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

头文件

T19Draw.h

#ifndef __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

T19Draw.cpp

#include "T19Draw.h"

#include "AppMacros.h"

CCScene *T19Draw::scene()

{

scene = CCScene::create();

T19Draw * layer = create();

scene->addChild(layer);

return scene;

}

bool init()

{

TBack::init();

return true;

}

voID draw()

{

//设置点的尺寸大小

ccPointSize(10);

//设置颜色

ccDrawcolor4B(255,0);

//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(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);

gllinewidth(5);

ccDrawline(

//画一个矩形,由对角线的两个点最终生成两个矩形

ccDrawRect(ccp(400,300));

CCPoint poly[] = { ccp(150,150),138); Font-family:新宋体; Font-size:9.5pt">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);

}

运行结果：

@H_301_880@

#include "SimpleAudioEngine.h"

using namespace CocosDenshion;

平台

支持的常见文件格式

备注

AndroID

mp3,mID,oggg,wav

可以播放androID,media,MediaPlayer所支持的所有格式

ios

acc,caf,mp3,0); padding:0cm 5.4pt; wIDth:223.65pt; background-color:transparent">

可以播放AVAudioPlayer所支持的所有格式

windows

mID,0); padding:0cm 5.4pt; wIDth:223.65pt; background-color:transparent">

无

平台

支持的常见文件格式

AndroID

aggg,0); padding:0cm 5.4pt; wIDth:223.65pt; background-color:transparent">

对wav的支持不完美

Ios

caf,m4a

可以播放Cocos2d-iphone,CocosDesion所支持的所有格式

windows

无

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

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

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

bool T19Music::cctouchBegan(CCtouch *ptouch,CCEvent *pEvent) {

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;

}

//设置音量大小

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

//获得音量的大小

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

voID AppDelegate::applicationDIDEnterBackground() {

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();

}

T20Music.h

#ifndef __T20Music_H__

#define __T20Music_H__

#include "TBack.h"

USING_NS_CC;

class T20Music :public T20Music);

bool init();

virtual bool cctouchBegan(CCtouch *ptouch,CCEvent *pEvent);

};

#endif

T20Music.cpp

#include "T20Music.h"

#include "AppMacros.h"

#include "SimpleAudioEngine.h"

using namespace CocosDenshion;

T20Music::CCScene *T20Music * layer = init();

//预加载音乐

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

preloadEffect("audio/onclick.wav");

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 CCEvent *pEvent)

{

static bool flag = true;

playEffect("audio/onclick.wav");

if (flag)

{

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

//暂停播放音乐

pauseBackgroundMusic();

}

else

{

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

//重新恢复播放音乐

resumeBackgroundMusic();

}

flag = !flag;

//控制音量

setBackgroundMusicVolume(0.1f);

stopAllEffects();

unloadEffect("audio/start.wav");

return false;

}

运行效果是：当进入这个scene之后就会听见音乐，当鼠标点击的时候声音停止了。