Java-lập trình đua xe

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TRNG I HC BCH KHOA H NI KHOA IN T VIN THNG

BO CO BI TP LN LP TRNH JAVA

ti : Thit k game ua xe

Ging vin hng dn : TS. Phm Huy Hong

Sinh vin thc hin : Phm Duy Kin 20111726

Trn Mnh Ton 20112344

H Ni, 5-2015

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Contents I. M t bi ton v phng hng gii quyt bi ton. ........................................................ 4

1. M t bi ton. ............................................................................................................ 4

2. Phng hng gii quyt bi ton ................................................................................. 5

II. Cc lp ca chng trnh .................................................................................................. 7 1. Lp Car .......................................................................................................................... 7

2. Lp Transport ................................................................................................................ 7

3. Lp ScreenManager....................................................................................................... 8

4. Lp RacingCar............................................................................................................... 8

5. Lp ReadWriteFile ........................................................................................................ 9

6. Lp ResourceManager................................................................................................. 10

7. Lp Rival ..................................................................................................................... 10

8. Lp StartGame............................................................................................................. 10

9. Lp TileMap ................................................................................................................ 11

10. Lp TileMapRenderer ............................................................................................... 12

11. Lp PowerUp............................................................................................................. 12

12. Lp Player.................................................................................................................. 12

13. Lp Obstacle .............................................................................................................. 12

14. Lp NullRepaintManager .......................................................................................... 12

15. Lp GameCore .......................................................................................................... 13

16. Lp GameAction ....................................................................................................... 13

17. Lp InputManager ..................................................................................................... 14

III. Xy dng chng trnh .................................................................................................. 15

1. Khi to tr chi. ......................................................................................................... 15

2. Bt u tr chi............................................................................................................ 21

IV. Ti liu tham kho ......................................................................................................... 32

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I. M t bi ton v phng hng gii quyt bi ton.

Lp trnh phn mm tr chi ua t vi cc yu cu:

1: S dng k thut lp trnh hng i tng

2: C cc xe i th cnh tranh trn ng ua

3: Cc chng ngi vt

4: Khi ngi chi t ti im s quy nh s t ng nng mc

kh ca tr chi

5: Cho php ngi chi ghi li s im t c.

1. M t bi ton.

Game ua xe t trn my tnh cng cn phi c:

- Khi to tr chi: l mt Frame cho php ngi chi bit mt s thng

tin cn thit, cc thc iu khin tr chi.

- Ngi iu khin xe ua: ngi chi s dng my tnh iu khin

xe.

- ng ua: ni cc xe tham gia ua. Trn ng ua gm c xe ca

ngi chi, xe ca cc i th, cc chng ngi vt m nhng ngi tham gia

ua xe cn phi vt qua.

- Va h: l nhng ro cn bn ngoi, n c nhim v gii hn cc xe ch

c php i trn v tr lng ng quy nh, khng c php vt ra ngoi

phm vi ny

- Chng ngi vt: mt iu khng th thiu khi ni n tr chi ua xe

t. Ngoi xe ca ngi chi cn c xe ca nhng i th cng tham gia tr

chi, cc chng ngi vt trn ng, nu nhng xe tham gia giao thng gp

nhau s gy ra va chm v xe ca ngi chi khng th i thng tip.

- im s v tn ngi chi: tp tin Score.txt v NamePlayer.txt trn

my tnh cho php ngi chi lu li tn ca mnh khi ngi chi t ti mt

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im s nht nh. C th c nhiu ngi chi t c yu cu nn cn phi

c mt danh sch lu li im v ngi chi. Mi ngi chi cng vi im s

tng ng s c lu trn mt dng vn bn duy nht.

- Mc kh ca tr chi: vi bi ton ny, do c yu cu t ng nng

mc kh ca tr chi nn bi cnh ca ng ua xe thay i ty theo cc

mc kh ca tr chi.

