public override void Update(GameTime gameTime)
{
base.Update(gameTime);
if (_scoreText.Alpha < 1)
{
_scoreText.Alpha += 0.1f;
}
if (!_snakeHead.Alive)
{
if (FlxG.Keyboard.AnyJustReleased(new Keys[] { Keys.Space, Keys.R }))
{
FlxG.ResetState();
}
return;
}
FlxG.Overlap(_snakeHead, _fruit, CollectFruit);
FlxG.Overlap(_snakeHead, _snakeBody, GameOver);
if (FlxG.Keyboard.AnyPressed(new Keys[] { Keys.Up, Keys.W }) && _currentDirection != FlxObjectDirection.DOWN)
{
_nextDirection = FlxObjectDirection.UP;
}
else if (FlxG.Keyboard.AnyPressed(new Keys[] { Keys.Down, Keys.S }) && _currentDirection != FlxObjectDirection.UP)
{
_nextDirection = FlxObjectDirection.DOWN;
}
else if (FlxG.Keyboard.AnyPressed(new Keys[] { Keys.Left, Keys.A }) && _currentDirection != FlxObjectDirection.RIGHT)
{
_nextDirection = FlxObjectDirection.LEFT;
}
else if (FlxG.Keyboard.AnyPressed(new Keys[] { Keys.Right, Keys.D }) && _currentDirection != FlxObjectDirection.LEFT)
{
_nextDirection = FlxObjectDirection.RIGHT;
}
}
void MoveSnake()
{
_headPositions.Insert(0, new Vector2(_snakeHead.X, _snakeHead.Y));
if (_headPositions.Count > _snakeBody.Members.Count)
{
_headPositions.RemoveAt(_headPositions.Count - 1);
}
switch (_nextDirection)
{
case FlxObjectDirection.LEFT:
_snakeHead.X -= BLOCK_SIZE;
break;
case FlxObjectDirection.RIGHT:
_snakeHead.X += BLOCK_SIZE;
break;
case FlxObjectDirection.UP:
_snakeHead.Y -= BLOCK_SIZE;
break;
case FlxObjectDirection.DOWN:
_snakeHead.Y += BLOCK_SIZE;
break;
}
_currentDirection = _nextDirection;
FlxSpriteUtil.ScreenWrap(_snakeHead);
List <Vector2> headpositions = _headPositions.ToList();
for (int i = 0; i < _headPositions.Count; i++)
{
_snakeBody.Members[i].SetPosition(headpositions[i].X, headpositions[i].Y);
}
}
