/// <summary>
/// Determines the coordinates in a desired direction
/// </summary>
/// <param name="coord"></param>
/// <param name="direction"></param>
/// <returns></returns>
public static ICoordinates NextCoordinates(ICoordinates coordinates, Direction direction)
{
if (coordinates is BoardCoordinates)
{
BoardCoordinates board = new BoardCoordinates(coordinates);
board.Modify(direction);
if (board.Valid)
{
return(board);
}
else
{
return(new OuterRingCoordinates(board));
}
}
else if (coordinates is OuterRingCoordinates)
{
if (direction != Direction.Clockwise && direction != Direction.Counterclockwise)
{
direction = ConvertDirection(coordinates as OuterRingCoordinates, direction);
}
ICoordinates outer = new OuterRingCoordinates(coordinates);
outer.Modify(direction);
return(outer);
}
return(null);
}
public override bool Equals(object obj)
{
if (obj is OuterRingCoordinates)
{
OuterRingCoordinates other = obj as OuterRingCoordinates;
return(other.Position == Position);
}
return(false);
}
/// <summary>
/// Converts the pushing direction into a direction of outer ring movement
/// </summary>
/// <param name="coord">the coordinates a marble got pushed out to</param>
/// <param name="direction">the direction the push was done</param>
/// <returns></returns>
public static Direction ConvertDirection(OuterRingCoordinates coordinates, Direction direction)
{
if (direction == Direction.Clockwise || direction == Direction.Counterclockwise)
{
return(direction);
}
Direction clw = Direction.None, ccw = Direction.None;
if (coordinates.Position < 6)
{
clw = Direction.UpRight; //2
ccw = Direction.DownLeft; //5
}
else if (coordinates.Position < 11)
{
clw = Direction.UpLeft; //1
ccw = Direction.DownRight; //4
}
else if (coordinates.Position < 16)
{
clw = Direction.Left; //6
ccw = Direction.Right; //3
}
else if (coordinates.Position < 21)
{
clw = Direction.DownLeft; //5
ccw = Direction.UpRight; //2
}
else if (coordinates.Position < 26)
{
clw = Direction.DownRight; //4
ccw = Direction.UpLeft; //1
}
else
{
clw = Direction.Right; //3
ccw = Direction.Left; //6
}
int clwCount = 0, ccwCount = 0;
Direction mod = direction;
while (mod != clw)
{
clwCount++;
if ((byte)mod + 1 == 7)
{
mod = (Direction)1;
}
else
{
mod = mod + 1;
}
}
mod = direction;
while (mod != ccw)
{
ccwCount++;
if ((byte)mod - 1 == 0)
{
mod = (Direction)6;
}
else
{
mod = mod - 1;
}
}
if (clwCount < ccwCount)
{
return(Direction.Clockwise);
}
return(Direction.Counterclockwise);
}