Cocos2dx游戏开发笔记21：动手学习《Flappy Bird》（待续）

Cocos2dx游戏开发笔记21：动手学习《Flappy Bird》（待续）

2014-02-11      我来说两句    来源：苦  

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懒骨头（http://blog.csdn.net/iamlazybone QQ：124774397 ）

《Flappy Bird》

关于这个游戏骨头不多说了<喎�"http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+1rG907+qyrzRp8+wsMmjqMm91a+yu7rDzP2jqTwvcD4KPHA+1f26w8ewts7Ksbzkv7TBy7y4uPZERU1PxMPV4rj2087Pt8G3wbfK1jwvcD4KPHA+v6q446OhPC9wPgo8cD48YnI+CjwvcD4KPHA+sai7t76zo7o8L3A+CjxwPnZzMjAxMyYjNDM7Y29jb3MyZHgzLjBiZXRhMjxicj4KPC9wPgo8cD7K18/Iz8LU2GFwa6Os1dK1vdfK1LTOxLz+o6yyw7z0vLi49s28xqyjujwvcD4KPHA+PGltZyBzcmM9"http://www.2cto.com/uploadfile/Collfiles/20140211/2014021108530418.jpg" alt="\">

用脚本新建一个空的Cocos2dx项目

新建一个Scene类

#include "cocos2d.h"
#include "Obstacle.h"

class FlyBirdGame : public cocos2d::Layer
{
public :
    static cocos2d::Scene* createScene();
    virtual bool init();
    CREATE_FUNC(FlyBirdGame);
    void initUI();
    void gameStart(Object* pSender);
    void update( float time);
    Obstacle* obstacle;
};

#include "cocos2d.h"
#include "FlyBirdGame.h"
#include "resource.h" ;

USING_NS_CC;

Scene* FlyBirdGame::createScene()
{
    auto scene = Scene::create();
    auto layer = FlyBirdGame::create();
    scene->addChild(layer);
    return scene;
}

bool FlyBirdGame::init()
{
    if (!Layer::init())
    {
        return false ;
    }
    initUI();
    return true ;
}

initUI里是一些UI初始化方法：

    // win size
auto winSize = Director::getInstance()->getVisibleSize();

// game bg
auto bg = Sprite::create(bird_bg);
bg->setPosition(winSize.width / 2 , winSize.height / 2 );
bg->setScale(winSize.width / bg->getContentSize().width, winSize.height / bg->getContentSize().height);
this ->addChild(bg);

// start btn
auto startBtn = MenuItemImage::create(bird_start_btn, bird_start_btn_pressed, CC_CALLBACK_1(FlyBirdGame::gameStart, this ));
auto menu = Menu::create(startBtn, NULL);
menu->setTag( 100 );
this ->addChild(menu);

// hero
auto hero = Sprite::create(bird_hero);
hero->setPosition(winSize.width / 5 , winSize.height* 0.8 );
hero->setVisible( false );
hero->setTag( 200 );
this ->addChild(hero);

开始游戏按钮绑定的gameStart方法：

void FlyBirdGame::gameStart(Object* pSender)
{
    auto btn = this ->getChildByTag( 100 );
    btn->setVisible( false );
    auto hero = this ->getChildByTag( 200 );
    Size win = Director::getInstance()->getWinSize();
    obstacle->gameStart = true ;
}

隐藏开始按钮，显示小鸟，水管开始移动

还有更新方法：

scheduleUpdate();
void FlyBirdGame::update( float time)
{
    obstacle->update();
}

=======================================

水管类：Obstacle.cpp

update方法里判断游戏是游戏是否开始

void Obstacle::update()
{
    if (gameStart == false )
        return ;
    addCount++;
    if (addCount == 60 )
    {
        addOne( 0 );
        addCount = 0 ;
    }
    for ( int i = obstacleList->count() - 1 ; i >= 0 ; i--)
    {
        auto s = (Sprite*)obstacleList->getObjectAtIndex(i);
        s->setPositionX(s->getPositionX() - 3 );
        if (s->getPositionX() < -s->getContentSize().width / 2 )
        {
            obstacleList->removeObjectAtIndex(i);
            this ->removeChild(s);
        }
    }
}

水管类的更新方法里，每60帧（1秒）添加一对水管

并且遍历水管列表

出边界的化销毁

接下来是addOne方法：添加水管方法：

void Obstacle::addOne( int offsetX)
{
    Size size = Director::getInstance()->getWinSize();
    auto sprite = Sprite::create(bird_obstacle_up);
    Size spriteSize = sprite->getContentSize();
    obstacleList->addObject(sprite);
    this ->addChild(sprite);
    auto sprite2 = Sprite::create(bird_obstacle_down);
    Size spriteSize2 = sprite->getContentSize();
    obstacleList->addObject(sprite2);
    this ->addChild(sprite2);
    // set positon
    int maxUpY = size.height + spriteSize.height / 4 ;
    int minUpY = size.height - spriteSize.height / 4 ;
    int y1 = CCRANDOM_0_1()*(maxUpY - minUpY) + minUpY;
    int maxDownY = spriteSize.height / 4 ;
    int minDownY = -spriteSize.height / 4 ;
    int y2 = CCRANDOM_0_1()*(maxDownY - minDownY) + minDownY;
    if (y1 - y2 - spriteSize.height < 160 )
    {
        y2 = y1 - spriteSize.height - 160 ;
    }
    sprite->setPosition(ccp(size.width + spriteSize.width / 2 + offsetX, y1));
    sprite2->setPosition(ccp(size.width + spriteSize2.width / 2 + offsetX, y2));
}

这段代码比较凌乱，就是找到水管上下位置的范围

然后随机一下，并且保证上下连个水管有个最小的距离

效果如下：

=============================

此时的游戏还没触摸和碰撞逻辑

马上添加：（刚才抽空玩了把魔方：五阶的我只能搞定一个面，虽然有官方规律但是那样好像比的是记忆力）

听说cocos2dx3.0的事件监听方式改变了

先在FlyBirdGame.h里声明俩方法：

void onTouchesEnded( const vector<touch*>& touches, Event* event);
void onTouchesBegan( const vector<touch*>& touches, Event* event);</touch*></touch*>

在cpp文件的初始化里绑定事件：

// touch
auto dispatcher = Director::getInstance()->getEventDispatcher();
auto listener = EventListenerTouchAllAtOnce::create();
listener->onTouchesEnded = CC_CALLBACK_2(FlyBirdGame::onTouchesEnded, this );
listener->onTouchesBegan = CC_CALLBACK_2(FlyBirdGame::onTouchesBegan, this );
dispatcher->addEventListenerWithSceneGraphPriority(listener, this );

在两个事件方法里改变标记位，在小鸟的update方法里根据这个标记位来改变高度

（哲哲喊我休息了，先到这吧，待续。。。）