public void GenRNGHitCandids()
{
CoordSet cs = new CoordSet();
switch (ShipsRemaining.Min())
{
case 2:
for (int i = 0; i < 100; i += 2)
{
cs.Add(new CoordPair(i));
}
break;
case 3:
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 10; j++)
{
cs.Add(new CoordPair(9 - i, j));
}
}
break;
case 4:
for (int i = 0; i < 4; i++)
{
cs.Add(new CoordPair(i, i + 6));
cs.Add(new CoordPair(i + 6, i));
}
for (int i = 0; i < 8; i++)
{
cs.Add(new CoordPair(i, i + 2));
cs.Add(new CoordPair(i + 2, i));
}
break;
case 5:
for (int i = 0; i < 10; i++)
{
cs.Add(new CoordPair(i, i));
}
for (int i = 0; i < 5; i++)
{
cs.Add(new CoordPair(i, i + 5));
cs.Add(new CoordPair(i + 5, i));
}
break;
}
cs.ExceptWith(AllMoves);
RandomHitCandidates = cs;
}
public CoordSet GetOccupiedArea(int range)
{
CoordSet cs = new CoordSet();
int firstX = Location.X - range;
int firstY = Location.Y - range;
int lastX = Location.X + range + (Horizontal ? Length - 1 : 0);
int lastY = Location.Y + range + (Horizontal ? 0 : Length - 1);
for (int x = firstX; x <= lastX; x++)
{
for (int y = firstY; y <= lastY; y++)
{
if (CoordPair.IsValidCoord(x, y))
{
cs.Add(new CoordPair(x, y));
}
}
}
return(cs);
}
public void RandomFill(int seed, Difficulty diff)
{
if (Populated)
{
tiles = new PrimaryTile[10, 10];
}
Random r = new Random(seed);
CoordSet filled;
int i = 0;
switch (diff)
{
case Difficulty.Easy:
while (i < 5)
{
Ship s = Ship.CreateRandom(r, ClassicShipLengths[i]);
if (TryAddShip(s))
{
i++;
}
}
break;
case Difficulty.Medium:
filled = new CoordSet();
while (i < 5)
{
Ship s = Ship.CreateRandom(r, ClassicShipLengths[i]);
if (filled.Overlaps(s.GetOccupiedArea(0)))
{
continue;
}
filled.Add(s.GetOccupiedArea(1));
TryAddShip(s);
i++;
}
break;
case Difficulty.Hard:
filled = new CoordSet();
var border = new CoordSet();
for (int j = 0; j < 10; j++)
{
border.Add(new CoordPair(0, j));
border.Add(new CoordPair(j, 0));
border.Add(new CoordPair(9, j));
border.Add(new CoordPair(j, 9));
}
while (i < 5)
{
Ship s = Ship.CreateRandom(r, ClassicShipLengths[i]);
var shipArea = s.GetOccupiedArea(0);
if (shipArea.Overlaps(filled))
{
continue;
}
var weakArea = new CoordSet(border);
weakArea.IntersectWith(shipArea);
if (r.NextDouble() < weakArea.Count * 0.4)
{
continue;
}
border.Add(s.GetOccupiedArea(1));
filled.Add(shipArea);
TryAddShip(s);
i++;
}
break;
}
Populated = true;
BoardChanged?.Invoke(this, new EventArgs());
}