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/* Copyright© 2000 - 2021 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import {Easing as AEasing} from './Easing';
/**
* @class SuperMap.LevelRenderer.Animation.Clip
* @category Visualization Theme
* @classdec 动画片段
* @private
*/
export class Clip {
/**
* @function SuperMap.LevelRenderer.Animation.Clip.prototype.constructor
* @description 构造函数。
* @param {Object} options - 参数。
* @param {Object} options.target - 动画对象，可以是数组，如果是数组的话会批量分发 onframe 等事件。
* @param {number} [options.life=1000] - 动画时长。
* @param {number} [options.delay=0] - 动画延迟时间。
* @param {boolean} [options.loop=true] - 是否循环。
* @param {number} [options.gap=0] - 循环的间隔时间。
* @param {Object} options.onframe - 帧。
* @param {boolean} options.easing - 是否消除。
* @param {boolean} options.ondestroy - 是否销毁。
* @param {boolean} options.onrestart - 是否重播。
*/
constructor(options) {
this._targetPool = options.target || {};
if (!(this._targetPool instanceof Array)) {
this._targetPool = [this._targetPool];
}
// 生命周期
this._life = options.life || 1000;
// 延时
this._delay = options.delay || 0;
// 开始时间
this._startTime = new Date().getTime() + this._delay;// 单位毫秒
// 结束时间
this._endTime = this._startTime + this._life * 1000;
// 是否循环
this.loop = typeof options.loop == 'undefined'
? false : options.loop;
this.gap = options.gap || 0;
this.easing = options.easing || 'Linear';
this.onframe = options.onframe;
this.ondestroy = options.ondestroy;
this.onrestart = options.onrestart;
this.CLASS_NAME = "SuperMap.LevelRenderer.Animation.Clip";
}
/**
* @function SuperMap.LevelRenderer.Animation.Clip.prototype.destroy
* @description 销毁对象，释放资源。调用此函数后所有属性将被置为 null。
*/
destroy() {
}
step(time) {
var easing = new AEasing();
var percent = (time - this._startTime) / this._life;
// 还没开始
if (percent < 0) {
return;
}
percent = Math.min(percent, 1);
var easingFunc = typeof this.easing == 'string'
? easing[this.easing]
: this.easing;
var schedule = typeof easingFunc === 'function'
? easingFunc(percent)
: percent;
this.fire('frame', schedule);
// 结束
if (percent == 1) {
if (this.loop) {
this.restart();
// 重新开始周期
// 抛出而不是直接调用事件直到 stage.update 后再统一调用这些事件
return 'restart';
}
// 动画完成将这个控制器标识为待删除
// 在Animation.update中进行批量删除
this._needsRemove = true;
return 'destroy';
}
return null;
}
restart() {
var time = new Date().getTime();
var remainder = (time - this._startTime) % this._life;
this._startTime = new Date().getTime() - remainder + this.gap;
}
fire(eventType, arg) {
for (var i = 0, len = this._targetPool.length; i < len; i++) {
if (this['on' + eventType]) {
this['on' + eventType](this._targetPool[i], arg);
}
}
}
}