internal EdgePoint(SU.EdgeRef edgeRef, SU.VertexRef vertexRef)
{
SU.EdgeGetSmooth(edgeRef, out bool isSmooth);
IsSmooth = IsSmooth;
SU.Point3D point = new SU.Point3D();
SU.VertexGetPosition(vertexRef, ref point);
Vertex = new Point3(point);
}