JAME.Package('JAME.FX.Transition.Back');

JAME.FX.Transition.Back={
    In : function (t, b, c, d, s) {
        if (s == undefined) s = 1.70158;
        return c*(t/=d)*t*((s+1)*t - s) + b;
    },
    Out : function (t, b, c, d, s) {
        if (s == undefined) s = 1.70158;
        return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
    },
    InOut : function (t, b, c, d, s) {
       if (s == undefined) s = 1.70158; 
       if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
       return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
    }
};