Here’s a class for fading music in Cocos2dx 2.x using the SimpleAudioEngine. Seems like this should be a basic function of the SimpleAudioEngine itself, but this is pretty easy to use, just run it on any CCNode like any other action:

runAction(MusicFade::create(1.0f, 0.0f, true));

Copy and paste from below, or here’s a zip with the files.

#include "MusicFade.h"
#include "SimpleAudioEngine.h"

using namespace cocos2d;
using namespace CocosDenshion;

MusicFade::MusicFade()
{
    m_initialVal = 0;
    m_targetVal = 0;
}

MusicFade* MusicFade::create(float duration, float volume, bool pauseOnComplete)
{
    MusicFade *pAction = new MusicFade();
    pAction->initWithDuration(duration, volume, pauseOnComplete);
    pAction->autorelease();

    return pAction;
}

bool MusicFade::initWithDuration(float duration, float volume, bool pauseOnComplete)
{
    if (CCActionInterval::initWithDuration(duration))
    {
        m_targetVal = volume;
        m_bPauseOnComplete = pauseOnComplete;
        return true;
    }

    return false;
}

void MusicFade::update(float time)
{
    float vol = m_initialVal + time*(m_targetVal - m_initialVal);
    SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(vol);

}

void MusicFade::startWithTarget(CCNode *pTarget)
{
    CCActionInterval::startWithTarget( pTarget );
    m_initialVal = SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume();
}

void MusicFade::stop(void)
{
    if(m_bPauseOnComplete) SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();
    CCActionInterval::stop();
}

#ifndef __MusicFade__
#define __MusicFade__

#include "cocos2d.h"

class MusicFade : public cocos2d::CCActionInterval
{
public:
    MusicFade();

    static MusicFade* create(float d, float volume, bool pauseOnComplete = false );
    bool initWithDuration(float d, float volume, bool pauseOnComplete );

    virtual void startWithTarget(cocos2d::CCNode *pTarget);
    virtual void update(float time);
    virtual void stop(void);

protected:
    float m_targetVal;
    float m_initialVal;
    bool m_bPauseOnComplete;
};

#endif /* defined(__MusicFade__) */

Glyf Design has changed it’s name to Fuguelike.

Why? Glyf Design was created back in 2006. The ‘design’ label is no longer accurate. And ‘glyf’ seems to be confusing for many people to read.

Fuguelike is an unusual word, and it has a double connotation: First it is the name for the baroque form of music that has a formal structure and a mathematical beauty. There is also the fugue state – a memoryless dreamlike trance. The aim is to produce both through digital experiences.

This blog’s new domain will be http://fuguelike.com, although it will be duplicated here for a while longer as well.