public Chord2D(Vertex2D src, Vertex2D dst, Face2D face)
{
this.src = src;
this.dst = dst;
this.face = face;
this.connection = new List <Chord2D>();
}
void CheckAndAdd(Segment2D s, Face2D f)
{
if (!connections.ContainsKey(s))
{
connections.Add(s, new List <Face2D>());
}
connections[s].Add(f);
}
public List <Neighbor2D> GetNeighbors(Face2D f)
{
var neighbors0 = connections[f.Triangle.s0].FindAll(f2 => f2 != f).Select(f2 => new Neighbor2D(f2, f.Triangle.s0));
var neighbors1 = connections[f.Triangle.s1].FindAll(f2 => f2 != f).Select(f2 => new Neighbor2D(f2, f.Triangle.s1));
var neighbors2 = connections[f.Triangle.s2].FindAll(f2 => f2 != f).Select(f2 => new Neighbor2D(f2, f.Triangle.s2));
var neighbors = new List <Neighbor2D>();
neighbors.AddRange(neighbors0);
neighbors.AddRange(neighbors1);
neighbors.AddRange(neighbors2);
return(neighbors);
}
public Segment2D[] GetUncommonSegments(Face2D face)
{
var t0 = triangle;
var t1 = face.Triangle;
if (t1.HasSegment(t0.s0))
{
return(new Segment2D[] { t0.s1, t0.s2 });
}
else if (t1.HasSegment(t0.s1))
{
return(new Segment2D[] { t0.s0, t0.s2 });
}
return(new Segment2D[] { t0.s0, t0.s1 });
}
public Vertex2D GetUncommonPoint(Face2D face)
{
var t0 = triangle;
var t1 = face.Triangle;
if (!t1.HasPoint(t0.a))
{
return(t0.a);
}
else if (!t1.HasPoint(t0.b))
{
return(t0.b);
}
return(t0.c);
}
/*
* The chordal axis is obtained by connecting the midpoints of the internal edges.
*/
protected Chord2D GetChordalAxis(Face2D external, List <Face2D> faces)
{
var t = external.Triangle;
Vertex2D src, dst;
Segment2D dstEdge;
bool e0 = ExternalSegment(t.s0);
bool e1 = ExternalSegment(t.s1);
bool e2 = ExternalSegment(t.s2);
if (e0 && e1)
{
src = t.s0.HasPoint(t.s1.a) ? t.s1.a : t.s1.b;
dst = triangulation.CheckAndAddVertex(t.s2.Midpoint());
dstEdge = t.s2;
}
else if (e1 && e2)
{
src = t.s1.HasPoint(t.s2.a) ? t.s2.a : t.s2.b;
dst = triangulation.CheckAndAddVertex(t.s0.Midpoint());
dstEdge = t.s0;
}
else
{
src = t.s2.HasPoint(t.s0.a) ? t.s0.a : t.s0.b;
dst = triangulation.CheckAndAddVertex(t.s1.Midpoint());
dstEdge = t.s1;
}
var chord = new Chord2D(src, dst, external);
chord.SetDstEdge(dstEdge);
var connection = new Connection2D(faces);
ChordalAxisRoutine(chord, connection);
return(chord);
}
public void Remove(Face2D f)
{
connections[f.Triangle.s0].Remove(f);
connections[f.Triangle.s1].Remove(f);
connections[f.Triangle.s2].Remove(f);
}
public void Add(Face2D f)
{
CheckAndAdd(f.Triangle.s0, f);
CheckAndAdd(f.Triangle.s1, f);
CheckAndAdd(f.Triangle.s2, f);
}
public Neighbor2D(Face2D f, Segment2D s)
{
face = f;
joint = s;
}