Function cubicBezier

src/utils/eye_shape.js:6–10

(P0, P1, P2, P3, t)

}

function cubicBezier(P0, P1, P2, P3, t) {
    var x = (1 - t) ** 3 * P0[0] + 3 * (1 - t) ** 2 * t * P1[0] + 3 * (1 - t) * t ** 2 * P2[0] + t ** 3 * P3[0];
    var y = (1 - t) ** 3 * P0[1] + 3 * (1 - t) ** 2 * t * P1[1] + 3 * (1 - t) * t ** 2 * P2[1] + t ** 3 * P3[1];
    return [x, y];
}

function generateEyeParameters(width) {
    let height_upper = Math.random() * width / 1.2;// Less height for the upper eyelid to make it sharper