IEnumerator fillBoard()
{
// Move the board off screen so dropGel works properly
GameObject[] gels = GameObject.FindGameObjectsWithTag("Gel");
foreach (GameObject go in gels)
{
go.transform.Translate(0, -offY, 0);
}
// Fill the board like normal
for (int y = 0; y < GelRows; y++)
{
for (int x = 0; x < GelColumns; x++)
{
gel g = getGel(x, y, -offY);
if (g == null)
{
dropGel(x, y); //TODO: Pick evaluates -offY, so it doesn't work right. Find alternative.
}
}
}
// Move the original board back
foreach (GameObject go in gels)
{
go.transform.Translate(0, offY, 0);
}
yield return(new WaitForSeconds(TweenFallDuration));
}
bool hasMatchOnPath(gel g, Vector2 pos, Vector2 dir, int limit)
{
float dist = limit * gelStep;
RaycastHit2D[] hits = Physics2D.RaycastAll(pos, dir, dist);
// Shortcut - impossible to have match 3 with fewer hits (probably went off the board)
if (hits.Length < 3)
{
return(false);
}
int count = 0;
for (int i = 0; i < hits.Length; i++)
{
if (hits[i].collider.gameObject.name == g.gameObject.name)
{
count++;
}
else
{
count = 0;
}
if (count == 3)
{
return(true);
}
}
return(false);
}
gel[,] getKernel(int x, int y)
{
gel[,] kernel = new gel[5, 5];
gel center = getGel(x, y);
if (center == null)
{
return(null);
}
int j = 0, k = 0;
for (int v = y - 2; v <= y + 2; v++)
{
k = 0;
for (int u = x - 2; u <= x + 2; u++)
{
// Calling getGel is a bit inefficient, but gets the job done
gel g = getGel(u, v);
if (g != null)
{
kernel[j, k] = g;
}
k++;
}
j++;
}
return(kernel);
}
void doSwipe()
{
// Raycast will hit self, so temporarily turn off gel's collider
Collider2D c = touchGel.GetComponent <Collider2D>();
c.enabled = false;
RaycastHit2D hit = Physics2D.Raycast(touchGel.transform.position, swipeDir);
c.enabled = true;
if (hit)
{
touchPartner = hit.collider.transform.GetComponent <gel>();
Vector2 touchGelOld = new Vector2(touchGel.transform.position.x, touchGel.transform.position.y);
Vector2 touchPartnerOld = new Vector2(touchPartner.transform.position.x, touchPartner.transform.position.y);
touchGel.transform.DOMove(hit.collider.transform.position, TweenSwapDuration);
touchPartner.transform.DOMove(touchGel.transform.position, TweenSwapDuration)
.OnComplete(() =>
{
if (isGoodSwap(touchGel, touchPartner) == false)
{
touchGel.transform.DOMove(touchGelOld, TweenSwapDuration);
touchPartner.transform.DOMove(touchPartnerOld, TweenSwapDuration);
}
else
{
StartCoroutine(doBoard());
}
});
}
}
void drawBoard()
{
calculateExtents();
for (int y = 0; y < GelRows; y++)
{
for (int x = 0; x < GelColumns; x++)
{
gel g = dropGel(x, y);
}
}
}
bool gelCompare(gel a, gel b)
{
if (a == null || b == null)
{
return(false);
}
if (a.name != b.name)
{
return(false);
}
return(true);
}
/**
* Swaps center element with element at targetX/Y.
* Returns false if target is null
**/
bool tryKernelSwap(gel[,] kernel, int targetX, int targetY)
{
gel target = kernel[targetY, targetX];
if (target == null)
{
return(false);
}
kernel[targetY, targetX] = kernel[1, 1];
kernel[1, 1] = target;
return(true);
}
void doTouchBegin(Vector2 pos)
{
Vector3 wp = Camera.main.ScreenToWorldPoint(pos);
Vector2 touchPos = new Vector2(wp.x, wp.y);
Collider2D hit = Physics2D.OverlapPoint(touchPos);
if (hit)
{
touchGel = hit.transform.GetComponent <gel>();
touchStart = touchPos;
touchTracking = true;
}
}
void processMatches()
{
for (int y = 0; y < GelRows; y++)
{
for (int x = 0; x < GelColumns; x++)
{
gel g = getGel(x, y);
if (g != null && g.IsMatched)
{
g.Pop();
}
}
}
}
gel dropGel(int x, int y)
{
float u, v;
u = gelZeroX + (x * (Padding + GelScale));
v = gelZeroY + (y * (Padding + GelScale)) - offY;
gel g = Instantiate(pick(u, v), new Vector3(u, v, 0), Quaternion.identity).GetComponent <gel>();
g.transform.DOMoveY(v + offY, TweenFallDuration)
.SetEase(Ease.InOutQuad)
