public void SetNeighbors(GameCell[] newNeighbors)
{
// can only set neighbors once
// just because they must be bound late doesn't mean they're mutable!
if (neighbors == null)
neighbors = newNeighbors;
else
throw new InvalidOperationException(ERR_CANT_CHANGE_NEIGHBORS);
}
private GameCell[] CollectNeighbors(int x, int y)
{
// collect all neighboring Cell objects
// GetCell() performs coord normalization
var neighbors = new GameCell[8];
neighbors[0] = this[x - 1, y - 1]; // left-top
neighbors[1] = this[x - 1, y]; // left
neighbors[2] = this[x - 1, y + 1]; // left-bottom
neighbors[3] = this[x, y - 1]; // top
neighbors[4] = this[x, y + 1]; // bottom
neighbors[5] = this[x + 1, y - 1]; // right-top
neighbors[6] = this[x + 1, y]; // right
neighbors[7] = this[x + 1, y + 1]; // right-bottom
return neighbors;
}
private void InitializeCells()
{
// here's the meat
// messy, but only done once
int w, h;
// populate each grid point with a cell object
for (w = 0; w < FIELD_WIDTH; ++w)
for (h = 0; h < FIELD_HEIGHT; ++h)
field[w, h] = new GameCell();
// populate the neighbors array for each cell
for (w = 0; w < FIELD_WIDTH; ++w)
for (h = 0; h < FIELD_HEIGHT; ++h)
field[w, h].SetNeighbors(CollectNeighbors(w,h));
}