easing.qc

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#include "easing.qh"

#include "../menu.qh"
#include "keyframe.qh"

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

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

    METHOD(Easing, calcValue, float(entity this, float tickTime, float animDuration, float animStart, float animDelta))
    {
        return this.math(tickTime, animDuration, animStart, animDelta);
    }

    METHOD(Easing, setMath, void(entity this, float(float, float, float, float) func))
    {
        this.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));
    }