SetConstantZ Method (GeometryEngine)

In This Topic

Replaces each Z value on the geometry with the specified Z value.

Syntax

C#
Visual Basic (Declaration)

public Multipart SetConstantZ( 
   Multipart multipart,
   double zValue
)

Public Function SetConstantZ( _
   ByVal multipart As Multipart, _
   ByVal zValue As Double _
) As Multipart

Parameters

multipart: The polygon or polyline to replace Zs.
zValue: The Z value to assign.

Return Value

A geometry in which each coordinate has the specified Z value.

Exceptions

Exception	Description
System.ArgumentNullException	Multipart is null or empty.
System.InvalidOperationException	This geometry is not Z-Aware.

Example

Set all Zs in a polyline

List<Coordinate3D> coordsZ = new List<Coordinate3D>()
{
  new Coordinate3D(1, 2, 3),
  new Coordinate3D(4, 5, 6),
  new Coordinate3D(7, 8, double.NaN)
};

Polyline polyline = PolylineBuilderEx.CreatePolyline(coordsZ);
// polyline.HasZ = true

Polyline polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, -1) as Polyline;
// polylineSetZ.Points[0].Z = -1
// polylineSetZ.Points[1].Z = -1
// polylineSetZ.Points[2].Z = -1

polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, double.NaN) as Polyline;
// polyline.HasZ = true
// polylineSetZ.Points[0].HasZ = true
// polylineSetZ.Points[0].Z = NaN
// polylineSetZ.Points[1].HasZ = true
// polylineSetZ.Points[1].Z = NaN
// polylineSetZ.Points[2].HasZ = true
// polylineSetZ.Points[2].Z = NaN

polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, double.PositiveInfinity) as Polyline;
// polyline.HasZ = true
// polylineSetZ.Points[0].HasZ = true
// polylineSetZ.Points[0].Z = double.PositiveInfinity
// polylineSetZ.Points[1].HasZ = true
// polylineSetZ.Points[1].Z = double.PositiveInfinity
// polylineSetZ.Points[2].HasZ = true
// polylineSetZ.Points[2].Z = double.PositiveInfinity

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

GeometryEngine Class
GeometryEngine Members

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