Lightning Launcher

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====== About the script ======
  * Purpose : This is a customizable wheel of items. 
  * Author : [[https://plus.google.com/u/1/105066926163073195690|TrianguloY]]
  * Link: https://plus.google.com/u/1/105066926163073195690/posts/dMG96rAsFt6

====== How to use the script ======

Settings:
  * - X position: -1 left ; 0 center ; 1 right
  * - Y position: -1 bottom ; 0 center ; 1 top
  * - Rotation: the rotation the items will have relative to itself (recommended 0 or 180)
  * - Sensitivity: the velocity of rotating (the more, the faster)

Instructions:
  * copy paste the script.
  * set it in the 'position changed' of the panel (or desktop).
  * IMPORTANT: pin the items, and detach them from the grid.
  * In the panel settings, check the 'no scroll limit' under scroll options.
  * Wheeeeeeeel

This script will use all the items in the container, that's why I recommend to use a panel.

====== Script code ======
<code>
/*Config: */
var h = 0; //horizontal alignment (-1 , 0 , 1 )
var v = -1; //vertical alignment ( -1 , 0 , 1 )
var r = 0; //rotation offset ( 0 = default) in angles, not very implemented (0 or 180 recommended)
var f = 2; //sensitivity





var event = LL.getEvent();
var desktop = event.getContainer();
var a = desktop.getItems();
var na = a.getLength();

var radius = Math.min( desktop.getHeight()/ (v==0?4:2) , desktop.getWidth()/ (h==0?4:2) );

var alt = 0.5;
var size = [ radius*(2-alt)*Math.PI/na , radius*2 ];

var desf = (desktop.getPositionX()*(v>0?-1:1)+desktop.getPositionY()*(h>0?-1:1) )*Math.PI/desktop.getWidth();
desf*=f;

for ( var i=0; i<na; i+=1 ) { 
	var angle = Math.PI*2*i/na-desf;
	
	var x = Math.cos( angle -Math.PI/2 ) * radius;
	var y = Math.sin( angle -Math.PI/2 ) * radius;
	
	var rot = angle*180/Math.PI+r;
	
	x+= (h<0? 0 : desktop.getWidth()/ (h==0? 2 : 1) ) ;
	y+= (v>0? 0 : desktop.getHeight()/ (v==0? 2 : 1) );
	x-= size[0]/2;
	y-= size[1]/2;
	

	var t = a.getAt(i);
	t.setRotation(0);
	t.setSize(size[0] ,size[1]);
	t.setPosition(x, y);
	t.setRotation(rot);

}
</code>
Lightning Launcher

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