2. Phng hng gii quyt bi ton

Trn c s phn tch bi ton, da trn kiu lp trnh hng i tng,

chng em bt tay vo xy dng nhng lp, nhng thuc tnh, nhng phng

thc tng ng vi khi phn tch bi ton

- Khi to tr chi: cho php ngi chi khi to tr chi mi, cn

xy dng mt Frame ring, p ng mt cch tt nht nhng tr gip cho ngi

chi mi ln u s dng.

- Ngi chi: ci m ngi chi nhn thy ch l giao din b ngoi ca

chng trnh, mun ngi chi cm thy hng th khi chi ngoi tnh nng c

bit, trc tin ta cn phi th hin mt giao din mn hnh a nhn, khng qu

cu k, qu phc tp gy ri mt nhng cng khng c qu s sai, n iu

d gy nhn chn cho ngi chi.

- ng ua v va h: to ra ng ua v va h trong chng trnh

ny load file c tn l map1.txt, map2.txt, map3.txt. t th mc map,

tng ng vi mi mc kh d ca tr chi l mt tp tin mapx.txt khc

nhau. Khi c nhng tp tin , da trn nhng k t c trong tp tin, chng

trnh s nhn inh k t no tng ng vi ln ng ua, k t no tng ng

vi va h, k t no tng ng vi v tr khi to tr chi, k t no tng ng

vi cc i th ua cng ngi chi, k t no v tr no s l cc chng ngi

vt gy cn tr cho ngi chi, k t no th hin v tr kt thc mt mc ca

tr chi bc sang mc chi mi.

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- Xe t: trong chng trnh ny, phng tin tham gia giao thng ch c

duy nht l xe t. Nhng t ny l nhng file nh c load t th muc

images. nh khc nhau s tng ng cho nhng xe khc nhau, ring xe ca

ngi chi l duy nht, cn nhng xe i th l nhng xe ring, nhng phng

tin hay l nhng chng ngi vt cng l nhng file nh khc phn bit

chng vi nhng xe khc cng tham gia.

- Lu im s v tn ca ngi chi: trong chng trnh ny s dng tp

tin c tn l Score.txt lu tn ca nhng ngi chi v file NamePlayer.txt

lu tn ngi chi khi khi to .

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II. Cc lp ca chng trnh

xy dng ln c game ua xe t chng em xy dng 17 lp.

1. Lp Car

Lp Car k tha t lp Transport

2. Lp Transport

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3. Lp ScreenManager

4. Lp RacingCar

Lp RacingCar k tha t lp GameCore

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5. Lp ReadWriteFile

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6. Lp ResourceManager

7. Lp Rival

Lp Rival k tha t lp Car

8. Lp StartGame

Lp StartGame k tha t lp GameCore v lng nghe s kin

ActionListener

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9. Lp TileMap

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10. Lp TileMapRenderer

11. Lp PowerUp

Lp PowerUp k tha t lp Transport

12. Lp Player

Lp Player k tha t lp Car

13. Lp Obstacle

Lp Obstacle k tha t lp Car

14. Lp NullRepaintManager

Lp NullRepaintManager k tha t lp RepaintManager

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15. Lp GameCore

Lp GameCore k tha t lp JFrame

16. Lp GameAction

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17. Lp InputManager

Lp InputManager lng nghe cc s kin KeyListener, MouseListener,

MouseMotionListener v MouseWheelListener

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III. Xy dng chng trnh

1. Khi to tr chi.

Lp StartGame l lp dng khi to ch tri. Lp ny c giao din

ha d dng s dng. giao din ha ny ngi chi bit bit c cch

thc iu khin xe, tn nhng ngi chi chi trc v hon thnh tr

choi, thng tin v tc gi. Ngi chi c th khi to tr chi mi vi tn c

ng k do ngi dng t t. Giao in bng ting Vit, ch vi ln click chut

l ngi chi c th t mnh tham gia tr chi.

c c giao din v thc hin nhng hnh ng lp StartGame

k tha t lp GameCore v lng nghe s kin ActionListener.

public ScreenManager() {

GraphicsEnvironment environment =

GraphicsEnvironment.getLocalGraphicsEnvironment();

device = environment.getDefaultScreenDevice();

}

Lp ScreenManager s ly cc thit b ha trn mt mi trng tng

ng vi tng my tnh khc nhau. Vi mi mt my tnh khc nhau n s c

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mi trng hc khc nhau. Trnh bin dch ca Java s nh x sang tng

my n tr v mi trng c th.

