/// <summary>
/// sets current tetronimo to next and picks a new one for the next tetronimo
/// also checks if the current one fits and if not ends the game
/// </summary>
private void SpawnNewTetronimo()
{
_currentTetronimo = _currentTetronimo == null?GetRandomTetronimo() : _nextTetronimo;
_nextTetronimo = GetRandomTetronimo();
PlaceCurrentTetronimo();
if (!_currentTetronimo.Fits()) // if it doesn't fit anymore the player has lost
{
lost = true;
}
}
/// <summary>
/// Draw a tetronimo in a rect
/// </summary>
/// <param name="spriteBatch">the thing used to draw</param>
/// <param name="tetronimo">the tetronimo to draw</param>
/// <param name="rect">the rect in which to draw</param>
private void DrawTetronimoInRect(SpriteBatch spriteBatch, Tetronimo tetronimo, Rectangle rect)
{
//draws the tetronimo centered in the grid
tetronimo?.Draw(spriteBatch, _offset + (new Vector2(rect.X, rect.Y) + (new Vector2(rect.Width, rect.Height) - tetronimo.Size) / 2) * Tetronimo.BlockSize);
}
/// <summary>
/// handles the logic for the grid
/// </summary>
/// <param name="gameTime"></param>
public void Update(GameTime gameTime)
{
if (lost)
{
return;
}
float deltaTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
_inputHelper.Update(gameTime);
if (_movementTimer <= 0)
{
if (_inputHelper.KeyDown(_right))
{
if (_currentTetronimo.Move(new Point(1, 0)))
{
_movementTimer = MovementTimerReset;
}
}
else if (_inputHelper.KeyDown(_left))
{
if (_currentTetronimo.Move(new Point(-1, 0)))
{
_movementTimer = MovementTimerReset;
}
}
}
else
{
_movementTimer -= deltaTime;
}
if (_gravityTimer <= 0)
{
if (!_currentTetronimo.Move(new Point(0, 1)))
{
PlaceInGrid();
}
_gravityTimer = GravityTimerReset - GravityTimerSubtractPerLevel * Math.Min(MaxLevel, _clearedLines / LinesPerLevel);
}
else
{
_gravityTimer -= deltaTime * (_inputHelper.KeyDown(_down) ? DownPressGravityMultiplier : 1);
}
if (_inputHelper.KeyPressed(_rotate))
{
_currentTetronimo.Rotate(true);
}
if (_inputHelper.KeyPressed(_place))
{
while (_currentTetronimo.Move(new Point(0, 1)))
{
;
}
PlaceInGrid();
}
if (_inputHelper.KeyPressed(_hold) && !_hasHeld)
{
var temp = _holdTetronimo;
_holdTetronimo = _currentTetronimo;
_holdTetronimo.position = Point.Zero;
if (temp == null)
{
SpawnNewTetronimo();
}
else
{
_currentTetronimo = temp;
PlaceCurrentTetronimo();
}
_hasHeld = true;
}
}