/// <summary> /// Event which is used to determine the direction to move the <see cref="Snake"/>. /// </summary> /// <param name="sender">An <see cref="object"/> representing the source of the event.</param> /// <param name="e">An <see cref="EventArgs"/> containing the event data.</param> private void SnakeGame_KeyDown(object sender, KeyEventArgs e) { if (this.canRestart && e.KeyData == Keys.Space) { this.canRestart = false; this.NewGame(); } else { this.direction = SnakeUtility.ChangeDirection(this.direction, this.previousDirection, e.KeyData); } }
/// <summary> /// Creates/Recreates the game and then starts it. /// </summary> private void NewGame() { this.Controls.Clear(); this.gridSize = new Size(this.ClientSize.Width / BaseBlock.StandardBlockSize.Width, this.ClientSize.Height / BaseBlock.StandardBlockSize.Height); this.snake = new Snake(SnakeGame.DefaultSnakeLength); this.emptyPositions = SnakeUtility.GetEmptyBlockPositions(this.snake, this.gridSize); this.food = new FoodBlock(this.emptyPositions); this.direction = new Point(0, 1); this.state = GameState.Playing; this.Invalidate(); this.gameTimer.Enabled = true; }
/// <summary> /// Performs the main loop of game which is ran on every tick of the game timer. /// </summary> private void GameLoop() { if (this.direction.X == 0 && this.direction.Y == 0) { return; } if (SnakeUtility.WillEatFood(this.snake, this.food, this.direction)) { this.snake.Grow(); this.emptyPositions = SnakeUtility.GetEmptyBlockPositions(this.snake, this.gridSize); this.food = new FoodBlock(this.emptyPositions); } this.snake.Move(this.direction); this.previousDirection = this.direction; if (SnakeUtility.HasCollidedWithSelf(this.snake) || SnakeUtility.HasHitBounds(this.snake, this.gridSize.Width, this.gridSize.Height) || this.emptyPositions.Count == 0) { this.GameOver(); } }