public Cart(int x, int y, CartDirection direction)
{
this.X = x;
this.Y = y;
this.Direction = direction;
this.LatestTurn = CartTurn.Right;
}
private void CartIntersectionTest(
CartDirection initialDirection,
CartDirection newDirection,
int iteration)
{
int dx = 0;
int dy = 0;
switch (newDirection)
{
case CartDirection.West:
dx = -1;
break;
case CartDirection.East:
dx = 1;
break;
case CartDirection.North:
dy = -1;
break;
case CartDirection.South:
dy = 1;
break;
}
for (int i = 0; i < 3; ++i)
{
var c = new CartState(2, 2, initialDirection, iteration + (i * 3)).Move(TrackCell.Intersection);
Assert.AreEqual(2 + dx, c.X, $"X ({i})");
Assert.AreEqual(2 + dy, c.Y, $"Y ({i})");
Assert.AreEqual(newDirection, c.Direction, $"Direction ({i})");
Assert.AreEqual(iteration + (i * 3) + 1, c.IntersectionsEncountered, "IntersectionsEncountered");
}
}
public Cart(int _x, int _y, CartDirection _dir)
{
x = _x;
y = _y;
dir = _dir;
lastTurn = CartDirection.Right;
}
public Cart(int positionX, int positionY, CartDirection direction)
{
PositionX = positionX;
PositionY = positionY;
Direction = direction;
LastDirection = direction;
Id = _idCounter;
_idCounter++;
}
public CartState(
int x,
int y,
CartDirection direction,
int intersectionsEncountered)
{
X = x;
Y = y;
Direction = direction;
IntersectionsEncountered = intersectionsEncountered;
}
public Cart(Coord coordinates, Track owner, CartDirection direction) : this(coordinates, owner)
{
CurrentDirection = direction;
}
public CartState Move(TrackCell track)
{
int x = X;
int y = Y;
int i = IntersectionsEncountered;
CartDirection d = Direction;
switch (track)
{
case TrackCell.NorthSouth:
switch (Direction)
{
case CartDirection.North:
case CartDirection.South:
break;
default:
throw new InvalidOperationException("On N/S track and attempted to move " + Direction);
}
break;
case TrackCell.EastWest:
switch (Direction)
{
case CartDirection.East:
case CartDirection.West:
break;
default:
throw new InvalidOperationException("On E/W track and attempted to move " + Direction);
}
break;
case TrackCell.NorthEastSouthWest:
switch (d)
{
case CartDirection.North: d = CartDirection.East; break;
case CartDirection.South: d = CartDirection.West; break;
case CartDirection.East: d = CartDirection.North; break;
case CartDirection.West: d = CartDirection.South; break;
}
break;
case TrackCell.NorthWestSouthEast:
switch (d)
{
case CartDirection.North: d = CartDirection.West; break;
case CartDirection.South: d = CartDirection.East; break;
case CartDirection.East: d = CartDirection.South; break;
case CartDirection.West: d = CartDirection.North; break;
}
break;
case TrackCell.Intersection:
i += 1;
int turnDelta = (IntersectionsEncountered % 3) - 1;
d = (CartDirection)(((int)d + turnDelta + 4) % 4);
break;
default:
throw new ArgumentOutOfRangeException(nameof(track), "Unrecognized track direction " + track);
}
int dx = 0;
int dy = 0;
switch (d)
{
case CartDirection.North: dy = -1; break;
case CartDirection.South: dy = 1; break;
case CartDirection.West: dx = -1; break;
case CartDirection.East: dx = 1; break;
}
return(new CartState(
X + dx,
Y + dy,
d,
i));
}
public void Move(char[,] tracks)
{
var track = tracks[X, Y];
if (track == '|')
{
if (_currentDirection == CartDirection.UP)
{
Y -= 1;
}
else if (_currentDirection == CartDirection.DOWN)
{
Y += 1;
}
else
{
throw new ArgumentOutOfRangeException();
}
}
else if (track == '-')
{
if (_currentDirection == CartDirection.LEFT)
{
X -= 1;
}
else if (_currentDirection == CartDirection.RIGHT)
{
X += 1;
}
else
{
throw new ArgumentOutOfRangeException();
}
}
else if (track == '\\')
{
if (_currentDirection == CartDirection.UP)
{
X -= 1;
_currentDirection = CartDirection.LEFT;
}
else if (_currentDirection == CartDirection.RIGHT)
{
Y += 1;
_currentDirection = CartDirection.DOWN;
}
else if (_currentDirection == CartDirection.LEFT)
{
Y -= 1;
