etc/octaspire_easing_amalgamated.c
double octaspire_easing_out_quad(double t, double const b, double const c, double const d)
{
    t /= d;
    return -c*t*(t-2) + b;
}
// quadratic easing out - decelerating to zero velocity
quadratic easing out - decelerating to zero velocity
quadratic easing out - decelerating to zero velocity
double octaspire_easing_out_quad(double t, double const b, double const c, double const d)
{
    t /= d;
    return -c*t*(t-2) + b;
}
double octaspire_easing_out_quad ( double t , double const b , double const c , double const d ) { t /= d ; return - c * t * ( t - 2 ) + b ; }
quadratic easing out - decelerating to zero velocity
quadratic easing out - decelerating to zero velocity