public Form1()
{
InitializeComponent();
FitEntireScreen();
head = new SnakeHead();
}
private void NextStep()
{
ClearSnake();
_snake.Insert(0, SnakeHead + _direction);
if (_snakeGrowth > 0)
{
_snakeGrowth -= 1;
}
else
{
_snake.RemoveAt(_snake.Count - 1);
}
CheckSnakeHeadCoordinates();
if (SnakeHead.Equals(_rabbit))
{
_snakeGrowth += 1;
PlaceRabbit();
}
DrawSnake();
if (GameOver())
{
Environment.Exit(1);
}
}
// Schlange erzeugen (nur Kopf)
internal void AddSnake()
{
// den Schlangenkopf erzeugen und positionieren
SnakeHead mySnakeHead = new SnakeHead(new Point(playground.ActualWidth / 2, playground.ActualHeight / 2), Colors.Red);
// in die Liste setzen
snake.Add(mySnakeHead);
}
public SnakeGame()
{
Grid = new Grid(new Size(20, 20));
Drawer = new ConsoleDrawer(Grid);
var head = new SnakeHead();
Grid.Set(GetRandomPoint(), head);
Snake = new Snake(head);
}
public World(Game game, IRenderItemFactory factory, GameRules rules)
{
this.game = game;
this.factory = factory;
Head = new SnakeHead(game, factory);
CreateWorld(game, factory, rules, rules.WorldSize);
Random random = new Random();
Treat = new Treat(game, factory, new Vector2I(random.Next(1, rules.WorldSize.X - 1), random.Next(1, rules.WorldSize.Y - 1)));
}
/// <summary>
/// Adds snake components to the snake so it gets longer
/// </summary>
/// <param name="count">Amount of snake parts to add</param>
private void AddSnakePart(int count = 1)
{
if (_snake.Count == 0 && _snakeHead == null)
{
_snakeHead = new SnakeHead(Config.StartPosition);
count--;
}
for (int i = 0; i < count; i++)
{
_snake.Add(new SnakeComponent(
(_snake.Count > 0 ? _snake.Last() : _snakeHead).PositionInt));
}
}
public int GetWallDistance(Direction direction)
{
switch (direction)
{
case Direction.Left:
return(SnakeHead.GetPosition().X);
case Direction.Right:
return(_gameSize.Width - SnakeHead.GetPosition().X);
case Direction.Up:
return(SnakeHead.GetPosition().X);
case Direction.Down:
return(_gameSize.Height - SnakeHead.GetPosition().Y);
default:
throw new ArgumentOutOfRangeException(nameof(direction), direction, null);
}
}
public int GetFoodDistance(Direction direction)
{
int FixNegative(int value) => value < 0 ? Math.Abs(value) * 2 : value;
switch (direction)
{
case Direction.Left:
return(FixNegative(SnakeHead.GetPosition().X - CurrentFood.GetPosition().X));
case Direction.Right:
return(FixNegative(CurrentFood.GetPosition().X - SnakeHead.GetPosition().X));
case Direction.Up:
return(FixNegative(SnakeHead.GetPosition().Y - CurrentFood.GetPosition().Y));
case Direction.Down:
return(FixNegative(CurrentFood.GetPosition().Y - SnakeHead.GetPosition().Y));
default:
throw new ArgumentOutOfRangeException(nameof(direction), direction, null);
}
}
public Snake(SnakeHead head)
{
Head = head;
}
//Function: LoadContent
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(Game.GraphicsDevice);
//Get the actual sprites related to the snake and fruit
//Set appropriate game logic objects to appropriate snake body parts
//Note: The "tail" is never formally kept track of, it was just a convienent
//name for the second body part of the initial snake.
