etc/octaspire_easing_amalgamated.c
double octaspire_easing_out_quint(double t, double const b, double const c, double const d)
{
    t = (t / d) -1;
    return c*((t*t*t*t*t) + 1) + b;
}
// quintic easing out - decelerating to zero velocity
quintic easing out - decelerating to zero velocity
quintic easing out - decelerating to zero velocity
double octaspire_easing_out_quint(double t, double const b, double const c, double const d)
{
    t = (t / d) -1;
    return c*((t*t*t*t*t) + 1) + b;
}
double octaspire_easing_out_quint ( double t , double const b , double const c , double const d ) { t = ( t / d ) - 1 ; return c * ( ( t * t * t * t * t ) + 1 ) + b ; }
quintic easing out - decelerating to zero velocity
quintic easing out - decelerating to zero velocity