private void InitializeGame()
{
//Cache grid data.
gridInfo = GridGenerator.Instance.GridInfo;
itemCells.Clear();
foreach (KeyValuePair <Vector2, Cell> kvp in gridInfo)
{
//Reset cells.
kvp.Value.cellMonobehaviour.ResetData();
//CacheItemCells();
if (kvp.Value.cellMonobehaviour.ContainsItem)
{
itemCells.Add(kvp.Value.cellMonobehaviour);
}
}
//Make cell(0,0) as selected on start.
currentCell = gridInfo[new Vector2(0, 0)];
currentCell.cellMonobehaviour.Select();
lastClickedCell = currentCell.cellMonobehaviour;
itemCellsFound = 0;
moves = Constants.MAX_MOVES;
UIManager.Instance.UpdateMoves(moves);
}
/// <summary>
/// Checks if a cell contains an item, otherwise finds closest item cell.
/// </summary>
/// <param name="position">Position of current cell</param>
/// <returns>Distance(Cell count) to closest item cell</returns>
public int DistanceToNearestItemCell(CellMono cell)
{
//If current cell contains an item return.
if (cell.ContainsItem)
{
return(0);
}
else
{
Vector2 pos = cell.gridIndex;
Vector2 closestItemCellIndex = itemCells[0].gridIndex;
//Assuming the minimum distance is between pos and first cell in itemCells.
int minDistance = (int)Mathf.Max(Mathf.Abs(pos.x - itemCells[0].gridIndex.x), Mathf.Abs(pos.y - itemCells[0].gridIndex.y));
int distance = 0;
for (int i = 1; i < itemCells.Count; i++)
{
distance = (int)Mathf.Max(Mathf.Abs(pos.x - itemCells[i].gridIndex.x), Mathf.Abs(pos.y - itemCells[i].gridIndex.y));
if (distance < minDistance)
{
minDistance = distance;
closestItemCellIndex = itemCells[i].gridIndex;
}
}
return(minDistance);
}
}
/// <summary>
/// Called when user clicks on a cell.
/// </summary>
/// <param name="cell"></param>
public void OnClickedCell(CellMono cell)
{
if (lastClickedCell.Equals(cell))
{
return;
}
//Check if moves are over.
if (moves <= 0)
{
UIManager.Instance.ShowPopup(Constants.MOVES_OVER);
return;
}
//Update moves
moves--;
UIManager.Instance.UpdateMoves(moves);
ExamineCell(cell);
//Check if all item cells found.
if (itemCellsFound == Constants.MAX_ITEMS_CELLS)
{
UIManager.Instance.ShowPopup(Constants.WIN_MESSAGE);
}
}
/// <summary>
/// Examines a cell and its neighbours for item cells and sets appropriate color.
/// </summary>
/// <param name="cell">Cell to be examined.</param>
private void ExamineCell(CellMono cell)
{
Vector2 source = cell.gridIndex;
int distance = DistanceToNearestItemCell(cell);
if (distance == 0)
{
cell.onProcessed.Invoke(ItemColor.Red);
itemCellsFound++;
}
else if (distance <= 2)
{
cell.onProcessed.Invoke(ItemColor.Yellow);
}
else
{
cell.onProcessed.Invoke(ItemColor.Green);
}
lastClickedCell = cell;
}
/// <summary>
/// Initialzes grid and computes links between cells.
/// </summary>
private void InitializeGridInfo()
{
int cellIndex = 0;
for (int i = 0; i < rows; i++) //Rows
{
for (int j = 0; j < columns; j++) //Columns
{
Vector2 index = new Vector2(i, j);
CellMono cellMono = cells[cellIndex];
//Create cell object
Cell cell = new Cell(index, cellMono);
gridInfo.Add(index, cell);
cellIndex++;
//Making all the cells as unvisited by default.
unVisited.Add(cell);
}
}
ComputeLinks();
}
/// <summary>
/// Generates a grid of specified size(rows and columns).
/// </summary>
private void GenerateGrid()
{
Vector2 currentSpawnPosition = initialPosition;
for (int i = 0; i < rows; i++) //Rows
{
for (int j = 0; j < columns; j++) //Columns
{
Vector2 index = new Vector2(i, j);
GameObject obj = Instantiate(cellPrefab, currentSpawnPosition, cellPrefab.transform.rotation, gridParent);
obj.name = "Cell(" + i + "," + j + ")";
CellMono cellM = obj.GetComponent <CellMono>();
cellM.Init(index, "(" + i + ", " + j + ")");
Cell cell = new Cell(index, cellM);
gridInfo.Add(index, cell);
//Making all the cells as unvisited by default.
unVisited.Add(cell);
//Set y as per cell size.
currentSpawnPosition.y += cellSize;
}
//Reset y for next column
currentSpawnPosition.y = initialPosition.y;
currentSpawnPosition.x += cellSize;
}
ComputeLinks();
//DisplayNeighbourInfo();
}
/// <summary>
/// Constructor to initialize cell object.
/// </summary>
/// <param name="pos">Index of the cell in grid</param>
/// <param name="cellM">Reference to CellMono script</param>
public Cell(Vector2 pos, CellMono cellM)
{
this.position = pos;
this.cellMonobehaviour = cellM;
}