.now(); //開始時間

var round = 1; //圈數

var isChecked = false; //是否經過檢查點2

var timer = 0; //計時器

var t1; //第1圈秒數

var t2; //第2圈秒數

var t3; //第3圈秒數

createSound('bgm.mp3', true);

var engineSound = createSound('engine.mp3', true);

forever(loop); //重複不斷執行遊戲迴圈

//遊戲主迴圈

function loop () {

timer = (Date.now() - startTime)/1000;

print(Math.floor(speed*10) + ' km/h', 80, 80, 'white', 40);

print(round + '/3', 350, 80, 'black', 40);

print(timer + 's', 1000, 80, 'white', 40);

engineSound.setVolume(speed/10); //根據速度調整引擎聲音

border.direction = car.direction - 180;

border.stepForward(speed);

road.direction = car.direction - 180;

road.stepForward(speed);

check1.direction = car.direction - 180;

check1.stepForward(speed);

check2.direction = car.direction - 180;

check2.stepForward(speed);

if (key.right) {

car.direction += 2;

speed -= 0.2;

}

if (key.left) {

car.direction -= 2;

speed -= 0.2;

}

if (key.up) {

if (speed < 12) {

speed += 0.15;

}

} else {

speed -= 0.03;

}

if (key.down) {

if (speed > 0.6) {

speed -= 0.3;

}

}

if (car.touched(border)) {

// speed -= 0.3;

}

if (speed < 0.6) {

speed = 0.6;

}

if (car.touched(check1) && isChecked) {

startTime = Date.now();

if (round == 1) {

t1 = timer;

}

if (round == 2) {

t2 = timer;

}

if (round == 3) {

t3 = timer;

}

round += 1;

isChecked = false;

}

if (car.touched(check2)) {

isChecked = true;

}

//進入第四圈表示已經完成三圈，遊戲要結束並顯示成績

if (round == 4) {

resultBoard.hidden = false;

var avg = (t1 + t2 + t3) / 3;

drawText(t1 + 's', 550, 340, 'white', 30);

drawText(t2 + 's', 550, 410, 'white', 30);

drawText(t3 + 's', 550, 495, 'white', 30);

drawText(avg.toFixed(3) + 's', 550, 560, 'white', 30);

stop();

}

//迷你小地圖

miniCar.direction = car.direction;

miniCar.stepForward(speed/15);

}