private static int getNeighborCount(bool[] seed, int cellNumber, int stageX, int stageY)
{
var directionals = new Directionals(cellNumber, stageX, stageY);
var culledCells = cullOutOfBounds(directionals);
var count = 0;
foreach (var cell in culledCells)
{
if (seed[cell])
{
count++;
}
}
return(count);
}
private static int[] cullOutOfBounds(Directionals directionals)
{
//left
if (directionals.CellNumber % directionals.StageX == 0)
{
//top
if (directionals.CellNumber == (directionals.StageY * directionals.StageX) - directionals.StageX)
{
return(new List <int> {
directionals.Down,
directionals.DownRight,
directionals.Right
}.ToArray());
//bottom
}
else if (directionals.CellNumber == 0)
{
return(new List <int> {
directionals.Up,
directionals.UpRight,
directionals.Right
}.ToArray());
//other left cells
}
else
{
return(new List <int> {
directionals.Up,
directionals.UpRight,
directionals.Down,
directionals.DownRight,
directionals.Right
}.ToArray());
}
//right
}
else if (directionals.CellNumber % directionals.StageX == directionals.StageX - 1)
{
//top
if (directionals.CellNumber == (directionals.StageY * directionals.StageX) - 1)
{
return(new List <int> {
directionals.Down,
directionals.DownLeft,
directionals.Left,
}.ToArray());
//bottom
}
else if (directionals.CellNumber < directionals.StageX)
{
return(new List <int> {
directionals.Up,
directionals.UpLeft,
directionals.Left,
}.ToArray());
//other right cells
}
else
{
return(new List <int> {
directionals.Up,
directionals.UpLeft,
directionals.Down,
directionals.DownLeft,
directionals.Left,
}.ToArray());
}
//top
}
else if (directionals.CellNumber >= (directionals.StageY * directionals.StageX) - directionals.StageX)
{
return(new List <int> {
directionals.Down,
directionals.DownLeft,
directionals.DownRight,
directionals.Left,
directionals.Right
}.ToArray());
//bottom
}
else if (directionals.CellNumber < directionals.StageX)
{
return(new List <int> {
directionals.Up,
directionals.UpLeft,
directionals.UpRight,
directionals.Left,
directionals.Right
}.ToArray());
//other right cells
}
else
{
return(new List <int> {
directionals.Up,
directionals.UpLeft,
directionals.UpRight,
directionals.Down,
directionals.DownLeft,
directionals.DownRight,
directionals.Left,
directionals.Right
}.ToArray());
}
}