A new animation mode, EaseOutIn, could be possible to implement by leveraging just what's we have so far

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For every equation (Sine,Expo,Quint..) we have defined:

- easeIn
- easeOut
- easeInOut

Based on my template usage suggestion, we could extend the Animation mode:

enum
{
    EaseIn,
    EaseOut,
    EaseInOut,
    EaseOutIn
}

Then, assuming we have these variables setup this way:

iFrom = from:
iTo = to;
iDistance = to-from;

and let b=from and c=distance, now we can extend the switch statement this way:

template< class T, int mode >
float ease( float lastFrameTime )
{
    ...
    float ret = iFrom;
    switch( mode )
    {
        case EaseIn:
        {
            ret = T::easeIn( t, b, c, d );
            break;
        }
        case EaseOut:
        {
            ret = T::easeOut( t, b, c, d );
            break;
        }
        case EaseIn:
        {
            ret = T::easeInOut( t, b, c, d );
            break;
        }
        case EaseOutIn:
        {
            float halfDistance = iDistance / 2.f;
            if ( iTimeAccu < iDurationSecs / 2 )
                ret = T::easeOut( t * 2, b, halfDistance, d );
            else
                ret = T::easeIn( ( t * 2 ) - d, b + halfDistance, halfDistance, d );
            break;
        }
    }

    return ret;
}

Original issue reported on code.google.com by manuel....@gmail.com on 14 Feb 2010 at 4:03

Attachments:

• animator.h