/// <summary>
/// Check if both corners are touching in another group, if so, combine groups
/// </summary>
/// <param name="dir"></param>
/// <returns></returns>
public bool CanCombine(Direction dir)
{
Block other1 = null;
Block other2 = null;
Group otherGroup = null;
switch (dir)
{
case Direction.up:
other1 = data.topLeft.SameAdjacent(Direction.up);
other2 = data.topRight.SameAdjacent(Direction.up);
break;
case Direction.right:
other1 = data.topRight.SameAdjacent(Direction.right);
other2 = data.bottomRight.SameAdjacent(Direction.right);
break;
case Direction.down:
other1 = data.bottomLeft.SameAdjacent(Direction.down);
other2 = data.bottomRight.SameAdjacent(Direction.down);
break;
case Direction.left:
other1 = data.topLeft.SameAdjacent(Direction.left);
other2 = data.bottomLeft.SameAdjacent(Direction.left);
break;
default:
return(false);
}
if (other1 == null || other2 == null)
{
return(false);
}
//If other1 and other 2 are grouped and if they're part of the same group
if (other1.IsGrouped() == true && other2.IsGrouped() == true && other1.GetGroup().Equals(other2.GetGroup()))
{
//If other blocks are corner blocks, then it can expand
otherGroup = other1.GetGroup();
switch (dir)
{
case Direction.up:
if (other1.Equals(otherGroup.data.bottomLeft) && other2.Equals(otherGroup.data.bottomRight))
{
return(true);
}
break;
case Direction.right:
if (other1.Equals(otherGroup.data.topLeft) && other2.Equals(otherGroup.data.bottomLeft))
{
return(true);
}
break;
case Direction.down:
if (other1.Equals(otherGroup.data.topLeft) && other2.Equals(otherGroup.data.topRight))
{
return(true);
}
break;
case Direction.left:
if (other1.Equals(otherGroup.data.topRight) && other2.Equals(otherGroup.data.bottomRight))
{
return(true);
}
break;
default:
break;
}
}
return(false);
}
public void Expand(Direction dir)
{
Block other1 = null;
Block other2 = null;
switch (dir)
{
case Direction.up:
other1 = data.topLeft.SameAdjacent(Direction.up);
other2 = data.topRight.SameAdjacent(Direction.up);
if (other1 == null || other2 == null)
{
return;
}
data.topLeft = other1;
data.topRight = other2;
//Iterate from topLeft to topRight (right)
OnIterate = IterateRight;
OnExpand = IncrementHeight;
break;
case Direction.right:
other1 = data.topRight.SameAdjacent(Direction.right);
other2 = data.bottomRight.SameAdjacent(Direction.right);
if (other1 == null || other2 == null)
{
return;
}
data.topRight = other1;
data.bottomRight = other2;
//Iterate from topRight to bottomRight (down)
OnIterate = IterateDown;
OnExpand = IncrementWidth;
break;
case Direction.down:
other1 = data.bottomLeft.SameAdjacent(Direction.down);
other2 = data.bottomRight.SameAdjacent(Direction.down);
if (other1 == null || other2 == null)
{
return;
}
data.bottomLeft = other1;
data.bottomRight = other2;
//Iterate from bottomLeft to bottomRight (right)
OnIterate = IterateRight;
OnExpand = IncrementHeight;
break;
case Direction.left:
other1 = data.topLeft.SameAdjacent(Direction.left);
other2 = data.bottomLeft.SameAdjacent(Direction.left);
if (other1 == null || other2 == null)
{
return;
}
data.topLeft = other1;
data.bottomLeft = other2;
//Iterate from topLeft to bottomLeft (down)
OnIterate = IterateDown;
OnExpand = IncrementWidth;
break;
default:
return;
}
//Get blocks adjacent to the corners
other2.groupable.SetGroup(this);
blocks.Add(other2);
while (!other1.Equals(other2) && other1 != null)
{
blocks.Add(other1);
other1.groupable.SetGroup(this);
other1 = OnIterate(other1);
}
OnExpand();
OnIterate = null;
OnExpand = null;
}
