public void Add( ushort id, sbyte z )
{
if ( (m_Count + 1) > m_Tiles.Length )
{
StaticTile[] old = m_Tiles;
m_Tiles = new StaticTile[old.Length * 2];
for ( int i = 0; i < old.Length; ++i )
m_Tiles[i] = old[i];
}
m_Tiles[m_Count].m_ID = id;
m_Tiles[m_Count].m_Z = z;
++m_Count;
}