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This is the source code of Tween.Bounce.easeOut, I don't understand the constant 2.75, 7.5625, 0.75 and others... What is the derivation process？

  if (k < (1 / 2.75)) {
    return 7.5625 * k * k;
  } else if (k < (2 / 2.75)) {
    return 7.5625 * (k -= (1.5 / 2.75)) * k + 0.75;
  } else if (k < (2.5 / 2.75)) {
    return 7.5625 * (k -= (2.25 / 2.75)) * k + 0.9375;
  } else {
    return 7.5625 * (k -= (2.625 / 2.75)) * k + 0.984375;
  }
Jackie Lee
  • 19
  • 4

1 Answers1

0

This is Robert Penner Index.You can find the answer.

Jackie Lee
  • 19
  • 4