Cocos2d-x FlappyBird

 HelloWorldScene.cpp

  1 #include "HelloWorldScene.h"

  2 

  3 USING_NS_CC;

  4 

  5 CCScene* HelloWorld::scene()

  6 {

  7     // 'scene' is an autorelease object

  8     CCScene *scene = CCScene::create();

  9 

 10     // 'layer' is an autorelease object

 11     HelloWorld *layer = HelloWorld::create();

 12 

 13     //添加一个背景颜色图层

 14     CCSize s = CCDirector::sharedDirector()->getWinSize();

 15 

 16     CCLayer *colorlayer = CCLayerColor::create(ccc4(0x00, 0xff, 0xff, 0xff), s.width, s.height);

 17 

 18     colorlayer->ignoreAnchorPointForPosition(false);

 19 

 20     colorlayer->setPosition(s.width / 2, s.height / 2);

 21 

 22     scene->addChild(colorlayer, 1, colorlayer->getTag());

 23     

 24     // add layer as a child to scene

 25     //将主图层添加都背景图层中

 26     colorlayer->addChild(layer);

 27 

 28     // return the scene

 29     return scene;

 30 }

 31 

 32 // on "init" you need to initialize your instance

 33 bool HelloWorld::init()

 34 {

 35     //////////////////////////////

 36     // 1. super init first

 37     if ( !CCLayer::init() )

 38     {

 39         return false;

 40     }

 41 

 42     //取得屏幕的大小

 43     screenSize = CCDirector::sharedDirector()->getVisibleSize();

 44 

 45     //初始化世界

 46     initWorld();

 47 

 48     //添加小鸟、障碍物容器及地面

 49     addBird();

 50     addBarContainer();

 51     addGround();

 52 

 53     //每隔一秒添加一组障碍物

 54     scheduleUpdate();

 55     schedule(schedule_selector(HelloWorld::addBar), 1.0f);

 56 

 57     //设置允许触摸

 58     setTouchEnabled(true);

 59 

 60     return true;

 61 }

 62 

 63 void HelloWorld::initWorld()

 64 {

 65     //重力加速度：纵向9.8，横向 0

 66     world = new b2World(b2Vec2(0, -9.8f));

 67     //添加监视

 68     world->SetContactListener(this);

 69 }

 70 

 71 void HelloWorld::startGame(float dt){

 72     scheduleUpdate();

 73     schedule(schedule_selector(HelloWorld::addBar), 1);

 74 }

 75 

 76 void HelloWorld::stopGame(){

 77     unscheduleUpdate();

 78     unschedule(schedule_selector(HelloWorld::addBar));

 79 }

 80 

 81 

 82 void HelloWorld::addBird()

 83 {

 84     bird = B2Sprite::create("bird.png");

 85     CCSize size = bird->getContentSize();

 86 

 87     //添加小鸟

 88     b2BodyDef bodyDef;

 89     bodyDef.type = b2_dynamicBody;

 90     bodyDef.position = b2Vec2(screenSize.width/2/RATIO, screenSize.height/2/RATIO);

 91     b2Body * birdBody = world->CreateBody(&bodyDef);

 92 

 93     //设置边界

 94     b2PolygonShape birdShape;

 95     birdShape.SetAsBox(size.width/2/RATIO, size.height/2/RATIO);

 96 

 97     //碰撞

 98     b2FixtureDef birdFixtureDef;

 99     birdFixtureDef.shape= &birdShape;

100     birdBody->CreateFixture(&birdFixtureDef);

101 

102     bird->setPTMRatio(RATIO);

103     bird->setB2Body(birdBody);

104     addChild(bird);

105 }

106 

107 void HelloWorld::addBar(float dt)

108 {

109     float offset = -rand()%5;

110 

111     //downbar

112     B2Sprite *downBar = B2Sprite::create("down_bar.png");

113     CCSize downBarSize = downBar->getContentSize();

114 

115     b2BodyDef downBarBodyDef;

116     downBarBodyDef.type = b2_kinematicBody;

117     downBarBodyDef.position = b2Vec2(screenSize.width/RATIO + 2, downBarSize.height/RATIO/2 + offset);

118     downBarBodyDef.linearVelocity = b2Vec2(-5.0f, 0);

119 

120     b2PolygonShape downBarShape;

121     downBarShape.SetAsBox(downBarSize.width/RATIO/2, downBarSize.height/RATIO/2);

122 

123     b2FixtureDef downBarFixtureDef;

124     downBarFixtureDef.shape = &downBarShape;

125 

126     b2Body *downBarBody = world->CreateBody(&downBarBodyDef);

127     downBarBody->CreateFixture(&downBarFixtureDef);

128 

129     downBar->setB2Body(downBarBody);

130     downBar->setPTMRatio(RATIO);

131 

132     //upbar

133     B2Sprite *upBar = B2Sprite::create("up_bar.png");

134     CCSize upBarSize = upBar->getContentSize();

135 

136     b2BodyDef upBarBodyDef;

137     upBarBodyDef.type = b2_kinematicBody;

