private static void Join2DGeometries(Geometry first, Geometry second)
{
var highestVertHandle = first.HighestVertHandle;
var highestHalfEdgeHandle = first.HighestHalfEdgeHandle;
var highestFaceHandle = first.HighestFaceHandle;
var vertDictHelper = new Dictionary <int, Vertex>();
foreach (var v in second.DictVertices)
{
var vert = new Vertex(v.Value.Handle + highestVertHandle, v.Value.VertData.Pos);
vert.IncidentHalfEdge = v.Value.IncidentHalfEdge + highestHalfEdgeHandle;
vertDictHelper.Add(vert.Handle, vert);
}
second.DictVertices.Clear();
second.DictVertices = vertDictHelper;
var faceDictHelper = new Dictionary <int, Face>();
foreach (var f in second.DictFaces)
{
var face = new Face(f.Value.Handle + highestFaceHandle, f.Value);
if (face.OuterHalfEdge != default(int))
{
var outerHeId = face.OuterHalfEdge + first.HighestHalfEdgeHandle;
face.OuterHalfEdge = outerHeId;
}
for (var k = 0; k < face.InnerHalfEdges.Count; k++)
{
var innerHe = face.InnerHalfEdges[k];
innerHe = innerHe + first.HighestHalfEdgeHandle;
face.InnerHalfEdges[k] = innerHe;
}
faceDictHelper.Add(face.Handle, face);
}
second.DictFaces.Clear();
second.DictFaces = faceDictHelper;
var heDictHelper = new Dictionary <int, HalfEdge>();
foreach (var he in second.DictHalfEdges)
{
var halfEdge = new HalfEdge(he.Value.Handle + highestHalfEdgeHandle, he.Value);
halfEdge.IncidentFace = halfEdge.IncidentFace + first.HighestFaceHandle;
halfEdge.OriginVertex = halfEdge.OriginVertex + first.HighestVertHandle;
halfEdge.NextHalfEdge = halfEdge.NextHalfEdge + highestHalfEdgeHandle;
halfEdge.PrevHalfEdge = halfEdge.PrevHalfEdge + highestHalfEdgeHandle;
if (halfEdge.TwinHalfEdge != default(int))
{
halfEdge.TwinHalfEdge = halfEdge.TwinHalfEdge + highestHalfEdgeHandle;
}
heDictHelper.Add(halfEdge.Handle, halfEdge);
}
second.DictHalfEdges.Clear();
second.DictHalfEdges = heDictHelper;
//Change winding.
var hEdgesWChangedWinding = second.GetHalfEdgesWChangedWinding(second.GetAllHalfEdges()).ToList();
//Add data of second geometry to the first.
foreach (var vert in second.DictVertices)
{
first.DictVertices.Add(vert.Key, vert.Value);
}
foreach (var halfEdge in hEdgesWChangedWinding)
{
first.DictHalfEdges.Add(halfEdge.Handle, halfEdge);
}
//Write content of second unbounded face into the first - delete second unbounded face
var firstUnbounded = first.DictFaces[first.DictFaces.Keys.Min()];
var secUnbounded = second.DictFaces[second.DictFaces.Keys.Min()];
firstUnbounded.InnerHalfEdges.AddRange(secUnbounded.InnerHalfEdges);
second.DictFaces.Remove(secUnbounded.Handle);
var secUnboundedHalfEdges = new List <HalfEdge>();
foreach (var he in first.GetAllHalfEdges())
{
if (he.IncidentFace == secUnbounded.Handle)
{
secUnboundedHalfEdges.Add(he);
}
}
//Replace the incident face of the half edges.
foreach (var he in secUnboundedHalfEdges)
{
var halfEdge = he;
halfEdge.IncidentFace = firstUnbounded.Handle;
first.DictHalfEdges.Remove(halfEdge.Handle);
first.DictHalfEdges.Add(halfEdge.Handle, halfEdge);
}
//Add faces to the first geometry and recalculate the face normals.
foreach (var face in second.DictFaces)
{
first.DictFaces.Add(face.Key, face.Value);
first.SetFaceNormal(first.GetFaceOuterVertices(face.Key).ToList(), first.DictFaces[face.Key]);
}
first.SetHighestHandles();
}