public static void Draw(OC.Cell cell)
        {
            Gizmos.color = Color.green;
            var center = cell.aabb.center;

            Gizmos.DrawWireCube(center, cell.aabb.size);
        }
        public void GenerateCells(Bounds aabb, float cellSize)
        {
            int countX = Mathf.CeilToInt(aabb.size.x / cellSize);
            int countY = Mathf.CeilToInt(aabb.size.y / cellSize);
            int countZ = Mathf.CeilToInt(aabb.size.z / cellSize);

            for (int k = 0; k < countY; k++)
            {
                for (int j = 0; j < countZ; j++)
                {
                    for (int i = 0; i < countX; i++)
                    {
                        OC.Cell cell   = new OC.Cell(null);
                        Vector3 center = new Vector3(cellSize * (i + 0.5f), cellSize * (k + 0.5f), cellSize * (j + 0.5f));
                        center += aabb.min;
                        Vector3 size     = new Vector3(cellSize, cellSize, cellSize);
                        Bounds  cellAABB = new Bounds(center, size);
                        cell.aabb = cellAABB;
                        cellList.Add(cell);
                    }
                }
            }
        }