bool FloodFillRemoveMatchesFromTile(Board board, ref Tile t, Board.Axis axis)
{
bool foundAnyMatches = false;
List <Tile> matchingAxis = VerifyMatchesOnAxis(board, t, axis);
matchingAxis.Add(t);
while (matchingAxis.Count >= 3)
{
foundAnyMatches = true;
for (int i = 0; i < matchingAxis.Count; i++)
{
Tile currT = matchingAxis[i];
TileProcessor.inst.CycleTileID(board, ref currT);
matchingAxis = VerifyMatchesOnAxis(board, t, axis);
if (matchingAxis.Count < 3)
{
matchingAxis.Remove(currT);
Board.Axis otherAxis = axis == Board.Axis.HORIZONTAL ?
Board.Axis.VERTICAL :
Board.Axis.HORIZONTAL;
for (int i2 = 0; i2 < matchingAxis.Count; i2++)
{
Tile currT2 = matchingAxis[i2];
FloodFillRemoveMatchesFromTile(board, ref currT2, otherAxis);
}
break;
}
}
}
return(foundAnyMatches);
}
public List <Tile> VerifyMatchesOnAxis(Board board, Tile tile, Board.Axis orientation)
{
if (orientation == Board.Axis.NONE)
{
return(null);
}
if (orientation == Board.Axis.BOTH) //I see no reason to use this, but just in case
{
return(VerifyMatchesOnAxis(board, tile, Board.Axis.HORIZONTAL).Concat(VerifyMatchesOnAxis(board, tile, Board.Axis.VERTICAL)).ToList());
}
List <Tile> axisMatches = new List <Tile>();
int index;
int sourceTileIndex = 0;
int axisLenght = 0;
switch (orientation)
{
case Board.Axis.HORIZONTAL:
sourceTileIndex = tile.gridPos.x;
axisLenght = board.Width;
break;
case Board.Axis.VERTICAL:
sourceTileIndex = tile.gridPos.y;
axisLenght = board.Height;
break;
}
index = sourceTileIndex;
while (index - 1 >= 0)
{
Tile tileToCheck = null;
switch (orientation)
{
case Board.Axis.HORIZONTAL: tileToCheck = board.Tiles[index - 1][tile.gridPos.y]; break;
case Board.Axis.VERTICAL: tileToCheck = board.Tiles[tile.gridPos.x][index - 1]; break;
}
if (tile.id != tileToCheck.id)
{
break;
}
axisMatches.Add(tileToCheck);
index--;
}
index = sourceTileIndex;
while (index + 1 < axisLenght)
{
Tile tileToCheck = null;
switch (orientation)
{
case Board.Axis.HORIZONTAL: tileToCheck = board.Tiles[index + 1][tile.gridPos.y]; break;
case Board.Axis.VERTICAL: tileToCheck = board.Tiles[tile.gridPos.x][index + 1]; break;
}
if (tile.id != tileToCheck.id)
{
break;
}
axisMatches.Add(tileToCheck);
index++;
}
return(axisMatches);
}
List <Tile> FloodFillMatchesInternal(Board board, Tile tile, ref List <Tile> visited, Board.Axis axis)
{
List <Tile> matches = new List <Tile>();
visited.Add(tile);
if (axis == Board.Axis.VERTICAL || axis == Board.Axis.BOTH)
{
List <Tile> verticalMatches = VerifyMatchesOnAxis(board, tile, Board.Axis.VERTICAL);
if (verticalMatches.Count >= 2)
{
foreach (Tile t in verticalMatches)
{
if (!visited.Contains(t))
{
matches.AddRange(FloodFillMatchesInternal(board, t, ref visited, Board.Axis.HORIZONTAL));
}
if (!matches.Contains(t))
{
matches.Add(t);
}
}
}
}
if (axis == Board.Axis.HORIZONTAL || axis == Board.Axis.BOTH)
{
List <Tile> horizontalMatches = VerifyMatchesOnAxis(board, tile, Board.Axis.HORIZONTAL);
if (horizontalMatches.Count >= 2)
{
foreach (Tile t in horizontalMatches)
{
if (!visited.Contains(t))
{
matches.AddRange(FloodFillMatchesInternal(board, t, ref visited, Board.Axis.VERTICAL));
}
if (!matches.Contains(t))
{
matches.Add(t);
}
}
}
}
return(matches);
}