private bool IsValidDot(Dot hitDot)
{
return
(hitDot.Color == MatchingColor &&
hitDot.Coordinate.IsNeighbor(LastDotHit.Coordinate) &&
(hitDot == PreviousChainHead || !LastDotHit.IsConnectedTo(hitDot)) &&
LastDotHit.CanAddAnotherChain());
}
void TryAddDot(Dot hitDot)
{
// Don't interact with any dot that is currently moving
if (hitDot.GridBox.IsUpdatingCoordinate)
{
return;
}
// If set is empty, add it
if (dotsInteracting.Count == 0)
{
dotsInteracting.Add(hitDot);
MatchingColor = hitDot.Color;
DrawCursorChain(hitDot);
}
else if (IsValidDot(hitDot))
{
// If same dot as previous hit, undo chain
if (hitDot == PreviousChainHead)
{
PreviousChainHead.RemoveChain(LastDotHit);
dotsInteracting.RemoveAt(LastIndexOfDotsInteracting);
}
// Add Chain
else
{
Chain newChain = CreateChain();
if (newChain != null)
{
newChain.Initialize(LastDotHit);
newChain.ConnectTo(hitDot);
LastDotHit.AddChain(newChain);
}
dotsInteracting.Add(hitDot);
}
DrawCursorChain(hitDot);
}
}