float PathAnimation::progress()
{
float progress = AbstractAnimation::progress();
switch(easing_)
{
case Easing::Linear:
{
return progress;
break;
}
case Easing::InOutQuint:
{
return easeInOutQuint(progress, 0.0f, progress, 1.0f);
break;
}
case Easing::InQuint:
{
return easeInQuint(progress, 0.0f, progress, 1.0f);
break;
}
case Easing::OutQuint:
{
return easeOutQuint(progress, 0.0f, progress, 1.0f);
break;
}
case Easing::OutElastic:
{
return easeOutElastic(progress);
break;
}
}
// "backup" return value
return progress;
}
/**
* Easing equation function for a quintic (t^5) easing out/in: deceleration until halfway, then acceleration.
*
* @param t Current time (in frames or seconds).
* @return The correct value.
*/
static qreal easeOutInQuint(qreal t)
{
if (t < 0.5) return easeOutQuint (2*t)/2;
return easeInQuint(2*t - 1)/2 + 0.5;
}