.SetDelay(Random.Range(0, TweenRndColumn) + (y * TweenRndRow))
.OnComplete(() => { g.IsTouchable = true; });
return(g);
}
bool stillHasSwaps()
{
gel candidate1 = null, candidate2 = null;
for (int y = 0; y < GelRows; y++)
{
for (int x = 0; x < GelColumns; x++)
{
gel[,] kernel = getKernel(x, y);
if (kernel != null)
{
// Try to swap East
if (tryKernelSwap(kernel, 2, 1))
{
if (kernalHasMatch(kernel))
{
candidate1 = kernel[1, 1];
candidate2 = kernel[1, 2];
}
// Swap back
tryKernelSwap(kernel, 2, 1);
}
// Try to swap North
if (tryKernelSwap(kernel, 1, 2))
{
if (kernalHasMatch(kernel))
{
candidate1 = kernel[1, 1];
candidate2 = kernel[2, 1];
}
}
}
}
}
if (candidate1 != null)
{
Debug.Log("Still has swaps!");
return(true);
}
else
{
Debug.Log("NO SWAPS LEFT!!!");
return(false);
}
}
bool markMatches()
{
bool hasMatches = false;
for (int y = 0; y < GelRows; y++)
{
for (int x = 0; x < GelColumns; x++)
{
gel g = getGel(x, y);
if (g)
{
hasMatches |= markMatchesOnPath(g, DIR_EAST);
hasMatches |= markMatchesOnPath(g, DIR_NORTH);
}
}
}
return(hasMatches);
}
bool isGoodSwap(gel a, gel b)
{
// 2 North, checking south
if (hasMatchOnPath(a, calcRelPos(a, DIR_NORTH, 2), DIR_SOUTH, 5))
{
return(true);
}
if (hasMatchOnPath(b, calcRelPos(b, DIR_NORTH, 2), DIR_SOUTH, 5))
{
return(true);
}
// 2 South, checking north
if (hasMatchOnPath(a, calcRelPos(a, DIR_SOUTH, 2), DIR_NORTH, 5))
{
return(true);
}
if (hasMatchOnPath(b, calcRelPos(b, DIR_SOUTH, 2), DIR_NORTH, 5))
{
return(true);
}
// 2 West, checking east
if (hasMatchOnPath(a, calcRelPos(a, DIR_WEST, 2), DIR_EAST, 5))
{
return(true);
}
if (hasMatchOnPath(b, calcRelPos(b, DIR_WEST, 2), DIR_EAST, 5))
{
return(true);
}
// 2 East, checking west
if (hasMatchOnPath(a, calcRelPos(a, DIR_EAST, 2), DIR_WEST, 5))
{
return(true);
}
if (hasMatchOnPath(b, calcRelPos(b, DIR_EAST, 2), DIR_WEST, 5))
{
return(true);
}
return(false);
}
void markMatchNeighbors()
{
for (int y = 0; y < GelRows; y++)
{
for (int x = 0; x < GelColumns; x++)
{
gel g = getGel(x, y);
if (g != null && g.IsMatched)
{
List <GameObject> neighbors = getNeighbors(g.transform.position.x, g.transform.position.y);
foreach (GameObject n in neighbors)
{
if (n.name == g.gameObject.name)
{
n.GetComponent <gel>().SetMatched();
}
}
}
}
}
}
bool markMatchesOnPath(gel g, Vector2 dir)
{
// Search two additonal gels in dir (self + 2 = 3)
float dist = 2 * gelStep;
RaycastHit2D[] hits = Physics2D.RaycastAll(g.transform.position, dir, dist);
// Shortcut - impossible to have match 3 with fewer hits (probably went off the board)
if (hits.Length < 3)
{
return(false);
}
// We know hit 0 is the parameter g, so just check hit 1 and 2
if (hits[1].transform.gameObject.name == g.gameObject.name && hits[2].transform.gameObject.name == g.gameObject.name)
{
g.SetMatched();
hits[1].transform.GetComponent <gel>().SetMatched();
hits[2].transform.GetComponent <gel>().SetMatched();
return(true);
}
return(false);
}
IEnumerator applyGravity()
{
// For each column, walk north until empty.
// Increment for each empty until non-empty found
// Set non-empty to fall south empty-count cells, calculate duration accordingly
// Keep walking north until finished
yield return(new WaitForSeconds(GravityDelay));
float maxDuration = 0;
for (int x = 0; x < GelColumns; x++)
{
int emptyCount = 0;
for (int y = 0; y < GelRows; y++)
{
gel g = getGel(x, y);
if (g == null)
{
emptyCount++;
}
else
{
float newY = g.transform.position.y - (emptyCount * gelStep);
float duration = TweenSwapDuration * emptyCount;
if (duration > maxDuration)
{
maxDuration = duration;
}
g.transform.DOMoveY(newY, duration);
}
}
}
yield return(new WaitForSeconds(maxDuration));
}
Vector2 calcRelPos(gel g, Vector2 dir, int hops)
{
return((Vector2)g.transform.position + (dir * (hops * gelStep)));
}