public void Generate()
	{
        Vector3 tmpPos;
        GameObject tree;

        /*
        System.Random r = new System.Random();
        for (int i = 0; i < 100; i++)
        {
            print((float)RandomExtensions.NextGaussian(r, this.waterMu, this.waterSigma));
        }
         * */

        System.DateTime d = System.DateTime.Now;

        if (this.waterTrees > 0 || this.dryTrees > 0 )
        {
            this.waterTreesQueue = new List<GameObject>(this.waterTrees);
            this.dryTreesQueue = new List<GameObject>(this.dryTrees);

            SpawnWater();
            SpawnDry();
            print("creation: " + (System.DateTime.Now - d));
            int rows = Mathf.RoundToInt(Mathf.Sqrt(this.waterTrees + this.dryTrees));
            int columns = rows;

            int indexX = Mathf.RoundToInt((this.gridWidth / rows));
            int indexY = Mathf.RoundToInt((this.gridHeight / columns));
            int startX = Mathf.RoundToInt((indexX / 2) - (this.gridWidth/2));
            int startY = Mathf.RoundToInt((indexY / 2) - (this.gridHeight/2));

            int randomLimitsX = Mathf.RoundToInt(indexX / 3);
            int randomLimitsY = Mathf.RoundToInt(indexY / 3);

            System.DateTime gt = System.DateTime.Now;
            for (int i = 0; i < rows; i++)
            {
                for (int j = 0; j < columns; j++)
                {
                    tmpPos = new Vector3(this.gridCenter.x + (Random.Range(-1 * randomLimitsX, randomLimitsX) + (startX + indexX * i)), 0f, this.gridCenter.y + Random.Range(-1 * randomLimitsY, randomLimitsY) + (startY + indexY * j));
                    float randVal = Random.value;

                    if (this.dryTreesQueue.Count == 0 || randVal < .5f)
                    {
                        if (this.waterTreesQueue.Count > 0)
                        {
                            tree = (GameObject)this.waterTreesQueue[0];
                            this.waterTreesQueue.RemoveAt(0);
                            tree.transform.position = tmpPos;
                        }
                    }
                    else if (this.waterTreesQueue.Count == 0 || randVal > .5f)
                    {
                        if (this.dryTreesQueue.Count > 0)
                        {
                            tree = (GameObject)this.dryTreesQueue[0];
                            this.dryTreesQueue.RemoveAt(0);
                            tree.transform.position = tmpPos;
                        }
                    }
                }
            }

            print("reposition: " + (System.DateTime.Now - gt));

            // clean up
            foreach (GameObject item in this.waterTreesQueue)
            {
                Destroy(item);
            }
            foreach (GameObject item in this.dryTreesQueue)
            {
                Destroy(item);
            }
        }
        else
        {
            this.errorText.text = "# of trees == 0";
        }

        print("Elapsed: " + (System.DateTime.Now - d));
	}