/// <summary>
/// Checks to see if a given Ship instance can be placed on a given Playgrid without being out of bounds
/// </summary>
/// <param name="s">The ship instance to place</param>
/// <param name="pg">Playgrid instance</param>
/// <param name="x">The x coordinate to place the ship on</param>
/// <param name="y">The y coordinate to place the ship on</param>
/// <returns>A boolean if the placement spot is valid or not</returns>
public bool IsValidPlacement(Ship s, Playgrid pg, int x, int y)
{
if ((x > pg.Width - s.Length && !s.IsVertical) || (y > pg.Height - s.Length && s.IsVertical) || x < 0 || y < 0) //out of bounds check
{
return(false);
}
else
{
return(true);
}
}
/// <summary>
/// Checks to see if a ship is present at the given tile
/// </summary>
/// <param name="pg">The Playgrid instance to check on</param>
/// <param name="x">The x coordinate to check</param>
/// <param name="y">The y coordinate to check</param>
/// <returns></returns>
public bool IsShipHere(Playgrid pg, int x, int y)
{
if (pg.ValueAt(x, y) == TileState.ShipHere || pg.ValueAt(x, y) == TileState.PreviewCollision)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Checks to see if any placement collisions exist when previewing
/// </summary>
/// <param name="pg">The Playgrid instance to check</param>
/// <returns>True if any collisions are found, false if non are present</returns>
public bool IsCollisionPresent(Playgrid pg)
{
for (int i = 0; i < pg.Width; i++)
{
for (int j = 0; j < pg.Height; j++)
{
if (pg.ValueAt(i, j) == TileState.PreviewCollision)
{
return(true);
}
}
}
return(false);
}
/// <summary>
/// Fires at a given x,y coordinate
/// </summary>
/// <param name="x">The x coordinate of where to 'shoot'</param>
/// <param name="y">The y coordinate of where to 'shoot'</param>
/// <param name="target">The target to base off of</param>
/// <returns>True if the shot was a hit, false if it missed</returns>
public bool Shoot(int x, int y, Playgrid target)
{
bool hit = false;
if (target.ValueAt(x, y) == TileState.ShipHere && target.ValueAt(x, y) != TileState.Hit)
{
target.ChangeTile(x, y, TileState.Hit);
hit = true;
}
else if (target.ValueAt(x, y) != TileState.Hit)
{
target.ChangeTile(x, y, TileState.Missed);
}
return(hit);
}
/// <summary>
/// Checks to see if a given ship is intersecting
/// </summary>
/// <param name="s">The ship to check if its intersecting anything</param>
/// <param name="pg">The playgrid to check</param>
/// <param name="x">The x coordinate of the ships top/left most point</param>
/// <param name="y">The y coordinate of the ships top/left most point</param>
/// <returns>True if the ship is intersecting another and false if it is not</returns>
public bool IsShipIntersecting(Ship s, Playgrid pg, int x, int y)
{
for (int i = 0; i < s.Length; i++)
{
if (s.IsVertical && IsShipHere(pg, x, y + i))
{
return(true);
}
else if (!s.IsVertical && IsShipHere(pg, x + i, y))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Reverts the changed tiles states that previewing made
/// </summary>
/// <param name="pg">The affected Playgrid instance to revert on</param>
public void RevertPreviewChanges(Playgrid pg)
{
for (int i = 0; i < pg.Width; i++)
{
for (int j = 0; j < pg.Height; j++)
{
if (pg.ValueAt(i, j) == TileState.PreviewOK)
{
pg.ChangeTile(i, j, TileState.Normal);
}
else if (pg.ValueAt(i, j) == TileState.PreviewCollision)
{
pg.ChangeTile(i, j, TileState.ShipHere);
}
}
}
}
/// <summary>
/// Places a ship on the respective grid at the respective x,y location.
/// Ships are placed by setting their leftmost or top most point, then add on their length
/// </summary>
/// <param name="s">The Ship instance to place</param>
/// <param name="pg">The Playgrid instance to place on</param>
/// <param name="x">The x coordinate to place on</param>
/// <param name="y">The y coordinate to place on</param>
public void PlaceShip(Ship s, Playgrid pg, int x, int y)
{
if (IsValidPlacement(s, pg, x, y) && !IsShipHere(pg, x, y) && !IsCollisionPresent(pg))
{
s.Tiles = new Tile[s.Length];
if (!s.IsVertical)
{
for (int i = 0; i < s.Length; i++)
{
pg.ChangeTile(x + i, y, TileState.ShipHere);
s.Tiles[i] = pg.Grid[x + i, y];
}
}
else
{
for (int i = 0; i < s.Length; i++)
{
pg.ChangeTile(x, y + i, TileState.ShipHere);
s.Tiles[i] = pg.Grid[x, y + i];
}
}
}
}
public CheatingAI(Playgrid playergrid)
{
Playergrid = playergrid;
}
/// <summary>
/// Changes tile states to preview states when view visually
/// </summary>
/// <param name="s">The ship to place</param>
/// <param name="pg">The Playgrid instance to place</param>
/// <param name="x">The x coordinate to place on</param>
/// <param name="y">The y coordinate to place on</param>
public void PreviewShipPlace(Ship s, Playgrid pg, int x, int y)
{
if (s == null)
{
return;
}
bool inBounds = (x >= 0 && y >= 0) && (x < pg.Width && y < pg.Height); //isValid limits the bounds further because of ship length, need a bool for 'normal' out of bounds
if (inBounds)
{
if (s.IsVertical)
{
if (IsValidPlacement(s, pg, x, y))
{
for (int i = 0; i < s.Length; i++)
{
if (pg.ValueAt(x, y + i) == TileState.ShipHere)
{
pg.ChangeTile(x, y + i, TileState.PreviewCollision);
}
else
{
pg.ChangeTile(x, y + i, TileState.PreviewOK);
}
}
}
else
{
for (int i = 0; i < s.Length; i++)
{
if (pg.ValueAt(x, pg.Height - s.Length + i) == TileState.ShipHere)
{
pg.ChangeTile(x, pg.Height - s.Length + i, TileState.PreviewCollision);
}
else
{
pg.ChangeTile(x, pg.Height - s.Length + i, TileState.PreviewOK);
}
}
}
}
else
{
if (IsValidPlacement(s, pg, x, y))
{
for (int i = 0; i < s.Length; i++)
{
if (pg.ValueAt(x + i, y) == TileState.ShipHere)
{
pg.ChangeTile(x + i, y, TileState.PreviewCollision);
}
else
{
pg.ChangeTile(x + i, y, TileState.PreviewOK);
}
}
}
else
{
for (int i = 0; i < s.Length; i++)
{
if (pg.ValueAt(pg.Width - s.Length + i, y) == TileState.ShipHere)
{
pg.ChangeTile(pg.Width - s.Length + i, y, TileState.PreviewCollision);
}
else
{
pg.ChangeTile(pg.Width - s.Length + i, y, TileState.PreviewOK);
}
}
}
}
}
}
public MediumAI(Playgrid playerGrid)
{
PlayerGrid = playerGrid;
}
public HardAI(Playgrid playerGrid)
{
this.PlayerGrid = playerGrid;
}
public EasyAI(Playgrid playerGrid)
{
this.PlayerGrid = playerGrid;
}
