public void SolvePuzzle()
{
// SETUP
List <GameObject> tempPieces = new List <GameObject>(pieces);
//sort list by length (col length)
tempPieces.Sort(SortByLength);
int[] rowNums = new int[tempPieces.Count];
int[] colNums = new int[tempPieces.Count];
//add each possible orientation (flips)
List <int[, ]>[] l = new List <int[, ]> [tempPieces.Count];
List <int>[] offset = new List <int> [tempPieces.Count];
for (int i = 0; i < tempPieces.Count; i++)
{
Piece p = tempPieces[i].GetComponent <Piece>();
l[i] = new List <int[, ]>();
offset[i] = new List <int>();
rowNums[i] = p.rows;
colNums[i] = p.columns;
int[,] rep = p.GetArrayRepresentation();
l[i].Add(rep);
offset[i].Add(FindOffset(rep, p.rows, p.columns));
int[,] tempRep = FlipX(rep, p.rows, p.columns);
if (!AlreadyExists(l[i], tempRep, p.rows, p.columns))
{
l[i].Add(tempRep);
offset[i].Add(FindOffset(tempRep, p.rows, p.columns));
}
tempRep = FlipY(rep, p.rows, p.columns);
if (!AlreadyExists(l[i], tempRep, p.rows, p.columns))
{
l[i].Add(tempRep);
offset[i].Add(FindOffset(tempRep, p.rows, p.columns));
}
tempRep = FlipX(FlipY(rep, p.rows, p.columns), p.rows, p.columns);
if (!AlreadyExists(l[i], tempRep, p.rows, p.columns))
{
l[i].Add(tempRep);
offset[i].Add(FindOffset(tempRep, p.rows, p.columns));
}
}
//have array keep track of which iteration of each piece is being used and the location
int[] whichFlip = new int[l.Length];
int[] placedX = new int[l.Length];
int[] placedY = new int[l.Length];
for (int i = 0; i < l.Length; i++)
{
placedX[i] = -2;
placedY[i] = 0;
}
int[,] gi = gb.GetIntArr();
// END SETUP
// ALGORITHM
//loop goes through the pieces
int a = 0;
bool stop = false;
while (a < l.Length && !stop)
{
bool placed = false;
//l[k][whichFlip[k]];
//loop that goes through each iteration of piece
int b = whichFlip[a];
while (b < l[a].Count && !placed)
{
//loop that tries to place the piece
//for each tile in grid, attempt to place piece
int d = placedX[a] + 2;
int c = placedY[a];
while (c < gb.rows && !placed)
{
while (d < gb.columns && !placed)
{
if (gi[d, c] == 0)
{
bool canPlace = true;
for (int i = offset[a][b]; i < rowNums[a] && canPlace; i++)
{
for (int j = 0; j < colNums[a] && canPlace; j++)
{
if (l[a][b][j, i] > 0)
{
if (gb.rows - 1 < c + i - offset[a][b] || gb.columns - 1 < d + j)
{
canPlace = false;
}
else if (gi[d + j, c + i - offset[a][b]] != 0)
{
canPlace = false;
}
}
}
}
for (int i = offset[a][b] - 1; i >= 0 && canPlace; i--)
{
for (int j = 0; j < colNums[a] && canPlace; j++)
{
if (l[a][b][j, i] > 0)
{
if ((0 > c + i - offset[a][b] || gb.columns - 1 < d + j))
{
canPlace = false;
}
else if (gi[d + j, c + i - offset[a][b]] != 0)
{
canPlace = false;
}
}
}
}
if (canPlace)
{
placed = true;
placedX[a] = d;
placedY[a] = c;
whichFlip[a] = b;
for (int i = offset[a][b]; i < rowNums[a] && canPlace; i++)
{
for (int j = 0; j < colNums[a]; j++)
{
if (l[a][b][j, i] > 0)
{
int tempNum = tempPieces[a].GetComponent <Piece>().pieceNum;
gi[d + j, c + i - offset[a][b]] = tempNum;
gb.grid[d + j, c + i - offset[a][b]].GetComponent <Tile>().pieceNum = tempNum;
gb.grid[d + j, c + i - offset[a][b]].GetComponent <SpriteRenderer>().color = tempPieces[a].GetComponent <Piece>().pieceColor;
}
}
}
for (int i = offset[a][b] - 1; i >= 0 && canPlace; i--)
{
for (int j = 0; j < colNums[a] && canPlace; j++)
{
if (l[a][b][j, i] > 0)
{
int tempNum = tempPieces[a].GetComponent <Piece>().pieceNum;
gi[d + j, c + i - offset[a][b]] = tempNum;
gb.grid[d + j, c + i - offset[a][b]].GetComponent <Tile>().pieceNum = tempNum;
gb.grid[d + j, c + i - offset[a][b]].GetComponent <SpriteRenderer>().color = tempPieces[a].GetComponent <Piece>().pieceColor;
}
}
}
}
}
d += 2;
}
c++;
if (c % 2 == 0)
{
d = 0;
}
else
{
d = 1;
}
if (!placed)
{
placedX[a] = -2;
placedY[a] = 0;
}
}
b++;
}
if (placed)
{
a++;
}
else if (a > 0)
{
whichFlip[a] = 0;
placedX[a] = -2;
placedY[a] = 0;
a--;
//unplaces a piece, looks for any tile with the piece number through the entire grid
for (int i = 0; i < gb.rows; i++)
{
for (int j = 0; j < gb.columns; j++)
{
Tile t = gb.grid[j, i].GetComponent <Tile>();
if (t.pieceNum == tempPieces[a].GetComponent <Piece>().pieceNum)
{
t.pieceNum = 0;
gb.grid[j, i].GetComponent <SpriteRenderer>().color = Color.white;
gi[j, i] = 0;
}
}
}
}
else
{
stop = true;
}
}
}