public static IslandEntity Random(GeoPoint center)
{
var random = new Random();
var corners = new List<GeoPoint>();
int currentAngle = 0;
while (currentAngle < 360)
{
var actual = random.Next(30) + 30;
var length = random.Next(10) + 5;
currentAngle += actual;
var x = (int) (Math.Cos(currentAngle * Math.PI / 360 * 2 ) * length);
var y = (int) (Math.Sin(currentAngle * Math.PI / 360 * 2) * length);
var point = new GeoPoint(x + center.X, y + center.Y);
corners.Add(point);
}
return new IslandEntity { Corners = corners.ToArray() };
}
public void AddIsland(IslandEntity island)
{
foreach (var item in island.GeneratePoints())
{
var point = new GeoPoint(item.X, item.Y);
points.Add(point, LocationType.Ground);
}
}
public void AddCity(CityEntity entity)
{
var point = new GeoPoint(entity.X, entity.Y);
points[point] = LocationType.City;
}
public PointContext(GeoPoint geopoint, TextureHolder texture)
{
GeoPoint = geopoint;
Texture = texture;
}
/// <summary>
/// Generates list of textures for given square, when left bottom corner is provided.
/// </summary>
/// <param name="lbx"></param>
/// <param name="lby"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <returns>Sequence contains textures, starting from left bottom corner and returning rows first.</returns>
public IEnumerable<PointContext> GetWindow(int lbx, int lby, int dx, int dy)
{
for (int y = 0; y < dy; y++)
for (int x = 0; x < dx; x++)
{
var geox = lbx + x;
var geoy = lby + y;
var area = new LocationType[9];
var centerOfArea = new GeoPoint(geox, geoy);
for (int i = 0; i < 9; i++) area[i] = LocationType.Water;
area[NeighborTopLeft] = points.ContainsKey(centerOfArea.TopLeft()) ? points[centerOfArea.TopLeft()] : LocationType.Water;
area[NeighborNorth] = points.ContainsKey(centerOfArea.Top()) ? points[centerOfArea.Top()] : LocationType.Water;
area[NeighborTopRight] = points.ContainsKey(centerOfArea.TopRight()) ? points[centerOfArea.TopRight()] : LocationType.Water;
area[NeighborWest] = points.ContainsKey(centerOfArea.Left()) ? points[centerOfArea.Left()] : LocationType.Water;
area[NeighborThis] = points.ContainsKey(centerOfArea) ? points[centerOfArea] : LocationType.Water;
area[NeighborEast] = points.ContainsKey(centerOfArea.Right()) ? points[centerOfArea.Right()] : LocationType.Water;
area[NeighborDownLeft] = points.ContainsKey(centerOfArea.DownLeft()) ? points[centerOfArea.DownLeft()] : LocationType.Water;
area[NeighborSouth] = points.ContainsKey(centerOfArea.Down()) ? points[centerOfArea.Down()] : LocationType.Water;
area[NeighborDownRight] = points.ContainsKey(centerOfArea.DownRight()) ? points[centerOfArea.DownRight()] : LocationType.Water;
var centerTexture = new TextureHolder();
foreach (var strategy in strategies)
{
var texture = strategy(area, centerTexture);
if (texture == centerTexture) continue;
centerTexture = texture;
break;
}
yield return new PointContext(centerOfArea, centerTexture);
}
}
