private void FireOpponentMissileEasy()
{
// fire opponent missile
bool done = false;
while (done == false)
{
int rowNumber = rand.Next(Battlefield.FIELD_SIZE);
int columnNumber = rand.Next(Battlefield.FIELD_SIZE);
FireMissileStatus status = UserBoard.FireMissile(columnNumber, rowNumber);
if (status == FireMissileStatus.Hit || status == FireMissileStatus.Miss)
{
done = true;
}
}
}
private void FireOpponentMissileDifficult()
{
// fire opponent missile
bool done = false;
while (done == false)
{
// start firing randomly until we hit a ship
if (huntMode == false)
{
int rowNumber = rand.Next(Battlefield.FIELD_SIZE);
int columnNumber = rand.Next(Battlefield.FIELD_SIZE);
FireMissileStatus status = UserBoard.FireMissile(columnNumber, rowNumber);
if (status == FireMissileStatus.Hit || status == FireMissileStatus.Miss)
{
done = true;
}
// If this is the first hit, then remember the coordinates and start the algorithm
if (status == FireMissileStatus.Hit)
{
startingColumn = columnNumber;
startingRow = rowNumber;
curColumn = columnNumber;
curRow = rowNumber;
huntMode = true;
sunkenShips = UserBoard.GetSunkenShipCount();
dirSelected = false;
numDirectionChanges = 0;
}
}
else
{
// Do some intelligent firing since we are already in hunt mode
if (dirSelected == false)
{
huntDir = DirectionHelper.GetRandDirection();
dirSelected = true;
numDirectionChanges++;
}
int tempRow = 0;
int tempColumn = 0;
DirectionHelper.GetNextFiringCoordinate(huntDir, curRow, curColumn, out tempRow, out tempColumn);
FireMissileStatus status = UserBoard.FireMissile(tempColumn, tempRow);
if (status == FireMissileStatus.Hit || status == FireMissileStatus.Miss)
{
done = true;
int curSunkenShips = UserBoard.GetSunkenShipCount();
if (sunkenShips != curSunkenShips)
{
// we sunk a battle ship, so we are done with this algorithm
// start over again with another random firing
huntMode = false;
}
else
{
if (status == FireMissileStatus.Hit)
{
curRow = tempRow;
curColumn = tempColumn;
}
else if (status == FireMissileStatus.Miss)
{
// we exhausted all the hits in one direction, now pick a different direction
if (numDirectionChanges == 1 || numDirectionChanges == 3)
{
// we are moving in one direction, we still need to go to opposite dir
huntDir = DirectionHelper.GetOppositeDirection(huntDir);
}
else
{
// we exhausted opposite directions, so go perpendicular
huntDir = DirectionHelper.GetRandPerpendicularDirection(huntDir);
}
numDirectionChanges++;
curRow = startingRow;
curColumn = startingColumn;
}
}
}
else if (status == FireMissileStatus.AlreadyFired || status == FireMissileStatus.Illegal)
{
// we exhausted all the hits in one direction, now pick a different direction
if (numDirectionChanges == 1 || numDirectionChanges == 3)
{
// we are moving in one direction, we still need to go to opposite dir
huntDir = DirectionHelper.GetOppositeDirection(huntDir);
}
else
{
// we exhausted opposite directions, so go perpendicular
huntDir = DirectionHelper.GetRandPerpendicularDirection(huntDir);
}
numDirectionChanges++;
curRow = startingRow;
curColumn = startingColumn;
// some ship placements might make this algorithm get stuck in an infinite loop
// let us break it manually and start over again
if (numDirectionChanges > 6)
{
Console.WriteLine("Coming out of a bind ... :-)");
huntMode = false;
}
}
}
}
}