private void MoveBlockDown()
{
curBlock.MoveDown(dy);
if (grid.IsCollision())
{
if (curBlock.y <= 2)
{
curBlock.MoveUp(dy);
this.Invalidate();
isGameOver = true;
return;
}
curBlock.MoveUp(dy);
grid.AddBlockToGrid();
int lines = grid.ClearLines();
totLines += lines;
score += lines * modifier;
// give a 2x modifier for 3 cleared lines; another 2x for 4 cleared lines
if (lines >= 3)
{
lblBonus.Visible = true;
modifier *= 2;
}
if (lines == 4)
{
modifier *= 2;
}
curBlock = grid.CreateNewBlock(nextBlock.type, gridWidth / 2 - 1, 0);
nextBlock = new TetrisBlock(RandomBlock(), 12, 12, scaleX, scaleY);
}
}
