ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data.Analyst3D Namespace / TinEdge Class / GeNeighbor Method
Example Version

GeNeighbor Method
Gets the corresponding edge of the triangle opposite to this TIN edge. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public TinEdge GeNeighbor()

Return Value

Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run
Remarks
A triangle is comprised of three edges. They are ordered clockwise. So, the RightTriangle of an edge is the triangle the edge belongs to. An edge's neighboring edge is the edge of the LeftTriangle that shares the same nodes (although from and to are reversed). GetNeighbor will return null when the edge is on the absolute boundary of the triangulation.
Example
TIN Edges
// nodes of the edge
var nodes = edge.Nodes;

// edge geometry
var polyline = edge.ToPolyline();
// edge length
var length = edge.Length;
// is the edge "inside"
var isInsideEdge = edge.IsInsideDataArea;
// edge type - regular/hard/soft
var edgeType = edge.EdgeType;

// get next (clockwise) edge in the triangle
var nextEdge = edge.GetNextEdgeInTriangle();
// get previous (anti-clockwise) edge in the triangle
var prevEdge = edge.GetPreviousEdgeInTriangle();

// get opposite edge
var oppEdge = edge.GeNeighbor();

// get left triangle
var leftTriangle = edge.LeftTriangle;
// get right triangle
var rightTriangle = edge.RightTriangle;
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.
See Also