public static void DoMovement()
{
Vector2 nextPosition = snakePositions.First().Move(direction, snakePieceSize);
Texture background = DrawManager.GetTexture("Background");
//allow the snake to go through the borders of the screen
//this if statement checks if it is still within the screen border. if not, it needs to put the snake on the other side
if (!new System.Drawing.Rectangle(
background.getTexturePosition(DrawManager.ImagePosition.TopLeft)
.ToPoint(), new Size(background.Image.Width - snakePieceSize, background.Image.Height - snakePieceSize))
.IsInside(nextPosition + background.Position))
{
if (direction == Direction.West)
{
nextPosition.X = (background.getTexturePosition(DrawManager.ImagePosition.TopLeft) - background.Position).X + background.Image.Width - snakePieceSize;
}
if (direction == Direction.South)
{
nextPosition.Y = 0;
}
if (direction == Direction.East)
{
nextPosition.X = (background.getTexturePosition(DrawManager.ImagePosition.TopLeft) - background.Position).X;
}
if (direction == Direction.North)
{
nextPosition.Y = background.Image.Height - snakePieceSize;
}
}
//try to move the snake or destroy it
if (!WillBeDestroyed(nextPosition))
{
if (eggPosition.Distance(nextPosition) < 25)
{
snakePositions.Add(snakePositions[snakePositions.Count() - 1]);
eggPosition = GetNewEggPosition();
DrawManager.activeTextures.RemoveAll(new Predicate <Texture>(a => a.DisplayName == "Egg"));
DrawManager.CreateTexture("SnakePiece", "Egg", background.Position + eggPosition, DrawManager.ImagePosition.TopLeft);
}
//ends at 1 so it skips the first snake piece to override later
for (int i = snakePositions.Count() - 1; i > 0; i--)
{
snakePositions[i] = snakePositions[i - 1];
}
snakePositions[0] = nextPosition;
//remove all active snakes
DrawManager.activeTextures.RemoveAll(new Predicate <Texture>(a => a.DisplayName == "Snake Piece"));
//draw the new ones
foreach (Vector2 pos in snakePositions)
{
DrawManager.CreateTexture("SnakePiece", "Snake Piece",
background.Position + pos, DrawManager.ImagePosition.TopLeft);
}
}
else
{
Chat.Print("You lose! Your snake was " + snakePositions.Count() + " in length with a speed setting of " + MenuHandler.GetSliderValue(MenuHandler.SnakeMenu, "Game Speed"));
DrawManager.MenuState = DrawManager.HUDState.MainMenu;
}
}