bool CheckForEnclosed(Point p)
{
bool _ret = false;
Point left = p;
Point right = p;
bool rightWall = false;
bool leftWall = false;
bool falling = false;
//if (this.CurrentBoard.Get(p) == '~')
//return true;
while (!leftWall && left.X > this.CurrentBoard.GetMinX() && !falling)
{
leftWall = (this.CurrentBoard.Get(left) == '#');
if (!(p.Down().Y > this.CurrentBoard.GetMaxY() - 1))
{
falling = (this.CurrentBoard.Get(left.Down()) == '.');
}
left = left.Left();
}
while (!rightWall && right.X < this.CurrentBoard.GetMaxX() && !falling)
{
rightWall = (this.CurrentBoard.Get(right) == '#');
if (!(p.Down().Y > this.CurrentBoard.GetMaxY() - 1))
{
falling = (this.CurrentBoard.Get(right.Down()) == '.');
}
right = right.Right();
}
if (rightWall && leftWall)
{
_ret = true;
}
return(_ret);
}
void DoWork(ref BackgroundWorker bg)
{
// If there are no more cursors, we should be done.
if (Cursors.Count < 1)
{
this.complete = true;
return;
}
List <Point> newCursors = new List <Point>();
foreach (Point p in Cursors)
{
Point down = p.Down();
Point up = p.Up();
Point left = p.Left();
Point right = p.Right();
bool enclosed = CheckForEnclosed(p);
bool skip = false;
// If the cursor has fallen below MaxY, drop that cursor path
if (down.Y > this.CurrentBoard.GetMaxY() - 1)
{
this.CurrentBoard.Set(p, '|');
skip = true;
}
// If there's already water here
else if (this.CurrentBoard.Get(down) == '|')
{
this.CurrentBoard.Set(p, '|');
skip = true;
}
// If it's falling through sand unobstructed
else if (this.CurrentBoard.Get(down) == '.')
{
this.CurrentBoard.Set(p, '|');
if (!newCursors.Contains(down) && !Cursors.Contains(down))
{
newCursors.Add(down);
}
}
// It hits clay
else if ((this.CurrentBoard.Get(down) == '#' || this.CurrentBoard.Get(down).IsWet()))
{
this.CurrentBoard.Set(p, '~');
while ((this.CurrentBoard.Get(left.Down()) == '#' || this.CurrentBoard.Get(left.Down()).IsWet()) && this.CurrentBoard.Get(left) != '#')
{
this.CurrentBoard.Set(left, '~');
if (this.CurrentBoard.Get(left.Left()) == '.' || this.CurrentBoard.Get(left.Left()) == '|')
{
left = left.Left();
}
else
{
break;
}
}
while ((this.CurrentBoard.Get(right.Down()) == '#' || this.CurrentBoard.Get(right.Down()).IsWet()) && this.CurrentBoard.Get(right) != '#')
{
this.CurrentBoard.Set(right, '~');
if (this.CurrentBoard.Get(right.Right()) == '.' || this.CurrentBoard.Get(right.Right()) == '|')
{
right = right.Right();
}
else
{
break;
}
}
if (this.CurrentBoard.Get(right.Down()) == '.')
{
Point tmpLeft = right.Left();
this.CurrentBoard.Set(p, '|');
if (!newCursors.Contains(right))
{
newCursors.Add(right);
}
while (this.CurrentBoard.Get(tmpLeft).IsWet())
{
this.CurrentBoard.Set(tmpLeft, '|');
tmpLeft = tmpLeft.Left();
}
}
if (this.CurrentBoard.Get(left.Down()) == '.')
{
Point tmpRight = left.Right();
this.CurrentBoard.Set(p, '|');
if (!newCursors.Contains(left))
{
newCursors.Add(left);
}
while (this.CurrentBoard.Get(tmpRight).IsWet())
{
this.CurrentBoard.Set(tmpRight, '|');
tmpRight = tmpRight.Right();
}
}
if (enclosed && !skip)
{
if (!newCursors.Contains(up))
{
newCursors.Add(up);
}
}
}
}
Cursors.Clear();
Cursors = new List <Point>(newCursors);
if (Cursors.Count() > 0)
{
CurrentLine = Cursors.OrderByDescending(o => o.Y).First().Y;
}
if (Visualization)
{
SetupBoardVisual();
//Thread.Sleep(1);
}
}