public static Mesh CreateVoronoiMesh(GK.VoronoiDiagram diagram)
{
Mesh mesh = new Mesh();
Vector3[] vertices = new Vector3[diagram.Vertices.Count];
Vector2[] uv = new Vector2[diagram.Vertices.Count];
int[] indices = new int[diagram.Edges.Count * 2];
for (int i = 0; i < diagram.Vertices.Count; i++)
{
vertices[i] = diagram.Vertices[i];
uv[i] = diagram.Vertices[i];
}
int j = 0;
for (int i = 0; i < diagram.Edges.Count; i++)
{
if (diagram.Edges[i].Type == GK.VoronoiDiagram.EdgeType.Segment)
{
indices[j] = diagram.Edges[i].Vert0;
indices[j + 1] = diagram.Edges[i].Vert1;
j += 2;
}
}
mesh.SetVertices(vertices);
mesh.uv = uv;
mesh.SetIndices(indices, MeshTopology.Lines, 0);
return(mesh);
}
/// <summary>
/// Calculate a voronoi diagram and return it.
/// </summary>
public VoronoiDiagram CalculateDiagram(IList <Vector2> inputVertices)
{
VoronoiDiagram result = null;
CalculateDiagram(inputVertices, ref result);
return(result);
}
// calcula o diagrama de voronoi link para a implementação utilizada: https://github.com/OskarSigvardsson/unity-delaunay
// serve mais para ser usar a triangulação de delaunay do resultado do diagrama
public void BuildVoronoi()
{
var points2d = Graham.GetPointVectorList();
GK.VoronoiCalculator voronoiCalculator = new GK.VoronoiCalculator();
Diagram = voronoiCalculator.CalculateDiagram(Graham.GetPointVectorList());
//var extends = Map.GetComponent<MeshFilter>().mesh.bounds.size;
//extends.Scale(Map.transform.localScale);
VoronoiMesh = CreateVoronoiMesh(Diagram);
BuildGraph();
}
public static Mesh CreateTriangulationMesh(GK.VoronoiDiagram diagram, int[] indices)
{
Mesh mesh = new Mesh();
Vector3[] vertices = new Vector3[diagram.Triangulation.Vertices.Count];
Vector2[] uv = new Vector2[diagram.Triangulation.Vertices.Count];
for (int i = 0; i < diagram.Triangulation.Vertices.Count; i++)
{
vertices[i] = diagram.Triangulation.Vertices[i];
uv[i] = diagram.Triangulation.Vertices[i];
}
mesh.SetVertices(vertices);
mesh.uv = uv;
mesh.SetIndices(indices, MeshTopology.Lines, 0);
return(mesh);
}
/// <summary>
/// Non-allocating version of CalculateDiagram.
///
/// I guess it's not strictly true that it generates NO garbage, because
/// it might if it has to resize internal buffers, but all buffers are
/// reused from invocation to invocation.
/// </summary>
public void CalculateDiagram(IList <Vector2> inputVertices, ref VoronoiDiagram result)
{
// TODO: special case for 1 points
// TODO: special case for 2 points
// TODO: special case for 3 points
// TODO: special case for collinear points
if (inputVertices.Count < 3)
{
throw new NotImplementedException("Not implemented for < 3 vertices");
}
if (result == null)
{
result = new VoronoiDiagram();
}
var trig = result.Triangulation;
result.Clear();
Profiler.BeginSample("Delaunay triangulation");
delCalc.CalculateTriangulation(inputVertices, ref trig);
Profiler.EndSample();
pts.Clear();
var verts = trig.Vertices;
var tris = trig.Triangles;
var centers = result.Vertices;
var edges = result.Edges;
if (tris.Count > pts.Capacity)
{
{
pts.Capacity = tris.Count;
}
}
if (tris.Count > edges.Capacity)
{
edges.Capacity = tris.Count;
}
for (int ti = 0; ti < tris.Count; ti += 3)
{
var p0 = verts[tris[ti]];
var p1 = verts[tris[ti + 1]];
var p2 = verts[tris[ti + 2]];
// Triangle is in CCW order
Debug.Assert(Geom.ToTheLeft(p2, p0, p1));
centers.Add(Geom.CircumcircleCenter(p0, p1, p2));
}
for (int ti = 0; ti < tris.Count; ti += 3)
{
pts.Add(new PointTriangle(tris[ti], ti));
pts.Add(new PointTriangle(tris[ti + 1], ti));
pts.Add(new PointTriangle(tris[ti + 2], ti));
}
cmp.tris = tris;
cmp.verts = verts;
Profiler.BeginSample("Sorting");
pts.Sort(cmp);
Profiler.EndSample();
// The comparer lives on between runs of the algorithm, so clear the
// reference to the arrays so that the reference is lost. It may be
// the case that the calculator lives on much longer than the
// results, and not clearing these would keep the results alive,
// leaking memory.
