public int GetLivingNeighbors(int xPoint, int yPoint)
{
var livingNeighbors = 0;
for (var x = -1; x <= 1; x++)
{
for (var y = -1; y <= 1; y++)
{
if (x == 0 && y == 0)
{
/*do nothing, as is self*/
}
else if (x + xPoint < 0 || y + yPoint < 0 || x + xPoint >= Grid.GetLength(0) || y + yPoint >= Grid.GetLength(1))
{
/*do nothing, as out of bounds of Grid*/
}
else if (Grid[xPoint + x, yPoint + y].IsAlive)
{
livingNeighbors++;
}
}
}
return(livingNeighbors);
}
/// <summary>
/// Advances to the next generation
/// </summary>
public void TickNextGen()
{
int neightbours;
// first pass to mark changes
for (int row = 0; row < Grid.GetLength(0); row++)
{
for (int col = 0; col < Grid.GetLength(1); col++)
{
neightbours = CountLiveNeighbours(row, col);
if (Grid[row, col] == (int)CellStatus.dead && neightbours == 3)
{
Grid[row, col] = (int)CellStatus.born;
}
else if (Grid[row, col] == (int)CellStatus.alive && neightbours != 2 && neightbours != 3)
{
Grid[row, col] = (int)CellStatus.dying;
}
}
}
// second pass to make changes
for (int row = 0; row < Grid.GetLength(0); row++)
{
for (int col = 0; col < Grid.GetLength(1); col++)
{
if (Grid[row, col] == (int)CellStatus.dying)
{
Grid[row, col] = (int)CellStatus.dead;
}
else if (Grid[row, col] == (int)CellStatus.born)
{
Grid[row, col] = (int)CellStatus.alive;
}
}
}
}