_currentDirection = CartDirection.UP;
}
else if (_currentDirection == CartDirection.DOWN)
{
X += 1;
_currentDirection = CartDirection.RIGHT;
}
}
else if (track == '/')
{
if (_currentDirection == CartDirection.UP)
{
X += 1;
_currentDirection = CartDirection.RIGHT;
}
else if (_currentDirection == CartDirection.RIGHT)
{
Y -= 1;
_currentDirection = CartDirection.UP;
}
else if (_currentDirection == CartDirection.LEFT)
{
Y += 1;
_currentDirection = CartDirection.DOWN;
}
else if (_currentDirection == CartDirection.DOWN)
{
X -= 1;
_currentDirection = CartDirection.LEFT;
}
}
else if (track == '+')
{
if (_intersections % 3 == 0)
{
// Left
if (_currentDirection == CartDirection.UP)
{
_currentDirection = CartDirection.LEFT;
X -= 1;
}
else if (_currentDirection == CartDirection.DOWN)
{
_currentDirection = CartDirection.RIGHT;
X += 1;
}
else if (_currentDirection == CartDirection.LEFT)
{
_currentDirection = CartDirection.DOWN;
Y += 1;
}
else if (_currentDirection == CartDirection.RIGHT)
{
_currentDirection = CartDirection.UP;
Y -= 1;
}
}
else if (_intersections % 3 == 1)
{
// Straight
if (_currentDirection == CartDirection.UP)
{
Y -= 1;
}
else if (_currentDirection == CartDirection.DOWN)
{
Y += 1;
}
else if (_currentDirection == CartDirection.LEFT)
{
X -= 1;
}
else if (_currentDirection == CartDirection.RIGHT)
{
X += 1;
}
}
else if (_intersections % 3 == 2)
{
// Right
if (_currentDirection == CartDirection.UP)
{
_currentDirection = CartDirection.RIGHT;
X += 1;
}
else if (_currentDirection == CartDirection.DOWN)
{
_currentDirection = CartDirection.LEFT;
X -= 1;
}
else if (_currentDirection == CartDirection.LEFT)
{
_currentDirection = CartDirection.UP;
Y -= 1;
}
else if (_currentDirection == CartDirection.RIGHT)
{
_currentDirection = CartDirection.DOWN;
Y += 1;
}
}
_intersections += 1;
}
else
{
throw new ArgumentOutOfRangeException();
}
_moves += 1;
}
public MineCart(char cart, int x, int y)
{
X = x;
Y = y;
_currentDirection = (CartDirection)cart;
}
public void Turn(SpecialTrackPiece piece)
{
if (this.location.x == piece.location.x && this.location.y == piece.location.y)
{
if (piece.type == Types.TURN)
{
switch (piece.direction)
{
case TurnDirection.TOPLEFT:
if (this.direction == CartDirection.RIGHT)
{
this.direction = CartDirection.ABOVE;
}
else
{
this.direction = CartDirection.LEFT;
}
break;
case TurnDirection.TOPRIGHT:
if (this.direction == CartDirection.LEFT)
{
this.direction = CartDirection.ABOVE;
}
else
{
this.direction = CartDirection.RIGHT;
}
break;
case TurnDirection.BOTTOMRIGHT:
if (this.direction == CartDirection.LEFT)
{
this.direction = CartDirection.BOTTOM;
}
else
{
this.direction = CartDirection.RIGHT;
}
break;
case TurnDirection.BOTTOMLEFT:
if (this.direction == CartDirection.RIGHT)
{
this.direction = CartDirection.BOTTOM;
}
else
{
this.direction = CartDirection.LEFT;
}
break;
}
}
else if (piece.type == Types.INTERSECTION)
{
switch (this.nextTurn)
{
case TurnState.LEFT:
switch (this.direction)
{
case CartDirection.ABOVE:
this.direction = CartDirection.LEFT;
break;
case CartDirection.LEFT:
this.direction = CartDirection.BOTTOM;
break;
case CartDirection.RIGHT:
this.direction = CartDirection.ABOVE;
break;
case CartDirection.BOTTOM:
this.direction = CartDirection.RIGHT;
break;
}
this.nextTurn = TurnState.STRAIGHT;
break;
case TurnState.STRAIGHT:
this.nextTurn = TurnState.RIGHT;
break;
case TurnState.RIGHT:
switch (this.direction)
{
case CartDirection.ABOVE:
this.direction = CartDirection.RIGHT;
break;
case CartDirection.LEFT:
this.direction = CartDirection.ABOVE;
break;
case CartDirection.RIGHT:
this.direction = CartDirection.BOTTOM;
break;
case CartDirection.BOTTOM:
this.direction = CartDirection.LEFT;
break;
}
this.nextTurn = TurnState.LEFT;
break;
}
}
}
}
public Cart(Point location, CartDirection direction)
{
this.location = location;
this.direction = direction;
this.nextTurn = TurnState.LEFT;
}
