/// <summary>
/// For each tile it will attempt to visit NESW neighbor and change its Path to true
/// Can move to adjacent tile if it is not an environment tile, if it hasn't already been visited and if it not null
/// </summary>
/// <param name="envTile">Tile which the path starts from</param>
public void GetPath(IEnvTile envTile)
{
envTile.OnPath = true;
foreach (var direction in Enum.GetValues(typeof(Direction)).Cast <Direction>())
{
if (!envTile.AdjacentTile[direction].HasEnv & !envTile.AdjacentTile[direction].OnPath &
!(envTile.AdjacentTile[direction] is null))
{
GetPath(envTile.AdjacentTile[direction]);
}
}
}
/// <summary>
/// Produces matrix of tiles
/// </summary>
/// <param name="gridMapSize">max height/width from centre of outermost tile</param>
/// <param name="planeCentre">centre of the target plane</param>
/// <returns></returns>
private IEnvTile[,] CreateTilesMatrix(int gridMapSize, Vector3 planeCentre)
{
var tiles = new IEnvTile[gridMapSize + 1, gridMapSize + 1];
var x = -gridMapSize;
for (var i = 0; i < gridMapSize + 1; i++)
{
var z = -gridMapSize;
for (var j = 0; j < gridMapSize + 1; j++)
{
tiles[i, j] =
new EnvTile(
planeCentre + new Vector3(x, 0.5f, z),
(i, j)
);
z += 2;
}
x += 2;
}
return(tiles);
}
private IEnvTile GetDirectionTile(Direction d, IEnvTile inputEnvTile, IEnvTile[,] tileMatrix, int matrixSize)
{
if (d == Direction.N)
{
return(inputEnvTile.Coords.y == matrixSize
? null
: tileMatrix[inputEnvTile.Coords.x, inputEnvTile.Coords.y + 1]);
}
if (d == Direction.E)
{
return(inputEnvTile.Coords.x == matrixSize
? null
: tileMatrix[inputEnvTile.Coords.x + 1, inputEnvTile.Coords.y]);
}
if (d == Direction.S)
{
return(inputEnvTile.Coords.y == 0 ? null : tileMatrix[inputEnvTile.Coords.x, inputEnvTile.Coords.y - 1]);
}
if (d == Direction.W)
{
return(inputEnvTile.Coords.x == 0 ? null : tileMatrix[inputEnvTile.Coords.x - 1, inputEnvTile.Coords.y]);
}
throw new Exception("No direction given in TileMatrix.GetDirectionTile");
}
/// <summary>
/// Checks if a tile can be used as an environment tile to increase difficulty
/// </summary>
/// <param name="envTile">Tile to check</param>
/// <param name="matrixSize">Size of matrix</param>
/// <returns>true if appropriate tile</returns>
private static bool CanPlaceEnvDifficulty(IEnvTile envTile, int matrixSize)
{
return(!envTile.IsExit & !envTile.HasEnv & !envTile.HasGuard & !envTile.HasSpy &
!CanPlacePerimeter(envTile, matrixSize) & !CanPlaceMiddle(envTile, matrixSize));
}
/// <summary>
/// Returns true if tiles are adjacent to each other
/// </summary>
/// <param name="envTileOne"></param>
/// <param name="envTileTwo"></param>
/// <returns></returns>
private static bool TilesAreAdjacent(IEnvTile envTileOne, IEnvTile envTileTwo)
{
return(envTileOne == envTileTwo.AdjacentTile[Direction.W]);
}
/// <summary>
/// Checks if tile is in the guard spawn area (1 row if mapScale less than 3, else 3 rows)
/// </summary>
/// <param name="envTile">Tile to Check</param>
/// <param name="mapScale">Size of the map corresponding to scale of plane</param>
/// <param name="matrixSize">Size of tile matrix</param>
/// <returns>True if tile is in the guard spawn area </returns>
private static bool InGuardSpawnAreaY(IEnvTile envTile, int mapScale, int matrixSize)
{
return((mapScale >= 1) & (mapScale <= 3) & (envTile.Coords.y == matrixSize - 1) ||
(mapScale > 3) & (envTile.Coords.y <= matrixSize - 1) & (envTile.Coords.y >= matrixSize - 3));
}