138     upBarBodyDef.position = b2Vec2(screenSize.width/RATIO + 2, upBarSize.height/RATIO/2 + offset + downBarSize.height/RATIO + 2.5f);

139     upBarBodyDef.linearVelocity = b2Vec2(-5, 0);

140 

141     b2PolygonShape upBarShape;

142     upBarShape.SetAsBox(upBarSize.width/RATIO/2, upBarSize.height/RATIO/2);

143 

144     b2FixtureDef upBarFixtureDef;

145     upBarFixtureDef.shape = &upBarShape;

146 

147     b2Body *upBarBody = world->CreateBody(&upBarBodyDef);

148     upBarBody->CreateFixture(&upBarFixtureDef);

149 

150     upBar->setB2Body(upBarBody);

151     upBar->setPTMRatio(RATIO);

152 

153     barContainer->addChild(upBar);

154     barContainer->addChild(downBar);

155 }

156 

157 void HelloWorld::addBarContainer()

158 {

159     //将所有的障碍物包裹在一个容器中

160     barContainer = CCSprite::create();

161     addChild(barContainer);

162 }

163 

164 void HelloWorld::addGround()

165 {

166     B2Sprite *ground = B2Sprite::create("ground.png");

167     CCSize size = ground->getContentSize();

168 

169     b2BodyDef bDef;

170     bDef.type = b2_staticBody;

171     bDef.position = b2Vec2(size.width/2/RATIO, size.height/2/RATIO);

172     b2Body *groundBody = world->CreateBody(&bDef);

173 

174     b2PolygonShape groundShape;

175     groundShape.SetAsBox(size.width/2/RATIO, size.height/2/RATIO);

176 

177     b2FixtureDef groundFixtureDef;

178     groundFixtureDef.shape = &groundShape;

179     groundBody->CreateFixture(&groundFixtureDef);

180 

181     ground->setPTMRatio(RATIO);

182     ground->setB2Body(groundBody);

183     addChild(ground);

184 }

185 

186 void HelloWorld::update(float dt)

187 {

188     world->Step(dt, 8, 3);

189 

190     CCSprite *sprite;

191 

192     //取得世界中的所有的body

193     b2Body *node = world->GetBodyList();

194 

195     //遍历世界中的body

196     while(node)

197     {

198         b2Body *body = node;

199         node = node->GetNext();

200         sprite = (CCSprite*)body->GetUserData();

201 

202         //超出屏幕左边界，销毁

203         if (body->GetPosition().x < -1)

204         {

205             if (sprite != NULL)

206             {

207                 //在屏幕上清除

208                 sprite->removeFromParent();

209             }

210             //在内存中销毁

211             world->DestroyBody(body);

212         }

213     }

214 }

215 

216 void HelloWorld::BeginContact(b2Contact *contact){

217     //碰撞检测，有一个为鸟游戏就结束

218     if (contact->GetFixtureA()->GetBody()->GetUserData()==bird || contact->GetFixtureB()->GetBody()->GetUserData()==bird)

219     {

220         //游戏结束，弹出dialog

221         stopGame();

222         CCMessageBox("Game Over", "Alert");

223     }

224 }

225 

226 void HelloWorld::ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent)

227 {

228     //触碰屏幕时，小鸟向上运动，重力加速度：纵向 5，横向 0

229     bird->getB2Body()->SetLinearVelocity(b2Vec2(0, 5.0f));

230 }

231 

232 

233 void HelloWorld::menuCloseCallback(CCObject* pSender)

234 {

235 #if (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT) || (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)

236     CCMessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");

237 #else

238     CCDirector::sharedDirector()->end();

239 #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)

240     exit(0);

241 #endif

242 #endif

243 }

HelloWorldScene.h

 1 #ifndef __HELLOWORLD_SCENE_H__

 2 #define __HELLOWORLD_SCENE_H__

 3 

 4 #include "cocos2d.h"

 5 #include "Box2D\Box2D.h"

 6 #include "B2Sprite.h"

 7 

 8 #define RATIO 72.0f

 9 

10 class HelloWorld : public cocos2d::CCLayer,public b2ContactListener

11 {

12 public:

13     // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone

14     virtual bool init();  

15 

16     // there's no 'id' in cpp, so we recommend returning the class instance pointer

17     static cocos2d::CCScene* scene();

18     

19     // a selector callback

20     void menuCloseCallback(CCObject* pSender);

21     

22     // implement the "static node()" method manually

23     CREATE_FUNC(HelloWorld);

24 

25     virtual void ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent);

26     virtual void BeginContact(b2Contact* contact);

27 

28     virtual void update(float dt);

29 

30     b2World *world;

31     B2Sprite *bird;

32 

33     CCSize screenSize;

34 

35     CCSprite *barContainer;

36 

37 private:

38     void addBird();

39     void addGround();

40     void initWorld();

41     void addBar(float dt);

42     void addBarContainer();

43     void startGame(float dt);

44     void stopGame();

45 };

46 

47 #endif // __HELLOWORLD_SCENE_H__