cmp.tris = null;
cmp.verts = null;
for (int i = 0; i < pts.Count; i++)
{
result.FirstEdgeBySite.Add(edges.Count);
var start = i;
var end = -1;
for (int j = i + 1; j < pts.Count; j++)
{
if (pts[i].Point != pts[j].Point)
{
end = j - 1;
break;
}
}
if (end == -1)
{
end = pts.Count - 1;
}
i = end;
var count = end - start;
Debug.Assert(count >= 0);
for (int ptiCurr = start; ptiCurr <= end; ptiCurr++)
{
bool isEdge;
var ptiNext = ptiCurr + 1;
if (ptiNext > end)
{
ptiNext = start;
}
var ptCurr = pts[ptiCurr];
var ptNext = pts[ptiNext];
var tiCurr = ptCurr.Triangle;
var tiNext = ptNext.Triangle;
var p0 = verts[ptCurr.Point];
var v2nan = new Vector2(float.NaN, float.NaN);
if (count == 0)
{
isEdge = true;
}
else if (count == 1)
{
var cCurr = Geom.TriangleCentroid(verts[tris[tiCurr]], verts[tris[tiCurr + 1]], verts[tris[tiCurr + 2]]);
var cNext = Geom.TriangleCentroid(verts[tris[tiNext]], verts[tris[tiNext + 1]], verts[tris[tiNext + 2]]);
isEdge = Geom.ToTheLeft(cCurr, p0, cNext);
}
else
{
isEdge = !SharesEdge(tris, tiCurr, tiNext);
}
if (isEdge)
{
Vector2 v0, v1;
if (ptCurr.Point == tris[tiCurr])
{
v0 = verts[tris[tiCurr + 2]] - verts[tris[tiCurr + 0]];
}
else if (ptCurr.Point == tris[tiCurr + 1])
{
v0 = verts[tris[tiCurr + 0]] - verts[tris[tiCurr + 1]];
}
else
{
Debug.Assert(ptCurr.Point == tris[tiCurr + 2]);
v0 = verts[tris[tiCurr + 1]] - verts[tris[tiCurr + 2]];
}
if (ptNext.Point == tris[tiNext])
{
v1 = verts[tris[tiNext + 0]] - verts[tris[tiNext + 1]];
}
else if (ptNext.Point == tris[tiNext + 1])
{
v1 = verts[tris[tiNext + 1]] - verts[tris[tiNext + 2]];
}
else
{
Debug.Assert(ptNext.Point == tris[tiNext + 2]);
v1 = verts[tris[tiNext + 2]] - verts[tris[tiNext + 0]];
}
edges.Add(new VoronoiDiagram.Edge(
VoronoiDiagram.EdgeType.RayCCW,
ptCurr.Point,
tiCurr / 3,
-1,
Geom.RotateRightAngle(v0)
));
edges.Add(new VoronoiDiagram.Edge(
VoronoiDiagram.EdgeType.RayCW,
ptCurr.Point,
tiNext / 3,
-1,
Geom.RotateRightAngle(v1)
));
}
else
{
if (!Geom.AreCoincident(centers[tiCurr / 3], centers[tiNext / 3]))
{
edges.Add(new VoronoiDiagram.Edge(
VoronoiDiagram.EdgeType.Segment,
ptCurr.Point,
tiCurr / 3,
tiNext / 3,
v2nan
));
}
}
}
}
}
/// <summary>
/// Clip site of voronoi diagram using polygon (must be convex),
/// returning the clipped vertices in clipped list. Modifies neither
/// polygon nor diagram, so can be run in parallel for several sites at
/// once.
