private void HideCurrentTetris()
{
TetrisBlock[,] blocks = m_blocks;
Tetris tetris = m_tetris;
ushort matrix = tetris.GetMatrix();
int b = TETRIS_MAX_M * TETRIS_MAX_N - 1;
for (int i = 0; i < TETRIS_MAX_M; ++i)
{
for (int j = 0; j < TETRIS_MAX_N; ++j)
{
int offset = b - (i * TETRIS_MAX_N + j);
int row = i + m_row;
int col = j + m_col;
if (row < 0 || row >= TETRIS_MAX_ROWS || col < 0 || col >= TETRIS_MAX_COLUMNS)
{
continue;
}
if (((matrix >> offset) & 1) == 1)
{
blocks[row, col].Fill = null;
}
}
}
}
private void RenderCurrentTetris(int offsetX, int offsetY, Brush fill)
{
HideCurrentTetris();
m_row += offsetX;
m_col += offsetY;
TetrisBlock[,] blocks = m_blocks;
Tetris tetris = m_tetris;
int b = TETRIS_MAX_M * TETRIS_MAX_N - 1;
ushort matrix = tetris.GetMatrix();
for (int i = 0; i < TETRIS_MAX_M; ++i)
{
for (int j = 0; j < TETRIS_MAX_N; ++j)
{
int row = i + m_row;
int col = j + m_col;
if (row < 0 || col < 0 || row >= TETRIS_MAX_ROWS || col >= TETRIS_MAX_COLUMNS)
{
continue;
}
int offset = b - (i * TETRIS_MAX_N + j);
if (((matrix >> offset) & 1) == 1)
{
blocks[row, col].Fill = (fill != null ? fill : tetris.Fill);
}
}
}
}
private void DrawNextTetris()
{
TetrisBlock[,] nextBlocks = m_nextBlocks;
Tetris nextTetris = m_nextTetris;
ReDrawTetris(nextBlocks, nextTetris.GetMatrix(), TETRIS_MAX_M, TETRIS_MAX_N, 0, 0, nextTetris.Fill);
}
/// <summary>
/// Moves down.
/// </summary>
public void MoveDown()
{
if (IsRunning)
{
Tetris tetris = m_tetris;
ushort matrix = tetris.GetMatrix();
if (HitTest(matrix, 1, 0))
{
RenderCurrentTetris(0, 0, Brushes.Teal);
TryClearLines();
if (DetectGameOver())
{
OnGameOver();
}
else
{
CreateNextTetris();
}
}
else
{
RenderCurrentTetris(1, 0);
}
}
}
/// <summary>
/// Rotates
/// </summary>
public void Rotate()
{
if (IsRunning)
{
Tetris tetris = m_tetris;
ushort matrix = tetris.GetMatrix();
if (!HitTest(matrix, 0, 0))
{
tetris.MatrixTransform();
}
RenderCurrentTetris(0, 0);
}
}
/// <summary>
/// Moves right.
/// </summary>
public void MoveRight()
{
if (IsRunning)
{
Tetris tetris = m_tetris;
ushort matrix = tetris.GetMatrix();
if (HitTest(matrix, 0, 1))
{
RenderCurrentTetris(0, 0);
}
else
{
RenderCurrentTetris(0, 1);
}
}
}