private static bool IsValidPosition(int[,] fieldGrid, Position currentPosition)
{
int rows = fieldGrid.GetLength(0);
int cols = fieldGrid.GetLength(1);
bool isRowInRange = (currentPosition.Row <= rows && currentPosition.Row >= 0);
bool isColInRange = (currentPosition.Col >= 0 && currentPosition.Col <= cols);
bool isCellEmpty = fieldGrid[currentPosition.Row, currentPosition.Col] == 0;
return isCellEmpty && (isRowInRange && isColInRange);
}
public Playfield(int[,] customLabyrinth, Position customStartPosition)
: this(customLabyrinth)
{
if (customStartPosition.Row >= labyrinthGridRows ||
customStartPosition.Col >= labyrinthGridCols)
{
throw new IndexOutOfRangeException(
String.Format("The numbers of the custom position rows and cols must not be bigger than rows = {0} and cols = {1}! Your input: row = {0} and col = {1}",
Playfield.labyrinthGridRows, Playfield.labyrinthGridCols, customStartPosition.Row, customStartPosition.Col));
}
this.PlayerPosition = customStartPosition;
}
public static bool IsValidMove(Playfield playfield, Direction nextDirection)
{
int playerCurrentRow = playfield.PlayerPosition.Row;
int playerCurrentCol = playfield.PlayerPosition.Col;
Position playerCurrentPosition = new Position(playerCurrentRow, playerCurrentCol);
if (playerCurrentPosition.IsWinner())
{
return false;
}
playerCurrentPosition.MoveAtDirection(nextDirection);
int[,] fieldGrid = playfield.LabyrinthGrid;
return IsValidPosition(fieldGrid, playerCurrentPosition);
}
/// <summary>
/// Ensure clear escaping path from player start position
/// </summary>
private void EnsureClearPath()
{
Direction nextDirection = new Direction();
Position currentPosition = new Position();
while (!currentPosition.IsWinner())
{
int randomNumber = randomNumberGenerator.Next(-1, 4);
nextDirection = (Direction)(randomNumber);
if (!MovesChecker.IsValidMove(this, nextDirection))
{
currentPosition.MoveAtDirection(nextDirection);
this.LabyrinthGrid[currentPosition.Row, currentPosition.Col] = 0;
}
}
}