private static void AssignFaceHandle(this Geometry geometry, int heHandle, Face newFace)
{
var oldFaceHandle = geometry.GetHalfEdgeByHandle(heHandle).IncidentFace;
var currentHe = geometry.GetHalfEdgeByHandle(heHandle);
do
{
currentHe.IncidentFace = newFace.Handle;
geometry.DictHalfEdges[currentHe.Handle] = currentHe;
currentHe = geometry.GetHalfEdgeByHandle(currentHe.NextHalfEdge);
} while (currentHe.Handle != heHandle);
//Assign newFace to possible holes in the "old" face.
var oldFace = geometry.GetFaceByHandle(oldFaceHandle);
if (oldFace.InnerHalfEdges.Count == 0)
{
return;
}
var inner = new List <int>();
inner.AddRange(oldFace.InnerHalfEdges);
foreach (var heh in inner)
{
var origin = geometry.GetHalfEdgeByHandle(heh).OriginVertex;
if (!geometry.IsPointInPolygon(newFace, geometry.GetVertexByHandle(origin)))
{
continue;
}
oldFace.InnerHalfEdges.Remove(heh);
newFace.InnerHalfEdges.Add(heh);
var curHe = geometry.GetHalfEdgeByHandle(heh);
do
{
curHe.IncidentFace = newFace.Handle;
geometry.DictHalfEdges[curHe.Handle] = curHe;
curHe = geometry.GetHalfEdgeByHandle(curHe.NextHalfEdge);
} while (curHe.Handle != heh);
}
}