static int DegreesOfFreedom(SnakeBoard board, string direction)
{
int x = board.GetPlayerPosition().x;
int y = board.GetPlayerPosition().y;
int newX, newY;
switch (direction)
{
case "right":
newX = x + 1;
if (board.CellBlocked(newX, y))
{
return(0);
}
return(1 + CellFree(board, newX + 1, y) + CellFree(board, newX, y + 1) + CellFree(board, newX, y - 1));
case "left":
newX = x - 1;
if (board.CellBlocked(newX, y))
{
return(0);
}
return(1 + CellFree(board, newX - 1, y) + CellFree(board, newX, y + 1) + CellFree(board, newX, y - 1));
case "down":
newY = y + 1;
if (board.CellBlocked(x, newY))
{
return(0);
}
return(1 + CellFree(board, x, newY + 1) + CellFree(board, x + 1, newY) + CellFree(board, x - 1, newY));
default: // up
newY = y - 1;
if (board.CellBlocked(x, newY))
{
return(0);
}
return(1 + CellFree(board, x, newY - 1) + CellFree(board, x + 1, newY) + CellFree(board, x - 1, newY));
}
}
private static int CellFree(SnakeBoard board, int x, int y)
{
return(Convert.ToInt32(!board.CellBlocked(x, y)));
}