bd028579
 易尊强
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import easingFuncs from './easing.js';
import { isFunction, noop } from '../core/util.js';
import { createCubicEasingFunc } from './cubicEasing.js';
var Clip = (function () {
function Clip(opts) {
this._inited = false;
this._startTime = 0;
this._pausedTime = 0;
this._paused = false;
this._life = opts.life || 1000;
this._delay = opts.delay || 0;
this.loop = opts.loop || false;
this.onframe = opts.onframe || noop;
this.ondestroy = opts.ondestroy || noop;
this.onrestart = opts.onrestart || noop;
opts.easing && this.setEasing(opts.easing);
}
Clip.prototype.step = function (globalTime, deltaTime) {
if (!this._inited) {
this._startTime = globalTime + this._delay;
this._inited = true;
}
if (this._paused) {
this._pausedTime += deltaTime;
return;
}
var life = this._life;
var elapsedTime = globalTime - this._startTime - this._pausedTime;
var percent = elapsedTime / life;
if (percent < 0) {
percent = 0;
}
percent = Math.min(percent, 1);
var easingFunc = this.easingFunc;
var schedule = easingFunc ? easingFunc(percent) : percent;
this.onframe(schedule);
if (percent === 1) {
if (this.loop) {
var remainder = elapsedTime % life;
this._startTime = globalTime - remainder;
this._pausedTime = 0;
this.onrestart();
}
else {
return true;
}
}
return false;
};
Clip.prototype.pause = function () {
this._paused = true;
};
Clip.prototype.resume = function () {
this._paused = false;
};
Clip.prototype.setEasing = function (easing) {
this.easing = easing;
this.easingFunc = isFunction(easing)
? easing
: easingFuncs[easing] || createCubicEasingFunc(easing);
};
return Clip;
}());
export default Clip;
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