// Extracts edge and vertex info from TriangletNet Delauney data structure.
public void ObtainVerticesEdgesAndFaces()
{
print("CONVERTING TRIANGLENET OUTPUT TO UNITY MESH.");
TriangleNet.Topology.DCEL.DcelMesh mesh2 = this.mesh2;
vertices = new Vector3[mesh2.Vertices.Count];
for (int indver = 0; indver < mesh2.Vertices.Count; ++indver)
{
vertices[indver].x = (float)mesh2.Vertices[indver].X;
vertices[indver].z = (float)mesh2.Vertices[indver].Y;
}
halfedges = new HalfEdge[mesh2.HalfEdges.Count];
for (int indhe = 0; indhe < mesh2.HalfEdges.Count; ++indhe)
{
halfedges[indhe].id = mesh2.HalfEdges[indhe].ID;
halfedges[indhe].twin_id = mesh2.HalfEdges[indhe].Twin.ID;
halfedges[indhe].start = (int)mesh2.HalfEdges[indhe].Origin.id;
halfedges[indhe].end = (int)mesh2.HalfEdges[indhe].Twin.Origin.id;
halfedges[indhe].face = mesh2.HalfEdges[indhe].Face.ID;
}
faces = new VoronoiFace[mesh2.Faces.Count];
for (int indf = 0; indf < mesh2.Faces.Count; ++indf)
{
faces[indf].merged = false;
faces[indf].origin_x = (float)mesh2.Faces[indf].generator.X;
faces[indf].origin_y = (float)mesh2.Faces[indf].generator.Y;
faces[indf].id = mesh2.Faces[indf].ID;
faces[indf].half_edges = new List <HalfEdge>();
faces[indf].neighbors = new List <int>();
for (int indhe = 0; indhe < halfedges.Length; ++indhe)
{
if (halfedges[indhe].face == mesh2.Faces[indf].ID)
{
faces[indf].half_edges.Add(halfedges[indhe]);
faces[indf].neighbors.Add(halfedges[halfedges[indhe].twin_id].face);
}
}
}
}
public virtual void GenerateMap()
{
print("GENERATING TRANGULATION.");
UnityEngine.Random.InitState(0);
// What does this do?
float[] seed = new float[octaves];
for (int i = 0; i < octaves; i++)
{
seed[i] = UnityEngine.Random.Range(0.0f, 100.0f);
}
Polygon polygon = new Polygon();
for (int i = 0; i < randomPoints; i++)
{
polygon.Add(new Vertex(UnityEngine.Random.Range(0.0f, xsize), UnityEngine.Random.Range(0.0f, ysize)));
}
// Generate Delauney triangulation from points.
TriangleNet.Meshing.ConstraintOptions options = new TriangleNet.Meshing.ConstraintOptions()
{
ConformingDelaunay = true
};
TriangleNet.Mesh mesh = (TriangleNet.Mesh)polygon.Triangulate(options);
// Generate Voronoi Tesselation from Delauney triangulation.
//mesh2 = (TriangleNet.Topology.DCEL.DcelMesh)(new StandardVoronoi(mesh, new TriangleNet.Geometry.Rectangle(0f, 0f, (float)xsize, (float)ysize)));
mesh2 = (TriangleNet.Topology.DCEL.DcelMesh)(new BoundedVoronoi(mesh));
// Post-processing and object-generation.
ObtainVerticesEdgesAndFaces();
//RemoveShortEdges();
GenerateMesh();
MergeSmallFaces();
PopulateFacesManagers();
// Drawing calls. (Explicit or implicit.)
DrawEdges();
DrawEdgeLabels();
DrawFaceLabels();
//GenerateVertexSpheres();
GenerateFaceCenterSpheres();
}
public static DcelMesh ToDCEL(Mesh mesh)
{
var dcel = new DcelMesh();
var vertices = new HVertex[mesh.vertices.Count];
var faces = new Face[mesh.triangles.Count];
dcel.HalfEdges.Capacity = 2 * mesh.NumberOfEdges;
mesh.Renumber();
HVertex vertex;
foreach (var v in mesh.vertices.Values)
{
vertex = new HVertex(v.x, v.y);
vertex.id = v.id;
vertex.label = v.label;
vertices[v.id] = vertex;
}
// Maps a triangle to its 3 edges (used to set next pointers).
var map = new List<HalfEdge>[mesh.triangles.Count];
Face face;
foreach (var t in mesh.triangles)
{
face = new Face(null);
face.id = t.id;
faces[t.id] = face;
map[t.id] = new List<HalfEdge>(3);
}
Otri tri = default(Otri), neighbor = default(Otri);
TriangleNet.Geometry.Vertex org, dest;
int id, nid, count = mesh.triangles.Count;
HalfEdge edge, twin, next;
var edges = dcel.HalfEdges;
// Count half-edges (edge ids).
int k = 0;
// Maps a vertex to its leaving boundary edge.
var boundary = new Dictionary<int, HalfEdge>();
foreach (var t in mesh.triangles)
{
id = t.id;
tri.tri = t;
for (int i = 0; i < 3; i++)
{
tri.orient = i;
tri.Sym(ref neighbor);
nid = neighbor.tri.id;
if (id < nid || nid < 0)
{
face = faces[id];
// Get the endpoints of the current triangle edge.
org = tri.Org();
dest = tri.Dest();
// Create half-edges.
edge = new HalfEdge(vertices[org.id], face);
twin = new HalfEdge(vertices[dest.id], nid < 0 ? Face.Empty : faces[nid]);
map[id].Add(edge);
if (nid >= 0)
{
map[nid].Add(twin);
}
else
{
boundary.Add(dest.id, twin);
}
// Set leaving edges.
edge.origin.leaving = edge;
twin.origin.leaving = twin;
// Set twin edges.
edge.twin = twin;
twin.twin = edge;
edge.id = k++;
twin.id = k++;
edges.Add(edge);
edges.Add(twin);
}
}
}
// Set next pointers for each triangle face.
foreach (var t in map)
{
edge = t[0];
next = t[1];
if (edge.twin.origin.id == next.origin.id)
{
edge.next = next;
next.next = t[2];
t[2].next = edge;
}
else
{
edge.next = t[2];
next.next = edge;
t[2].next = next;
}
}
// Resolve boundary edges.
foreach (var e in boundary.Values)
{
e.next = boundary[e.twin.origin.id];
}
dcel.Vertices.AddRange(vertices);
dcel.Faces.AddRange(faces);
return dcel;
}
