public override void Link(Cell cell, bool bidirectional = true)
{
var overcell = (OverCell)cell;
OverCell neighbor = null;
if (North != null && North == overcell.South)
{
neighbor = (OverCell)North;
}
if (South != null && South == overcell.North)
{
neighbor = (OverCell)South;
}
if (East != null && East == overcell.West)
{
neighbor = (OverCell)East;
}
if (West != null && West == overcell.East)
{
neighbor = (OverCell)West;
}
if (neighbor != null)
{
_grid.TunnelUnder(neighbor);
}
else
{
base.Link(cell, bidirectional);
}
}
public UnderCell(OverCell overCell) : base(overCell.Row, overCell.Column, null)
{
if (overCell.HorizontalPassage)
{
North = overCell.North;
overCell.North.South = this;
South = overCell.South;
overCell.South.North = this;
Link(North);
Link(South);
}
else
{
East = overCell.East;
overCell.East.West = this;
West = overCell.West;
overCell.West.East = this;
Link(East);
Link(West);
}
}
