void ofxPenner::update() {
float t = ofGetElapsedTimef();
for (map<int,parameter>::iterator iter=params.begin(); iter!=params.end(); iter++) {
parameter &p = iter->second;
if (p.bEasing) {
float delta = t-p.time;
if (delta<p.duration) {
switch (p.ease_function) {
case EASE_OUT_BACK:
p.v = easeOutBack(delta, p.b, p.c, p.duration);
break;
case EASE_OUT_QUAD:
p.v = easeOutQuad(delta, p.b, p.c, p.duration);
default:
break;
}
} else {
p.v = p.e;
p.bEasing = false;
}
}
}
}
/**
* Easing equation function for a quadratic (t^2) easing out/in: deceleration until halfway, then acceleration.
*
* @param t Current time (in frames or seconds).
* @return The correct value.
*/
static qreal easeOutInQuad(qreal t)
{
if (t < 0.5) return easeOutQuad (t*2)/2;
return easeInQuad((2*t)-1)/2 + 0.5;
}