Phng thc init() trong lp ScreenManager c gi s khi tao ra mt

ca s giao din m hnh. N s ly phn gii c th ca tng my sau s

tr v mt giao din y mn hnh trn tng my

public void init()

{

screen = new ScreenManager();

DisplayMode displayMode =

screen.findFirstCompatibleMode(POSSIBLE_MODES);

screen.setFullScreen(displayMode);

Window window = screen.getFullScreenWindow();

window.setFont(new Font("Dialog", Font.PLAIN, FONT_SIZE));

window.setBackground(Color.blue);

window.setForeground(Color.white);

isRunning = true;

}

Sau khi ly c quyn iu khin cc thit b ha trn my tnh,

phng thc gameLoop() s c gi. Phng thc ny c nhim v load cc

file nh, cp nht lin tc mn hnh cho ngi dng c cm gic nh khng

c s thay i g khc bit. Graphics2D s tr v gi tr thng qua lp

ScreenManager, n s ly ha v hin th ton mn hnh. Phng thc

gameLoop() s thc hin lin tc v c qun l thng qua thuc tnh

isRunning, n ch dng sau khi bin isRunning ny c gn gi tr false.

public void gameLoop()

{

long startTime = System.currentTimeMillis();

long currTime = startTime;

while (isRunning) {

long elapsedTime = System.currentTimeMillis() - currTime;

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currTime += elapsedTime;

update(elapsedTime);

Graphics2D g = screen.getGraphics();

draw(g);

g.dispose();

screen.update();

}

}

Phng thc install() trong lp NullRepaintManager k tha t lp

RepaintManager s ct b nhng mu d tha khng cn thit trong khi ngi

dng di chuyn chut ti nhng Button. Thay vo n s thay th bng hnh

nh nn ca n.

public static void install() {

RepaintManager repaintManager = new NullRepaintManager();

repaintManager.setDoubleBufferingEnabled(false);

RepaintManager.setCurrentManager(repaintManager);

}

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Nhng Button s c to bng cch ly mt file nh t folder images

tng ng khi ta truyn vo cho, khi ngi dng di chuyn chut, n chut, nh

chut th Button ny cng thay i mu sc. File nh c tao s ch ly phn

nh c mu, cn nhng phn khng c mu n s c cp nht bng nh ca

nn mn hnh.

public JButton createButton(String name, String toolTip) {

String imagePath = "images/" + name + ".png";

ImageIcon iconRollover = new ImageIcon(imagePath);

int w = iconRollover.getIconWidth();

int h = iconRollover.getIconHeight();

Cursor cursor =

Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);

Image image = screen.createCompatibleImage(w, h,

Transparency.TRANSLUCENT);

Graphics2D g = (Graphics2D)image.getGraphics();

Composite alpha = AlphaComposite.getInstance(

AlphaComposite.SRC_OVER, .5f);

g.setComposite(alpha);

g.drawImage(iconRollover.getImage(), 0, 0, null);

g.dispose();

ImageIcon iconDefault = new ImageIcon(image);

image = screen.createCompatibleImage(w, h,

Transparency.TRANSLUCENT);

g = (Graphics2D)image.getGraphics();

g.drawImage(iconRollover.getImage(), 2, 2, null);

g.dispose();

ImageIcon iconPressed = new ImageIcon(image);

JButton button = new JButton();

button.addActionListener(this);

button.setIgnoreRepaint(true);

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button.setFocusable(false);

button.setToolTipText(toolTip);

button.setBorder(null);

button.setContentAreaFilled(false);

button.setCursor(cursor);

button.setIcon(iconDefault);

button.setRolloverIcon(iconRollover);

button.setPressedIcon(iconPressed);

return button;

}

Cc Button s c sp xp theo kiu GridLayount

contentPane.setLayout(new GridLayout(3,3));

Lp ScreenManager s lng nghe cc s kin khi ngi chi click chut

vo cc Button. Ban u cc Frame c khi to v gn nh cho n trng

thi n dialog.setVisible(false). Khi ngi chi click chut vo mt Button no

th ngay lp tc Frame tng ng vi vi s kin c t trng thi hin.

