//Exchange the positions of two sweets.
private void ExchangeSweets(SweetsController sweet1, SweetsController sweet2)
{
if (sweet1.Movable() && sweet2.Movable())
{
sweets[sweet1.X, sweet1.Y] = sweet2;
sweets[sweet2.X, sweet2.Y] = sweet1;
if (MatchSweets(sweet1, sweet2.X, sweet2.Y) != null || MatchSweets(sweet2, sweet1.X, sweet1.Y) != null ||
sweet1.Type == SweetsType.RAINBOW_CANDY || sweet2.Type == SweetsType.RAINBOW_CANDY)
{
int tempX = sweet1.X, tempY = sweet1.Y;
sweet1.MovedComponent.Move(sweet2.X, sweet2.Y, fillTime);
sweet2.MovedComponent.Move(tempX, tempY, fillTime);
if (sweet1.Type == SweetsType.RAINBOW_CANDY && sweet1.ColorAble() && sweet2.ColorAble())
{
EliminateAnySweets clearColor = sweet1.GetComponent <EliminateAnySweets>();
if (clearColor != null)
{
clearColor.ClearColor = sweet2.ColoredComponent.ThisType;
}
EliminateSweet(sweet1.X, sweet1.Y);
}
if (sweet2.Type == SweetsType.RAINBOW_CANDY && sweet1.ColorAble() && sweet2.ColorAble())
{
EliminateAnySweets clearColor = sweet2.GetComponent <EliminateAnySweets>();
if (clearColor != null)
{
clearColor.ClearColor = sweet1.ColoredComponent.ThisType;
}
EliminateSweet(sweet2.X, sweet2.Y);
}
EliminateAllMatchedSweets();
StartCoroutine(FillAll());
}
else
{
sweets[sweet1.X, sweet1.Y] = sweet1;
sweets[sweet2.X, sweet2.Y] = sweet2;
}
}
}
//Fill the grids one by one.
public bool Fill()
{
bool filledNotFinished = false;
//From bottom to top.
for (int y = rows - 2; y >= 0; y--)
{
for (int x = 0; x < columns; x++)
{
SweetsController sweet = sweets[x, y];
if (sweet.Movable()) //无法移动则无法向下填充(垂直填充).
{
SweetsController sweetBelow = sweets[x, y + 1]; //得到当前位置下方的实体.
if (sweetBelow.Type == SweetsType.EMPTY) //下方当前为空物体，允许垂直填充.
{
Destroy(sweetBelow.gameObject);
sweet.MovedComponent.Move(x, y + 1, fillTime);
sweets[x, y + 1] = sweet;
CreateNewSweet(x, y, SweetsType.EMPTY);
filledNotFinished = true;
}
else //向左右偏移填充
{
for (int d = -1; d <= 1; d++)
{
if (d != 0) //排除正下方.
{
int down = x + d;
if (down >= 0 && down < columns)
{
SweetsController downSweet = sweets[down, y + 1];
if (downSweet.Type == SweetsType.EMPTY)
{
bool vertical_fillable = true; //用于判断垂直填充是否能满足向下填充.
for (int above = y; above >= 0; above--)
{
SweetsController aboveSweet = sweets[down, above];
if (aboveSweet.Movable())
{
//左下方空白的正上方有可向下填充的物体，则不用向侧下填充.
break;
}
else if (!aboveSweet.Movable() && aboveSweet.Type != SweetsType.EMPTY)
{
vertical_fillable = false;
break;
}
}
if (!vertical_fillable)
{
Destroy(downSweet.gameObject);
sweet.MovedComponent.Move(down, y + 1, fillTime);
sweets[down, y + 1] = sweet;
CreateNewSweet(x, y, SweetsType.EMPTY);
filledNotFinished = true;
break;
}
}
}
}
}
}
}
}
}
//Exceptional case: the top row
for (int x = 0; x < columns; x++)
{
SweetsController sweet = sweets[x, 0];
if (sweet.Type == SweetsType.EMPTY)
{
GameObject newSweet =
Instantiate(sweetsPrefabDic[SweetsType.NORMAL], CalibratePosition(x, -1), Quaternion.identity);
newSweet.transform.parent = transform;
sweets[x, 0] = newSweet.GetComponent <SweetsController>();
sweets[x, 0].Init(x, -1, this, SweetsType.NORMAL);
sweets[x, 0].MovedComponent.Move(x, 0, fillTime);
sweets[x, 0].ColoredComponent.SetThisType( //随机生成一种类型的甜品 **枚举为特殊的int**
(SweetsColorType.ColorType)Random.Range(0, sweets[x, 0].ColoredComponent.MaxColorsNum));
filledNotFinished = true;
}
}
//Filling finished or not.
return(filledNotFinished);
}