@shopify/react-native-skia/lib/commonjs/animation/timing/functions/timing.js

High-performance React Native Graphics using Skia

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.timing = void 0;

/**
 * Calculates and returns a timing value based on the
 * input parameters. The timing value is a number between
 * 0 and 1.
 * @param t
 * @param duration
 * @param easing
 * @param loop
 * @param yoyo
 * @param onStop
 * @returns
 */
const timing = (t, duration, easing, loop, yoyo, state) => {
  let current = t / duration;
  let {
    finished
  } = state; // Side effect to stop animation when duration is reached (if loop is false)

  if (current >= 1.0 && !loop) {
    finished = true;
    current = 1.0;
  } // calculate return value


  let n = current % 1;

  if (yoyo) {
    n = current % 2.0 >= 1.0 ? 1 - current % 1 : current % 1;
  } else if (!loop) {
    if (current >= 1.0) {
      n = 1.0;
    }
  }

  current = easing(Math.max(0, Math.min(1, n)));
  return {
    current,
    finished
  };
};

exports.timing = timing;
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