/// <summary>
/// Establish a relation with a neighboring map cell
/// </summary>
/// <param name="neighbor">Neighboring map cell</param>
/// <param name="deltaX">X coordinate offset to the neighbor</param>
/// <param name="deltaY">Y coordinate offset to the neighbor</param>
public void SetNeighbor(MapCell neighbor, int deltaX, int deltaY)
{
if (neighbor != null)
{
int borderIndex = HexBorder.ConvertDeltaToBorderIndex(deltaX, deltaY, _data.x % 2 == 1);
if (neighbor.GetProvinceId() == GetProvinceId())
{
// if the neighboring map cell belongs to the same province,
// there should be no border between them, so
// set the corresponding bit to zero
int index = 1 << borderIndex;
_provinceBordersIndex = _provinceBordersIndex ^ index;
}
else
{
_province.AddNeighbor(neighbor.GetProvince());
neighbor.GetProvince().AddNeighbor(_province);
}
}
}