102 lines
2.6 KiB
JavaScript
102 lines
2.6 KiB
JavaScript
/*
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* GDevelop JS Platform
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* Copyright 2013-2016 Florian Rival (Florian.Rival@gmail.com). All rights reserved.
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* This project is released under the MIT License.
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*/
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/**
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* Manage the timers and times elapsed during last
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* frame, since the beginning of the scene and other time related values.
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*
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* @class TimeManager
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* @memberof gdjs
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*/
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gdjs.TimeManager = function()
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{
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this.reset();
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}
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gdjs.TimeManager.prototype.reset = function() {
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this._elapsedTime = 0;
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this._timeScale = 1;
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this._timeFromStart = 0;
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this._firstFrame = true;
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this._timers = new Hashtable();
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}
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gdjs.TimeManager.prototype.update = function(elapsedTime, minimumFPS) {
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if (this._firstUpdateDone) this._firstFrame = false;
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this._firstUpdateDone = true;
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//Compute the elapsed time since last frame
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this._elapsedTime = Math.min(elapsedTime, 1000/minimumFPS);
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this._elapsedTime *= this._timeScale;
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//Update timers and others members
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for(var name in this._timers.items) {
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if (this._timers.items.hasOwnProperty(name)) {
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this._timers.items[name].updateTime(this._elapsedTime);
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}
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}
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this._timeFromStart += this._elapsedTime;
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};
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/**
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* Set the time scale: time will be slower if time scale is < 1,
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* faster if > 1.
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* @param {number} timeScale The new time scale (must be positive).
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*/
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gdjs.TimeManager.prototype.setTimeScale = function(timeScale) {
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if ( timeScale >= 0 ) this._timeScale = timeScale;
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};
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/**
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* Get the time scale.
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* @return {number} The time scale (positive, 1 is normal speed).
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*/
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gdjs.TimeManager.prototype.getTimeScale = function() {
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return this._timeScale;
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};
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/**
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* Get the time since the instanciation of the manager (i.e: since
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* the beginning of the scene most of the time), in milliseconds.
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*/
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gdjs.TimeManager.prototype.getTimeFromStart = function() {
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return this._timeFromStart;
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};
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/**
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* Return true if update was called only once (i.e: if the scene
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* is rendering its first frame).
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*/
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gdjs.TimeManager.prototype.isFirstFrame = function() {
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return this._firstFrame;
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};
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/**
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* Return the time elapsed since the last call to update
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* (i.e: the last frame), in milliseconds.
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*/
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gdjs.TimeManager.prototype.getElapsedTime = function() {
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return this._elapsedTime;
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};
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gdjs.TimeManager.prototype.addTimer = function(name) {
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this._timers.put(name, new gdjs.Timer(name));
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};
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gdjs.TimeManager.prototype.hasTimer = function(name) {
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return this._timers.containsKey(name);
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};
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gdjs.TimeManager.prototype.getTimer = function(name) {
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return this._timers.get(name);
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};
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gdjs.TimeManager.prototype.removeTimer = function(name) {
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if (this._timers.containsKey(name)) this._timers.remove(name);
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};
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