public SoftBody this[int index]
 {
     get
     {
         if ((uint)index >= (uint)Count)
         {
             throw new ArgumentOutOfRangeException("index");
         }
         return(CollisionObject.GetManaged(btAlignedObjectArray_btSoftBodyPtr_at(_native, index)) as SoftBody);
     }
     set
     {
         throw new NotImplementedException();
     }
 }