public EnemyShip(IGridSquare seedSquare, EnemyBoard enemyBoard)
{
maxSize = enemyBoard.GetActiveShipMaxSize();
sizeDetected = 1;
seed = Utils.ConvertGridSquareToPoint(seedSquare);
bool addDown = true;
bool addRight = true;
bool addUp = true;
bool addLeft = true;
possibleTilesAroundSeed = new List <Point>();
for (int dist = 1; dist <= 4; dist++)
{
Point down = seed.Plus(new Point(0, dist));
if (IsPointOnGrid(down) && enemyBoard.IsTestedSquare(down))
{
addDown = false;
}
if (addDown && IsPointOnGrid(down))
{
possibleTilesAroundSeed.Add(down);
}
Point right = seed.Plus(new Point(dist, 0));
if (IsPointOnGrid(right) && enemyBoard.IsTestedSquare(right))
{
addRight = false;
}
if (addRight && IsPointOnGrid(right))
{
possibleTilesAroundSeed.Add(right);
}
Point up = seed.Plus(new Point(0, -dist));
if (IsPointOnGrid(up) && enemyBoard.IsTestedSquare(up))
{
addUp = false;
}
if (addUp && IsPointOnGrid(up))
{
possibleTilesAroundSeed.Add(up);
}
Point left = seed.Plus(new Point(-dist, 0));
if (IsPointOnGrid(left) && enemyBoard.IsTestedSquare(left))
{
addLeft = false;
}
if (addLeft && IsPointOnGrid(left))
{
possibleTilesAroundSeed.Add(left);
}
}
}
/*
* We can cover the whole board by only aiming at half of the squares
* (In a chess-board pattern)
* Pick even columns in rows A, C, E...
* Pick odd columns in rows B, D, F...
*/
private IGridSquare PickRandomTarget()
{
int row = rng.Next(10);
int column = rng.Next(5) * 2;
if (row % 2 == 0)
{
column++;
}
int firstX = column;
int firstY = row;
int firstColumnInRow = column;
while (enemyBoard.IsTestedSquare(new Point(column, row)))
{
column = (column + 2) % 10;
if (column == firstColumnInRow)
{
row = (row + 1) % 10;
column = (column + 1) % 10;
firstColumnInRow = column;
}
//Complete loop, therefore shift to other coloured tiles
//This will eventually be redundant, as matches will end before all options explored
//But in the half-finished state, we need to avoid infinite loops
if (column == firstX && row == firstY)
{
column = (column + 1) % 10;
}
}
IGridSquare gridSquare = new GridSquare(GameBoard.GridRefs.ToCharArray()[row], column + 1);
return(gridSquare);
}