1 /****************************************************************************
  2  Copyright (c) 2010-2012 cocos2d-x.org
  3  Copyright (c) 2008-2010 Ricardo Quesada
  4  Copyright (c) 2011      Zynga Inc.
  5 
  6  http://www.cocos2d-x.org
  7 
  8  Permission is hereby granted, free of charge, to any person obtaining a copy
  9  of this software and associated documentation files (the "Software"), to deal
 10  in the Software without restriction, including without limitation the rights
 11  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 12  copies of the Software, and to permit persons to whom the Software is
 13  furnished to do so, subject to the following conditions:
 14 
 15  The above copyright notice and this permission notice shall be included in
 16  all copies or substantial portions of the Software.
 17 
 18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 19  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 20  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 21  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 22  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 23  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 24  THE SOFTWARE.
 25  ****************************************************************************/
 26 
 27 cc.UIInterfaceOrientationLandscapeLeft = -90;
 28 
 29 cc.UIInterfaceOrientationLandscapeRight = 90;
 30 
 31 cc.UIInterfaceOrientationPortraitUpsideDown = 180;
 32 
 33 cc.UIInterfaceOrientationPortrait = 0;
 34 
 35 /**
 36  * he device accelerometer reports values for each axis in units of g-force
 37  */
 38 cc.Acceleration = function (x, y, z, timestamp) {
 39     this.x = x || 0;
 40     this.y = y || 0;
 41     this.z = z || 0;
 42     this.timestamp = timestamp || 0;
 43 };
 44 
 45 /**
 46  * @class
 47  * @extends cc.Class
 48  */
 49 cc.Accelerometer = cc.Class.extend(/** @lends cc.Accelerometer# */{
 50     setDelegate: function (delegate) {
 51         cc.AccelerometerDispatcher.getInstance().addDelegate(delegate);
 52     },
 53     setAccelerometerInterval: function (interval) {
 54         cc.AccelerometerDispatcher.getInstance().setAccelerometerInterval(interval);
 55     }
 56 });
 57 
 58 /**
 59  *
 60  * The cc.AccelerometerDelegate defines a single method for
 61  * receiving acceleration-related data from the system.
 62  * @class
 63  * @extends cc.Class
 64  */
 65 cc.AccelerometerDispatcher = cc.Class.extend(/** @lends cc.AccelerometerDispatcher# */{
 66     _delegate: null,
 67     _acceleration: null,
 68     _deviceEvent: null,
 69     _interval: 1/30,
 70     _minus: 1,
 71     _curTime:0,
 72     init: function () {
 73         this._acceleration = new cc.Acceleration();
 74         var w = window;
 75         this._deviceEvent = w.DeviceMotionEvent || w.DeviceOrientationEvent;
 76 
 77         //TODO fix DeviceMotionEvent bug on QQ Browser version 4.1 and below.
 78         if (cc.Browser.type == "mqqbrowser") {
 79             this._deviceEvent = window.DeviceOrientationEvent;
 80         }
 81 
 82         this._deviceEventType = (this._deviceEvent == w.DeviceMotionEvent) ? "devicemotion" : "deviceorientation";
 83         var ua = navigator.userAgent;
 84         if (/Android/.test(ua) || (/Adr/.test(ua) && cc.Browser.type == "ucbrowser")) {
 85             this._minus = -1;
 86         }
 87     },
 88 
 89     getDelegate: function () {
 90         return this._delegate;
 91     },
 92 
 93     addDelegate: function (delegate) {
 94         this._delegate = delegate;
 95         var acc = this.didAccelerate.bind(this), w = window, scheduler = cc.Director.getInstance().getScheduler();
 96         if (this._delegate) {
 97             w.addEventListener(this._deviceEventType, acc, false);
 98             scheduler.scheduleUpdateForTarget(this);
 99         } else {
100             w.removeEventListener(this._deviceEventType, acc);
101             scheduler.unscheduleUpdateForTarget(this);
102         }
103     },
104 
105     setAccelerometerInterval: function (interval) {
106         if (this._interval !== interval) {
107             this._interval = interval;
108         }
109     },
110 
111     didAccelerate: function (eventData) {
112         if (!this._delegate) {
113             return;
114         }
115 
116         var mAcceleration = this._acceleration;
117         if (this._deviceEvent == window.DeviceMotionEvent) {
118             var eventAcceleration = eventData.accelerationIncludingGravity;
119             mAcceleration.x = this._minus * eventAcceleration.x * 0.1;
120             mAcceleration.y = this._minus * eventAcceleration.y * 0.1;
121             mAcceleration.z = eventAcceleration.z * 0.1;
122         }
123         else {
124             mAcceleration.x = (eventData.gamma / 90) * 0.981;
125             mAcceleration.y = -(eventData.beta / 90) * 0.981;
126             mAcceleration.z = (eventData.alpha / 90) * 0.981;
127         }
128         mAcceleration.timestamp = eventData.timeStamp || Date.now();
129 
130         var tmpX = mAcceleration.x;
131         switch (window.orientation) {
132             case cc.UIInterfaceOrientationLandscapeRight://-90
133                 mAcceleration.x = -mAcceleration.y;
134                 mAcceleration.y = tmpX;
135                 break;
136 
137             case cc.UIInterfaceOrientationLandscapeLeft://90
138                 mAcceleration.x = mAcceleration.y;
139                 mAcceleration.y = -tmpX;
140                 break;
141 
142             case cc.UIInterfaceOrientationPortraitUpsideDown://180
143                 mAcceleration.x = -mAcceleration.x;
144                 mAcceleration.y = -mAcceleration.y;
145                 break;
146 
147             case cc.UIInterfaceOrientationPortrait://0
148                 break;
149         }
150     },
151     update:function(dt){
152         if(this._curTime > this._interval){
153             this._curTime -= this._interval;
154             this._delegate.onAccelerometer(this._acceleration);
155         }
156         this._curTime += dt;
157     }
158 });
159 
160 cc.AccelerometerDispatcher.getInstance = function () {
161     if (!this._instance) {
162         this._instance = new cc.AccelerometerDispatcher();
163         this._instance.init();
164     }
165 
166     return this._instance;
167 };