/// </summary>
public void ClipSite(VoronoiDiagram diag, IList <Vector2> polygon, int site, ref List <Vector2> clipped)
{
pointsIn.Clear();
pointsIn.AddRange(polygon);
int firstEdge, lastEdge;
if (site == diag.Sites.Count - 1)
{
firstEdge = diag.FirstEdgeBySite[site];
lastEdge = diag.Edges.Count - 1;
}
else
{
firstEdge = diag.FirstEdgeBySite[site];
lastEdge = diag.FirstEdgeBySite[site + 1] - 1;
}
for (int ei = firstEdge; ei <= lastEdge; ei++)
{
pointsOut.Clear();
var edge = diag.Edges[ei];
Vector2 lp, ld;
if (edge.Type == VoronoiDiagram.EdgeType.RayCCW || edge.Type == VoronoiDiagram.EdgeType.RayCW)
{
lp = diag.Vertices[edge.Vert0];
ld = edge.Direction;
if (edge.Type == VoronoiDiagram.EdgeType.RayCW)
{
ld *= -1;
}
}
else if (edge.Type == VoronoiDiagram.EdgeType.Segment)
{
var lp0 = diag.Vertices[edge.Vert0];
var lp1 = diag.Vertices[edge.Vert1];
lp = lp0;
ld = lp1 - lp0;
}
else if (edge.Type == VoronoiDiagram.EdgeType.Line)
{
throw new NotSupportedException("Haven't implemented voronoi halfplanes yet");
}
else
{
Debug.Assert(false);
return;
}
for (int pi0 = 0; pi0 < pointsIn.Count; pi0++)
{
var pi1 = pi0 == pointsIn.Count - 1 ? 0 : pi0 + 1;
var p0 = pointsIn[pi0];
var p1 = pointsIn[pi1];
var p0Inside = Geom.ToTheLeft(p0, lp, lp + ld);
var p1Inside = Geom.ToTheLeft(p1, lp, lp + ld);
if (p0Inside && p1Inside)
{
pointsOut.Add(p1);
}
else if (!p0Inside && !p1Inside)
{
// Do nothing, both are outside
}
else
{
var intersection = Geom.LineLineIntersection(lp, ld.normalized, p0, (p1 - p0).normalized);
if (p0Inside)
{
pointsOut.Add(intersection);
}
else if (p1Inside)
{
pointsOut.Add(intersection);
pointsOut.Add(p1);
}
else
{
Debug.Assert(false);
}
}
}
var tmp = pointsIn;
pointsIn = pointsOut;
pointsOut = tmp;
}
if (clipped == null)
{
clipped = new List <Vector2>();
}
else
{
clipped.Clear();
}
clipped.AddRange(pointsIn);
/*
* pointsIn.Clear();
*
* pointsIn.AddRange(polygon);
*
* int firstEdge, lastEdge;
*
* if (site == diag.Sites.Count - 1)
* {
* firstEdge = diag.FirstEdgeBySite[site];
* lastEdge = diag.Edges.Count - 1;
* }
* else
* {
* firstEdge = diag.FirstEdgeBySite[site];
* lastEdge = diag.FirstEdgeBySite[site + 1] - 1;
* }
*
* for (int ei = firstEdge; ei <= lastEdge; ei++)
* {
* pointsOut.Clear();
*
* var edge = diag.Edges[ei];
*
* Vector2 lp, ld;
*
* if (edge.Type == VoronoiDiagram.EdgeType.RayCCW || edge.Type == VoronoiDiagram.EdgeType.RayCW)
* {
* lp = diag.Vertices[edge.Vert0];
* ld = edge.Direction;
*
* if (edge.Type == VoronoiDiagram.EdgeType.RayCW)
* {
* ld *= -1;
* }
* }
* else if (edge.Type == VoronoiDiagram.EdgeType.Segment)
* {
* var lp0 = diag.Vertices[edge.Vert0];
* var lp1 = diag.Vertices[edge.Vert1];
*
* lp = lp0;
* ld = lp1 - lp0;
* }
* else if (edge.Type == VoronoiDiagram.EdgeType.Line)
* {
* throw new NotSupportedException("Haven't implemented voronoi halfplanes yet");
