public MineField(Vector2 position, Point tileSize, int width, int height, bool wrapAround, float mineRatio)
{
Position = position;
TileSize = tileSize;
Width = width;
Height = height;
WrapAround = wrapAround;
MasksPerRow = width / BitMaskGrid.Size + 1;
var maskAmountY = height / BitMaskGrid.Size + 1;
var maskAmountTotal = MasksPerRow * maskAmountY;
MineMasks = SeedMineField(width, height, tileSize, mineRatio, maskAmountTotal);
RevealMasks = new BitMaskGrid[maskAmountTotal];
}
private static BitMaskGrid[] SeedMineField(int width, int height, Point tileSize, float mineRatio,
int totalMasks)
{
mineRatio = MathHelper.Clamp(mineRatio, 0, 1);
var invertSeeding = mineRatio > 0.5f;
var mineMasks = new BitMaskGrid[totalMasks];
if (invertSeeding)
{
for (var i = 0; i < mineMasks.Length; i++)
{
mineMasks[i].ResetToOne();
}
}
var seedAmount = (int)(width * height * (invertSeeding ? 1 - mineRatio : mineRatio));
var seedValue = (uint)(invertSeeding ? 0 : 1);
var mineLayer = new Random();
while (seedAmount > 0)
{
var x = mineLayer.Next(width);
var y = mineLayer.Next(height);
var maskIndex = y / BitMaskGrid.Size * (width / BitMaskGrid.Size + 1) + x / BitMaskGrid.Size;
if (!(((mineMasks[maskIndex][y % BitMaskGrid.Size] &
(BitMaskGrid.MostSignificantBitOnly >> (x % BitMaskGrid.Size))) == 0) ^
invertSeeding))
{
continue;
}
mineMasks[maskIndex][y % BitMaskGrid.Size] ^= BitMaskGrid.MostSignificantBitOnly >> x;
//Console.WriteLine(mask[y % BitMaskGrid.Size]);
seedAmount--;
}
return(mineMasks);
}