/// <summary>
/// Collapses the array on the specific columns, after checking for empty items on them
/// </summary>
/// <param name="columns"></param>
/// <returns>Info about the GameObjects that were moved</returns>
public AlteredCandy Collapse(IEnumerable<int> columns)
{
AlteredCandy collapseInfo = new AlteredCandy();
///search in every column
foreach (var column in columns)
{
//begin from bottom row
for (int row = 0; row < Constants.Rows - 1; row++)
{
//if you find a null item
if (shapes[row, column] == null)
{
//start searching for the first non-null
for (int row2 = row + 1; row2 < Constants.Rows; row2++)
{
//if you find one, bring it down (i.e. replace it with the null you found)
if (shapes[row2, column] != null)
{
shapes[row, column] = shapes[row2, column];
shapes[row2, column] = null;
//calculate the biggest distance
if (row2 - row > collapseInfo.MaxDistance)
collapseInfo.MaxDistance = row2 - row;
//assign new row and column (name does not change)
shapes[row, column].GetComponent<Shape>().Row = row;
shapes[row, column].GetComponent<Shape>().Column = column;
collapseInfo.AddCandy(shapes[row, column]);
break;
}
}
}
}
}
return collapseInfo;
}
/// <summary>
/// Spawns new candy in columns that have missing ones
/// </summary>
/// <param name="columnsWithMissingCandy"></param>
/// <returns>Info about new candies created</returns>
private AlteredCandy CreateNewCandyInSpecificColumns(IEnumerable<int> columnsWithMissingCandy)
{
AlteredCandy newCandyInfo = new AlteredCandy();
//find how many null values the column has
foreach (int column in columnsWithMissingCandy)
{
var emptyItems = shapes.GetEmptyItemsOnColumn(column);
foreach (var item in emptyItems)
{
var go = GetRandomCandy();
GameObject newCandy = Instantiate(go, SpawnPositions[column], Quaternion.identity)
as GameObject;
newCandy.GetComponent<Shape>().Assign(go.GetComponent<Shape>().Type, item.Row, item.Column);
if (Constants.Rows - item.Row > newCandyInfo.MaxDistance)
newCandyInfo.MaxDistance = Constants.Rows - item.Row;
shapes[item.Row, item.Column] = newCandy;
newCandyInfo.AddCandy(newCandy);
}
}
return newCandyInfo;
}