public void AddClusterToArray(int row, int column, Cluster cluster)
{
if (m_ClustersArray == null)
{
m_ClustersArray = new Cluster[m_NumberOfClusterRow, m_NumberOfClusterColumn];
}
Debug.Log("row = " + row + " / column = " + column);
m_ClustersArray [row, column] = cluster;
cluster.SetGridRow(row);
cluster.SetGridColumn(column);
cluster.AddChildTiles();
}