public bool MoveRight(Grid grid)
{
bool canMove = true;
int[] newX = new int[Constants.BlockPerPiece];
// Calculate the new coordinates
for (uint i = 0; i < Constants.BlockPerPiece ; i++)
{
newX[i] = _blocks[i]._x + 1 ;
}
// Check if the piece can be moved
for (uint i = 0 ; i < Constants.BlockPerPiece ; i++)
{
if (grid.isOutOfGrid(newX[i], _blocks[i]._y) || grid.isBlock(newX[i], _blocks[i]._y))
{
canMove = false;
}
}
// Rotate the piece if it can be rotated
for (uint i = 0 ; canMove && i < Constants.BlockPerPiece ; i++)
{
_blocks[i]._x = newX[i];
}
return canMove;
}
private bool pieceCanMove(Grid grid, int[] newX, int[] newY)
{
bool canRotate = true;
if(grid != null)
{
// First we need to check if the piece is too high
// In this case, we need to make it go down
int offsetDown = 0;
for(uint i = 0 ; i < Constants.BlockPerPiece; i++)
{
if(newY[i] - offsetDown > Constants.GridSizeYmax)
offsetDown = newY[i] - Constants.GridSizeYmax;
}
if(offsetDown > 0)
{
for(uint i = 0 ; i < Constants.BlockPerPiece; i++)
{
newY[i] -= offsetDown;
}
}
// We are going to make 3 iterations to find a position that is good
// First with the position already calculated, then with a shift to the right
// and finally with a shift to the left
int iteration = 0;
do
{
if(iteration == 1)
{
// We shift to the left
for (uint i = 0 ; i < Constants.BlockPerPiece; i++)
{
newX[i]--;
}
canRotate = true;
}
else if(iteration == 2)
{
// We shift to the right
for (uint i = 0 ; i < Constants.BlockPerPiece; i++)
{
newX[i] += 2;
}
canRotate = true;
}
for (uint i = 0 ; i < Constants.BlockPerPiece; i++)
{
if (grid.isOutOfGrid(newX[i], newY[i]) || grid.isBlock(newX[i], newY[i]))
{
canRotate = false;
break;
}
}
iteration++;
} while(!canRotate && iteration < 3);
}
return canRotate;
}
public bool MoveDown(Grid grid)
{
bool canMove = true;
int[] newY = new int[Constants.BlockPerPiece];
// Calculate the new coordinates
for (uint i = 0; i < Constants.BlockPerPiece; i++)
{
newY[i] = _blocks[i]._y - 1 ;
}
// Check if the piece can be moved
for (uint i = 0 ; i < Constants.BlockPerPiece ; i++)
{
if (grid.isOutOfGrid(_blocks[i]._x, newY[i]) || grid.isBlock(_blocks[i]._x, newY[i]))
{
canMove = false;
break;
}
}
// Validate the new position if it is ok
if(canMove)
{
for (uint i = 0 ; i < Constants.BlockPerPiece ; i++)
{
_blocks[i]._y = newY[i];
}
}
return canMove;
}
