/// <summary>
/// Searches for a bubble group in which the specified bubble
/// is a member. If a group is found, this object's BubblesInGroup
/// collection will contain the bubbles in that group afterwards.
/// </summary>
/// <param name="bubble">
/// The bubble with which to begin searching for a group.
/// </param>
/// <returns>
/// Returns this object, enabling a fluid-style API usage.
/// </returns>
internal _3BGroup FindBubbleGroup(_GAME_3BViewModel bubble)
{
if (bubble == null)
{
throw new ArgumentNullException("bubble");
}
bool isBubbleInCurrentGroup = this.BubblesInGroup.Contains(bubble);
if (!isBubbleInCurrentGroup)
{
this.BubblesInGroup.Clear();
this.SearchForGroup(bubble);
bool addOriginalBubble =
this.HasBubbles &&
!this.BubblesInGroup.Contains(bubble);
if (addOriginalBubble)
{
this.BubblesInGroup.Add(bubble);
}
}
return(this);
}
IEnumerable <_GAME_3BViewModel> FindMatchingNeighbors(_GAME_3BViewModel bubble)
{
var matches = new List <_GAME_3BViewModel>();
// Check above.
var match = this.TryFindMatch(bubble.Row - 1, bubble.Column, bubble.BubbleType);
if (match != null)
{
matches.Add(match);
}
// Check below.
match = this.TryFindMatch(bubble.Row + 1, bubble.Column, bubble.BubbleType);
if (match != null)
{
matches.Add(match);
}
// Check left.
match = this.TryFindMatch(bubble.Row, bubble.Column - 1, bubble.BubbleType);
if (match != null)
{
matches.Add(match);
}
// Check right.
match = this.TryFindMatch(bubble.Row, bubble.Column + 1, bubble.BubbleType);
if (match != null)
{
matches.Add(match);
}
return(matches);
}
static Duration CalculateDuration(
_GAME_3BTaskType taskType,
_GAME_3BViewModel bubble,
int millisecondsPerUnit)
{
int totalMilliseconds;
switch (taskType)
{
case _GAME_3BTaskType.Burst:
totalMilliseconds = millisecondsPerUnit;
break;
case _GAME_3BTaskType.MoveDown:
totalMilliseconds = millisecondsPerUnit * Math.Abs(bubble.Row - bubble.PreviousRow);
break;
case _GAME_3BTaskType.MoveRight:
totalMilliseconds = millisecondsPerUnit * Math.Abs(bubble.Column - bubble.PreviousColumn);
break;
default:
throw new ArgumentException("Unrecognized BubblesTaskType value: " + taskType, "taskType");
}
return new Duration(TimeSpan.FromMilliseconds(totalMilliseconds));
}
void SearchForGroup(_GAME_3BViewModel bubble)
{
if (bubble == null)
{
throw new ArgumentNullException("bubble");
}
foreach (_GAME_3BViewModel groupMember in this.FindMatchingNeighbors(bubble))
{
if (!this.BubblesInGroup.Contains(groupMember))
{
this.BubblesInGroup.Add(groupMember);
this.SearchForGroup(groupMember);
}
}
}