ITinNode2 Interface

Provides access to members that control TIN nodes.

Members

	Name	Description
	Degree	The degree of the node.
	GetAdjacentNodes	Returns all nodes comprising triangles sharing the specified node.
	GetIncidentEdges	Returns all edges sharing the specified node.
	GetIncidentTriangles	Returns all triangles sharing the specified node.
	GetVoronoiRegion	Returns the Voronoi-polygon region of the specified node.
	HasVoidZ	Indicates whether the element contains z-less vertex.
	IncidentTriangle	Returns any triangle having the node as one of it's vertices.
	IncidentTriangleIndex	Returns the index of any triangle having the node as one of it's vertices.
	Index	The element's index number.
	Init	Initializes a new TIN element.
	IsEmpty	Indicates if the specified element is uninitialized.
	IsInsideDataArea	Indicates if the specified element is within the interpolation zone of the TIN.
	IsInsideExtent	Indicates whether the element is inside the specified envelope.
	IsOnDomainBoundary	Indicates if the specified node is on domain's boundary.
	IsSameNode	Restricted.
	QueryAdjacentNodeIndices	Returns all nodes connecting to the node.
	QueryAsPoint	Sets the node equal to a point.
	QueryAsWKSPointZ	Sets the node equal to a point with a z value.
	QueryIncidentEdgeIndices	Returns all edges sharing the node.
	QueryIncidentTriangleIndices	Returns all triangles sharing the node.
	SetEmpty	Uninitializes the element.
	Source	The source of the node.
	TagValue	The tag value of the specified element.
	TheTin	The TIN object referenced by the element.
	X	The x-coordinate of the specified node.
	Y	The y-coordinate of the specified node.
	Z	The z-coordinate of the specified node.

ITinNode2.Degree Property

The degree of the node.

Public Function get_Degree ( _
    ByVal bEnforcedEdgesOnly As Boolean _
) As Integer

public int get_Degree (
    bool bEnforcedEdgesOnly
);

Description

The degree of a node is the number of edges that are incident to it.

When EnforcedEdgesOnly is set to TRUE only the number of incident edges that are classified as either hard or soft is returned. When set to FALSE all edges are used regardless of type.

A SingleEdge interpretation is used by this property.

ITinNode2.IncidentTriangle Method

Returns any triangle having the node as one of it's vertices.

Public Function IncidentTriangle ( _
) As ITinTriangle

public ITinTriangle IncidentTriangle (
);

Description

Returns one of the triangles that is incident to the node. There is no fixed rule to determine which triangle it will be. You are just assured it will be one that is defined, in part, by the node.

ITinNode2.IncidentTriangleIndex Method

Returns the index of any triangle having the node as one of it's vertices.

Public Function IncidentTriangleIndex ( _
) As Integer

public int IncidentTriangleIndex (
);

Description

Returns the index for one of the triangles incident to the node. There is no fixed rule to determine which triangle it will be. You are just assured it will be one that is defined, in part, by the node.

ITinNode2.IsOnDomainBoundary Property

Indicates if the specified node is on domain's boundary.

Public ReadOnly Property IsOnDomainBoundary As Boolean

public bool IsOnDomainBoundary {get;}

Description

The TIN's domain is the same thing as its interpolation zone. IsOnDomainBoundary returns TRUE if the node is on this boundary, separating data from nodata areas.

ITinNode2.QueryAdjacentNodeIndices Method

Returns all nodes connecting to the node.

Public Sub QueryAdjacentNodeIndices ( _
    ByVal pNodes As ILongArray _
)

public void QueryAdjacentNodeIndices (
    ILongArray pNodes
);

Description

Returns indices for nodes adjacent to the given node. These are its direct neighbors which are connected by triangle edges.

The passed object that implements ILongArray must have already been instantiated.

ITinNode2.QueryIncidentEdgeIndices Method

Returns all edges sharing the node.

Public Sub QueryIncidentEdgeIndices ( _
    ByVal pEdges As ILongArray _
)

public void QueryIncidentEdgeIndices (
    ILongArray pEdges
);

Description

This populates a LongArray with the indices of edges that surround the node.

The passed LongArray must already have been instantiated.

A single edge interpretation is used. This is where edges between adjacent triangles are shared.

Only edges that have their from node in common with the specified node are returned. Because of this, some boundary edges incident to super nodes will have no representation.

ITinNode2.QueryIncidentTriangleIndices Method

Returns all triangles sharing the node.

Public Sub QueryIncidentTriangleIndices ( _
    ByVal pTriangles As ILongArray _
)

public void QueryIncidentTriangleIndices (
    ILongArray pTriangles
);

Description

Returns indices for triangles incident to the node.

The passed object that implements ILongArray must have already been instantiated.

ITinNode2.Source Property

The source of the node.

Public ReadOnly Property Source As esriTinNodeSourceType

public esriTinNodeSourceType Source {get;}

Description

The source of a node is in reference to where it came from; its origin. An enumeration defines the possibilities:

esriTinDensified - added by the triangulator along a breakline so that it may be Delaunay conforming.

esriTinIntersection - added by the triangulator where breaklines intersect.

esriTinOriginal - a mass point or breakline vertex handed to the triangulator as user data.

esriTinSuperNode - one of 4 nodes added far outside the declared data extent when a TIN is first created.

esriTinUnknown - undefined/unspecified, probably coming from a TIN stored on disk.

TINs do not yet persist node source information. It is only maintained while the TIN is is edit mode. This means after a TIN has been saved to disk, all nodes, except for super nodes, become unknown.

Inherited Interfaces

Interfaces	Description
ITinNode	Provides access to members that control TIN nodes.
ITinElement	Provides access to members to control TIN elements.

Classes that implement ITinNode2

Classes	Description
TinNode	The Esri TinNode component.