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====== Differences ====== This shows you the differences between two versions of the page.

--- script_parallax_wallpaper [2014/10/12 11:38]
trianguloy created
+++ script_parallax_wallpaper [2018/08/14 16:39] (current)
f43nd1r fix link
@@ Line 1: / Line 1: @@
 ====== About the script ======
   * Purpose : Background wallpaper that moves with accelerometer (parallax effect) The script takes the accelerometer values and place the item accordingly. It is size-dependent so the bigger the item is the more it will move. (Items smaller that the screen size will move a bit odd)
-  * Author : [[https://plus.google.com/u/1/105066926163073195690|TrianguloY]] with the help of [[https://plus.google.com/+LukasMorawietz|LM13]]. All the new bind class, and accelerometer events code was made by Lukas (also some suggestions), the position computation, tags and relative is mine.
+  * Author : [[https://plus.google.com/u/1/105066926163073195690|TrianguloY]] with the help of F43nd1r. All the new bind class, and accelerometer events code was made by Lukas (also some suggestions), the position computation, tags and relative is mine.
-  * Link: https://plus.google.com/u/1/105066926163073195690/posts/XqiqsFmcnDS
+  * Link: https://plus.google.com/+TrianguloY/posts/XqiqsFmcnDS
 ====== How to use the script ======
@@ Line 22: / Line 22: @@
 Note: I needed to add a small code to avoid the '0-size' bug. If you get an error when the container is loaded just turn off/on the screen. Also I couldn't test it myself long enough. If you get an error or it don't work as expected write a comment.
+Version 2: now it works on portrait and landscape
 ====== Script code ======
+**New version**
+<sxh javascript>
+//Version 2
+var delta=0.04;//between (0,1], to avoid shaking due to accelerometer fast changes ( try low values like 0.1)
+var threshold=0;//minimum pixels required to move it, if it shakes when the device rest (try 1,2...)
+var accuracy=1; //accuracy of the Sensor. 0 is the fastest but can consume a bit more battery. 3 is battery-friendly, but can be slower. 1 and 2 are a medium value. Default 1
+var tablet = false; //set this to true if your device is a tablet or if the item is moving vertical instead of horizontal and the opposite
+var data=LL.getEvent().getData();
+if(data=="")data=null;
+var gyro=LL.getEvent().getItem()||LL.getItemById(data||-1);
+if(gyro==null){
+alert("run this script from an item");
+return;
+}
+var source=LL.getEvent().getSource();
+//disable when desired
+if(source!="I_RESUMED" && data==null)
+{
+gyro.setTag("parallax",null);
+return;
+}
+var cont=gyro.getParent();
+//small tweak to avoid strange bugs that happen when the script is run directly
+//this only runs itself
+if(gyro.getTag("parallax")!="repeat"&&cont.getHeight()==0){
+gyro.setTag("parallax","repeat");
+var name=LL.getCurrentScript().getName();
+setTimeout(function(){LL.runScript(name,gyro.getId())},0);
+return;
+}
+var token=Math.random();
+while(token==gyro.getTag("parallax"))token=Math.random();
+gyro.setTag("parallax",token);
+var g=[gyro.getWidth()*gyro.getScaleX()-cont.getWidth(),gyro.getHeight()*gyro.getScaleY()-cont.getHeight()];
+var portrait=cont.getWidth()<cont.getHeight();
+var xy=[,];
+LL.bindClass("android.hardware.Sensor");
+LL.bindClass("android.hardware.SensorEventListener");
+LL.bindClass("android.hardware.SensorManager");
+var sm = LL.getContext().getSystemService(Context.SENSOR_SERVICE);
+var orientation = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
+var i = {
+  onAccuracyChanged: function(sensor,accuracy){},
+  onSensorChanged: function(event) {
+if(LL.isPaused()){
+gyro.setTag("parallax",null);
+sm.unregisterListener(l);
+return;
+}
+if(gyro.getTag("parallax")!=token){
+sm.unregisterListener(l);
+return;
+}
+if(portrait!=(cont.getWidth()<cont.getHeight())){
+sm.unregisterListener(l);
+cont.setTag("parallax",null);
+var name=LL.getCurrentScript().getName();
+setTimeout(function(){LL.runScript(name,gyro.getId())},0);
+return;
+}
+if(portrait!=tablet){
+var v=[-event.values[0],event.values[1]];
+}else{
+var v=[event.values[1],event.values[0]];
+}
+var x=(v[0]+10)/20;
+var y=(v[1]+10)/20;
+if(xy[0]==null)xy=[x,y];
+x=(x>1)?1:(x<0)?0:x;
+y=(y>1)?1:(y<0)?0:y
+//var flags=[true,true];
+if(Math.abs(x-xy[0])*delta*g[0]<threshold)x=xy[0];
+if(Math.abs(y-xy[1])*delta*g[1]<threshold)y=xy[1];
+xy=[xy[0]+(x-xy[0])*delta,xy[1]+(y-xy[1])*delta];
+gyro.setPosition(-g[0]*xy[0],-g[1]*xy[1]);
+}
+};
+var l = new SensorEventListener(i);
+sm.registerListener(l, orientation,accuracy);
+</sxh>
+**Old version**
 <sxh javascript>

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