public static SpawnRoot Instance(short objType, float radius, float targetRadius)
 {
     var key = new Tuple<short, float, float>(objType, radius, targetRadius);
     SpawnRoot ret;
     if (!instances.TryGetValue(key, out ret))
         ret = instances[key] = new SpawnRoot(objType, radius, targetRadius);
     return ret;
 }
        public static SpawnRoot Instance(short objType, float radius, float targetRadius)
        {
            var       key = new Tuple <short, float, float>(objType, radius, targetRadius);
            SpawnRoot ret;

            if (!instances.TryGetValue(key, out ret))
            {
                ret = instances[key] = new SpawnRoot(objType, radius, targetRadius);
            }
            return(ret);
        }