public HalfEdge Split(Vertex midpoint)
{
Mesh.InformSplitMidpointBegin(this, midpoint);
if (midpoint.Equals(End) || midpoint.Equals(Twin.End))
{
return(this);
}
var a = Twin.End;
var m = midpoint;
var b = End;
Twin.End = m;
var bm = Twin;
var mb = this;
var am = Mesh.GetEdge(a, m, Face, Face == null ? null : mb, mb.Twin.Face, mb.Twin.Next);
var ma = am.Twin;
if (Face != null)
{
bm.Next = ma;
Face.Edges.Where(e => e.Next == this).First().Next = am;
}
if (Twin.Face != null)
{
Twin.Face.Edges.Where(e => e.Next == Twin).First().Next = bm;
}
Mesh.InformSplitMidpointEnd(this, midpoint);
return(am);
}
/// <summary>
/// Inserts a midpoint into this face
/// Deletes this face
/// </summary>
/// <param name="midpoint">The midpoint.</param>
public void InsertMidpoint(Vertex midpoint)
{
Mesh.InformSplitMidpointBegin(this, midpoint);
var edges = Edges.ToArray();
Delete();
for (int i = 0; i < edges.Length; i++)
{
var v1 = edges[i].End;
var v2 = edges[(i + 1) % edges.Length].End;
Mesh.GetFace(v1, v2, midpoint);
}
Mesh.InformSplitMidpointEnd(this, midpoint);
}
