multimediaobject/src/utils/easings.js

Multimediaobject library

/* eslint-disable */
export const linearEase = (currentIteration, startValue, changeInValue, totalIterations) => changeInValue * currentIteration / totalIterations + startValue;
export const easeInQuad = (t, b, c, d) => c * (t /= d) * t + b;
export const easeOutQuad = (t, b, c, d) => -c * (t /= d) * (t - 2) + b;
export const easeInOutQuad = (t, b, c, d) => {
  if ((t /= d / 2) < 1) return c / 2 * t * t + b;
  return -c / 2 * ((--t) * (t - 2) - 1) + b;
};
export const easeInCubic = (t, b, c, d) => c * (t /= d) * t * t + b;
export const easeOutCubic = (t, b, c, d) => c * ((t = t / d - 1) * t * t + 1) + b;
export const easeInOutCubic = (t, b, c, d) => {
  if ((t /= d / 2) < 1) return c / 2 * t * t * t + b;
  return c / 2 * ((t -= 2) * t * t + 2) + b;
};
export const easeInQuart = (t, b, c, d) => c * (t /= d) * t * t * t + b;
export const easeOutQuart = (t, b, c, d) => -c * ((t = t / d - 1) * t * t * t - 1) + b;
export const easeInOutQuart = (t, b, c, d) => {
  if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b;
  return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
};
export const easeInQuint = (t, b, c, d) => c * (t /= d) * t * t * t * t + b;
export const easeOutQuint = (t, b, c, d) => c * ((t = t / d - 1) * t * t * t * t + 1) + b;
export const easeInOutQuint = (t, b, c, d) => {
  if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
  return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
};
export const easeInSine = (t, b, c, d) => -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
export const easeOutSine = (t, b, c, d) => c * Math.sin(t / d * (Math.PI / 2)) + b;
export const easeInOutSine = (t, b, c, d) => -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
export const easeInExpo = (t, b, c, d) => (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b;
export const easeOutExpo = (t, b, c, d) => (t == d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
export const easeInOutExpo = (t, b, c, d) => {
  if (t == 0) return b;
  if (t == d) return b + c;
  if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
  return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
};
export const easeInCirc = (t, b, c, d) => -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
export const easeOutCirc = (t, b, c, d) => c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
export const easeInOutCirc = (t, b, c, d) => {
  if ((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
  return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
};
export const easeInElastic = (t, b, c, d) => {
  var s = 1.70158; let p = 0; let a = c;
  if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * 0.3;
  if (a < Math.abs(c)) { a = c; var s = p / 4; } else var s = p / (2 * Math.PI) * Math.asin(c / a);
  return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
};
export const easeOutElastic = (t, b, c, d) => {
  var s = 1.70158; let p = 0; let a = c;
  if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * 0.3;
  if (a < Math.abs(c)) { a = c; var s = p / 4; } else var s = p / (2 * Math.PI) * Math.asin(c / a);
  return a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b;
};
export const easeInOutElastic = (t, b, c, d) => {
  var s = 1.70158; let p = 0; let a = c;
  if (t == 0) return b; if ((t /= d / 2) == 2) return b + c; if (!p) p = d * (0.3 * 1.5);
  if (a < Math.abs(c)) { a = c; var s = p / 4; } else var s = p / (2 * Math.PI) * Math.asin(c / a);
  if (t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
  return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * 0.5 + c + b;
};
export const easeInBack = (t, b, c, d, s) => {
  if (s == undefined) s = 1.70158;
  return c * (t /= d) * t * ((s + 1) * t - s) + b;
};
export const easeOutBack = (t, b, c, d, s) => {
  if (s == undefined) s = 1.70158;
  return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
};
export const easeInOutBack = (t, b, c, d, s) => {
  if (s == undefined) s = 1.70158;
  if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
  return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
};
export const easeInBounce = (t, b, c, d) => c - easeOutBounce(d - t, 0, c, d) + b;
export const easeOutBounce = (t, b, c, d) => {
  if ((t /= d) < (1 / 2.75)) {
    return c * (7.5625 * t * t) + b;
  } else if (t < (2 / 2.75)) {
    return c * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75) + b;
  } else if (t < (2.5 / 2.75)) {
    return c * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375) + b;
  }
  return c * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375) + b;
};
export const easeInOutBounce = (t, b, c, d) => {
  if (t < d / 2) return easeInBounce(t * 2, 0, c, d) * 0.5 + b;
  return easeOutBounce(t * 2 - d, 0, c, d) * 0.5 + c * 0.5 + b;
};