Trong khi , cc Button cn li s c thit lp trng thi Enabled v hiu

ha n, ngi chi ch c th s dng cc Button khi hon thnh xong cc

thao tc tng ng.

if (src == quitButton) {

System.exit(0);

}

else if (src == configButton) {

boolean enable = ! quitButton.isEnabled();

aboutButton.setEnabled(enable);

highScoreButton.setEnabled(enable);

quitButton.setEnabled(enable);

newGameButton.setEnabled(enable);

dialogInstruction.setVisible(!enable);

}

Danh sch tn ca nhng ngi ang chi trc v hon thnh c tr

chi s c lu trong mt file c tn l Score.txt. Lp ReadWriteFile s c

thng tin t file vo tr v mt chui gm ni dung cha ng trong .

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Ngn cch gia tn ca cc ngi chi l mt v bin j m s dng

trn file (tc l danh sch ngi chi hin c) trnh by giao din d nhn

hn trong khi ngi chi xem danh sch ngi chi trc h.

public String highScore()

{

readHighScore();

String str = " \u0110i\u1ec3m cao :";

int j = 0;

for(int i = 0; i < arrScore.size(); i++)

str += "" + ++j + " : " + arrScore.get(i);

return str;

}

Trong nhng Button c xy dng, ngoi mt Button dng khi

to tr chi mi l nhng Button c tnh nng xem thng tin nh thnh vin

nhm thc hin, cch s dng tr chi, thot, danh sch ngi chi. Khi c

gi, cc Frame tng ng s c hin ra. Khi ngi chi chn khi to tr

chi mi, sau khi nhp tn ngi chi xong s bt u load tr chi. Lp

RacingCar s c gi.

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2. Bt u tr chi.

Lp Transport c khi to s truyn vo mt bin c kiu d liu l

image. nh c truyn vo chnh l i din cho phng tin giao thng c

trong ng ua xe m ngi chi s thy xut hin trn mn hnh. Lp

Transport c cc phng thc nh: update(long elapsedTime), getX(), getY(),

setX(float x), setY(float y), getWidth(), getHeight() setVelocityX(float dx),

setVelocityY(float dy), getImage(), clone()... S dng ly cc ta , tc

v gn ta , tc cho phng tin giao thng . Ring phng thc

update(long elapsedTime) s cp nht li ta ca phng tin giao thng

theo mt khong thi gian

public void update(long elapsedTime)

{

x += dx * elapsedTime;

y += dy * elapsedTime;

}

Lp Car l mt lp tru tng, n c k tha t lp Transport, ngoi

mt s phng thc nh c ca lp Transport n cn c b xung thm

nhng phng thc ring bit dnh ring cho n nh: collideVertical(),

collideHorizontal(), getMaxSpeed()

Lp Rival v lp Obstacle kt tha t lp Car. Lp Rival, phng thc

getMaxSpeed() s thit lp tc ti a cho cc xe l i th ca ngi chi,

trong khi phng thc ny lp Obstacle s thit lp tc di truyn ca

nhng chng ngi vt trn ng.

private TileMap loadMap(String filename) throws IOException

{

ArrayList lines = new ArrayList();

int width = 0;

int height = 0;

int xstart = 0;

int ystart = 0;

BufferedReader reader = new BufferedReader(new FileReader(filename));

while (true) {

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String line = reader.readLine();

if (line == null) {

reader.close();

break;

}

if (!line.startsWith("#")) {

lines.add(line);

height = Math.max(height, line.length());

}

}

width = lines.size();

TileMap newMap = new TileMap(width, height);

for (int x=0; x

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}

}

}

Transport playerTransport = (Transport)player.clone();

playerTransport.setX(TileMapRenderer.tilesToPixels(xstart) +

(TileMapRenderer.tilesToPixels(1) -

playerTransport.getWidth()) / 2);

playerTransport.setY(TileMapRenderer.tilesToPixels(ystart + 1) -

playerTransport.getHeight());

newMap.setPlayer(playerTransport);

return newMap;

