#ifndef ANIM_EASING_H
#define ANIM_EASING_H
#include "animation.qc"
entity makeHostedEasing(entity, void(entity, float), float(float, float, float, float), float, float, float);
entity makeEasing(entity, void(entity, float), float(float, float, float, float), float, float, float, float);
float easingLinear(float, float, float, float);
float easingQuadIn(float, float, float, float);
float easingQuadOut(float, float, float, float);
float easingQuadInOut(float, float, float, float);
CLASS(Easing, Animation)
	METHOD(Easing, calcValue, float(entity, float, float, float, float));
	METHOD(Easing, setMath, void(entity, float(float, float, float, float)));
	ATTRIB(Easing, math, float(float, float, float, float), easingLinear)
ENDCLASS(Easing)
#endif

#ifdef IMPLEMENTATION
entity makeHostedEasing(entity obj, void(entity, float) objSetter, float(float, float, float, float) func, float animDuration, float animStartValue, float animEnd)
{
	entity me;
	me = makeEasing(obj, objSetter, func, time, animDuration, animStartValue, animEnd);
	anim.addAnim(anim, me);
	return me;
}

entity makeEasing(entity obj, void(entity, float) objSetter, float(float, float, float, float) func, float animStartTime, float animDuration, float animStartValue, float animEnd)
{
	entity me;
	me = NEW(Easing);
	me.configureAnimation(me, obj, objSetter, animStartTime, animDuration, animStartValue, animEnd);
	me.setMath(me, func);
	return me;
}

float Easing_calcValue(entity me, float tickTime, float animDuration, float animStart, float animDelta)
{
	return me.math(tickTime, animDuration, animStart, animDelta);
}

void Easing_setMath(entity me, float(float, float, float, float) func)
{
	me.math = func;
}

float easingLinear(float tickTime, float animDuration, float animStart, float animDelta)
{
	return (animDelta * (tickTime / animDuration)) + animStart;
}

float easingQuadIn(float tickTime, float animDuration, float animStart, float animDelta)
{
	float frac = tickTime / animDuration;
	return (animDelta * frac * frac) + animStart;
}

float easingQuadOut(float tickTime, float animDuration, float animStart, float animDelta)
{
	float frac = tickTime / animDuration;
	return (-animDelta * frac * (frac - 2)) + animStart;
}

float easingQuadInOut(float tickTime, float animDuration, float animStart, float animDelta)
{
	if (tickTime < (animDuration / 2))
	{
		return easingQuadIn(tickTime, (animDuration / 2), animStart, (animDelta / 2));
	}
	else
	{
		return easingQuadOut((tickTime - (animDuration / 2)), (animDuration / 2), (animStart + (animDelta / 2)), (animDelta / 2));
	}
}

#endif