* }
* else
* {
* Debug.Assert(false);
* return;
* }
*
* for (int pi0 = 0; pi0 < pointsIn.Count; pi0++)
* {
* var pi1 = pi0 == pointsIn.Count - 1 ? 0 : pi0 + 1;
*
* var p0 = pointsIn[pi0];
* var p1 = pointsIn[pi1];
*
* var p0Inside = Geom.ToTheLeft(p0, lp, lp + ld);
* var p1Inside = Geom.ToTheLeft(p1, lp, lp + ld);
*
* if (p0Inside && p1Inside)
* {
* pointsOut.Add(p1);
* }
* else if (!p0Inside && !p1Inside)
* {
* // Do nothing, both are outside
* }
* else
* {
* var intersection = Geom.LineLineIntersection(lp, ld.normalized, p0, (p1 - p0).normalized);
*
* if (p0Inside)
* {
* pointsOut.Add(intersection);
* }
* else if (p1Inside)
* {
* pointsOut.Add(intersection);
* pointsOut.Add(p1);
* }
* else
* {
* Debug.Assert(false);
* }
* }
* }
*
* if(pointsOut.Count == 0)
* {
* //pointsOut = new List<Vector2>(pointsIn);
* }
*
* var tmp = pointsIn;
* pointsIn = pointsOut;
* pointsOut = tmp;
* }
*
* if (clipped == null)
* {
* clipped = new List<Vector2>();
* }
* else
* {
* clipped.Clear();
* }
*
* clipped.AddRange(pointsIn);
*
*/
}
public void FixSiteEdges(ref VoronoiDiagram diag, int site)
{
if (diag == null)
{
return;
}
List <test> poly = new List <test>();
int firstEdge, lastEdge;
Vector2 polyCenter = Vector2.zero;
if (site == diag.Sites.Count - 1)
{
firstEdge = diag.FirstEdgeBySite[site];
lastEdge = diag.Edges.Count - 1;
}
else
{
firstEdge = diag.FirstEdgeBySite[site];
lastEdge = diag.FirstEdgeBySite[site + 1] - 1;
}
for (int i = firstEdge; i < lastEdge; i++)
{
test _test = new test();
_test.index = diag.Edges[i].Vert0;
_test.diag = diag;
poly.Add(_test);
polyCenter += diag.Vertices[poly[poly.Count - 1].index];
}
polyCenter /= poly.Count;
//VALIDATE
for (int i = 0; i < poly.Count; i++)
{
for (int j = 0; j < poly.Count; j++)
{
if (poly[i].index == poly[j].index)
{
Debug.LogError("THEY MATCH THIS IS BAD");
}
}
}
//List<Vector2> polyList = new List<Vector2>();
//foreach (test t in poly)
//{
// polyList.Add(new Vector2(diag.Vertices[t.index].x, diag.Vertices[t.index].y));
//}
//CityTest.LineRenderPoly(polyList);
poly.Sort((a, b) =>
{
double a2 = ((Mathf.Rad2Deg * (Mathf.Atan2(a.diag.Vertices[a.index].x - polyCenter.x, a.diag.Vertices[a.index].y - polyCenter.y)) + 360.0f) % 360.0f);
double a1 = ((Mathf.Rad2Deg * (Math.Atan2(a.diag.Vertices[b.index].x - polyCenter.x, a.diag.Vertices[b.index].y - polyCenter.y)) + 360.0f) % 360.0f);
return((int)(a1 - a2));
}
//((Mathf.Rad2Deg * (Mathf.Atan2(a.diag.Vertices[a.index].x - polyCenter.x, a.diag.Vertices[a.index].y - polyCenter.y)) + 360) % 360).CompareTo((Mathf.Rad2Deg * (Math.Atan2(a.diag.Vertices[b.index].x - polyCenter.x, a.diag.Vertices[b.index].y - polyCenter.y)) + 360) % 360)
);
//polyList.Clear();
//foreach (test t in poly)
//{
// polyList.Add(new Vector2(diag.Vertices[t.index].x, diag.Vertices[t.index].y));
//}