}

Phng thc loadMap() ca lp ResourceManager s tr v mt

TileMap. Khi c truyn vo mt i s, tham s ny chnh l tn ca tp tin

l bn ng i khi iu khin xe. Da trn s truyn vo l mt chui,

chng trnh s tm v c nhng dng c ni dung bt u khng phi l #

(nhng dng ch bt u bng # dng ghi ch thch cho tp tin ). Chiu

di ca ng ua chnh l chiu di ca dng c nhiu k t nht, chiu rng

ca ng ua li l s dng tm c trong tp tin . Cn c vo tp tin m

n tm thy chng trnh s c tng k t, nu trong tp tin c k t s tc l

n tm thy v tr xut pht ca xe c ngi chi iu khin, cn k t A,

B l hai bn va h ca ng ua, k t 1, 2 l v tr xut pht ca nhng

i th ua cng ngi chi, cc k t o, O l nhng chng ngi vt xut

hin trn ng ua, n s gy cn tr n tc ca cc xe ua, cn c k t

*, nu xe ca ngi chi t ti v tr ca * ny ng ngha vi vic xe

di chuyn n ch. Tng ng vi mi k t v nhng bc nh th hin i

tng c t vo bn giao din.

Cng trong lp ny, khi ngi chi t ti v tr c gi l ch th

phng thc loadNextMap() c gi. Phng thc ny s tng bin ton c

currentMap() ln thm 1 trc khi n gi n phng thc loadMap(), bin

currentMap() chnh l bin qun lc mc ca ngi chi.

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Trong trng hp ngi chi di chi qua tt c cc mc ca tr

ch, mt bin c tn l resuft c gn gi tr true, ng thi gi tr ca

currentMap c gn l 0, n li quai v gi tr ban u.

TileMap l lp dng thit lp bn , tc l chiu di v chiu rng

ca ng ua. Thng qua hai bin height v width chng ta c th bit c

nhng thng s ca bn . Nhng xe phng tin giao thng v xe ca ngi

chi cng c th hin.

public void draw(Graphics2D g, TileMap map, int screenWidth, int screenHeight)

{ Transport player = map.getPlayer();

int mapHeight = tilesToPixels(map.getHeight()); int offsetY = screenHeight / 2 - Math.round(player.getY()) - TILE_SIZE;

offsetY = Math.min(offsetY, 0); offsetY = Math.max(offsetY, screenHeight - mapHeight);

int offsetX = screenWidth - tilesToPixels(map.getWidth());

if (background == null || screenHeight > background.getHeight(null)) {

g.setColor(Color.gray); g.fillRect(0, 0, screenWidth, screenHeight); }

if (background != null) {

int y = offsetY * (screenHeight - background.getHeight(null)) / (screenHeight - mapHeight);

int x = screenWidth - background.getWidth(null); g.drawImage(background, x, y, null);

} int firstTileY = pixelsToTiles(-offsetY); int lastTileY = firstTileY +

pixelsToTiles(screenHeight) + 1; for (int x = 0; x < map.getWidth(); x++) {

for (int y = firstTileY; y

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// draw player g.drawImage(player.getImage(), Math.round(player.getX()) + offsetX,

Math.round(player.getY()) + offsetY, null);

// draw Cars Iterator i = map.getTransport(); while (i.hasNext()) {

Transport transport = (Transport)i.next(); int x = Math.round(transport.getX()) + offsetX;

int y = Math.round(transport.getY()) + offsetY; g.drawImage(transport.getImage(), x, y, null); if (transport instanceof Car &&

x >= 0 && x < screenWidth) {

((Car)transport).wakeUp(); } }

}

Phng thc draw() ca lp TileMapRenderer s cp nht lin tc mn

hnh. Khi xe t ca ngi chi di chuyn th mn hnh cng dich chuyn theo

v cp nht v tr ca cc xe khc c trn ng ua.

