Approximated penner equations for cubic-bezier css animation easings

_cubic-bezier-easings.scss

///////////////////////////////////////////
// Animation Cubic Bezier easings        //
// see - http://matthewlein.com/ceaser   //
///////////////////////////////////////////

// defaults
$ease-linear:          "cubic-bezier(0.250, 0.250, 0.750, 0.750)";
$ease-default:         "cubic-bezier(0.250, 0.100, 0.250, 1.000)";
$ease-in:              "cubic-bezier(0.420, 0.000, 1.000, 1.000)";
$ease-out:             "cubic-bezier(0.000, 0.000, 0.580, 1.000)";
$ease-in-out:          "cubic-bezier(0.420, 0.000, 0.580, 1.000)";

// penner equations (approximated)
$ease-in-quad:         "cubic-bezier(0.550, 0.085, 0.680, 0.530)";
$ease-in-cubic:        "cubic-bezier(0.550, 0.055, 0.675, 0.190)";
$ease-in-quart:        "cubic-bezier(0.895, 0.030, 0.685, 0.220)";
$ease-in-quint:        "cubic-bezier(0.755, 0.050, 0.855, 0.060)";
$ease-in-sine:         "cubic-bezier(0.470, 0.000, 0.745, 0.715)";
$ease-in-expo:         "cubic-bezier(0.950, 0.050, 0.795, 0.035)";
$ease-in-circ:         "cubic-bezier(0.600, 0.040, 0.980, 0.335)";
$ease-in-back:         "cubic-bezier(0.600, -0.280, 0.735, 0.045)";

$ease-out-quad:        "cubic-bezier(0.250, 0.460, 0.450, 0.940)";
$ease-out-cubic:       "cubic-bezier(0.215, 0.610, 0.355, 1.000)";
$ease-out-quart:       "cubic-bezier(0.165, 0.840, 0.440, 1.000)";
$ease-out-quint:       "cubic-bezier(0.230, 1.000, 0.320, 1.000)";
$ease-out-sine:        "cubic-bezier(0.390, 0.575, 0.565, 1.000)";
$ease-out-expo:        "cubic-bezier(0.190, 1.000, 0.220, 1.000)";
$ease-out-circ:        "cubic-bezier(0.075, 0.820, 0.165, 1.000)";
$ease-out-back:        "cubic-bezier(0.175, 0.885, 0.320, 1.275)";

$ease-in-out-quad:     "cubic-bezier(0.455, 0.030, 0.515, 0.955)";
$ease-in-out-cubic:    "cubic-bezier(0.645, 0.045, 0.355, 1.000)";
$ease-in-out-quart:    "cubic-bezier(0.770, 0.000, 0.175, 1.000)";
$ease-in-out-quint:    "cubic-bezier(0.860, 0.000, 0.070, 1.000)";
$ease-in-out-sine:     "cubic-bezier(0.445, 0.050, 0.550, 0.950)";
$ease-in-out-expo:     "cubic-bezier(1.000, 0.000, 0.000, 1.000)";
$ease-in-out-circ:     "cubic-bezier(0.785, 0.135, 0.150, 0.860)";
$ease-in-out-back:     "cubic-bezier(0.680, -0.550, 0.265, 1.550)";