2012 03-24-titanium plusquicktigame2d

Titanium＋QuickTiGame2dでのシューティングゲームのつくりかた

(How to create a shooting game w/ QuickTiGame2d)

Original Update byJacek.NL(http://www.flickr.com/photos/jacek_nl/)

12年3月24日土曜日

http://www.flickr.com/photos/jacek_nl/2569948109/


http://www.flickr.com/photos/jacek_nl/




Agenda

• my self-introduce (5min)

• How to create a shooting game w/ QuickTiGame2d (30min)

• Q&A (5min)


non-developer*Recruiter for Web developer/designer

my self-introduce


2 years experience:Windows + JScript1.5 years experience:Titanium Mobile

my self-introduce


this blog trigger for me to learn Titanium Mobile

my self-introduce


my self-introduce


h5y1m141 @


Intended audience

Original Update byJacek.NL(http://www.flickr.com/photos/thinkmedialabs/)








Easy to create a shooting game w/ QuickTiGame2d


What’s QuickTiGame2d？• Game engine for Titanium Mobile developed by Kota Iguchi

• latest version supports tiled map integration,Box2d physics... and so on.

• You can download it here(http://code.google.com/p/quicktigame2d/)

2011/12/28 2012/1/8


http://code.google.com/p/quicktigame2d/




Which QuickTiGame2d API is used in this sample application?

GameView Scene Sprite

Original Update by jcarbaughhttp://www.flickr.com/photos/jcarbaugh/

Original Update by John Krollhttp://www.flickr.com/photos/jkroll/ Original Update by Daves Portfolio

http://www.flickr.com/photos/daves_portfolio/


http://www.flickr.com/photos/jcarbaugh/

http://www.flickr.com/photos/jcarbaugh/

http://www.flickr.com/photos/jkroll/

http://www.flickr.com/photos/jkroll/



Ti.UI.Window

‘onload’ event :

‘enterFrame’ event:

GameViewScene Sprite

-initiazlie & game start

-redraw all sprites-check if enemies and bullets intersect

Each QuickTiGame2d API overview

‘touchmove’ event :-move tank to the left or right


ここから3つのステップに分けて作り方解説します

Original Update byjeezny(http://www.flickr.com/photos/jeezny/)


http://www.flickr.com/photos/lizhenry/2051224366/sizes/o/




STEP1:背景と自機配置

STEP2:弾道と敵機を配置

STEP3:弾道＆敵機を動かす


source code at Gist(https://

gist.github.com/2132571)


STEP1-1

var win1 = Titanium.UI.createWindow({backgroundColor:'#black'});var totalScore = 0;var scoreLabel = Titanium.UI.createLabel({ top : 10, left : 10, height : 20, width : 'auto', color : 'white', text : 'Score: ' + totalScore});


STEP1-2

var quicktigame2d = require('com.googlecode.quicktigame2d');var game = quicktigame2d.createGameView();var scene = quicktigame2d.createScene();game.screen = {width:320, height:480};game.fps = 30;game.color(0, 0, 0);game.pushScene(scene);


STEP1-3

var tank = quicktigame2d.createSprite({ image:'images/tank.png'});tank.x = (game.screen.width/2) - (tank.width/2);tank.y = game.screen.height - tank.height;var back = quicktigame2d.createSprite({ image:'images/back.png'});back.x = (game.screen.width/2) - (back.width/2);back.y = 480 - back.height;scene.add(back);scene.add(tank);


It’s not easy to arrange tankx postion

game.screen.width/2

tank.width/2

Incorrect Correct

(game.screen.width/2) -

(tank.width/2)


game.screen.height

Incorrect Correct

It’s not easy to arrange tanky postion

game.screen.height -

tank.height


STEP1-4

game.addEventListener('onload', function(e) { game.start();});win1.add(game);win1.add(scoreLabel);win1.open();


STEP2-1// 中略scene.add(tank);var aliens = [];var aliensSpeed = [];var bullets = [];var bulletsSpeed = [];game.addEventListener('onload', function(e) { initAliens(); initBullet(); game.start();});// 中略win1.open();function initBulletsPostion(){ return tank.x + (tank.width/2) -(bullets[0].width/2);}


STEP2-2

function initAliens(){ for (var i = 0; i < 5; i++) { aliens[i]= quicktigame2d.createSprite({ image:'images/alien1.png' }); aliensSpeed[i] = 5; aliens[i].x = Math.random() * game.screen.width; aliens[i].y = -100; scene.add(aliens[i]); }}


Enemies positionleft&top:originX=0Y=0

In this case(y=100), enemies are arranged around here


STEP2-3

function initBullet(){ for(var j=0;j< 10;j++){ bullets[j]= quicktigame2d.createSprite({ image:'images/bullet.png' }); bullets[j].x = initBulletsPostion(); bullets[j].y = tank.y - (bullets[j].height); bulletsSpeed[j] = 10; scene.add(bullets[j]); }}


STEP3-1

// 中略game.addEventListner(‘onload’・・);game.addEventListener('enterframe', function(e) { bulletCollidesWithAliens(); updateAliensPosition(); updateBulletPosition();});game.addEventListener('touchmove',function(e){ tank.x = e.x;});initBulletPosition(){....}


enterframeEvent?“enterframe event is fired on every time the view starts to draw the frame.”

0

1sec

2sec

Y:-100

Y:-90

Y:-80

Y:-100

Y:-50

Y:0

Y:-100

Y:0

Y:100

Speed=10

3sec Y:-70 Y:50 Y:200

ExampleSpeed=50 Speed=100


As a result

Speed=10 Speed=50 Speed=100


STEP3-2

function updateAliensPosition(){ for (var i = 0; i <5; i++) { aliens[i].y += aliensSpeed[i] * Math.random(); if(aliens[i].y > 480){ aliens[i].y = -100; } }}function updateBulletPosition(){ for (var i = 0; i < 10; i++) { bullets[i].y -= bulletsSpeed[i]; if(bullets[i].y < 0 || bullets[i].y > 480){ bullets[i].x = initBulletsPostion(); bullets[i].y = tank.y - (bullets[i].height); } }}


STEP3-3// Check if enemies and bullets intersectfunction bulletCollidesWithAliens(){ for (var i = 0; i < 10; i++) { for(var j=0;j<5;j++){ var flg = bullets[i].collidesWith(aliens[j]); if(flg){ totalScore +=100; scoreLabel.text = ('Score:' + totalScore); aliens[j].y = -100;

// reset bullet poition on gun of tank bullets[i].x = initBulletsPostion(); bullets[i].y = tank.y - (bullets[i].height); } } }}


var gameLevel ={ easy:{ MAXALIENS :5, MAXBULLETS :15, ALIENSSPEED:10, BULLETSSPEED:15 }, hard:{ MAXALIENS :10, MAXBULLETS :10, ALIENSSPEED:15, BULLETSSPEED:10 }};var selectedLevel = 'easy';function initAliens(){ var counter = gameLevel[selectedLevel].MAXALIENS; for (var i = 0; i < counter; i++) {

おまけ：ゲーム難易度設定

• 難易度について

• 弾道の数、速度や敵の数、移動スピードといったパラメータを変更で実現可能

• マジックナンバー防止

• それぞれのスプライトに直接値を設定してしまうと理解できなくなる可能性大

• こんな感じにしておくと良いかも→


Entertainment & Humor

2012 03-24-titanium plusquicktigame2d