/// <summary>
/// Sleeve部分のChordを作成する
/// </summary>
/// <param name="from">From.</param>
/// <param name="neighbor">Neighbor.</param>
/// <param name="pushChords">Push chords.</param>
void MakeSleeveChord(Chord2D from, Face2D neighbor, ref List <Chord2D> pushChords)
{
Edge2D[] nextDstEdge;
if (!neighbor.TryGetOtheInteriorEdge(from.dstEdge, out nextDstEdge))
{
throw new System.Exception("辺の内外判定が不正です。");
}
var chord = new Chord2D();
chord.face = neighbor;
chord.src = from.dst;
chord.srcEdge = from.dstEdge;
chord.dstEdge = nextDstEdge[0];
chord.dst = chord.dstEdge.mid;
from.connections.Add(chord);
var pair = new Chord2D();
pair.face = neighbor;
pair.src = chord.dst;
pair.srcEdge = chord.dstEdge;
pair.dstEdge = chord.srcEdge;
pair.dst = from.dst;
pair.connections.Add(from.pair);
chord.pair = pair;
pair.pair = chord;
pushChords.Add(chord);
sleeveChords.Add(chord);
}
/// <summary>
/// Terminal部分のChordを作成する
/// </summary>
/// <param name="from">From.</param>
/// <param name="neighbor">Neighbor.</param>
/// <param name="pushChords">Push chords.</param>
void MakeTerminalChord(Chord2D from, Face2D neighbor, ref List <Chord2D> pushChords)
{
var chord = new Chord2D();
chord.face = neighbor;
chord.src = neighbor.ExcludeVertex(from.dstEdge);
chord.dstEdge = from.dstEdge;
chord.dst = chord.dstEdge.mid;
chord.pair = chord;
chord.connections.Add(from.pair);
from.connections.Add(chord);
terminalChords.Add(chord);
}
/// <summary>
/// 入力したChordを削除する
/// </summary>
/// <param name="chord">Chord.</param>
public void RemoveChord(Chord2D chord)
{
switch (chord.face.category)
{
case Face2D.Category.Sleeve:
sleeveChords.Remove(chord);
sleeveChords.Remove(chord.pair);
break;
case Face2D.Category.Junction:
junctionChords.Remove(chord);
junctionChords.Remove(chord.pair);
break;
case Face2D.Category.Terminal:
terminalChords.Remove(chord);
terminalChords.Remove(chord.pair);
break;
}
chord.DisconnectSelf();
}
/// <summary>
/// Junction部分のChordを作成する
/// </summary>
/// <param name="from">From.</param>
/// <param name="neighbor">Neighbor.</param>
/// <param name="pushChords">Push chords.</param>
void MakeJunctionChord(Chord2D from, Face2D neighbor, ref List <Chord2D> pushChords)
{
var chord = new Chord2D();
chord.face = neighbor;
chord.src = from.dst;
chord.srcEdge = from.dstEdge;
chord.dst = neighbor.g;
from.connections.Add(chord);
var pair = new Chord2D();
pair.face = neighbor;
pair.src = chord.dst;
pair.dstEdge = from.dstEdge;
pair.dst = chord.src;
pair.connections.Add(from.pair);
chord.pair = pair;
pair.pair = chord;
junctionChords.Add(chord);
Edge2D[] otherEdges;
if (!neighbor.TryGetOtheInteriorEdge(from.dstEdge, out otherEdges))
{
throw new System.Exception("辺の内外判定が不正です。");
}
foreach (var e in otherEdges)
{
var c = new Chord2D();
c.face = neighbor;
c.src = chord.dst;
c.dst = e.mid;
c.dstEdge = e;
chord.connections.Add(c);
var p = new Chord2D();
p.face = neighbor;
p.src = c.dst;
c.srcEdge = e;
p.dst = c.src;
p.connections.Add(pair);
c.pair = p;
p.pair = c;
junctionChords.Add(c);
pushChords.Add(c);
}
var cp0 = chord.connections[0].pair;
cp0.connections.Add(chord.connections[1]);
var cp1 = chord.connections[1].pair;
cp1.connections.Add(chord.connections[0]);
}
/// <summary>
/// 軸の接続情報から余分な軸を削除する
/// </summary>
/// <returns>The fans.</returns>
List <Fan2D> PruneBranch(ChordalAxis2D axis, List <Vector2> contour)
{
Stack <Chord2D> exploring = new Stack <Chord2D>();
List <Vertex2D> vertices = new List <Vertex2D>();
List <Fan2D> fans = new List <Fan2D>();
List <Chord2D> route = new List <Chord2D>();
Chord2D start = null;
foreach (var c in axis.terminalChords)
{
exploring.Push(c);
}
while (exploring.Count > 0)
{
var c = exploring.Pop();
if (c.face.category == Face2D.Category.Terminal)
{
vertices.Clear();
route.Clear();
route.Add(c);
start = c;
}
if (c.face.category == Face2D.Category.Junction)
{
vertices.Add(c.pair.dstEdge.a);
vertices.Add(c.pair.dstEdge.b);
var fan = new Fan2D(c.dst, vertices, contour, c.face);
fans.Add(fan);
// chordの接続を切る
foreach (var r in route)
{
axis.RemoveChord(r);
}
}
else
{
var cc = c.dstEdge.circumscribedCircle;
vertices.Add(c.face.ExcludeVertex(c.dstEdge));
bool unoverlapped = false;
foreach (var v in vertices)
{
if (!cc.Overlap(v.p))
{
unoverlapped = true;
break;
}
}
if (unoverlapped)
{
vertices.Add(c.dstEdge.a);
vertices.Add(c.dstEdge.b);
var fan = new Fan2D(c.dstEdge.mid, vertices, contour, c.face);
fans.Add(fan);
// chordの接続を切る
foreach (var r in route)
{
axis.RemoveChord(r);
}
}
else
{
route.Add(c.connections[0]);
exploring.Push(c.connections[0]);
}
}
}
return(fans);
}
