animation-loop/Clock.js

Easily make and manage animation loops.

"use strict";

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

var _assign = _interopRequireDefault(require("@babel/runtime/core-js/object/assign"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// Taken from Three.js, r92. See https://github.com/mrdoob/three.js

/**
 * The MIT License
 *
 * Copyright © 2010-2018 three.js authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * @author alteredq / http://alteredqualia.com/
 */
function Clock(autoStart) {
  this.autoStart = autoStart !== undefined ? autoStart : true;
  this.startTime = 0;
  this.oldTime = 0;
  this.elapsedTime = 0;
  this.running = false;
}

(0, _assign.default)(Clock.prototype, {
  start: function () {
    this.startTime = (typeof performance === 'undefined' ? Date : performance).now(); // see #10732

    this.oldTime = this.startTime;
    this.elapsedTime = 0;
    this.running = true;
  },
  stop: function () {
    this.getElapsedTime();
    this.running = false;
    this.autoStart = false;
  },
  getElapsedTime: function () {
    this.getDelta();
    return this.elapsedTime;
  },
  getDelta: function () {
    var diff = 0;

    if (this.autoStart && !this.running) {
      this.start();
      return 0;
    }

    if (this.running) {
      var newTime = (typeof performance === 'undefined' ? Date : performance).now();
      diff = (newTime - this.oldTime) / 1000;
      this.oldTime = newTime;
      this.elapsedTime += diff;
    }

    return diff;
  }
});
var _default = Clock;
exports.default = _default;