/// <summary>
/// Checks whether the given tetrisBlock can be on given coords
/// </summary>
/// <param name="block">GameBlock</param>
/// <param name="x">X coord</param>
/// <param name="y">Y coord</param>
/// <returns>True if block can be on given coords</returns>
private bool Check(ByteMatrix block, int x, int y)
{
for (int row = 0; row < block.Rows; row++)
{
for (int col = 0; col < block.Columns; col++)
{
int newX = col + x;
int newY = row + y;
// if block is out of the field then return false
if ((newX < 0 || newX > FIELD_COLS - 1 || newY < 0 || newY > FIELD_ROWS - 1) && block.GetCell(row, col) != 0)
{
return(false);
}
// if block is in the field but there is no free place to fall, return false
if (!(newX < 0 || newX > FIELD_COLS - 1 || newY < 0 || newY > FIELD_ROWS - 1))
{
if (field.GetCell(newY, newX) != 0 && block.GetCell(row, col) != 0)
{
return(false);
}
}
}
}
return(true);
}
/// <summary>
/// Rotate current block
/// </summary>
public void Rotate()
{
ByteMatrix rotated = new ByteMatrix(currentBlock.Columns, currentBlock.Rows);
// Rotate the object
for (int row = 0; row < currentBlock.Rows; row++)
{
for (int col = 0; col < currentBlock.Columns; col++)
{
rotated.SetCell(rotated.Rows - col - 1, row, currentBlock.GetCell(row, col));
}
}
// Check whether rotate object fits the field
if (Check(rotated, blockX, blockY))
{
currentBlock = new ByteMatrix(rotated);
}
}
/// <summary>
/// Checks whether the given tetrisBlock can be on given coords
/// </summary>
/// <param name="block">GameBlock</param>
/// <param name="x">X coord</param>
/// <param name="y">Y coord</param>
/// <returns>True if block can be on given coords</returns>
private bool Check(ByteMatrix block, int x, int y)
{
for (int row = 0; row < block.Rows; row++)
for (int col = 0; col < block.Columns; col++)
{
int newX = col + x;
int newY = row + y;
// if block is out of the field then return false
if ((newX < 0 || newX > FIELD_COLS - 1 || newY < 0 || newY > FIELD_ROWS - 1) && block.GetCell(row, col) != 0)
return false;
// if block is in the field but there is no free place to fall, return false
if (!(newX < 0 || newX > FIELD_COLS - 1 || newY < 0 || newY > FIELD_ROWS - 1))
if (field.GetCell(newY, newX) != 0 && block.GetCell(row, col) != 0)
return false;
}
return true;
}
