private void Setup(string pageData)
{
var res = Regex.Match(pageData, Pattern);
if (res.Groups.Count != 4)
{
throw new Exception("Invalid board.");
}
BoardX = int.Parse(res.Groups[1].Value);
BoardY = int.Parse(res.Groups[2].Value);
BoardString = res.Groups[3].Value;
Rows = BoardUtils.MakeRows(BoardString);
Cols = BoardUtils.MakeRows(BoardUtils.Transpose(BoardString));
}
//Undoes ball position.
public void ClearBallPosition()
{
if (BallPosition == null)
{
throw new Exception("was asked to remove ball when ballposition is null!");
}
//how to convert something like -4,3,0,-3, => -4,3,-4
//todo isn't this already taken care of by "move"...?
BoardUtils.RemoveZeroAtSectionFromList(Rows[BallPosition.Y], BallXSection);
BoardUtils.RemoveZeroAtSectionFromList(Cols[BallPosition.X], BallYSection);
//we've already adjusted the row & cols.
BallPosition = null;
}
public void InitialBallPlacement(int x, int y)
{
if (BallPosition != null)
{
throw new Exception("Ballposition must be null");
}
var pos = new BallPosition
{
X = x,
Y = y
};
//figure out the ballXsection.
BoardUtils.AddZeroAtPositionInList(x, Rows[y], out var xs);
BallXSection = xs;
BoardUtils.AddZeroAtPositionInList(y, Cols[x], out var ys);
BallYSection = ys;
BallPosition = pos;
}
public void Move(Direction d)
{
ValidateMove(d);
int xs = 0;
int ys = 0;
int sectionMoved;
int xd = 0;
int yd = 0;
int moved;
int pushsize; //if you push a bunch of boxes to the next call, how many is it?
//zero means you hit a 1.
switch (d)
{
//move in the row/col matching the direction of movement.
//remove the zero from the opposite list starting point
//calculate bump from opposite
//if push size > 0 also add that to the opposite.
//so much work!
case Direction.D:
//fix cur
BoardUtils.MoveInArray(Cols[BallPosition.X], BallYSection, out sectionMoved, out moved,
out pushsize);
yd = moved;
ys = BallYSection + sectionMoved;
//fix opp source
BoardUtils.RemoveZeroAtSectionFromList(Rows[BallPosition.Y], BallXSection);
//fix hit source, also adjusts xs
BumpIntoArrayAtPosition(Rows[BallPosition.Y + yd], BallPosition.X, out xs);
//adjust push. no need to mess with xs or ys.
BoardUtils.AddPushToListAt(Rows[BallPosition.Y + yd + 1], BallPosition.X, pushsize);
break;
case Direction.U: //this requires some careful reversing.
var revsec = Cols[BallPosition.X].Count - BallYSection - 1;
var beforeLen = Cols[BallPosition.X].Count;
//reverse this column, then move in it.
Cols[BallPosition.X] = Cols[BallPosition.X].ToArray().Reverse().ToList();
BoardUtils.MoveInArray(Cols[BallPosition.X], revsec, out sectionMoved, out moved,
out pushsize);
//now reverse it again.
Cols[BallPosition.X] = Cols[BallPosition.X].ToArray().Reverse().ToList();
yd = -1 * moved;
//in reverse mode then shrinking/expanding the list is equivalent to changing sections!
sectionMoved += beforeLen - Cols[BallPosition.X].Count;
ys = BallYSection - sectionMoved;
//the naive way to determine sectionmoved doesn't work when reversing.
//instead look at
//fix opp source
BoardUtils.RemoveZeroAtSectionFromList(Rows[BallPosition.Y], BallXSection);
//fix hit source, also adjusts xs
BumpIntoArrayAtPosition(Rows[BallPosition.Y + yd], BallPosition.X, out xs);
//adjust push. no need to mess with xs or ys.
BoardUtils.AddPushToListAt(Rows[BallPosition.Y + yd - 1], BallPosition.X, pushsize);
break;
case Direction.R:
BoardUtils.MoveInArray(Rows[BallPosition.Y], BallXSection, out sectionMoved, out moved,
out pushsize);
xd = moved;
xs = BallXSection + sectionMoved;
BoardUtils.RemoveZeroAtSectionFromList(Cols[BallPosition.X], BallYSection);
BumpIntoArrayAtPosition(Cols[BallPosition.X + xd], BallPosition.Y, out ys);
BoardUtils.AddPushToListAt(Cols[BallPosition.X + xd + 1], BallPosition.Y, pushsize);
break;
case Direction.L:
var revsec2 = Rows[BallPosition.Y].Count - BallXSection - 1;
var beforeLen2 = Rows[BallPosition.Y].Count;
Rows[BallPosition.Y] = Rows[BallPosition.Y].ToArray().Reverse().ToList();
BoardUtils.MoveInArray(Rows[BallPosition.Y], revsec2, out sectionMoved, out moved,
out pushsize);
Rows[BallPosition.Y] = Rows[BallPosition.Y].ToArray().Reverse().ToList();
xd = -1 * moved;
sectionMoved += beforeLen2 - Rows[BallPosition.Y].Count;
xs = BallXSection - sectionMoved;
//fix opp source
BoardUtils.RemoveZeroAtSectionFromList(Cols[BallPosition.X], BallYSection);
//fix hit source, also adjusts xs
BumpIntoArrayAtPosition(Cols[BallPosition.X + xd], BallPosition.Y, out ys);
//adjust push. no need to mess with xs or ys.
BoardUtils.AddPushToListAt(Cols[BallPosition.X + xd - 1], BallPosition.Y, pushsize);
break;
default:
throw new ArgumentOutOfRangeException(nameof(d), d, null);
}
//I also have to adjust the position and xsection shit.
BallXSection = xs;
BallYSection = ys;
MoveBallTo(BallPosition.X + xd, BallPosition.Y + yd);
}