protected override void LoadContent()
{
_spriteBatch = new SpriteBatch(GraphicsDevice);
// TODO: use this.Content to load your game content here
snakeTexture = Content.Load <Texture2D>("snake");
appleTexture = Content.Load <Texture2D>("apple");
snakeGrowX = Content.Load <Texture2D>("snakeGrowX");
snakeGrowY = Content.Load <Texture2D>("snakeGrowY");
Apple apple = new Apple(appleTexture, new Vector2(random.Next(0, _graphics.PreferredBackBufferHeight), random.Next(0, _graphics.PreferredBackBufferWidth)));
apples.Add(apple);
snake = new Snake(snakeTexture);
snake.position = new Vector2(_graphics.PreferredBackBufferWidth / 2, _graphics.PreferredBackBufferHeight / 2);
snakes.Enqueue(snake);
snakePositions.Add(snake.position);
spScore = Content.Load <SpriteFont>("score");
spCurrSpeed = Content.Load <SpriteFont>("currentSpeed");
spGameOver = Content.Load <SpriteFont>("gameOver");
}
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
if (!gameOver)
{
// TODO: Add your update logic here
VectorAndLastDirection vld = movement.Move(snakes.ElementAt(0).position, snakeSpeed, gameTime, true, snakes.ElementAt(0).lastDirection);
snakes.ElementAt(0).prevPosition = snakes.ElementAt(0).position;
snakes.ElementAt(0).position = vld.position;
snakePositions[0] = vld.position;
snakes.ElementAt(0).lastDirection = snakes.ElementAt(0).currDirection;
snakes.ElementAt(0).currDirection = vld.lastDirection;
for (int i = 1; i < snakePositions.Count; i++)
{
snakes.ElementAt(i).prevPosition = snakes.ElementAt(i).position;
switch (snakes.ElementAt(i - 1).lastDirection)
{
case "up":
snakes.ElementAt(i).position = new Vector2(snakes.ElementAt(i - 1).prevPosition.X, snakes.ElementAt(i - 1).prevPosition.Y); // + snakeTexture.Height);
break;
case "down":
snakes.ElementAt(i).position = new Vector2(snakes.ElementAt(i - 1).prevPosition.X, snakes.ElementAt(i - 1).prevPosition.Y); // - snakeTexture.Height);
break;
case "left":
snakes.ElementAt(i).position = new Vector2(snakes.ElementAt(i - 1).prevPosition.X, snakes.ElementAt(i - 1).prevPosition.Y);
break;
case "right":
snakes.ElementAt(i).position = new Vector2(snakes.ElementAt(i - 1).prevPosition.X, snakes.ElementAt(i - 1).prevPosition.Y);
break;
}
snakePositions[i] = snakes.ElementAt(i).position;
snakes.ElementAt(i).lastDirection = snakes.ElementAt(i - 1).lastDirection;
}
for (int i = 0; i < apples.Count(); i++)
{
//Make sure it doesn't leave the bounds
Vector2 keepAppleInBounds = utilities.KeepInBounds(apples[i].position, _graphics, apples[i].texture);
apples[i].position.X = keepAppleInBounds.X;
apples[i].position.Y = keepAppleInBounds.Y;
if (utilities.Collides(snakeTexture, apples[i].texture, snakes.ElementAt(0).position, apples[i].position))
{
Snake addSnake = new Snake(snakeTexture);
switch (snakes.ElementAt(0).currDirection)
{
case "up":
addSnake.position = new Vector2(snakes.ElementAt(snakes.Count() - 1).position.X, snakes.ElementAt(snakes.Count() - 1).position.Y); // + snakeTexture.Height);
break;
case "down":
addSnake.position = new Vector2(snakes.ElementAt(snakes.Count() - 1).position.X, snakes.ElementAt(snakes.Count() - 1).position.Y); // - snakeTexture.Height);
break;
case "left":
addSnake.position = new Vector2(snakes.ElementAt(snakes.Count() - 1).position.X, snakes.ElementAt(snakes.Count() - 1).position.Y);
break;
case "right":
addSnake.position = new Vector2(snakes.ElementAt(snakes.Count() - 1).position.X, snakes.ElementAt(snakes.Count() - 1).position.Y);
break;
}
snakePositions.Add(addSnake.position);
snakes.Enqueue(addSnake);
snakeSpeed += 8f;
score += 100;
apples.RemoveAt(i);
}
}
if (apples.Count() == 0)
{
Apple apple = new Apple(appleTexture, new Vector2(random.Next(0, _graphics.PreferredBackBufferHeight), random.Next(0, _graphics.PreferredBackBufferWidth)));
apples.Add(apple);
}
Vector2 keepSnakeInBounds = utilities.KeepInBounds(snakes.ElementAt(0).position, _graphics, snakeTexture);
snakes.ElementAt(0).position = keepSnakeInBounds;
if (utilities.CollideWithBounds(snakes.ElementAt(0).position, _graphics, snakeTexture))
{
gameOver = true;
}
}
base.Update(gameTime);
}
