示例#1
0
    public void UpdateDotSelection(Dot dot, List <Dot> currentDotPath)
    {
        if (currentDotPath.Count == 0)
        {
            // highlight a new dot
            dot.Activate();
            currentDotPath.Add(dot);
        }
        else
        {
            // highlight a new dot on the path if the dot is selectable according to the game rules
            Dot lastDot  = currentDotPath[currentDotPath.Count - 1];
            int lastDotX = lastDot.Column;
            int lastDotY = lastDot.Row;
            int newDotX  = dot.Column;
            int newDotY  = dot.Row;
            if (
                lastDot != dot &&                                   // not same as last dot
                lastDot.DotType == dot.DotType &&                   // same type of dot
                !currentDotPath.Contains(dot) &&                    // not already in current path
                Mathf.Abs(newDotX - lastDotX) <= 1 &&               // only one step away on the board horizontally
                Mathf.Abs(newDotY - lastDotY) <= 1 &&               // only one step away on the board vertically
                (newDotX == lastDotX || newDotY == lastDotY)        // only horizontal/vertical dot connections are allowed
                )
            {
                dot.Activate();
                currentDotPath.Add(dot);
            }
        }

        // display the path as connected lines
        currentPathDisplay.positionCount = currentDotPath.Count;
        currentPathDisplay.enabled       = currentPathDisplay.positionCount > 0;
        currentPathDisplay.SetPositions(currentDotPath.Select(d => d.transform.position).ToArray());
    }