private int EdgeCoverage(int x, int y, bool[,] continuousVisited, bool[,] edgesVisited, Color[,] board)
{
continuousVisited.SetAt(x, y, true);
Color thisColor = board.GetAt(x, y);
int result = 0;
if (board.CanGetLeft(x) && !continuousVisited.GetLeftOf(x, y))
{
if (thisColor == board.GetLeftOf(x, y))
result += EdgeCoverage(x - 1, y, continuousVisited, edgesVisited, board);
else if (!edgesVisited.GetLeftOf(x, y))
{
edgesVisited.SetLeftOf(x, y, true);
result++;
}
}
if (board.CanGetAbove(y) && !continuousVisited.GetAboveOf(x, y))
{
if (thisColor == board.GetAboveOf(x, y))
result += EdgeCoverage(x, y - 1, continuousVisited, edgesVisited, board);
else if (!edgesVisited.GetAboveOf(x, y))
{
edgesVisited.SetAboveOf(x, y, true);
result++;
}
}
if (board.CanGetRight(x) && !continuousVisited.GetRightOf(x, y))
{
if (thisColor == board.GetRightOf(x, y))
result += EdgeCoverage(x + 1, y, continuousVisited, edgesVisited, board);
else if (!edgesVisited.GetRightOf(x, y))
{
edgesVisited.SetRightOf(x, y, true);
result++;
}
}
if (board.CanGetBelow(y) && !continuousVisited.GetBelowOf(x, y))
{
if (thisColor == board.GetBelowOf(x, y))
result += EdgeCoverage(x, y + 1, continuousVisited, edgesVisited, board);
else if (!edgesVisited.GetBelowOf(x, y))
{
edgesVisited.SetBelowOf(x, y, true);
result++;
}
}
return result;
}
//private static TreeNode[,] ToTreeNode(MapNode[,] lookup)
//{
// TreeNode[,] treeLookup = new TreeNode[lookup.Height(), lookup.Width()];
// for (int y = 0; y < lookup.Height(); y++)
// {
// for (int x = 0; x < lookup.Width(); x++)
// {
// TreeNode treeNode = new TreeNode(lookup.GetAt(x, y).Color);
// treeLookup.SetAt(x, y, treeNode);
// throw new NotImplementedException("Doesn't keep the same reference for touching colors");
// }
// }
// return treeLookup;
//}
private static MapNode[,] BuildLookupGrid(Color[,] board)
{
MapNode[,] lookup = new MapNode[board.Height(), board.Width()];
//build lookup
for (int y = 0; y < board.Height(); y++)
{
for (int x = 0; x < board.Width(); x++)
{
//Create MapNode
bool isLeftSame = board.CanGetLeft(x) && board.GetAt(x, y) == board.GetLeftOf(x, y);
bool isAboveSame = board.CanGetAbove(y) && board.GetAt(x, y) == board.GetAboveOf(x, y);
if (isLeftSame && isAboveSame) //check above & to the left
{
MapNode left = lookup.GetLeftOf(x, y);
MapNode above = lookup.GetAboveOf(x, y);
lookup.SetAt(x, y, left);
if (left != above)
{
left.Merge(above);
//update "above's" references to left
for (int updateY = y; updateY >= 0; updateY--)
{
for (int updateX = x; updateX >= 0; updateX--)
{
if (lookup.GetAt(updateX, updateY) == above)
lookup.SetAt(updateX, updateY, left);
}
}
}
}
else if (isLeftSame) // check to the left
{
lookup.SetAt(x, y, lookup.GetLeftOf(x, y));
}
else if (isAboveSame) // check above
{
lookup.SetAt(x, y, lookup.GetAboveOf(x, y));
}
else
{
lookup.SetAt(x, y, new MapNode(board.GetAt(x, y)));
}
}
}
return lookup;
}