Lp InputManager lng nghe cc s kin KeyListener, MouseListener,

MouseMotionListener v MouseWheelListener. Lp c phng thc

setCursor() c nhim v kha con tr, chng ta s khng th di chuyn chut

trong qu trnh s dng tr chi.

public void setCursor(Cursor cursor) {

comp.setCursor(cursor);

}

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Lun lng nghe s kin c lin quan n bn phm nh n, nh mt hay nhiu

phm khc nhau. Mi mt phm c n hay nh u c kim tra v n thit

lp phng thc press() v ralease() ca lp GameAction

public void keyPressed(KeyEvent e) { GameAction gameAction = getKeyAction(e);

if (gameAction != null) { gameAction.press(); }

e.consume(); }

public void keyReleased(KeyEvent e) {

GameAction gameAction = getKeyAction(e); if (gameAction != null) {

gameAction.release(); } e.consume();

}

Phng thc checkInput() kim tra lin tc cc s kin nhp t bn phm

thng qua lp InputManager. Khi cc phm c lin quan c n th ta hay

l v tr ca xe c thay i theo bng cch thit lp mt tc cho xe ca

ngi chi.

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private void checkInput(long elapsedTime) {

if (exit.isPressed()) { stop();

} Player player = (Player)map.getPlayer();

{ float velocityX = 0;

float velocityY = 0; if (moveLeft.isPressed()) { velocityX-=player.getMaxSpeed();

} if (moveRight.isPressed()) {

velocityX+=player.getMaxSpeed(); } if (moveForward.isPressed()) {

velocityY-=player.getMaxSpeed(); }

if (moveBack.isPressed()) { velocityY+=player.getMaxSpeed(); }

player.setVelocityX(velocityX); player.setVelocityY(velocityY);

} }

Phng thc update() c nhim v cp nht v thay i v tr ca cc xe,

bi cnh trong chng trnh bng cch gi li cc hm tng ng vi nhng

nhim .

public void update(long elapsedTime) {

Car player = (Car)map.getPlayer();

checkInput(elapsedTime);

updateTransport(player, elapsedTime); player.update(elapsedTime);

Iterator i = map.getTransport(); while (i.hasNext()) {

Transport transport = (Transport)i.next(); if (transport instanceof Car) {

Car car = (Car)transport; updateTransport(car, elapsedTime); }

transport.update(elapsedTime); }

}

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Phng thc s qun l ta cc xe l i th ca ngi chi v cc xe

c trn ng ua m ngi chi ang iu khin xe.

private void updateTransport(Car car, long elapsedTime) {

// change x float dx = car.getVelocityX();

float oldX = car.getX(); float newX = oldX + dx * elapsedTime; Point tile =

getTileCollision(car, newX, car.getY()); if (tile == null) {

car.setX(newX); } else {

if (dx > 0) { car.setX(

TileMapRenderer.tilesToPixels(tile.x) - car.getWidth()); }

else if (dx < 0) { car.setX(

TileMapRenderer.tilesToPixels(tile.x + 1)); } car.collideHorizontal();

} if (car instanceof Player) {

checkPlayerCollision((Player)car); } // change y

float dy = car.getVelocityY(); float oldY = car.getY();

float newY = oldY + dy * elapsedTime; tile = getTileCollision(car, car.getX(), newY); if (tile == null) {

car.setY(newY); }

else { if (dy > 0) { car.setY(

TileMapRenderer.tilesToPixels(tile.y) - car.getHeight());

