public VoronoiGraphImplemention(Voronoi v, int numLloyd, Random r, bool more) : base(v, numLloyd, r, more)
{
OCEAN = GetColor(ColorData.OCEAN);
LAKE = GetColor(ColorData.LAKE);
BEACH = GetColor(ColorData.BEACH);
RIVER = GetColor(ColorData.RIVER);
}
public static Vertex Intersect(HalfEdge hE0, HalfEdge hE1)
{
Edge e0;
Edge e1;
Edge e;
HalfEdge hE;
double determinant;
double intersectionX;
double intersectionY;
bool rightOfSite;
e0 = hE0.e;
e1 = hE1.e;
if (e0 == null || e1 == null)
{
return(null);
}
if (e0.GetRightSite() == e1.GetRightSite())
{
return(null);
}
determinant = (e0.a * e1.b) - (e0.b * e1.a);
if (determinant > -0.0000000001 && determinant < 0.0000000001)
{
return(null);
}
intersectionX = ((e0.c * e1.b) - (e1.c * e0.b)) / determinant;
intersectionY = ((e1.c * e0.a) - (e0.c * e1.a)) / determinant;
if (Voronoi.CompareByYThenX(e0.GetRightSite(), e1.GetRightSite()) < 0)
{
hE = hE0;
e = e0;
}
else
{
hE = hE1;
e = e1;
}
rightOfSite = intersectionX >= e.GetRightSite().coord.x;
if ((rightOfSite && (hE.orientation == Orientation.LEFT)) || (!rightOfSite && (hE.orientation == Orientation.RIGHT)))
{
return(null);
}
return(Vertex.Create(intersectionX, intersectionY));
}
private void BuildGraph(Voronoi v)
{
Dictionary <Point, Center> pCMap = new Dictionary <Point, Center>();
List <Point> points = v.SiteCoords();
// For each point create a center
foreach (Point p in points)
{
Center c = new Center();
c.loc = p;
c.index = centers.Count;
centers.Add(c);
pCMap[p] = c;
}
// For each center, assign a region
foreach (Center c in centers)
{
v.Region(c.loc);
}
List <Edge> libEdges = v.Edges();
Dictionary <int, Corner> pCRMap = new Dictionary <int, Corner>();
// For each edge in the voronoi edges
foreach (Edge e in libEdges)
{
LineSegment vEdge = e.VoronoiEdge();
LineSegment dEdge = e.DelaunayLine();
DelaunayEdge dE = new DelaunayEdge();
dE.index = edges.Count;
edges.Add(dE);
// Setup midpoints for viable voronoi edges for noisy edge generation
if (vEdge.p0 != null && vEdge.p1 != null)
{
dE.midPoint = InterpolatePoint(vEdge.p0, vEdge.p1, 0.5);
}
// Create corners for the voronoi vertices of the edge
dE.v0 = MakeCorner(pCRMap, vEdge.p0);
dE.v1 = MakeCorner(pCRMap, vEdge.p1);
dE.d0 = pCMap[dEdge.p0];
dE.d1 = pCMap[dEdge.p1];
// Add borders for delaunay edges
if (dE.d0 != null)
{
dE.d0.borders.Add(dE);
}
if (dE.d1 != null)
{
dE.d1.borders.Add(dE);
}
if (dE.v0 != null)
{
dE.v0.protrudes.Add(dE);
}
if (dE.v1 != null)
{
dE.v1.protrudes.Add(dE);
}
if (dE.d0 != null && dE.d1 != null)
{
AddToCenterList(dE.d0.neighbors, dE.d1);
AddToCenterList(dE.d1.neighbors, dE.d0);
}
if (dE.v0 != null && dE.v1 != null)
{
AddToCornerList(dE.v0.adjacent, dE.v1);
AddToCornerList(dE.v1.adjacent, dE.v0);
}
if (dE.d0 != null)
{
AddToCornerList(dE.d0.corners, dE.v0);
AddToCornerList(dE.d0.corners, dE.v1);
}
if (dE.d1 != null)
{
AddToCornerList(dE.d1.corners, dE.v0);
AddToCornerList(dE.d1.corners, dE.v1);
}
if (dE.v0 != null)
{
AddToCenterList(dE.v0.touches, dE.d0);
AddToCenterList(dE.v0.touches, dE.d1);
}
if (dE.v1 != null)
{
AddToCenterList(dE.v1.touches, dE.d0);
AddToCenterList(dE.v1.touches, dE.d1);
}
}
}
public VoronoiGraph(Voronoi v, int numLloyd, Random r, bool more)
{
// MORE_RANDOM adds more height to everything using the random number generator
this.MORE_RANDOM = more;
this.r = r;
// Angles used for Radial Map Generation
bumps = r.Next(5) + 1;
startAngle = r.NextDouble() * 2 * Math.PI;
dipAngle = r.NextDouble() * 2 * Math.PI;
dipWidth = r.NextDouble() * 0.5 + 0.2;
// Gets the bounds
bounds = v.GetPlotBounds();
// Applies Lloyd Relaxation to the points (moving the points to the center of the voronoi polygons,
// then recreating the voronoi graph, makes things look more appealing to the eye)
for (int i = 0; i < numLloyd; ++i)
{
List <Point> points = v.SiteCoords();
foreach (Point p in points)
{
List <Point> region = v.Region(p);
double x = 0;
double y = 0;
foreach (Point c in region)
{
x += c.x;
y += c.y;
}
x /= region.Count;
y /= region.Count;
p.x = x;
p.y = y;
}
v = new Voronoi(points, v.GetPlotBounds());
}
// Generates Simplex noise graph for Simplex Noise map generation
MakeNoise(r.Next());
// Sets up the graph
BuildGraph(v);
// Fixes the corners because the Lloyd relaxation will have ruined them
ImproveCorners();
// Assigns the elevations, determines oceans and land
AssignCornerElevations();
AssignOceanCoastAndLand();
RedistributeElevations(LandCorners());
AssignPolygonElevations();
// Calculates the slopes, rivers, and general moisture
CalculateDownSlopes();
CreateRivers();
AssignCornerMoisture();
RedistributeMoisture(LandCorners());
AssignPolygonMoisture();
// Assigns biomes based on height/moisture
AssignBiomes();
// Creates noisy edges for each voronoi polygon for a more interesting look (toggleable)
BuildNoisyEdges();
// Unused
pixelCenterMap = new System.Drawing.Bitmap((int)bounds.width, (int)bounds.width);
}