/// <summary>
/// Attempts to shift the GridPieces in this tile in the specified direction. Returns the success of the shifting.
/// </summary>
/// <param name="dir">The direction we want to shift</param>
public bool Shift(int xDir, int yDir)
{
// Perform the checks
foreach (GridPiece gp in GridPieces)
{
int newX = gp.gSlot.GridPositionX + xDir;
int newY = gp.gSlot.GridPositionY + yDir;
// We are trying to shift out of bounds.
if(newX >= Level.HORIZONTAL_GRID_SPACES || newY >= Level.VERTICAL_GRID_SPACES || newX < 0 || newY < 0)
return false;
GridSlot gs = Level.Grid[newX, newY];
// If the GridPiece in the GridSlot we are looking at does not belong to our Tile, we can't shift.
if (gs.gPiece != null && !GridPieces.Contains(gs.gPiece))
return false;
}
#region Save a state of the old grid
GridPiece[,] OldGrid = new GridPiece[Level.HORIZONTAL_GRID_SPACES, Level.VERTICAL_GRID_SPACES];
for (int i = 0; i < Level.HORIZONTAL_GRID_SPACES; i++)
{
for (int j = 0; j < Level.VERTICAL_GRID_SPACES; j++)
{
OldGrid[i, j] = Level.Grid[i, j].gPiece;
}
}
#endregion
// Loops through each piece on the board, and shifts it
for (int i = 0; i < Level.HORIZONTAL_GRID_SPACES; i++)
{
for (int j = 0; j < Level.VERTICAL_GRID_SPACES; j++)
{
// If this GridSlot has a GridPiece that belongs to this tile, perform actions on it.
if (GridPieces.Contains(OldGrid[i, j]))
{
// Shift the GridPiece to the next GridSlot in the specified direction
Level.Grid[i + xDir, j + yDir].PutInPiece(OldGrid[i, j]);
// Changes the position of the objects in the piece
int xMove = (i * Level.GRID_WIDTH) - ((i + xDir) * Level.GRID_WIDTH);
int yMove = (j * Level.GRID_HEIGHT) - ((j + yDir) * Level.GRID_HEIGHT);
OldGrid[i, j].MoveHitBoxes(xMove, yMove);
// Remove this GridPiece from the GridSlot before it moved
if (Level.Grid[i, j].gPiece.Equals(OldGrid[i, j]))
{
Level.Grid[i, j].RemovePiece();
}
}
}
}
// If we have reached this point, we have successfully moved the piece.
return true;
}
/// <summary>
/// Adds a new GridPiece to our overall Tile.
/// </summary>
/// <param name="g">The GridPiece we are adding to our Tile.</param>
public void Add(GridPiece g)
{
GridPieces.Add(g);
}