public MapViewModel(ILogger <MapViewModel> logger)
{
_logger = logger;
// create a simple map for use with a start and end
var builder = new MapBuilder(30, 15);
builder.AddPath(1, 1, Directions.East, 5);
builder.AddPath(3, 1, Directions.South, 5);
builder.AddPath(3, 5, Directions.East, 5);
builder.AddStart(2, 1);
builder.AddEnd(5, 5);
Map = builder.Build();
}
public MapBuilder Generate(int width, int height, Algorithms algorithm = Algorithms.AldousBroderAvoidLinks)
{
var maze = GetMaze(width, height, algorithm);
Maze = maze;
var builder = new MapBuilder(width, height);
// find all horizontal paths
for (var y = 0; y < height; y++)
{
var onPath = false;
var pathStart = 0;
for (var x = 0; x < width; x++)
{
var cell = maze[y, x];
if (cell.EasternBoundary || !cell.Links.Contains(cell.East))
{
// so no path to the right
if (onPath)
{
// we've reached the end
onPath = false;
Debug.WriteLine($"Easterly path from [{pathStart},{y}] to [{x},{y}]");
builder.AddPath(pathStart, y, Directions.East, x - pathStart + 1);
}
}
else
{
if (!onPath)
{
onPath = true;
pathStart = x;
}
}
}
}
// find all vertical paths
for (var x = 0; x < width; x++)
{
var onPath = false;
var pathStart = 0;
for (var y = 0; y < height; y++)
{
var cell = maze[y, x];
if (cell.SouthernBoundary || !cell.Links.Contains(cell.South))
{
// so no path to the bottom
if (onPath)
{
// we've reached the end
onPath = false;
Debug.WriteLine($"Southerly path from [{x},{pathStart}] to [{x},{y}]");
builder.AddPath(x, pathStart, Directions.South, y - pathStart + 1);
}
}
else
{
if (!onPath)
{
onPath = true;
pathStart = y;
}
}
}
}
builder.AddStart(maze.LongestPath.First().Col, maze.LongestPath.First().Row);
builder.AddEnd(maze.LongestPath.Last().Col, maze.LongestPath.Last().Row);
return(builder);
}
