public bool CollisionDetect(int x, int y, Tetris piece)
{
bool _returnValue = false;
//Check bounds
if (y > _columns || x > _rows || y < 0 || x < 0)
{
_returnValue = true;
}
//check can drop
_returnValue = !CanDrop(x, y, piece);
if (_returnValue)
{
for (int yi = 0; yi <= 3; yi++)
{
for (int xi = 0; xi <= 3; xi++)
{
if (piece.Piece[xi + yi * 4])
{
_lines[y + yi][x + xi] = (byte)piece.Character;
}
}
}
}
//check completed rows
int _completedRows = 0;
for (int i = 0; i < _lines.Count; i++)
{
if (FullRow(_lines[i]))
{
_completedRows++;
_lines.RemoveAt(i);
}
}
if (_completedRows > 0 && CountScore != null)
{
CountScore(_completedRows);
}
//Add new empty rows to the top of the screen
for (int i = 0; i < _lines.Count - _rows; i++)
{
_lines.Insert(0, NewLine());
}
return(_returnValue);
}
public bool CanRight(int x, int y, Tetris piece)
{
if (x >= _columns)
{
return(false);
}
int yp, xp;
int _rightMost = _columns;
for (int xi = 0; xi <= 3; xi++)
{
for (int yi = 0; yi <= 3; yi++)
{
yp = y + yi;
xp = x + xi - 1;
if (piece.Piece[xi + yi * 4])
{
if (x > _rightMost)
{
_rightMost = x;
}
if (_lines[yp][xp] != 0xff)
{
return(false);
}
}
}
}
if (_rightMost - x >= _columns)
{
return(false);
}
return(true);
}
public bool CanLeft(int x, int y, Tetris piece)
{
if (x <= 0)
{
return(false);
}
int yp, xp;
int _leftMost = _columns;
for (int xi = 0; xi <= 3; xi++)
{
for (int yi = 0; yi <= 3; yi++)
{
yp = y + yi;
xp = x + xi;
if (piece.Piece[xi + yi * 4])
{
if (x < _leftMost)
{
_leftMost = x;
}
if (_lines[yp][xp] != 0xff)
{
return(false);
}
}
}
}
if (_leftMost + x < 0)
{
return(false);
}
return(true);
}
