1.編寫T32.h

#ifndef __T32_H__

#define __T32_H__

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#include "cocos2d.h"

USING_NS_CC;

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#define winSize Director::getInstance()->getWinSize()

#define CCLog cocos2d::log

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#endif

2.編寫TBack.h

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#ifndef __TBack_H__

#define __TBack_H__

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#include "T32.h"

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class TBack : public Layer

{

public:

??? CREATE_FUNC(TBack);

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??? bool init();

};

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#endif

3編寫TBack.cpp

#include "TBack.h"

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bool TBack::init()

{

??? Layer::init();

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??? setLocalZOrder(100);

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??? Menu* menu = Menu::create();

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??? MenuItemImage* item = MenuItemImage::create("CloseNormal.png", "CloseSelected.png",

??????? [](Ref*){

??????? Director::getInstance()->popScene();

??? });

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??? menu->addChild(item);

??? item->setPosition(winSize.width / 2 - item->getBoundingBox().size.width / 2,

??????? item->getBoundingBox().size.height / 2 - winSize.height / 2);

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??? addChild(menu);

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??? return true;

}

4.編寫T06Box2D.h

#ifndef __T06Box2D_H__

#define __T06Box2D_H__

#include "T32.h"

#include "Box2D/Box2D.h"

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class T06Box2D : public Layer

{

public:

??? CREATE_FUNC(T06Box2D);

??? bool init();

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??? b2World* _world;

??? b2Body* _bat;

??? void update(float);

};

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#endif

5編寫：T06Box2D.cpp

#include "T06Box2D.h"

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#define PTM_RATIO 32.0f

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bool T06Box2D::init()

{

??? Layer::init();

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??? //創(chuàng)建世界,后面的-9.8表示向下的重力加速度為9.8

??? //b2Vec2 gravity(0,-9.8f);

??? //這個表示沒有重力加速度

??? b2Vec2 gravity(0,0.0f);

??? _world = new b2World(gravity);

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??? {

??????? b2BodyDef def;

??????? //這里是一個動態(tài)的body，默認是靜態(tài)的body

??????? def.type = b2_dynamicBody;

??????? //設(shè)置位置，要轉(zhuǎn)換成重力場中的位置要除以PTM_RATIO

??????? def.position.Set(winSize.width / 2 / PTM_RATIO, winSize.height / 2 / PTM_RATIO);

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??????? b2Body* body = _world->CreateBody(&def);

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??????? //讓body受力

??????? body->SetLinearVelocity(b2Vec2(10,20));

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??????? //顯示body的精靈

??????? Sprite* sprite = Sprite::create("CloseNormal.png");

??????? addChild(sprite);

??????? sprite->setPosition(body->GetPosition().x*PTM_RATIO, body->GetPosition().y*PTM_RATIO);

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??????? //設(shè)置body的形狀，讓它和sprite相一致,是圓形的

??????? b2CircleShape shape;

??????? //設(shè)置半徑

??????? shape.m_radius = sprite->getContentSize().width / 2 / PTM_RATIO;

??????? //后面的一個參數(shù)表示的是密度系數(shù)

??????? b2Fixture* fixture = body->CreateFixture(&shape, 1.0f);

??????? //設(shè)置摩擦系統(tǒng)

??????? fixture->SetFriction(0.0f);

??????? //彈性系數(shù)

??????? fixture->SetRestitution(1.0f);

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??????? //關(guān)聯(lián)body和精靈

??????? body->SetUserData(sprite);

??? }

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??? //加個地板

??? {

??????? b2BodyDef def;

??????? // def.position.Set(0, 0);

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??????? b2Body* body = _world->CreateBody(&def);

??????? //設(shè)置邊界類型的形狀

??????? b2EdgeShape shape;

??????? //設(shè)置地板的開始點和結(jié)束點

??????? shape.Set(b2Vec2(0, 0), b2Vec2(winSize.width / PTM_RATIO, 0));

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??????? b2Fixture* fixture = body->CreateFixture(&shape, 1.0f);

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??????? //設(shè)置摩擦系數(shù)

??????? fixture->SetFriction(0.0f);

??????? //設(shè)置彈性系數(shù)

??????? fixture->SetRestitution(1.0f);