snakeAssets();
snakeHeadActive = snakeHeadDown;
snakeBody[0] = initialSnakeBody;
snakeBody[1] = initialSnakeTail;
chooseFruit();
base.LoadContent();
}
public override void Update(GameTime gameTime)
{
if (Keyboard.GetState().IsKeyDown(Keys.Left) && snakeHeadActive.entityType != 7 && snakeHeadActive.textureImage != Game.Content.Load<Texture2D>(@"images\snakehead-right"))
{
snakeHeadActive = snakeHeadLeft;
}
if (Keyboard.GetState().IsKeyDown(Keys.Right) && snakeHeadActive.entityType != 6 && snakeHeadActive.textureImage != Game.Content.Load<Texture2D>(@"images\snakehead-left"))
{
snakeHeadActive = snakeHeadRight;
}
if (Keyboard.GetState().IsKeyDown(Keys.Up) && snakeHeadActive.entityType != 5 && snakeHeadActive.textureImage != Game.Content.Load<Texture2D>(@"images\snakehead-down"))
{
snakeHeadActive = snakeHeadUp;
}
if (Keyboard.GetState().IsKeyDown(Keys.Down) && snakeHeadActive.entityType != 4 && snakeHeadActive.textureImage != Game.Content.Load<Texture2D>(@"images\snakehead-up"))
{
snakeHeadActive = snakeHeadDown;
}
snakeHeadActive.Update(gameTime, Game.Window.ClientBounds);
// Update Snake Body
for (int i = 0; i < snakeLength - 1; i++)
{
snakeBody[i].Update(gameTime, Game.Window.ClientBounds);
snakeBody[i].position = new Vector2(Game1.spriteManager.snakeArray[i + 1].X * 16.0f, Game1.spriteManager.snakeArray[i + 1].Y * 16.0f);
}
// Copy the present location of the snake into a temporary location for reading
for (int i = 0; i < snakeLength; i++)
{
snakeCopyCurrentArray[i] = snakeArray[i];
}
// Overwrite the current snake location with the new snake location
for (int i = 0; i < snakeLength-1; i++)
{
snakeArray[i + 1] = snakeCopyCurrentArray[i];
}
//------
//The commented code below is a step-by-step example of how this process
//updates the snake, using only the initial snake pieces.
//snakeCopyCurrentArray[0] = snakeArray[0];
//snakeCopyCurrentArray[1] = snakeArray[1];
//snakeCopyCurrentArray[2] = snakeArray[2];
//snakeArray[1] = snakeCopyCurrentArray[0];
//snakeArray[2] = snakeCopyCurrentArray[1];
//------
// Update Fruit
currentFruit.Update(gameTime, Game.Window.ClientBounds);
// Check for fruit collision
// Update Score, Update Fruit Location
if (new Vector2((snakeHeadActive.position.X) / 16,(snakeHeadActive.position.Y) / 16) == (new Vector2((int)(currentFruit.position.X) / 16, (int)(currentFruit.position.Y) / 16)))
{
Game1.audioEating.Play();
System.Console.WriteLine("Fruit collected!");
//Update Score
switch (currentFruit.entityType)
{
case(0):
score += 100;
break;
case(1):
score += 250;
break;
case(2):
score += 500;
break;
}
// Add Snake Bit
snakeLength++;
snakeArray[snakeLength - 1] = snakeArray[snakeLength - 2];
snakeBody[snakeLength - 2] = new SnakeBody(Game.Content.Load<Texture2D>(@"images\snakebody"),
new Vector2(snakeArray[snakeLength - 1].X * 16, snakeArray[snakeLength - 1].Y * 16), new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 8);
// Replace fruit location with snake's head
if(snakeHeadActive.textureImage == Game.Content.Load<Texture2D>(@"images\snakehead-right")){
snakeHeadActive = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-right"),
new Vector2(snakeHeadPosition.X, snakeHeadPosition.Y),
new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 7);
}
if(snakeHeadActive.textureImage == Game.Content.Load<Texture2D>(@"images\snakehead-left")){
snakeHeadActive = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-left"),
new Vector2(snakeHeadPosition.X, snakeHeadPosition.Y),
new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 6);
}
if(snakeHeadActive.textureImage == Game.Content.Load<Texture2D>(@"images\snakehead-up")){
snakeHeadActive = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-up"),
new Vector2(snakeHeadPosition.X, snakeHeadPosition.Y),
new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 4);
}
if(snakeHeadActive.textureImage == Game.Content.Load<Texture2D>(@"images\snakehead-down")){
snakeHeadActive = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-down"),
new Vector2(snakeHeadPosition.X, snakeHeadPosition.Y),
new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 5);
}
// Replace fruit location with snake's current head
snakeArray[0] = (new Vector2((int)(currentFruit.position.X) / 16, (int)(currentFruit.position.Y) / 16));
// Regenerate Fruit
chooseFruit();
}
base.Update(gameTime);
}
// Load snake head assets
public void snakeAssets()
{
snakeHeadUp = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-up"),
snakeHeadPosition, new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 4);
snakeHeadDown = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-down"),
snakeHeadPosition, new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 5);
snakeHeadLeft = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-left"),
snakeHeadPosition, new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 6);
snakeHeadRight = new SnakeHead(Game.Content.Load<Texture2D>(@"images\snakehead-right"),
snakeHeadPosition, new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 7);
initialSnakeBody = new SnakeBody(Game.Content.Load<Texture2D>(@"images\snakebody"),
new Vector2(0,16), new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 8);
initialSnakeTail = new SnakeBody(Game.Content.Load<Texture2D>(@"images\snakebody"),
new Vector2(0,0), new Point(16, 16), new Vector2(4f, 4f), new Vector2(1, 1), Color.CornflowerBlue, new Vector2(0, 0), 8);
}