学步园

一 AnimateManager

表情管理类，保存了所有表情Animate

        typedef std::map< String, Animate* > AnimateNameRegistry;
        //All animate
        AnimateNameRegistry d_animateNameMap;
        typedef std::map< int, Animate* > AnimateIDRegistry;
        //Animate use id as index.
        AnimateIDRegistry d_animateIDMap;

 

 

二 Animate

代表一个表情，比如笑脸，包含一组笑脸的图片

        struct AnimateKey
        {
            const Image* d_image;
        };
        typedef std::vector< AnimateKey >  AnimateKeyRegistry;

 

 

其中一个比较重要的函数是

        /*!
        \brief
        Get the frame use species time and time total.
        \param time_now
        Specifies the time current.
        \param time_total
        Specifies the total time length.
        \return 
        The frame image that at the time. If the animate should stop or not start yet, return 0.
        */
        const Image* getFrame(int time_elapsed, int time_total) const;

 

 

能够根据实际便宜值，求对应的图片

另外一个函数

 

float Animate::getFrameAlpha( int time_elapsed, int time_total )
{
    if( time_total == -1 ) 
        time_total = d_totalTime;
    if( d_bModeAlpha == false )
        return 1;
    int nTime = time_elapsed;
    if( d_loopMode )
        nTime = time_elapsed % time_total;
    float alpha    = float( nTime ) / float( time_total );
    switch( d_loopType )
    {
    case 0: // 0 -- 255
        break;
    case 1: // 0 -- 255 -- 0
        {
            if( alpha < 0.5 )
                alpha *= 2;
            else
                alpha = ( 1.0f - alpha ) * 2;
        }
        break;
    case 2: // 255 -- 0
        alpha = 1 - alpha;
        break;
    }
    return alpha;
}

 

可以更新表情的alpha

三 FalagardAnimate

具体使用表情的控件，包含了Animate的指针

其中一个比较重要的函数是

    void    FalagardAnimate::updateSelf(float elapsed)
    {
        // 得到相应得播放了得时间
        if( m_pAnimate  )
        {
            if( m_bPlay )
            {
                int time_now = (int)(System::getSingleton().getCurTimeElapsed()*1000.0f);
                const Image* pFrame = m_pAnimate->getFrame( time_now - m_nAnimateStart, -1 );
                m_fAlpha = m_pAnimate->getFrameAlpha( time_now - m_nAnimateStart, -1 );
                d_normalImage.setImage( pFrame ) ;
            }
            else
            {
                d_normalImage.setImage( NULL ) ;
            }
            
            requestRedraw();
        }
        
    }

 

这个函数就可以更新图片了