private MazeShape(int width, int height)
{
this.maze = new Maze(width, height);
maze.CreateMaze();
}
/// <summary>
/// A string that encodes the maze parameters.
/// This code can be used to construct an identical maze.
/// </summary>
public string Code(Maze maze)
{
long nCode = 0;
MazeDimensions dimensionsObj = MazeDimensions.Instance(codeVersion);
#region Encode the relevant parameters into a numeric code
// Items are encoded in reverse order of decoding.
// Some items must be encoded before others if decoding requires them.
if (codeVersion == 0)
{
// Encode the start and end points.
// Instead of the direct coordinates we will use the following information:
// * travel direction
// * distance from the border (instead of coordinate)
// * other coordinate
// The scaling factor is always MazeDimensions.MaxXSize, as it is greater than MazeDimensions.MaxYSize.
int d1, d2, c1, c2;
switch (maze.Direction)
{
case WallPosition.WP_E:
d1 = maze.StartSquare.XPos;
d2 = maze.XSize - 1 - maze.EndSquare.XPos;
c1 = maze.StartSquare.YPos;
c2 = maze.EndSquare.YPos;
break;
case WallPosition.WP_W:
d1 = maze.EndSquare.XPos;
d2 = maze.XSize - 1 - maze.StartSquare.XPos;
c1 = maze.EndSquare.YPos;
c2 = maze.StartSquare.YPos;
break;
case WallPosition.WP_S:
d1 = maze.StartSquare.YPos;
d2 = maze.YSize - 1 - maze.EndSquare.YPos;
c1 = maze.StartSquare.XPos;
c2 = maze.EndSquare.XPos;
break;
case WallPosition.WP_N:
d1 = maze.EndSquare.YPos;
d2 = maze.YSize - 1 - maze.StartSquare.YPos;
c1 = maze.EndSquare.XPos;
c2 = maze.StartSquare.XPos;
break;
default:
d1 = d2 = c1 = c2 = -1;
break;
}
nCode *= (dimensionsObj.MaxBorderDistance + 1);
nCode += d1;
nCode *= (dimensionsObj.MaxBorderDistance + 1);
nCode += d2;
nCode *= (dimensionsObj.MaxXSize + 1);
nCode += c1;
nCode *= (dimensionsObj.MaxXSize + 1);
nCode += c2;
nCode *= (int)WallPosition.WP_NUM;
nCode += (int)maze.Direction;
}
// Encode maze dimension.
nCode *= (dimensionsObj.MaxYSize - dimensionsObj.MinSize + 1);
nCode += (maze.YSize - dimensionsObj.MinSize);
nCode *= (dimensionsObj.MaxXSize - dimensionsObj.MinSize + 1);
nCode += (maze.XSize - dimensionsObj.MinSize);
// Encode initial seed.
nCode *= SeedLimit;
nCode += maze.Seed;
#endregion
// v0: The resulting nCode is less than 26^12. See SWA.Ariadne.Model.Tests unit tests.
// v1: The resulting nCode is less than 36^6. See SWA.Ariadne.Model.Tests unit tests.
#region Convert the numeric code into a character code (base 26)
StringBuilder result = new StringBuilder(7);
for (int p = CodeLength; p-- > 0;)
{
int digit = (int)(nCode % CodeDigitRange);
nCode /= CodeDigitRange;
char c = CodeDigits[digit];
result.Insert(0, c);
}
switch (codeVersion)
{
case 0:
result.Insert(8, this.Separator);
result.Insert(4, this.Separator);
break;
case 1:
result.Insert(3, this.Separator);
break;
case 2:
result.Insert(3, this.Separator);
break;
}
#endregion
return(result.ToString());
}