} else if (dy < 0) { car.setY(

TileMapRenderer.tilesToPixels(tile.y + 1)); }

car.collideVertical(); } if (car instanceof Player) {

checkPlayerCollision((Player)car); }

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}

Phng thc getTileCollision() s chuyn i ta ca TileMap thnh

ta ca mn hnh

public Point getTileCollision(Transport transport,

float newX, float newY) {

float fromX = Math.min(transport.getX(), newX); float fromY = Math.min(transport.getY(), newY); float toX = Math.max(transport.getX(), newX);

float toY = Math.max(transport.getY(), newY);

int fromTileX = TileMapRenderer.pixelsToTiles(fromX); int fromTileY = TileMapRenderer.pixelsToTiles(fromY);

int toTileX = TileMapRenderer.pixelsToTiles( toX + transport.getWidth() - 1);

int toTileY = TileMapRenderer.pixelsToTiles( toY + transport.getHeight() - 1);

for (int y = fromTileY; y = map.getWidth() ||

map.getTile(x, y) != null) {

pointCache.setLocation(x, y); return pointCache; }

} }

return null; }

Hin th thi gian tnh t khi bt u tr chi n thi im hin ti, mc

m ngi chi ang chi v in ra mn hnh thng bo ngi chi bit.

N cng qun l v cho bit ngi chi t yu cu chuyn sang mc

chi mi cha. Nu ngi chi v n ch qu thi gian yu cu th mc

vn gi nguyn hin ti v bn s load li tp tin ng vi mc chi .

private void drawControl(Graphics2D g) {

g.drawImage(resourceManager.loadImage("10.png"), 0 , 0, null); g.setColor(Color.BLUE); g.drawString("Time : " + String.valueOf(System.currentTimeMillis() - timeStart),

10, 30); g.drawString("Level : " + String.valueOf(resourceManager.getCurrentMap()), 10,

80);

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if(resourceManager.IsResuft()) g.drawString(" You complete the game ", 10, screen.getHeight()/2);

}

Cc chng ngi vt xut hin ngu nhin lm cn tr n tc xe ca

ngi chi, phng checkPlayerCollision() s lm iu ny

public void checkPlayerCollision(Player player) {

Transport collisionTransport = getTransportCollision(player);

if (collisionTransport instanceof PowerUp) { acquirePowerUp((PowerUp)collisionTransport);

} else if (collisionTransport instanceof Car) {

Transport transport = (Transport)collisionTransport; if(transport.getY() < player.getY())

{ player.setY(transport.getY() + player.getHeight());

} else if(transport.getY() > player.getY()) {

transport.setY(player.getY() + transport.getHeight()); }

else if(transport.getX() > player.getX()) { player.setX(transport.getX() - player.getWidth());

} else if(transport.getX() < player.getX())

{ player.setX(transport.getX() + player.getWidth()); }

}

}

Khi gp cc chng ngi, nu chng ngi vt m l ci ch n th

n s gi n phng thc acquirePowerUp(), phng thc ny s t ng

chuyn bn mi, hay ng ua mi. Nhng lm iu thnh cng th

n kim tra xem thi gian v ch ca ngi chi c t yu cu khng, nu

t ti yu cu v thi gian th n s t ng nng bi, cn trong trng hp

ngc li chng trnh s khng nng bi mi m thay vo chng trnh s

load li ng ua m ngi chi va cha hon thnh mc tiu.

public void acquirePowerUp(PowerUp powerUp) {

30

map.removeTransport(powerUp);

else if (powerUp instanceof PowerUp.Goal) {

if(System.currentTimeMillis() - timeStart < 40000) {

map = resourceManager.loadNextMap(); timeStart = System.currentTimeMillis();

} else {

map = resourceManager.reloadMap(); timeStart = System.currentTimeMillis();

} if(resourceManager.getCurrentMap() == 3 && !rwf.isScore(name))

rwf.writeFileScore(name);

} } Bng cch kim tra phng thc IsResuft() ca lp ResourceManager

lin tc. Khi quan ht cc mc ca tr chi, th s in ra mn hnh dng thng

bo You complete the game!

public boolean IsResuft() {

return resuft; }

public int getCurrentMap() {

return currentMap; }

31

IV. Kt lun

Trong thi gian thc hin bi tp ln, nh s ch bo ca thy Trn Huy Hong v s gip ca cc bn trong lp, nhm chng em thu c nhiu kt qu trong vic hc lp trnh Java. Do thi gian v kh nng c hn nn bi tp ln ca nhm chng em cn rt nhiu thiu st, chng em rt mong nhn c s gp , gip ca thy v cc bn bi tp ca chng em c hon thin hn