internal HEdge(int id, HEVertex v1, HEVertex v2, HEEdge relative)
{
_id = id;
_v1 = v1;
_v2 = v2;
_relative = relative;
}
public void Dispose()
{
_id = HEMesh.InvaildID;
_v1 = null;
_v2 = null;
_relative = null;
}
public HEdge GetEdgeBetween(HEVertex v1, HEVertex v2)
{
if (IsConnected(v1, v2))
{
return(v1.OuterGoing.RelativeEdge);
}
return(null);
}
private HEVertex _NewVertex()
{
var ret = new HEVertex();
ret.ID = VertexCount;
_vertices.Add(ret);
return(ret);
}
public void Dispose()
{
_id = HEMesh.InvaildID;
_vertexTo = null;
_relativeFace = null;
_relativeEdge = null;
_nextEdge = null;
_preEdge = null;
_oppEdge = null;
}
internal HEEdge(int id, HEVertex goingTo, HEFace relativeFace, HEdge relativeEdge, HEEdge nextEdge, HEEdge preEdge, HEEdge oppEdge)
{
_id = id;
_vertexTo = goingTo;
_relativeFace = relativeFace;
_relativeEdge = relativeEdge;
_nextEdge = nextEdge;
_preEdge = preEdge;
_oppEdge = oppEdge;
}
/// <summary>
/// ret is point to v2
/// </summary>
internal HEEdge HEdgeBetween(HEVertex v1, HEVertex v2)
{
var edge = EdgeBetween(v1, v2);
if (edge != null)
{
return(edge.Relative.VertexTo == v2 ? edge.Relative : edge.Relative.OppEdge);
}
return(null);
}
public HEEdge HalfEdgeFromVertex(HEVertex vertex)
{
var edge = _relative;
while (true)
{
if (edge.VertexFrom == vertex)
{
return(edge);
}
edge = edge.NextEdge;
if (edge == _relative)
{
break;
}
}
return(null);
}
public bool Contains(HEVertex vertex)
{
var edge = _relative;
while (true)
{
if (edge.VertexTo == vertex)
{
return(true);
}
edge = edge.NextEdge;
if (edge == _relative)
{
break;
}
}
return(false);
}
public void DeleteVertex(HEVertex vertex)
{
if (vertex == null || vertex.IsDeleted)
{
return;
}
if (!vertex.IsIsolated)
{
var edges = vertex.GetAdjacentEdges();
foreach (var edge in edges)
{
DeleteEdge(edge);
}
}
_DeleteVertex(vertex);
}
public HEdge EdgeBetween(HEVertex v1, HEVertex v2)
{
if (v1 == null || v2 == null)
{
return(null);
}
if (!v1.IsIsolated)
{
var edge = v1.OuterGoing;
do
{
if (edge.VertexTo == v2)
{
return(edge.RelativeEdge);
}
edge = edge.RotateNext;
}while (edge != v1.OuterGoing);
}
return(null);
}
internal HEdge AddEdge(HEVertex v1, HEVertex v2)
{
if (v1 == null || v2 == null)
{
return(null);
}
var edge = EdgeBetween(v1, v2);
if (edge != null)
{
return(edge);
}
edge = _NewEdge();
var hedge1 = _NewHEdge();
var hedge2 = _NewHEdge();
edge.V1 = v1;
edge.V2 = v2;
edge.Relative = hedge1;
hedge1.VertexTo = v2;
hedge1.OppEdge = hedge2;
hedge1.RelativeEdge = edge;
hedge1.PreEdge = hedge2;
hedge1.NextEdge = hedge2;
hedge2.VertexTo = v1;
hedge2.OppEdge = hedge1;
hedge2.RelativeEdge = edge;
hedge2.PreEdge = hedge1;
hedge2.NextEdge = hedge1;
return(edge);
}
private void _DeleteVertex(HEVertex vertex)
{
_DeleteElement(vertex, _vertices);
}
public bool IsConnected(HEVertex v1, HEVertex v2)
{
return(EdgeBetween(v1, v2) != null);
}
public Vector3D GetVertexNormal(HEVertex vertex)
{
return(GetVertexNormal(vertex.ID));
}