??? }

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??? //加個天花板

??? {

??????? b2BodyDef def;

??????? def.position.Set(0, winSize.height / PTM_RATIO);

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??????? b2Body* body = _world->CreateBody(&def);

??????? b2EdgeShape shape;

??????? shape.Set(b2Vec2(0, 0), b2Vec2(winSize.width / PTM_RATIO, 0));

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??????? b2Fixture* fixture = body->CreateFixture(&shape, 1.0f);

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??????? //摩擦系統(tǒng)

??????? fixture->SetFriction(0.0f);

??????? //彈性系數(shù)

??????? fixture->SetRestitution(1.0f);

??? }

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??? //左擋板

??? {

??????? b2BodyDef def;

??????? //def.position.Set(0, winSize.height / PTM_RATIO);

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??????? b2Body* body = _world->CreateBody(&def);

??????? b2EdgeShape shape;

??????? shape.Set(b2Vec2(0, 0), b2Vec2(0, winSize.height / PTM_RATIO));

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??????? b2Fixture* fixture = body->CreateFixture(&shape, 1.0f);

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??????? fixture->SetFriction(0.0f); //摩擦系統(tǒng)

??????? fixture->SetRestitution(1.0f); //彈性系數(shù)

??? }

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??? //右擋板

??? {

??????? b2BodyDef def;

??????? def.position.Set(winSize.width / PTM_RATIO, 0);

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??????? b2Body* body = _world->CreateBody(&def);

??????? b2EdgeShape shape;

??????? shape.Set(b2Vec2(0, 0), b2Vec2(0, winSize.height / PTM_RATIO));

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??????? b2Fixture* fixture = body->CreateFixture(&shape, 1.0f);

??????? //摩擦系數(shù)

??????? fixture->SetFriction(0.0f);

??????? //彈性系數(shù)

??????? fixture->SetRestitution(1.0f);

??? }

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??? //球拍

??? {

??????? b2BodyDef def;

??????? def.position.Set(winSize.width / 2 / PTM_RATIO, winSize.height / 4 / PTM_RATIO);

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??????? b2Body* body = _world->CreateBody(&def);

??????? _bat = body;

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??????? Sprite* sprite = Sprite::create("bat.png");

??????? body->SetUserData(sprite);

??????? addChild(sprite);

??????? sprite->setPosition(body->GetPosition().x*PTM_RATIO, body->GetPosition().y*PTM_RATIO);

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??????? Size batSize = Size(100,30);

??????? Size content = sprite->getContentSize();

??????? sprite->setScale(batSize.width / content.width, batSize.height / content.height);

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??????? b2PolygonShape shape;

??????? shape.SetAsBox(batSize.width / 2 / PTM_RATIO, batSize.height / 2 / PTM_RATIO);

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??????? b2Fixture* fixture = body->CreateFixture(&shape, 1.0f);

??????? //摩擦系統(tǒng)

??????? fixture->SetFriction(0.0f);

??????? //彈性系統(tǒng)

??????? fixture->SetRestitution(1.0f);

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??????? //touch

??????? EventListenerTouchOneByOne* ev = EventListenerTouchOneByOne::create();

??????? ev->onTouchBegan = [](Touch*, Event*){return true; };

??????? ev->onTouchMoved = [&](Touch* touch, Event*){

??????????? float dx = touch->getDelta().x / PTM_RATIO;

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??????????? b2Vec2 pos = _bat->GetPosition();

??????????? pos.x += dx;

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??????????? //下面的函數(shù)等價于setPosition()

??????????? _bat->SetTransform(pos, 0);

??????? };

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??????? _eventDispatcher->addEventListenerWithSceneGraphPriority(ev, this);

??? }

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??? scheduleUpdate();

??? return true;

}

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void T06Box2D::update(float dt)

{

????? //時間在流逝

??? _world->Step(dt, 8, 1);

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??? //遍歷這個世界的body

??? b2Body* body = _world->GetBodyList();

??? while (body)

??? {

??? ??? //設(shè)置body相關(guān)的精靈的位置

??????? Sprite* sprite = (Sprite*)body->GetUserData();

??????? if (sprite)

??????? {

??????????? sprite->setPosition(body->GetPosition().x*PTM_RATIO, body->GetPosition().y*PTM_RATIO);

