/// <summary>
/// Call this to start the game.
/// </summary>
private void StartGame()
{
// Start a new game.
Snake = new List <snakeSegment>();
gameMatrix.Children.Clear();
currentGameState = GameState.InGame;
ScoreTxT.Text = "Score: 0";
gameScore = 0;
// Create the snakes body.
Random r = new Random();
for (/*Declaration*/ int startX = r.Next(10, 35), startY = r.Next(10, 35), startDir = r.Next(0, 4), y = startY, x = startX, i = 0; /*Query*/ i < 8; /*Increment*/ y = (startDir == 0) ? y + 1 : (startDir == 1) ? y - 1 : startY, x = (startDir == 2) ? x + 1 : (startDir == 3) ? x - 1 : startX, i++)
{
Snake.Add(new snakeSegment(x, y, (MovementDirection)startDir));
}
// Draw snake.
foreach (snakeSegment seg in Snake)
{
gameMatrix.Children.Add(seg.Pixle);
}
// Create the apple.
Apple = new gameApple(Snake);
// Draw apple.
gameMatrix.Children.Add(Apple.Pixle);
// Start game.
if (!gameTick.IsBusy)
{
gameTick.RunWorkerAsync();
}
}
/// <summary>
/// This will draw the new snake position.
/// </summary>
private void GameTick_MoveSnake(object sender, ProgressChangedEventArgs e)
{
// Note: X & Y Go on a grid from 0 to 44
// Move snake forward one place in the correct Direction. If that direction is a wall; Die.
if (Snake[0].Direction == MovementDirection.Up && Snake[0].Y > minGrid)
{
Snake.RemoveAt(Snake.Count - 1);
Snake.Insert(0, new snakeSegment(Snake[0].X, Snake[0].Y - 1, Snake[0].Direction));
}
else if (Snake[0].Direction == MovementDirection.Up && Snake[0].Y == minGrid)
{
currentGameState = GameState.GameOver;
}
else if (Snake[0].Direction == MovementDirection.Down && Snake[0].Y < maxGrid)
{
Snake.RemoveAt(Snake.Count - 1);
Snake.Insert(0, new snakeSegment(Snake[0].X, Snake[0].Y + 1, Snake[0].Direction));
}
else if (Snake[0].Direction == MovementDirection.Down && Snake[0].Y == maxGrid)
{
currentGameState = GameState.GameOver;
}
else if (Snake[0].Direction == MovementDirection.Left && Snake[0].X > minGrid)
{
Snake.RemoveAt(Snake.Count - 1);
Snake.Insert(0, new snakeSegment(Snake[0].X - 1, Snake[0].Y, Snake[0].Direction));
}
else if (Snake[0].Direction == MovementDirection.Left && Snake[0].X == minGrid)
{
currentGameState = GameState.GameOver;
}
else if (Snake[0].Direction == MovementDirection.Right && Snake[0].X < maxGrid)
{
Snake.RemoveAt(Snake.Count - 1);
Snake.Insert(0, new snakeSegment(Snake[0].X + 1, Snake[0].Y, Snake[0].Direction));
}
else if (Snake[0].Direction == MovementDirection.Right && Snake[0].X == maxGrid)
{
currentGameState = GameState.GameOver;
}
// For every segement except for the head.
for (int i = 1; i < Snake.Count; i++)
{
// Handles the snake body intersecting its self.
if (Snake[i].X == Snake[0].X && Snake[i].Y == Snake[0].Y)
{
currentGameState = GameState.GameOver;
break;
}
// Make sure the snake keeps its direction.
else
{
Snake[i].Direction = Snake[i - 1].Direction;
}
}
// Eat the apple.
if (Snake[0].X == Apple.X && Snake[0].Y == Apple.Y)
{
if (Snake[Snake.Count - 1].Direction == MovementDirection.Up)
{
Snake.Add(new snakeSegment(Snake[Snake.Count - 1].X, Snake[Snake.Count - 1].Y + 1, Snake[Snake.Count - 1].Direction));
}
else if (Snake[Snake.Count - 1].Direction == MovementDirection.Down)
{
Snake.Add(new snakeSegment(Snake[Snake.Count - 1].X, Snake[Snake.Count - 1].Y - 1, Snake[Snake.Count - 1].Direction));
}
else if (Snake[Snake.Count - 1].Direction == MovementDirection.Left)
{
Snake.Add(new snakeSegment(Snake[Snake.Count - 1].X + 1, Snake[Snake.Count - 1].Y, Snake[Snake.Count - 1].Direction));
}
else if (Snake[Snake.Count - 1].Direction == MovementDirection.Right)
{
Snake.Add(new snakeSegment(Snake[Snake.Count - 1].X - 1, Snake[Snake.Count - 1].Y, Snake[Snake.Count - 1].Direction));
}
Apple = new gameApple(Snake);
gameScore++;
ScoreTxT.Text = "Score: " + gameScore;
}
if (currentGameState == GameState.InGame)
{
// Clear the matrix.
gameMatrix.Children.Clear();
// Draw the snake.
foreach (snakeSegment seg in Snake)
{
gameMatrix.Children.Add(seg.Pixle);
}
// Draw the apple.
gameMatrix.Children.Add(Apple.Pixle);
}
}
