public void DeleteHalfEdge(HalfEdge edge)
{
if (edge.Origin.Edge == edge)
{
foreach (var temp in edge.Origin.Walk())
{
if (temp == edge)
{
continue;
}
edge.Origin.SetEdge(temp);
break;
}
if (edge.Origin.Edge == edge)
{
edge.Origin.SetEdge(null);
}
}
if (edge.Twin.Origin.Edge == edge.Twin)
{
foreach (var temp in edge.Twin.Origin.Walk())
{
if (temp == edge.Twin)
{
continue;
}
edge.Twin.Origin.SetEdge(temp);
break;
}
if (edge.Twin.Origin.Edge == edge)
{
edge.Twin.Origin.SetEdge(null);
}
}
// edge.Next.SetPrevious(edge.Previous);
// edge.Twin.Next.SetPrevious(edge.Twin.Previous);
HalfEdges.Remove(edge.Twin);
HalfEdges.Remove(edge);
edge.Twin.SetOrigin(null);
edge.Twin.SetPolygon(null);
edge.Twin.SetNext(null);
edge.Twin.SetPrevious(null);
edge.Twin.SetTwin(null);
edge.SetPair(null);
edge.Twin.SetPair(null);
edge.SetOrigin(null);
edge.SetPolygon(null);
edge.SetNext(null);
edge.SetPrevious(null);
edge.SetTwin(null);
}
public HalfEdge CreateEdge(Node aNode, Node bNode, bool isDirected = false)
{
// if (aNode.Edge != null && bNode.Edge != null)
// throw new Exception();
var edgeAB = new HalfEdge(this);
var edgeBA = new HalfEdge(this);
var edge = new Edge(this);
var edgePolygon = CreatePolygon(edgeAB);
edgeAB.SetOrigin(aNode);
edgeBA.SetOrigin(bNode);
edgeAB.SetNext(edgeBA);
edgeAB.SetPrevious(edgeBA);
edgeAB.SetTwin(edgeBA);
edgeAB.SetPolygon(edgePolygon);
edgeBA.SetPolygon(edgePolygon);
if (isDirected)
{
edgeBA.SetActive(false);
}
edge.SetPair(edgeAB);
Edges.Add(edge);
HalfEdges.Add(edgeAB);
HalfEdges.Add(edgeBA);
return(edgeAB);
}
public HalfEdge SetTwin(HalfEdge edge)
{
Twin = edge;
if (edge != null && edge.Twin != this)
{
edge.SetTwin(this);
}
return(this);
}