public void DestroyGem(Gem gem)
{
gemPoolDict[gem.type].Release(gem.gameObject);
}
/// <summary>
/// Detect possible swaps.
/// </summary>
public MatchSwap?DetectSwap(LevelMap map)
{
for (int i = 1; i < map.Height - 1; ++i)
{
for (int j = 0; j < map.Width; ++j)
{
// Get gem type of neighbour gems.
GemType self = map[i, j];
GemType left = (j > 0) ? map[i, j - 1] : GemType.None;
GemType right = (j < map.Width - 1) ? map[i, j + 1] : GemType.None;
GemType up = map[i - 1, j];
GemType down = map[i + 1, j];
bool upDownMatched = Gem.IsMatched(up, down);
bool upSelfMatched = Gem.IsMatched(up, self);
bool downSelfMatched = Gem.IsMatched(down, self);
// up X O X down
if (upDownMatched && !upSelfMatched)
{
GemType matchedType = Gem.GetMatchedGemType(up, down);
if (Gem.IsMatched(matchedType, left))
{
return(CreateMatchSwap(j, i, j - 1, i, matchedType));
}
if (Gem.IsMatched(matchedType, right))
{
return(CreateMatchSwap(j, i, j + 1, i, matchedType));
}
}
// Magic Gem may apply to both cases below
// so we have to check both cases separately
// up X X O down
if (upSelfMatched)
{
GemType matchedType = Gem.GetMatchedGemType(up, self);
MatchSwap?swap = DetectGemSwap(map, j, i + 1, matchedType, new Vector2Int(0, -1));
if (swap.HasValue)
{
return(swap);
}
}
// up O X X down
if (downSelfMatched)
{
GemType matchedType = Gem.GetMatchedGemType(down, self);
MatchSwap?swap = DetectGemSwap(map, j, i - 1, matchedType, new Vector2Int(0, 1));
if (swap.HasValue)
{
return(swap);
}
}
}
}
return(null);
}