??????????? sprite->setRotation(body->GetAngle()*180.0 / M_PI);

??????? }

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??????? body = body->GetNext();

??? }

}

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6.編寫TMenu.h

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#ifndef __TMenu_H__

#define __TMenu_H__

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#include "T32.h"

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class TMenu : public Layer

{

public:

??? CREATE_FUNC(TMenu);

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??? bool init();

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??? bool TouchBegan(Touch*, Event*);

};

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#endif

7. 編寫：TMenu.cpp

#include "TMenu.h"

#include "TBack.h"

#include "T01CPP11.h"

#include "T02Vector.h"

#include "T03Map.h"

#include "T04Label.h"

#include "T06Box2D.h"

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static const char* title[] = {

??? "T01CPP11",

??? "T02Vector",

??? "T03Map",

??? "T04Label",

??? "T06Box2D"

};

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bool TMenu::init()

{

??? Layer::init();

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??? Menu* menu = Menu::create();

??? addChild(menu);

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??? for (int i = 0; i < sizeof(title) / sizeof(*title); ++i)

??? {

??????? MenuItemFont* item = MenuItemFont::create(title[i], [](Ref* sender){

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??????????? MenuItem* item = (MenuItem*)sender;

??????????? int i = item->getTag()-1000;

??????????? Layer* l = NULL;

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??????????? if (title[i] == "T01CPP11")? l = T01CPP11::create();

??????????? if (title[i] == "T02Vector") l = T02Vector::create();

??????????? if (title[i] == "T03Map") l = T03Map::create();

??????????? if (title[i] == "T04Label") l = T04Label::create();

??????????? if (title[i] == "T06Box2D") l = T06Box2D::create();

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??????????? if (l)

??????????? {

??????????????? TBack* b = TBack::create();

??????????????? Scene* s = Scene::create();

??????????????? s->addChild(b);

??????????????? s->addChild(l);

??????????????? Director::getInstance()->pushScene(s);

??????????? }

??????? });

??????? menu->addChild(item);

??????? item->setTag(1000 + i);

??? }

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??? menu->alignItemsVertically();

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??? // 觸摸

??? auto ev = EventListenerTouchOneByOne::create();

#if 0

??? ev->onTouchBegan = [](Touch*, Event*){

??????? return true;

??? };

#endif

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??? //ev->onTouchBegan = std::bind(&TMenu::TouchBegan, this, std::placeholders::_1, std::placeholders::_2);

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??? ev->onTouchBegan = CC_CALLBACK_2(TMenu::TouchBegan, this);

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??? ev->onTouchMoved = [&](Touch* touch, Event*){

??????? setPositionY(getPositionY() + touch->getDelta().y);

??? };

??? _eventDispatcher->addEventListenerWithSceneGraphPriority(ev, this);

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??? return true;

}

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bool TMenu::TouchBegan(/*TMEnu* this, */Touch*, Event*)

{

??? return true;

}

8.編寫AppDelegate.cpp

#include "AppDelegate.h"

#include "TMenu.h"

#include "TBack.h"

USING_NS_CC;

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AppDelegate::AppDelegate() {

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}

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AppDelegate::~AppDelegate()

{

}

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bool AppDelegate::applicationDidFinishLaunching() {

??? // initialize director

??? auto director = Director::getInstance();

??? auto glview = director->getOpenGLView();

??? if(!glview) {

??????? glview = GLView::create("My Game");

??????? glview->setFrameSize(480, 320);

??????? director->setOpenGLView(glview);

??? }

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??? glview->setDesignResolutionSize(480, 320, ResolutionPolicy::EXACT_FIT);

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??? // turn on display FPS

??? director->setDisplayStats(true);

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

??? director->setAnimationInterval(1.0 / 60);

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??? // create a scene. it's an autorelease object

??? auto scene = Scene::create();

??? scene->addChild(TMenu::create());

??? scene->addChild(TBack::create());

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??? // run

??? director->runWithScene(scene);

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??? return true;

}

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// 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();

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??? // if you use SimpleAudioEngine, it must be pause

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

}

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

void AppDelegate::applicationWillEnterForeground() {

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

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??? // if you use SimpleAudioEngine, it must resume here

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

}

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