GetTriangleByPoint Method

In This Topic

Gets the triangle at the specified point. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public TinTriangle GetTriangleByPoint( 
   MapPoint point
)

Public Function GetTriangleByPoint( _
   ByVal point As MapPoint _
) As TinTriangle

Parameters

point: Point location. This will be projected into the spatial reference of the TIN dataset.

Return Value

A TinTriangle

Exceptions

Exception	Description
System.ArgumentNullException	Point is null
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run

Remarks

If the point is incident to a node or edge than the triangle returned is the first triangle found.

To ensure maximum robustness, callers should explicitly dispose of the returned TinTriangle in either a using statement or a finally block.

Example

Access TIN Elements by MapPoint

// "identify" the closest node, edge, triangle
using (var nearestNode = tinDataset.GetNearestNode(mapPoint))
{
}

using (var nearestEdge = tinDataset.GetNearestEdge(mapPoint))
{
}
using (var triangle = tinDataset.GetTriangleByPoint(mapPoint))
{

}

// get the set of natural neighbours 
// (set of nodes that "mapPoint" would connect with to form triangles if it was added to the TIN)
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinNode> naturalNeighbors = tinDataset.GetNaturalNeighbors(mapPoint);

// get the set of triangles whose circumscribed circle contains "mapPoint" 
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinTriangle> triangles = tinDataset.GetTriangleNeighborhood(mapPoint);

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.

Reference

TinDataset Class
TinDataset Members

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