/**
* @return the so-called Moore neighborhood: the 8 neighbors of a cell at North, South, East, West, NW, NE, SW, SE
*/
private IList <ICell> BuildMooreNeighbors(ICell cell)
{
IList <ICell> neighbors = new List <ICell>();
Grid2d <ICell> .Location cellPosition = grid2d.GetPosition(cell);
int X = cellPosition.GetX();
int Y = cellPosition.GetY();
ICell northNeighbor = grid2d.GetCell(X, GetNorthY(Y));
ICell southNeighbor = grid2d.GetCell(X, GetSouthY(Y));
ICell eastNeighbor = grid2d.GetCell(GetEastX(X), Y);
ICell westNeighbor = grid2d.GetCell(GetWestX(X), Y);
ICell northEastNeighbor = grid2d.GetCell(GetEastX(X), GetNorthY(Y));
ICell northWestNeighbor = grid2d.GetCell(GetWestX(X), GetNorthY(Y));
ICell southEastNeighbor = grid2d.GetCell(GetEastX(X), GetSouthY(Y));
ICell southWestNeighbor = grid2d.GetCell(GetWestX(X), GetSouthY(Y));
//add the neighbors to the list, if they exist(at the boundary cells have no all of the 4 neighbors)
if (northNeighbor != null)
{
neighbors.Add(northNeighbor);
}
if (southNeighbor != null)
{
neighbors.Add(southNeighbor);
}
if (eastNeighbor != null)
{
neighbors.Add(eastNeighbor);
}
if (westNeighbor != null)
{
neighbors.Add(westNeighbor);
}
if (northEastNeighbor != null)
{
neighbors.Add(northEastNeighbor);
}
if (northWestNeighbor != null)
{
neighbors.Add(northWestNeighbor);
}
if (southEastNeighbor != null)
{
neighbors.Add(southEastNeighbor);
}
if (southWestNeighbor != null)
{
neighbors.Add(southWestNeighbor);
}
//add the cell-itself to the neighborhood
if (includeCell)
{
neighbors.Add(cell);
}
return(neighbors);
}
