void BuildPath(int clickedCellIndex)
{
// If clicked cell can't be crossed, return
if (!grid.cells[clickedCellIndex].canCross)
{
return;
}
// Get Path
int cellIndex = grid.CellGetIndex(tokenRow, tokenColumn);
List <int> path = grid.FindPath(cellIndex, clickedCellIndex, movePoints);
if (path != null)
{
movePoints -= path.Count;
// Color the path
for (int k = 0; k < path.Count; k++)
{
grid.CellFlash(path [k], Color.green, 1f);
}
// Start animating/moving the ship
StartCoroutine(MoveShipAlongPath(path));
// Annotate new ship row and column
tokenRow = grid.CellGetRow(clickedCellIndex);
tokenColumn = grid.CellGetColumn(clickedCellIndex);
}
else
{
// Indicate that cell is not reachable
grid.CellFlash(clickedCellIndex, Color.red, 1f);
}
}
void CheckMatchingCells(int cellIndex)
{
if (cellIndex < 0)
{
return;
}
Texture2D selectedFruit = grid.CellGetTexture(cellIndex);
if (selectedFruit == null)
{
return; // empty cell
}
// Checks all directions until all matches are selected and no pending cells remains
List <int> matches = new List <int> ();
matches.Add(cellIndex);
List <int> pending = new List <int> ();
pending.Add(cellIndex);
while (pending.Count > 0)
{
// extract one fruit from the queue
int p = pending [0];
pending.RemoveAt(0);
// check all 4 directions of that cell for new matches
int row = grid.CellGetRow(p);
int col = grid.CellGetColumn(p);
for (int k = 0; k < directions.Length; k++)
{
int row1 = row + directions [k] [0];
int col1 = col + directions [k] [1];
if (row1 >= 0 && row1 < grid.rowCount && col1 >= 0 && col1 < grid.columnCount)
{
int i = grid.CellGetIndex(row1, col1);
Texture2D tex = grid.CellGetTexture(i);
if (tex == selectedFruit && !matches.Contains(i))
{
matches.Add(i);
pending.Add(i);
}
}
}
}
// If there're 3 or more matches remove them
if (matches.Count >= 3)
{
matches.ForEach((int matchingIndex) => {
// Remove fruit
grid.CellSetTexture(matchingIndex, null);
// Produce a nice effect for matching cells
grid.CellFlash(matchingIndex, Color.yellow, 0.25f);
});
StartCoroutine(MakeFruitsFall());
}
}