接下我们来学习cocos2dx 3.2制作Flappy Bird实践建立Land陆地层。首先设置AppDelegate.cpp，修改屏幕大小，并将第一个场景设置为WelcomeScene：

#include “AppDelegate.h”

#include “WelcomeScene.h”

USING_NS_CC;

AppDelegate::AppDelegate() {

}

AppDelegate::~AppDelegate() 

{

}

bool AppDelegate::applicationDidFinishLaunching() {

// initialize director

auto director = Director::getInstance();

auto glview = director->getOpenGLView();

if(!glview) {

//修改屏幕参数

glview = GLView::createWithRect(“FlappyBird”,Rect(0,0,286,512),1.0f);

director->setOpenGLView(glview);

}

// turn on display FPS

director->setDisplayStats(true);

// set FPS. the default value is 1.0/60 if you don’t call this

director->setAnimationInterval(1.0 / 60);

//将WelcomeScene作为游戏的第一个场景

auto welcomeScene = WelcomeScene::createScene();

// run

director->runWithScene(welcomeScene);

return true;

}

// This function will be called when the app is inactive. When comes a phone call,it’s be invoked too

void AppDelegate::applicationDidEnterBackground() {

Director::getInstance()->stopAnimation();

// if you use SimpleAudioEngine, it must be pause

// SimpleAudioEngine::getInstance()->pauseBackgroundMusic();

}

// this function will be called when the app is active again

void AppDelegate::applicationWillEnterForeground() {

Director::getInstance()->startAnimation();

// if you use SimpleAudioEngine, it must resume here

// SimpleAudioEngine::getInstance()->resumeBackgroundMusic();

}

创建Land类，继承Layer:

#include “cocos2d.h”

USING_NS_CC;

class Land : public Layer 

{

public:

Land(void);

~Land(void);

virtual bool init();

CREATE_FUNC(Land);

//地面开始滚动

void landMove(float);

//地面停止滚动

void landStop();

private:

Sprite *land1;

Sprite *land2;

};#include “Land.h”

Land:and(void)

{

}

Land::~Land(void)

{

}

bool Land::init()

{

if (!Layer::init())

{

return false;

}

auto origin=Director::getInstance()->getVisibleOrigin();

auto visibleSize=Director::getInstance()->getVisibleSize();

//创建2个land，实现滚动效果

land1 = Sprite::createWithSpriteFrameName(“land.png”);

land1->setPosition(Point(origin.x+land1->getContentSize().width/2,origin.y+land1->getContentSize().height/2));

//下面这个接口是防止两个精灵叠加时出现黑边

land1->getTexture()->setAliasTexParameters();

auto land1_body = PhysicsBody::create();

auto land1_shape = PhysicsShapeBox::create(land1->getContentSize());

land1_body->addShape(land1_shape);

land1_body->setDynamic(false);//设置为静态物体

land1_body->setGravityEnable(false);//不受重力影响

land1_body->setCategoryBitmask(1);

land1_body->setCollisionBitmask(-1);

land1_body->setContactTestBitmask(-1);

land1_body->setLinearDamping(0.7f);//线性阻尼

land1->setPhysicsBody(land1_body); //绑定land1和lan1_body

addChild(land1);

land2 = Sprite::createWithSpriteFrameName(“land.png”);

land2->setPosition(Point(origin.x+land1->getPositionX()+land1->getContentSize().width-2,land1->getPositionY()));

land2->getTexture()->setAliasTexParameters();

auto land2_body = PhysicsBody::create();

auto land2_shape = PhysicsShapeBox::create(land2->getContentSize());

land2_body->addShape(land2_shape);

land2_body->setDynamic(false);

land2_body->setGravityEnable(false);

land2_body->setCategoryBitmask(1);

land2_body->setCollisionBitmask(-1);

land2_body->setContactTestBitmask(-1);

land2_body->setLinearDamping(0.7f);

land2->setPhysicsBody(land2_body);

addChild(land2);

schedule(schedule_selector(Land::landMove), 1/60);//启动计时器

return true;

}

void Land::landMove(float)

{

land1->setPositionX(land1->getPositionX()-2);

land2->setPositionX(land1->getPositionX()+land1->getContentSize().width-2);

if (land2->getPositionX()==land2->getContentSize().width/2)

{

land1->setPositionX(land2->getContentSize().width/2);

}

}

void Land::landStop()

{

unschedule(schedule_selector(Land::landMove));

}