/// <summary>
/// Start a new game of Snake
/// If this new game is the first, then the Snake is initially not moving
/// </summary>
/// <param name="startingGame">Is this the first game of snake that has been played</param>
private void NewGame(bool startingGame)
{
// If the new game is the first that has been started, initially the snake is not moving
if (startingGame)
{
snake.MovingDirection = Direction.NotMoving;
}
else
{
// Otherwise the Snake is moving right and the game has started
snake.MovingDirection = Direction.Right;
if (!gameStarted)
gameStarted = true;
}
// Reset the Snake to prepare for a new game
snake.Reset();
// Find a location for the food
food = GetRandomSector();
// Reset the values of all fields to start a new game
turnQueue.Clear();
score = 0;
gamePaused = false;
gameEnded = false;
}
/// <summary>
/// Initialise the grid of sectors representing the current game area
/// </summary>
/// <param name="gameGrid">The list of Sectors to populate</param>
private void InitGrid(ICollection<Sector> gameGrid)
{
int x = gamePanel.Width - SIZE;
int y = gamePanel.Height - SIZE;
for (int i = 0; i <= x; i += SIZE)
{
for (int j = 0; j <= y; j += SIZE)
{
var gridSector = new Sector(i, j, SIZE, SIZE);
gameGrid.Add(gridSector);
}
}
}
/// <summary>
/// Determines if two Sector objects can be considered equal.
/// Two Sectors are equal if both the x and y coordinates are the same
/// </summary>
/// <param name="a">The first Sector to test</param>
/// <param name="b">The second Sector to test</param>
/// <returns>True if both Sectors are equal, false otherwise</returns>
public static bool Equals(Sector a, Sector b)
{
return a.X == b.X && a.Y == b.Y;
}
/// <summary>
/// Method fired when the timer has ticked
/// Updates the Snake and checks if the food is hit or if the game is over
/// </summary>
/// <param name="sender">Sender of the event</param>
/// <param name="e">Information about the event</param>
private void GameTimerTick(object sender, EventArgs e)
{
// Only apply game logic when the game is not paused or ended
if (!gamePaused && !gameEnded)
{
// Apply the most recent queued Direction
if (turnQueue.Count >= 1)
{
// If the new direction is compatible, change the moving direction of the snake
if (IsCompatible(turnQueue[0]))
{
snake.MovingDirection = turnQueue[0];
}
// Remove the queued Direction from the list
turnQueue.RemoveAt(0);
}
// Move the Snake
snake.Move();
// If the Snake has hit the food
if (HasHitFood())
{
// Relocate the food, make the Snake grow by 5 segments and increase the score
food = GetRandomSector();
snake.Grow(5);
score += 10;
PlaySound(SoundToPlay.AteFood);
}
// If the game is over and the snake is moving then the game has ended
if (IsGameOver() && snake.MovingDirection != Direction.NotMoving)
{
gameEnded = true;
PlaySound(SoundToPlay.GameOver);
}
}
// Paint the current game state onto the PictureBox by firing the Paint event
gamePanel.Invalidate();
}
/// <summary>
/// Construct a new Sector object from an existing Sector
/// </summary>
/// <param name="sector">The existing Sector object</param>
public Sector(Sector sector)
{
rect = sector.rect;
}