function initARRAY(){

    aAr = new ArrayBuffer( ArMax * Float32Array.BYTES_PER_ELEMENT );
    Ar = new Float32Array( aAr );

   // console.log(aAr.byteLength)

}
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   @author lo.th / http://lo-th.github.io/labs/
   AMMO worker ultimate

   By default, Bullet assumes units to be in meters and time in seconds. 
   Moving objects are assumed to be in the range of 0.05 units, about the size of a pebble, 
   to 10, the size of a truck. 
   The simulation steps in fraction of seconds (1/60 sec or 60 hertz), 
   and gravity in meters per square second (9.8 m/s^2).