5.cocos2dx中关于draw绘图，声音和音效，预加载，播放与停止Vs暂停和恢复，音量控制

T19Draw.h

#define
__T19Draw_H__

#include
"cocos2d.h"

#include
"TBack.h"

USING_NS_CC;

class
T19Draw:public
TBack

{

public:

static
CCScene *
scene();

CREATE_FUNC(T19Draw);

bool
init();

void
draw();

};

#endif

#include
"AppMacros.h"

CCScene *T19Draw::scene()

{

CCScene *
scene =
CCScene::create();

T19Draw *
layer =
T19Draw::create();

scene->addChild(layer);

return
scene;

}

bool
T19Draw::init()

{

TBack::init();

return
true;

}

void
T19Draw::draw()

{

//设置点的尺寸大小

ccPointSize(10);

//设置颜色

ccDrawColor4B(255,0,0,0);

//做一个点，ccp(100,100)中的值是点的坐标位置

ccDrawPoint(ccp(100,100));

//定义一个点的集合

CCPoint
p[] = {ccp(100,200),ccp(100,300),ccp(200,100)};

//开始画点，第二个参数表示点的个数

ccDrawPoints(p,
3);

//画一条线段

ccDrawColor4B(0, 255, 0, 0);

glLineWidth(5);

ccDrawLine(ccp(100,300),ccp(200,100));

//画一个矩形,由对角线的两个点最终生成两个矩形

ccDrawRect(ccp(100,100),ccp(400,300));

ccDrawColor4B(0, 0, 255, 0);

CCPoint
poly[] = {
ccp(150, 100),
ccp(200, 150),
ccp(300, 10) };

//以上面的三个点画出一个矩形，最后一个false来控制形状是否合并

//第二个参数表示的是点的个数

ccDrawPoly(poly,
3, true);

//这里表示话一个圆

ccDrawCircle(ccp(240,160),60,3.14,100,true);

}

using namespace CocosDenshion;

SimpleAudioEngine::sharedEngine()->preloadEffect(“audio/onclick.wav”);

SimpleAudioEngine::sharedEngine()->playEffect("audio/onclick.wav");

static bool flag = true;

if (flag) {

SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();

//SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();

} else {

SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();

//SimpleAudioEngine::sharedEngine()->playBackgroundMusic("audio/start.wav");

}

flag = !flag;

return true;

}

SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.1f);

//获得音量的大小

SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume();

CCDirector::sharedDirector()->stopAnimation();

// if you use SimpleAudioEngine, it must be pause

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

}

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

void AppDelegate::applicationWillEnterForeground() {

CCDirector::sharedDirector()->startAnimation();

// if you use SimpleAudioEngine, it must resume here

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

}

#define
__T20Music_H__

#include
"cocos2d.h"

#include
"TBack.h"

USING_NS_CC;

class
T20Music :public
TBack

{

public:

static
CCScene *
scene();

CREATE_FUNC(T20Music);

bool
init();

virtual
bool
ccTouchBegan(CCTouch
*pTouch,
CCEvent *pEvent);

};

#endif

#include
"AppMacros.h"

#include
"SimpleAudioEngine.h"

using
namespace
CocosDenshion;

CCScene *T20Music::scene()

{

CCScene *scene
= CCScene::create();

T20Music *
layer =
T20Music::create();

scene->addChild(layer);

return
scene;

}

bool
T20Music::init()

{

TBack::init();

//预加载音乐

SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic("audio/start.wav");

SimpleAudioEngine::sharedEngine()->preloadEffect("audio/onclick.wav");

SimpleAudioEngine::sharedEngine()->playBackgroundMusic("audio/start.wav");

//设置触摸可以行

setTouchEnabled(true);

setTouchMode(kCCTouchesOneByOne);

return
true;

}

//通过鼠标事件控制声音的显示和消失

bool
T20Music::ccTouchBegan(CCTouch
*pTouch,
CCEvent *pEvent)

{

static
bool
flag =
true;

SimpleAudioEngine::sharedEngine()->playEffect("audio/onclick.wav");

if (flag)

{

//SimpleAudioEngine::sharedEngine()->playBackgroundMusic("audio/start.wav");

//暂停播放音乐

SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();

}

else

{

//SimpleAudioEngine::sharedEngine()->stopBackgroundMusic("audio/start.wav");

//重新恢复播放音乐

SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();

}

flag = !flag;

//控制音量

SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.1f);

SimpleAudioEngine::sharedEngine()->stopAllEffects();

SimpleAudioEngine::sharedEngine()->unloadEffect("audio/start.wav");

return
false;

}