//CityTest.LineRenderPoly(polyList);
for (int i = 0; i < poly.Count; i++)
{
int nextIndex = poly[0].index;
if (nextIndex + 1 < poly.Count)
{
nextIndex = poly[i + 1].index;
}
diag.Edges[firstEdge + i] = new VoronoiDiagram.Edge(diag.Edges[i].Type, diag.Edges[i].Site, poly[i].index, nextIndex, diag.Vertices[nextIndex] - diag.Vertices[poly[i].index]);
}
//List<Vector2> poly222 = new List<Vector2>();
//
//for (int ei = firstEdge; ei <= lastEdge; ei++)
//{
// poly222.Add(diag.Vertices[diag.Edges[ei].Vert0]);
//}
//
//CityTest.LineRenderPoly(poly222);
}
public void GenerateCity()
{
// use our seed for generation
Random.State currentRNGState = Random.state;
Random.InitState(citySeed);
myCity = new City();
myCity.thisCity = new GameObject("NewCity");
myCity.cityNoiseOffset = new Vector2(Random.Range(-10000, 10000), Random.Range(-10000, 10000));
GK.VoronoiDiagram cityDiagram = new GK.VoronoiDiagram();
//generate points
List <Vector2> points = CreateCityPoint(myCity.cityNoiseOffset);// calulate voroni fracture sites
//calculate city
cityDiagram = new GK.VoronoiCalculator().CalculateDiagram(points);//calculate vorino diagram (ie roads seperating suburbs) using out sites
//bounding
List <Vector2> Polygon = new List <Vector2>();
Polygon.Add(new Vector2(0, 0));
Polygon.Add(new Vector2(citySize.x, 0));
Polygon.Add(new Vector2(citySize.x, citySize.y));
Polygon.Add(new Vector2(0, citySize.y));
List <Vector2> clippedSite = new List <Vector2>();
for (int siteIndex = 0; siteIndex < cityDiagram.Sites.Count; siteIndex++)
{
new GK.VoronoiClipper().ClipSite(cityDiagram, Polygon, siteIndex, ref clippedSite);// clip each of our suburbs
if (clippedSite.Count > 0)
{
// assign and create a suburb object
Suburb newSuburb = new Suburb();
myCity.suburbs.Add(newSuburb);
newSuburb.thisSuburb = new GameObject("Suburb");
newSuburb.sitePosition = cityDiagram.Sites[siteIndex];
newSuburb.thisSuburb.transform.position = new Vector3(newSuburb.sitePosition.x, 0, newSuburb.sitePosition.y);
newSuburb.thisSuburb.transform.SetParent(myCity.thisCity.transform);
newSuburb.borders = new List <Vector2>(clippedSite);
float xCoord = myCity.cityNoiseOffset.x + newSuburb.sitePosition.x / citySize.x * noiseScale;
float yCoord = myCity.cityNoiseOffset.x + newSuburb.sitePosition.y / citySize.y * noiseScale;
float noiseValue = curve.Evaluate(Mathf.PerlinNoise(xCoord, yCoord));
for (int i = 0; i < curve.keys.Length; i++)//set which type of suburb will be generated bassed off our noise weight at the suburbs position
{
if (noiseValue == curve.keys[i].value)
{
switch (i)
{
case 0:
{
newSuburb.suburbType = residentialSettings;
break;
}
case 1:
{
newSuburb.suburbType = urbanSettings;
break;
}
default:
{
newSuburb.suburbType = citySettings;
break;
}
}
}
}
newSuburb.seed = Random.Range(int.MinValue, int.MaxValue);
}
}
Random.state = currentRNGState;
}