65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
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import easingFuncs from './easing.js';
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import { isFunction, noop } from '../core/util.js';
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import { createCubicEasingFunc } from './cubicEasing.js';
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var Clip = (function () {
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function Clip(opts) {
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this._inited = false;
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this._startTime = 0;
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this._pausedTime = 0;
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this._paused = false;
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this._life = opts.life || 1000;
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this._delay = opts.delay || 0;
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this.loop = opts.loop || false;
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this.onframe = opts.onframe || noop;
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this.ondestroy = opts.ondestroy || noop;
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this.onrestart = opts.onrestart || noop;
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opts.easing && this.setEasing(opts.easing);
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}
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Clip.prototype.step = function (globalTime, deltaTime) {
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if (!this._inited) {
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this._startTime = globalTime + this._delay;
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this._inited = true;
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}
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if (this._paused) {
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this._pausedTime += deltaTime;
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return;
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}
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var life = this._life;
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var elapsedTime = globalTime - this._startTime - this._pausedTime;
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var percent = elapsedTime / life;
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if (percent < 0) {
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percent = 0;
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}
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percent = Math.min(percent, 1);
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var easingFunc = this.easingFunc;
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var schedule = easingFunc ? easingFunc(percent) : percent;
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this.onframe(schedule);
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if (percent === 1) {
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if (this.loop) {
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var remainder = elapsedTime % life;
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this._startTime = globalTime - remainder;
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this._pausedTime = 0;
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this.onrestart();
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}
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else {
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return true;
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}
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}
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return false;
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};
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Clip.prototype.pause = function () {
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this._paused = true;
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};
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Clip.prototype.resume = function () {
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this._paused = false;
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};
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Clip.prototype.setEasing = function (easing) {
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this.easing = easing;
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this.easingFunc = isFunction(easing)
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? easing
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: easingFuncs[easing] || createCubicEasingFunc(easing);
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};
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return Clip;
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}());
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export default Clip;
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