public List<District> CreateCityDistricts(CitySettings settings,VoronoiDiagram voronoi)
{
_citySettings = settings;
//create districts cells from the voronoi cells
_districtCells = GenerateDistrictCells(voronoi);
//create districts from the corresponding district cells
return settings.DistrictSettings.Select(CreateDistrict).ToList();
}
public static CityData GenerateCity(CitySettings settings, VoronoiDiagram voronoi)
{
if (voronoi.VoronoiCells.Count < 1)
return null;
//Create helpers if none are created.
if (_districtBuilder == null)
{
_districtBuilder = new DistrictBuilder();
}
//Generate the city
var cityData = new CityData();
voronoi.RefreshVoronoi();
//divide the city into districts
cityData.Districts = _districtBuilder.CreateCityDistricts(settings,voronoi);
cityData.Bounds = MathHelpers.GetCityBounds(cityData);
return cityData;
}
/// <summary>
/// Generate a Voronoi Diagram from the generated points
/// </summary>
private void GenerateVoronoi()
{
//check if there are enough points
if (_points == null || _points.Count <= 2 || _voronoiDiagram.Triangulation == null)
{
Console.WriteLine("No points available!");
GeneratePoints(PointsToGenerate);
//return;
}
_baseColor = Extensions.Extensions.RandomColor();
_voronoiSettings.VoronoiAlgorithm = VoronoiAlgorithm;
//create voronoi using specified algorithm
var timer = Stopwatch.StartNew();
_voronoiDiagram = VoronoiGenerator.CreateVoronoi(_points, _voronoiSettings);
timer.Stop();
if (_voronoiDiagram == null)
return;
//update info
var time = timer.ElapsedMilliseconds/1000.0;
GenerationTimeText = $"For {_points.Count} points using {VoronoiAlgorithm.ToString()}: {time} seconds.";
//Update canvas
RefreshCanvas();
}
/// <summary>
/// Initialize this viewModel
/// </summary>
public void Initialize(DrawService drawService)
{
//initialize draw service
_drawService = drawService;
//_drawService.OnClick += OnClick;
//create empty voronoi Diagram
_points = new List<Point>();
_voronoiDiagram = new VoronoiDiagram();
_cityData = new CityData();
_citySettings = new CitySettings();
//seed for random generation
Seed = DateTime.Now.GetHashCode();
//store default settings
foreach (var districtType in _districtTypes)
{
DistrictSettings.Add(new DistrictSettings(districtType));
break;
}
RaisePropertyChanged("DistrictSettings");
//debug for math test and drawing
MathTesting();
}
private List<DistrictCell> GenerateDistrictCells(VoronoiDiagram voronoi)
{
//Create a district cell from the voronoi cells
var districtCells = new List<DistrictCell>();
foreach (var cell in voronoi.GetCellsInBounds())
{
//ignore cells that are not valid
if (cell.Edges.Count < 2)
{
continue;
}
districtCells.Add(DistrictCell.FromCell(cell,_citySettings.DistrictSettings[0].Type));
}
//tag random cells based on the settings for each district
foreach (var setting in _citySettings.DistrictSettings)
{
for (int i = 0; i < setting.Frequency; ++i)
{
//Get a random start cell from the voronoi
var startCell = districtCells.GetRandomValue();
//size is a ratio of the width and length of the plane
var size = setting.Size * ((voronoi.Bounds.Right + voronoi.Bounds.Bottom)/8);
//tag cell
districtCells.TagCells(startCell, size, setting.Type);
}
}
return districtCells;
}