@phaserjs/phaser/math/interpolation/CubicBezierInterpolation.js

Phaser 4

/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2020 Photon Storm Ltd.
 * @license      {@link https://opensource.org/licenses/MIT|MIT License}
 */
function P0(t, p) {
  const k = 1 - t;
  return k * k * k * p;
}
function P1(t, p) {
  const k = 1 - t;
  return 3 * k * k * t * p;
}
function P2(t, p) {
  return 3 * (1 - t) * t * t * p;
}
function P3(t, p) {
  return t * t * t * p;
}
export function CubicBezierInterpolation(t, p0, p1, p2, p3) {
  return P0(t, p0) + P1(t, p1) + P2(t, p2) + P3(t, p3);
}